what you give them. Help stamp out software-hoarding!
-------------------------------------------------------------------------*/
+#define DEBUG_CF(x) /* puts(x); */
+
#include "common.h"
-#include "newalloc.h"
-int currLineno = 0;
-set *astList = NULL ;
+int currLineno = 0;
+set *astList = NULL;
set *operKeyReset = NULL;
ast *staticAutos = NULL;
-int labelKey = 1 ;
+int labelKey = 1;
+static struct {
+ int count; /* number of inline functions inserted */
+ symbol * retsym; /* variable for inlined function return value */
+ symbol * retlab; /* label ending inlined function (virtual return) */
+} inlineState;
#define LRVAL(x) x->left->rvalue
#define RRVAL(x) x->right->rvalue
#define ALLOCATE 1
#define DEALLOCATE 2
-char buffer[1024];
int noLineno = 0;
-int noAlloc = 0 ;
-symbol *currFunc ;
-ast *createIval (ast *, sym_link *, initList *, ast *);
-ast *createIvalCharPtr (ast *, sym_link *, ast *);
-ast *optimizeRRCRLC ( ast * );
-ast *optimizeGetHbit(ast *);
-ast *backPatchLabels (ast *,symbol *,symbol *);
-int inInitMode = 0;
-FILE *codeOutFile ;
-int ptt(ast *tree) {
- printTypeChain(tree->ftype,stdout);
- return 0;
+int noAlloc = 0;
+symbol *currFunc=NULL;
+static ast *createIval (ast *, sym_link *, initList *, ast *, ast *);
+static ast *createIvalCharPtr (ast *, sym_link *, ast *, ast *);
+static ast *optimizeCompare (ast *);
+ast *optimizeRRCRLC (ast *);
+ast *optimizeSWAP (ast *);
+ast *optimizeGetHbit (ast *, RESULT_TYPE);
+ast *optimizeGetAbit (ast *, RESULT_TYPE);
+ast *optimizeGetByte (ast *, RESULT_TYPE);
+ast *optimizeGetWord (ast *, RESULT_TYPE);
+static ast *backPatchLabels (ast *, symbol *, symbol *);
+void PA(ast *t);
+int inInitMode = 0;
+memmap *GcurMemmap=NULL; /* points to the memmap that's currently active */
+struct dbuf_s *codeOutBuf;
+int
+ptt (ast * tree)
+{
+ printTypeChain (tree->ftype, stdout);
+ return 0;
}
/*-----------------------------------------------------------------*/
-/* newAst - creates a fresh node for an expression tree */
+/* newAst - creates a fresh node for an expression tree */
/*-----------------------------------------------------------------*/
-#if 0
-ast *newAst (int type, void *op )
-{
- ast *ex ;
- static int oldLineno = 0 ;
-
- Safe_calloc(1,ex,sizeof(ast));
-
- ex->type = type ;
- ex->lineno = (noLineno ? oldLineno : yylineno);
- ex->filename = currFname ;
- ex->level = NestLevel ;
- ex->block = currBlockno ;
- ex->initMode = inInitMode;
-
- /* depending on the type */
- switch (type) {
- case EX_VALUE :
- ex->opval.val = (value *) op;
- break ;
- case EX_OP :
- ex->opval.op = (long) op ;
- break ;
- case EX_LINK :
- ex->opval.lnk = (sym_link *) op;
- break ;
- case EX_STMNT :
- ex->opval.stmnt= (unsigned) op;
- }
-
- return ex;
-}
-#endif
-
-static ast* newAst_(unsigned type)
-{
- ast *ex ;
- static int oldLineno = 0 ;
-
- ex = Safe_calloc(1,sizeof(ast));
-
- ex->type = type ;
- ex->lineno = (noLineno ? oldLineno : yylineno);
- ex->filename = currFname ;
- ex->level = NestLevel ;
- ex->block = currBlockno ;
- ex->initMode = inInitMode;
- return ex;
-}
-
-ast* newAst_VALUE(value*val)
+static ast *
+newAst_ (unsigned type)
{
- ast* ex = newAst_(EX_VALUE);
- ex->opval.val = val;
- return ex;
+ ast *ex;
+
+ ex = Safe_alloc ( sizeof (ast));
+
+ ex->type = type;
+ ex->lineno = (noLineno ? 0 : lexLineno);
+ ex->filename = lexFilename;
+ ex->level = NestLevel;
+ ex->block = currBlockno;
+ ex->initMode = inInitMode;
+ ex->seqPoint = seqPointNo;
+ return ex;
}
-ast* newAst_OP(unsigned op)
+ast *
+newAst_VALUE (value * val)
{
- ast*ex = newAst_(EX_OP);
- ex->opval.op = op;
- return ex;
+ ast *ex = newAst_ (EX_VALUE);
+ ex->opval.val = val;
+ return ex;
}
-ast* newAst_LINK(sym_link*val)
+ast *
+newAst_OP (unsigned op)
{
- ast* ex = newAst_(EX_LINK);
- ex->opval.lnk = val;
- return ex;
+ ast *ex = newAst_ (EX_OP);
+ ex->opval.op = op;
+ return ex;
}
-ast* newAst_STMNT(unsigned val)
+ast *
+newAst_LINK (sym_link * val)
{
- ast* ex = newAst_(EX_STMNT);
- ex->opval.stmnt = val;
- return ex;
+ ast *ex = newAst_ (EX_LINK);
+ ex->opval.lnk = val;
+ return ex;
}
/*-----------------------------------------------------------------*/
/* newNode - creates a new node */
/*-----------------------------------------------------------------*/
-ast *newNode ( long op, ast *left, ast *right )
+ast *
+newNode (long op, ast * left, ast * right)
{
- ast *ex ;
+ ast *ex;
- ex = newAst_OP(op) ;
- ex->left = left ;
- ex->right = right;
+ ex = newAst_OP (op);
+ ex->left = left;
+ ex->right = right;
- return ex ;
+ return ex;
}
/*-----------------------------------------------------------------*/
/* newIfxNode - creates a new Ifx Node */
/*-----------------------------------------------------------------*/
-ast *newIfxNode (ast *condAst, symbol *trueLabel, symbol *falseLabel)
+ast *
+newIfxNode (ast * condAst, symbol * trueLabel, symbol * falseLabel)
{
- ast *ifxNode ;
-
- /* if this is a literal then we already know the result */
- if (condAst->etype && IS_LITERAL(condAst->etype)) {
+ ast *ifxNode;
- /* then depending on the expression value */
- if ( floatFromVal(condAst->opval.val) )
- ifxNode = newNode(GOTO,
- newAst_VALUE(symbolVal(trueLabel)),
- NULL);
- else
- ifxNode = newNode(GOTO,
- newAst_VALUE(symbolVal(falseLabel)),
- NULL);
+ /* if this is a literal then we already know the result */
+ if (condAst->etype && IS_LITERAL (condAst->etype))
+ {
+ /* then depending on the expression value */
+ if (floatFromVal (condAst->opval.val))
+ ifxNode = newNode (GOTO,
+ newAst_VALUE (symbolVal (trueLabel)),
+ NULL);
+ else
+ ifxNode = newNode (GOTO,
+ newAst_VALUE (symbolVal (falseLabel)),
+ NULL);
}
- else {
- ifxNode = newNode(IFX,condAst,NULL);
- ifxNode->trueLabel = trueLabel;
- ifxNode->falseLabel= falseLabel;
+ else
+ {
+ ifxNode = newNode (IFX, condAst, NULL);
+ ifxNode->trueLabel = trueLabel;
+ ifxNode->falseLabel = falseLabel;
}
- return ifxNode ;
+ return ifxNode;
}
/*-----------------------------------------------------------------*/
-/* copyAstValues - copies value portion of ast if needed */
+/* copyAstValues - copies value portion of ast if needed */
/*-----------------------------------------------------------------*/
-void copyAstValues (ast *dest,ast *src)
+void
+copyAstValues (ast * dest, ast * src)
{
- switch (src->opval.op) {
+ switch (src->opval.op)
+ {
case BLOCK:
- dest->values.sym = copySymbolChain(src->values.sym);
- break;
+ dest->values.sym = copySymbolChain (src->values.sym);
+ break;
case SWITCH:
- dest->values.switchVals.swVals =
- copyValue(src->values.switchVals.swVals);
- dest->values.switchVals.swDefault =
- src->values.switchVals.swDefault ;
- dest->values.switchVals.swNum =
- src->values.switchVals.swNum ;
- break ;
+ dest->values.switchVals.swVals =
+ copyValue (src->values.switchVals.swVals);
+ dest->values.switchVals.swDefault =
+ src->values.switchVals.swDefault;
+ dest->values.switchVals.swNum =
+ src->values.switchVals.swNum;
+ break;
case INLINEASM:
- dest->values.inlineasm = Safe_calloc(1,strlen(src->values.inlineasm)+1);
- strcpy(dest->values.inlineasm,src->values.inlineasm);
+ dest->values.inlineasm = Safe_strdup(src->values.inlineasm);
+ break;
+
+ case ARRAYINIT:
+ dest->values.constlist = copyLiteralList(src->values.constlist);
+ break;
case FOR:
- AST_FOR(dest,trueLabel) = copySymbol(AST_FOR(src,trueLabel));
- AST_FOR(dest,continueLabel) = copySymbol(AST_FOR(src,continueLabel));
- AST_FOR(dest,falseLabel) = copySymbol(AST_FOR(src,falseLabel));
- AST_FOR(dest,condLabel) = copySymbol(AST_FOR(src,condLabel));
- AST_FOR(dest,initExpr) = copyAst (AST_FOR(src,initExpr)) ;
- AST_FOR(dest,condExpr) = copyAst (AST_FOR(src,condExpr)) ;
- AST_FOR(dest,loopExpr) = copyAst (AST_FOR(src,loopExpr)) ;
+ AST_FOR (dest, trueLabel) = copySymbol (AST_FOR (src, trueLabel));
+ AST_FOR (dest, continueLabel) = copySymbol (AST_FOR (src, continueLabel));
+ AST_FOR (dest, falseLabel) = copySymbol (AST_FOR (src, falseLabel));
+ AST_FOR (dest, condLabel) = copySymbol (AST_FOR (src, condLabel));
+ AST_FOR (dest, initExpr) = copyAst (AST_FOR (src, initExpr));
+ AST_FOR (dest, condExpr) = copyAst (AST_FOR (src, condExpr));
+ AST_FOR (dest, loopExpr) = copyAst (AST_FOR (src, loopExpr));
}
}
/*-----------------------------------------------------------------*/
/* copyAst - makes a copy of a given astession */
/*-----------------------------------------------------------------*/
-ast *copyAst (ast *src)
+ast *
+copyAst (ast * src)
{
- ast *dest;
+ ast *dest;
- if (!src) return NULL ;
+ if (!src)
+ return NULL;
- dest = Safe_calloc(1,sizeof(ast));
+ dest = Safe_alloc ( sizeof (ast));
- dest->type = src->type ;
- dest->lineno = src->lineno ;
- dest->level = src->level ;
- dest->funcName = src->funcName;
- dest->argSym = src->argSym;
+ dest->type = src->type;
+ dest->filename = src->filename;
+ dest->lineno = src->lineno;
+ dest->level = src->level;
+ dest->funcName = src->funcName;
+ dest->reversed = src->reversed;
- /* if this is a leaf */
- /* if value */
- if (src->type == EX_VALUE) {
- dest->opval.val = copyValue(src->opval.val);
- goto exit;
+ if (src->ftype)
+ dest->etype = getSpec (dest->ftype = copyLinkChain (src->ftype));
+
+ /* if this is a leaf */
+ /* if value */
+ if (src->type == EX_VALUE)
+ {
+ dest->opval.val = copyValue (src->opval.val);
+ goto exit;
}
- /* if link */
- if (src->type == EX_LINK) {
- dest->opval.lnk = copyLinkChain(src->opval.lnk);
- goto exit ;
+ /* if link */
+ if (src->type == EX_LINK)
+ {
+ dest->opval.lnk = copyLinkChain (src->opval.lnk);
+ goto exit;
}
- dest->opval.op = src->opval.op ;
+ dest->opval.op = src->opval.op;
+
+ /* if this is a node that has special values */
+ copyAstValues (dest, src);
+
+ dest->trueLabel = copySymbol (src->trueLabel);
+ dest->falseLabel = copySymbol (src->falseLabel);
+ dest->left = copyAst (src->left);
+ dest->right = copyAst (src->right);
+exit:
+ return dest;
+
+}
+#if 0
+/*-----------------------------------------------------------------*/
+/* removeIncDecOps: remove for side effects in *_ASSIGN's */
+/* "*s++ += 3" -> "*s++ = *s++ + 3" */
+/*-----------------------------------------------------------------*/
+ast *removeIncDecOps (ast * tree) {
+
+ // traverse the tree and remove inc/dec ops
+
+ if (!tree)
+ return NULL;
+
+ if (tree->type == EX_OP &&
+ (tree->opval.op == INC_OP || tree->opval.op == DEC_OP)) {
+ if (tree->left)
+ tree=tree->left;
+ else
+ tree=tree->right;
+ }
+
+ tree->left=removeIncDecOps(tree->left);
+ tree->right=removeIncDecOps(tree->right);
+
+ return tree;
+}
+
+/*-----------------------------------------------------------------*/
+/* removePreIncDecOps: remove for side effects in *_ASSIGN's */
+/* "*++s += 3" -> "*++s = *++s + 3" */
+/*-----------------------------------------------------------------*/
+ast *removePreIncDecOps (ast * tree) {
+
+ // traverse the tree and remove pre-inc/dec ops
+
+ if (!tree)
+ return NULL;
+
+ if (tree->type == EX_OP &&
+ (tree->opval.op == INC_OP || tree->opval.op == DEC_OP)) {
+ if (tree->right)
+ tree=tree->right;
+ }
+
+ tree->left=removePreIncDecOps(tree->left);
+ tree->right=removePreIncDecOps(tree->right);
+
+ return tree;
+}
+
+/*-----------------------------------------------------------------*/
+/* removePostIncDecOps: remove for side effects in *_ASSIGN's */
+/* "*s++ += 3" -> "*s++ = *s++ + 3" */
+/*-----------------------------------------------------------------*/
+ast *removePostIncDecOps (ast * tree) {
+
+ // traverse the tree and remove pre-inc/dec ops
+
+ if (!tree)
+ return NULL;
+
+ if (tree->type == EX_OP &&
+ (tree->opval.op == INC_OP || tree->opval.op == DEC_OP)) {
+ if (tree->left)
+ tree=tree->left;
+ }
+
+ tree->left=removePostIncDecOps(tree->left);
+ tree->right=removePostIncDecOps(tree->right);
+
+ return tree;
+}
+#endif
+/*-----------------------------------------------------------------*/
+/* replaceAstWithTemporary: Replace the AST pointed to by the arg */
+/* with a reference to a new temporary variable. Returns*/
+/* an AST which assigns the original value to the */
+/* temporary. */
+/*-----------------------------------------------------------------*/
+static ast *replaceAstWithTemporary(ast **treeptr)
+{
+ symbol *sym = newSymbol (genSymName(NestLevel), NestLevel );
+ ast *tempvar;
+
+ /* Tell gatherImplicitVariables() to automatically give the
+ symbol the correct type */
+ sym->infertype = 1;
+ sym->type = NULL;
+ sym->etype = NULL;
+
+ tempvar = newNode('=', newAst_VALUE(symbolVal(sym)), *treeptr);
+ *treeptr = newAst_VALUE(symbolVal(sym));
+
+ addSymChain(&sym);
+
+ return tempvar;
+}
+
+/*-----------------------------------------------------------------*/
+/* createRMW: Create a read-modify-write expression, using a */
+/* temporary variable if necessary to avoid duplicating */
+/* any side effects, for use in e.g. */
+/* foo()->count += 5; becomes */
+/* tmp = foo(); tmp->count = tmp->count + 5; */
+/*-----------------------------------------------------------------*/
+ast * createRMW (ast *target, unsigned op, ast *operand)
+{
+ ast *readval, *writeval;
+ ast *tempvar1 = NULL;
+ ast *tempvar2 = NULL;
+ ast *result;
+
+ if (!target || !operand) {
+ return NULL;
+ }
+
+ /* we need to create two copies of target: one to read from and
+ one to write to. but we need to do this without duplicating
+ any side effects that may be contained in the tree. */
+
+ if (IS_AST_OP(target)) {
+ /* if this is a dereference, put the referenced item in the temporary */
+ if (IS_DEREF_OP(target) || target->opval.op == PTR_OP) {
+ /* create a new temporary containing the item being dereferenced */
+ if (hasSEFcalls(target->left))
+ tempvar1 = replaceAstWithTemporary(&(target->left));
+ } else if (target->opval.op == '[') {
+ /* Array access is similar, but we have to avoid side effects in
+ both values [WIML: Why not transform a[b] to *(a+b) in parser?] */
+ if (hasSEFcalls(target->left))
+ tempvar1 = replaceAstWithTemporary(&(target->left));
+ if (hasSEFcalls(target->right))
+ tempvar2 = replaceAstWithTemporary(&(target->right));
+ } else if ((target->opval.op == INC_OP) || (target->opval.op == DEC_OP)) {
+ /* illegal pre/post-increment/decrement */
+ werrorfl (target->filename, target->lineno, E_LVALUE_REQUIRED, "=");
+ } else {
+ /* we would have to handle '.', but it is not generated any more */
+ wassertl(target->opval.op != '.', "obsolete opcode in tree");
+
+ /* no other kinds of ASTs are lvalues and can contain side effects */
+ }
+ }
- /* if this is a node that has special values */
- copyAstValues (dest,src);
+ readval = target;
+ writeval = copyAst(target);
- if ( src->ftype )
- dest->etype = getSpec(dest->ftype = copyLinkChain(src->ftype)) ;
+ result = newNode('=', writeval, newNode(op, readval, operand));
+ if (tempvar2)
+ result = newNode(',', tempvar2, result);
+ if (tempvar1)
+ result = newNode(',', tempvar1, result);
- dest->trueLabel = copySymbol (src->trueLabel);
- dest->falseLabel= copySymbol (src->falseLabel);
- dest->left = copyAst(src->left);
- dest->right= copyAst(src->right);
- exit:
- return dest ;
+ return result;
}
/*-----------------------------------------------------------------*/
-/* hasSEFcalls - returns TRUE if tree has a function call */
+/* hasSEFcalls - returns TRUE if tree has a function call, */
+/* inc/decrement, or other side effect */
/*-----------------------------------------------------------------*/
-bool hasSEFcalls ( ast *tree)
+bool
+hasSEFcalls (ast * tree)
{
- if (!tree)
- return FALSE ;
+ if (!tree)
+ return FALSE;
- if (tree->type == EX_OP &&
- ( tree->opval.op == CALL ||
- tree->opval.op == PCALL ||
- tree->opval.op == '=' ||
- tree->opval.op == INC_OP ||
- tree->opval.op == DEC_OP ))
- return TRUE;
+ if (tree->type == EX_OP &&
+ (tree->opval.op == CALL ||
+ tree->opval.op == PCALL ||
+ tree->opval.op == '=' ||
+ tree->opval.op == INC_OP ||
+ tree->opval.op == DEC_OP))
+ return TRUE;
- return ( hasSEFcalls(tree->left) |
- hasSEFcalls(tree->right));
+ return (hasSEFcalls (tree->left) |
+ hasSEFcalls (tree->right));
}
/*-----------------------------------------------------------------*/
/* isAstEqual - compares two asts & returns 1 if they are equal */
/*-----------------------------------------------------------------*/
-int isAstEqual (ast *t1, ast *t2)
+static int
+isAstEqual (ast * t1, ast * t2)
{
- if (!t1 && !t2)
- return 1;
+ if (!t1 && !t2)
+ return 1;
- if (!t1 || !t2)
- return 0;
+ if (!t1 || !t2)
+ return 0;
- /* match type */
- if (t1->type != t2->type)
- return 0;
+ /* match type */
+ if (t1->type != t2->type)
+ return 0;
- switch (t1->type) {
+ switch (t1->type)
+ {
case EX_OP:
- if (t1->opval.op != t2->opval.op)
- return 0;
- return ( isAstEqual(t1->left,t2->left) &&
- isAstEqual(t1->right,t2->right));
- break;
+ if (t1->opval.op != t2->opval.op)
+ return 0;
+ return (isAstEqual (t1->left, t2->left) &&
+ isAstEqual (t1->right, t2->right));
+ break;
case EX_VALUE:
- if (t1->opval.val->sym) {
- if (!t2->opval.val->sym)
- return 0;
- else
- return isSymbolEqual(t1->opval.val->sym,
- t2->opval.val->sym);
- }
- else {
- if (t2->opval.val->sym)
- return 0;
+ if (t1->opval.val->sym)
+ {
+ if (!t2->opval.val->sym)
+ return 0;
+ else
+ return isSymbolEqual (t1->opval.val->sym,
+ t2->opval.val->sym);
+ }
else
- return (floatFromVal(t1->opval.val) ==
- floatFromVal(t2->opval.val));
- }
- break;
+ {
+ if (t2->opval.val->sym)
+ return 0;
+ else
+ return (floatFromVal (t1->opval.val) ==
+ floatFromVal (t2->opval.val));
+ }
+ break;
- /* only compare these two types */
- default :
- return 0;
+ /* only compare these two types */
+ default:
+ return 0;
}
- return 0;
+ return 0;
}
/*-----------------------------------------------------------------*/
/* resolveSymbols - resolve symbols from the symbol table */
/*-----------------------------------------------------------------*/
-ast *resolveSymbols (ast *tree)
+ast *
+resolveSymbols (ast * tree)
{
- /* walk the entire tree and check for values */
- /* with symbols if we find one then replace */
- /* symbol with that from the symbol table */
+ /* walk the entire tree and check for values */
+ /* with symbols if we find one then replace */
+ /* symbol with that from the symbol table */
- if ( tree == NULL )
- return tree ;
+ if (tree == NULL)
+ return tree;
- /* print the line */
- /* if not block & function */
- if ( tree->type == EX_OP &&
- ( tree->opval.op != FUNCTION &&
- tree->opval.op != BLOCK &&
- tree->opval.op != NULLOP )) {
- filename = tree->filename ;
- lineno = tree->lineno ;
+#if 0
+ /* print the line */
+ /* if not block & function */
+ if (tree->type == EX_OP &&
+ (tree->opval.op != FUNCTION &&
+ tree->opval.op != BLOCK &&
+ tree->opval.op != NULLOP))
+ {
+ filename = tree->filename;
+ lineno = tree->lineno;
}
+#endif
- /* make sure we resolve the true & false labels for ifx */
- if (tree->type == EX_OP && tree->opval.op == IFX ) {
- symbol *csym ;
-
- if (tree->trueLabel) {
- if (( csym = findSym(LabelTab,tree->trueLabel,
- tree->trueLabel->name)))
- tree->trueLabel = csym ;
- else
- werror(E_LABEL_UNDEF,tree->trueLabel->name);
- }
+ /* make sure we resolve the true & false labels for ifx */
+ if (tree->type == EX_OP && tree->opval.op == IFX)
+ {
+ symbol *csym;
- if (tree->falseLabel) {
- if (( csym = findSym(LabelTab,
- tree->falseLabel,
- tree->falseLabel->name)))
- tree->falseLabel = csym ;
- else
- werror(E_LABEL_UNDEF,tree->falseLabel->name);
- }
+ if (tree->trueLabel)
+ {
+ if ((csym = findSym (LabelTab, tree->trueLabel,
+ tree->trueLabel->name)))
+ tree->trueLabel = csym;
+ else
+ werrorfl (tree->filename, tree->lineno, E_LABEL_UNDEF,
+ tree->trueLabel->name);
+ }
+ if (tree->falseLabel)
+ {
+ if ((csym = findSym (LabelTab,
+ tree->falseLabel,
+ tree->falseLabel->name)))
+ tree->falseLabel = csym;
+ else
+ werrorfl (tree->filename, tree->lineno, E_LABEL_UNDEF,
+ tree->falseLabel->name);
+ }
}
- /* if this is a label resolve it from the labelTab*/
- if (IS_AST_VALUE(tree) &&
- tree->opval.val->sym &&
- tree->opval.val->sym->islbl) {
-
- symbol *csym = findSym (LabelTab, tree->opval.val->sym ,
- tree->opval.val->sym->name);
+ /* if this is a label resolve it from the labelTab */
+ if (IS_AST_VALUE (tree) &&
+ tree->opval.val->sym &&
+ tree->opval.val->sym->islbl)
+ {
+ symbol *csym = findSym (LabelTab, tree->opval.val->sym,
+ tree->opval.val->sym->name);
- if (!csym)
- werror (E_LABEL_UNDEF,tree->opval.val->sym->name);
- else
- tree->opval.val->sym = csym ;
+ if (!csym)
+ werrorfl (tree->filename, tree->lineno, E_LABEL_UNDEF,
+ tree->opval.val->sym->name);
+ else
+ tree->opval.val->sym = csym;
- goto resolveChildren ;
+ goto resolveChildren;
}
- /* do only for leafs */
- if (IS_AST_VALUE(tree) &&
- tree->opval.val->sym &&
- ! tree->opval.val->sym->implicit ) {
-
- symbol *csym = findSymWithLevel (SymbolTab,tree->opval.val->sym);
+ /* do only for leafs */
+ if (IS_AST_VALUE (tree) &&
+ tree->opval.val->sym &&
+ !tree->opval.val->sym->implicit)
+ {
+ symbol *csym = findSymWithLevel (SymbolTab, tree->opval.val->sym);
- /* if found in the symbol table & they r not the same */
- if (csym && tree->opval.val->sym != csym ) {
- tree->opval.val->sym = csym ;
- tree->opval.val->type = csym->type;
- tree->opval.val->etype = csym->etype;
- }
+ /* if found in the symbol table & they are not the same */
+ if (csym && tree->opval.val->sym != csym)
+ {
+ tree->opval.val->sym = csym;
+ tree->opval.val->type = csym->type;
+ tree->opval.val->etype = csym->etype;
+ }
- /* if not found in the symbol table */
- /* mark it as undefined assume it is*/
- /* an integer in data space */
- if (!csym && !tree->opval.val->sym->implicit) {
-
- /* if this is a function name then */
- /* mark it as returning an int */
- if (tree->funcName) {
- tree->opval.val->sym->type = newLink();
- DCL_TYPE(tree->opval.val->sym->type) = FUNCTION;
- tree->opval.val->sym->type->next =
- tree->opval.val->sym->etype = newIntLink();
- tree->opval.val->etype = tree->opval.val->etype;
- tree->opval.val->type = tree->opval.val->sym->type;
- werror(W_IMPLICIT_FUNC,tree->opval.val->sym->name);
- } else {
- tree->opval.val->sym->undefined =1 ;
- tree->opval.val->type =
- tree->opval.val->etype = newIntLink();
- tree->opval.val->sym->type =
- tree->opval.val->sym->etype = newIntLink();
- }
- }
+ /* if not found in the symbol table */
+ /* mark it as undefined & assume it */
+ /* is an integer in data space */
+ if (!csym && !tree->opval.val->sym->implicit)
+ {
+ /* if this is a function name then */
+ /* mark it as returning an int */
+ if (tree->funcName)
+ {
+ tree->opval.val->sym->type = newLink (DECLARATOR);
+ DCL_TYPE (tree->opval.val->sym->type) = FUNCTION;
+ tree->opval.val->sym->type->next =
+ tree->opval.val->sym->etype = newIntLink ();
+ tree->opval.val->etype = tree->opval.val->etype;
+ tree->opval.val->type = tree->opval.val->sym->type;
+ werrorfl (tree->filename, tree->lineno, W_IMPLICIT_FUNC,
+ tree->opval.val->sym->name);
+ //tree->opval.val->sym->undefined = 1;
+ allocVariables (tree->opval.val->sym);
+ }
+ else
+ {
+ tree->opval.val->sym->undefined = 1;
+ tree->opval.val->type =
+ tree->opval.val->etype = newIntLink ();
+ tree->opval.val->sym->type =
+ tree->opval.val->sym->etype = newIntLink ();
+ }
+ }
}
- resolveChildren:
- resolveSymbols (tree->left);
- resolveSymbols (tree->right);
+resolveChildren:
+ resolveSymbols (tree->left);
+ resolveSymbols (tree->right);
- return tree;
+ return tree;
}
-/*-----------------------------------------------------------------*/
-/* setAstLineno - walks a ast tree & sets the line number */
-/*-----------------------------------------------------------------*/
-int setAstLineno ( ast *tree, int lineno)
+/*------------------------------------------------------------------------*/
+/* setAstFileLine - walks a ast tree & sets the file name and line number */
+/*------------------------------------------------------------------------*/
+int setAstFileLine (ast * tree, char *filename, int lineno)
{
- if (!tree)
- return 0;
-
- tree->lineno = lineno ;
- setAstLineno ( tree->left, lineno);
- setAstLineno ( tree->right, lineno);
+ if (!tree)
return 0;
-}
-#if 0
-/* this functions seems to be superfluous?! kmh */
+ tree->filename = filename;
+ tree->lineno = lineno;
+ setAstFileLine (tree->left, filename, lineno);
+ setAstFileLine (tree->right, filename, lineno);
+ return 0;
+}
/*-----------------------------------------------------------------*/
-/* resolveFromTable - will return the symbal table value */
+/* funcOfType :- function of type with name */
/*-----------------------------------------------------------------*/
-value *resolveFromTable (value *val)
+symbol *
+funcOfType (char *name, sym_link * type, sym_link * argType,
+ int nArgs, int rent)
{
- symbol *csym ;
-
- if (!val->sym)
- return val;
-
- csym = findSymWithLevel (SymbolTab,val->sym);
-
- /* if found in the symbol table & they r not the same */
- if (csym && val->sym != csym &&
- csym->level == val->sym->level &&
- csym->_isparm &&
- !csym->ismyparm) {
+ symbol *sym;
+ /* create the symbol */
+ sym = newSymbol (name, 0);
+
+ /* setup return value */
+ sym->type = newLink (DECLARATOR);
+ DCL_TYPE (sym->type) = FUNCTION;
+ sym->type->next = copyLinkChain (type);
+ sym->etype = getSpec (sym->type);
+ FUNC_ISREENT(sym->type) = rent ? 1 : 0;
+
+ /* if arguments required */
+ if (nArgs)
+ {
+ value *args;
+ args = FUNC_ARGS(sym->type) = newValue ();
- val->sym = csym ;
- val->type = csym->type;
- val->etype = csym->etype;
+ while (nArgs--)
+ {
+ args->type = copyLinkChain (argType);
+ args->etype = getSpec (args->type);
+ SPEC_EXTR(args->etype)=1;
+ if (!nArgs)
+ break;
+ args = args->next = newValue ();
+ }
}
- return val;
+ /* save it */
+ addSymChain (&sym);
+ sym->cdef = 1;
+ allocVariables (sym);
+ return sym;
+
}
-#endif
/*-----------------------------------------------------------------*/
-/* funcOfType :- function of type with name */
+/* funcOfTypeVarg :- function of type with name and argtype */
/*-----------------------------------------------------------------*/
-symbol *funcOfType (char *name, sym_link *type, sym_link *argType,
- int nArgs , int rent)
+symbol *
+funcOfTypeVarg (char *name, char * rtype, int nArgs , char **atypes)
{
+
symbol *sym;
- int argStack = 0;
+ int i ;
/* create the symbol */
- sym = newSymbol (name,0);
+ sym = newSymbol (name, 0);
+
+ /* setup return value */
+ sym->type = newLink (DECLARATOR);
+ DCL_TYPE (sym->type) = FUNCTION;
+ sym->type->next = typeFromStr(rtype);
+ sym->etype = getSpec (sym->type);
/* if arguments required */
if (nArgs) {
-
- value *args ;
- args = sym->args = newValue();
-
- while (nArgs--) {
- argStack += getSize(type);
- args->type = copyLinkChain(argType);
- args->etype = getSpec(args->type);
- if (!nArgs)
- break;
- args = args->next = newValue();
- }
+ value *args;
+ args = FUNC_ARGS(sym->type) = newValue ();
+
+ for ( i = 0 ; i < nArgs ; i++ ) {
+ args->type = typeFromStr(atypes[i]);
+ args->etype = getSpec (args->type);
+ SPEC_EXTR(args->etype)=1;
+ if ((i + 1) == nArgs) break;
+ args = args->next = newValue ();
+ }
}
- /* setup return value */
- sym->type = newLink();
- DCL_TYPE(sym->type) = FUNCTION;
- sym->type->next = copyLinkChain(type);
- sym->etype = getSpec(sym->type);
- SPEC_RENT(sym->etype) = rent;
-
/* save it */
- addSymChain(sym);
+ addSymChain (&sym);
sym->cdef = 1;
- sym->argStack = (rent ? argStack : 0);
allocVariables (sym);
return sym;
/*-----------------------------------------------------------------*/
/* reverseParms - will reverse a parameter tree */
/*-----------------------------------------------------------------*/
-void reverseParms (ast *ptree)
+static void
+reverseParms (ast * ptree)
{
- ast *ttree;
- if (!ptree)
- return ;
+ ast *ttree;
+ if (!ptree)
+ return;
+
+ /* top down if we find a nonParm tree then quit */
+ if (ptree->type == EX_OP && ptree->opval.op == PARAM && !ptree->reversed)
+ {
+ /* The various functions expect the parameter tree to be right heavy. */
+ /* Rotate the tree to be left heavy so that after reversal it is */
+ /* right heavy again. */
+ while ((ttree = ptree->right) && ttree->type == EX_OP &&
+ ttree->opval.op == PARAM)
+ {
+ ptree->right = ttree->right;
+ ttree->right = ttree->left;
+ ttree->left = ptree->left;
+ ptree->left = ttree;
+ }
- /* top down if we find a nonParm tree then quit */
- if (ptree->type == EX_OP && ptree->opval.op == PARAM ) {
- ttree = ptree->left;
- ptree->left = ptree->right;
- ptree->right = ttree;
- reverseParms(ptree->left);
- reverseParms(ptree->right);
+ /* Now reverse */
+ ttree = ptree->left;
+ ptree->left = ptree->right;
+ ptree->right = ttree;
+ ptree->reversed = 1;
+ reverseParms (ptree->left);
+ reverseParms (ptree->right);
}
- return ;
+ return;
}
/*-----------------------------------------------------------------*/
/* processParms - makes sure the parameters are okay and do some */
/* processing with them */
/*-----------------------------------------------------------------*/
-int processParms (ast *func,
- value *defParm,
- ast *actParm,
- int *parmNumber,
- bool rightmost)
+static int
+processParms (ast *func,
+ value *defParm,
+ ast **actParm,
+ int *parmNumber, /* unused, although updated */
+ bool rightmost)
{
- sym_link *fetype = func->etype;
+ RESULT_TYPE resultType;
+ sym_link *functype;
- /* if none of them exist */
- if ( !defParm && !actParm)
- return 0;
+ /* if none of them exist */
+ if (!defParm && !*actParm)
+ return 0;
- /* if the function is being called via a pointer & */
- /* it has not been defined a reentrant then we cannot*/
- /* have parameters */
- if (func->type != EX_VALUE && !IS_RENT(fetype) && !options.stackAuto) {
- werror (E_NONRENT_ARGS);
- return 1;
+ if (defParm)
+ {
+ if (getenv("DEBUG_SANITY"))
+ {
+ fprintf (stderr, "processParms: %s ", defParm->name);
+ }
+ /* make sure the type is complete and sane */
+ checkTypeSanity(defParm->etype, defParm->name);
}
- /* if defined parameters ended but actual parameters */
- /* exist and this is not defined as a variable arg */
- /* also check if statckAuto option is specified */
- if ((! defParm) && actParm && (!func->hasVargs ) &&
- !options.stackAuto && !IS_RENT(fetype)) {
- werror(E_TOO_MANY_PARMS);
- return 1;
+ if (IS_CODEPTR (func->ftype))
+ functype = func->ftype->next;
+ else
+ functype = func->ftype;
+
+ /* if the function is being called via a pointer & */
+ /* it has not been defined reentrant then we cannot */
+ /* have parameters */
+ /* PIC16 port can... */
+ if (!TARGET_IS_PIC16)
+ {
+ if (func->type != EX_VALUE && !IFFUNC_ISREENT (functype) && !options.stackAuto)
+ {
+ werror (E_NONRENT_ARGS);
+ fatalError++;
+ return 1;
+ }
}
- /* if defined parameters present but no actual parameters */
- if ( defParm && ! actParm) {
- werror(E_TOO_FEW_PARMS);
+ /* if defined parameters ended but actual parameters */
+ /* exist and this is not defined as a variable arg */
+ if (!defParm && *actParm && !IFFUNC_HASVARARGS(functype))
+ {
+ werror (E_TOO_MANY_PARMS);
return 1;
}
- /* If this is a varargs function... */
- if (!defParm && actParm && func->hasVargs )
+ /* if defined parameters present but no actual parameters */
+ if (defParm && !*actParm)
{
- ast *newType = NULL;
+ werror (E_TOO_FEW_PARMS);
+ return 1;
+ }
- if (IS_CAST_OP(actParm)
- || (IS_AST_LIT_VALUE(actParm) && actParm->values.literalFromCast))
- {
- /* Parameter was explicitly typecast; don't touch it. */
- return 0;
- }
+ /* if this is a PARAM node then match left & right */
+ if ((*actParm)->type == EX_OP && (*actParm)->opval.op == PARAM)
+ {
+ (*actParm)->decorated = 1;
+ return (processParms (func, defParm,
+ &(*actParm)->left, parmNumber, FALSE) ||
+ processParms (func, defParm ? defParm->next : NULL,
+ &(*actParm)->right, parmNumber, rightmost));
+ }
+ else if (defParm) /* not vararg */
+ {
+ /* If we have found a value node by following only right-hand links,
+ * then we know that there are no more values after us.
+ *
+ * Therefore, if there are more defined parameters, the caller didn't
+ * supply enough.
+ */
+ if (rightmost && defParm->next)
+ {
+ werror (E_TOO_FEW_PARMS);
+ return 1;
+ }
+ }
+
+ /* decorate parameter */
+ resultType = defParm ? getResultTypeFromType (defParm->type) :
+ RESULT_TYPE_NONE;
+ *actParm = decorateType (*actParm, resultType);
+
+ if (IS_VOID((*actParm)->ftype))
+ {
+ werror (E_VOID_VALUE_USED);
+ return 1;
+ }
+
+ /* If this is a varargs function... */
+ if (!defParm && *actParm && IFFUNC_HASVARARGS(functype))
+ {
+ ast *newType = NULL;
+ sym_link *ftype;
+
+ /* don't perform integer promotion of explicitly typecasted variable arguments
+ * if sdcc extensions are enabled */
+ if (options.std_sdcc &&
+ (IS_CAST_OP (*actParm) ||
+ (IS_AST_SYM_VALUE (*actParm) && AST_VALUES (*actParm, removedCast)) ||
+ (IS_AST_LIT_VALUE (*actParm) && AST_VALUES (*actParm, literalFromCast))))
+ {
+ /* Parameter was explicitly typecast; don't touch it. */
+ return 0;
+ }
+
+ ftype = (*actParm)->ftype;
- /* If it's a small integer, upcast to int. */
- if (IS_INTEGRAL(actParm->ftype)
- && getSize(actParm->ftype) < (unsigned) INTSIZE)
+ /* If it's a char, upcast to int. */
+ if (IS_INTEGRAL (ftype)
+ && (getSize (ftype) < (unsigned) INTSIZE))
{
- newType = newAst_LINK(INTTYPE);
+ newType = newAst_LINK(INTTYPE);
}
- if (IS_PTR(actParm->ftype) && !IS_GENPTR(actParm->ftype))
+ if (IS_PTR(ftype) && !IS_GENPTR(ftype))
{
- newType = newAst_LINK(copyLinkChain(actParm->ftype));
- DCL_TYPE(newType->opval.lnk) = GPOINTER;
+ newType = newAst_LINK (copyLinkChain(ftype));
+ DCL_TYPE (newType->opval.lnk) = port->unqualified_pointer;
}
- if (IS_AGGREGATE(actParm->ftype))
+ if (IS_AGGREGATE (ftype))
{
- newType = newAst_LINK(copyLinkChain(actParm->ftype));
- DCL_TYPE(newType->opval.lnk) = GPOINTER;
+ newType = newAst_LINK (copyLinkChain (ftype));
+ DCL_TYPE (newType->opval.lnk) = port->unqualified_pointer;
}
- if (newType)
+ if (newType)
{
/* cast required; change this op to a cast. */
- ast *parmCopy = resolveSymbols(copyAst(actParm));
+ (*actParm)->decorated = 0;
+ *actParm = newNode (CAST, newType, *actParm);
+ (*actParm)->filename = (*actParm)->right->filename;
+ (*actParm)->lineno = (*actParm)->right->lineno;
- actParm->type = EX_OP;
- actParm->opval.op = CAST;
- actParm->left = newType;
- actParm->right= parmCopy;
- decorateType(actParm);
+ decorateType (*actParm, RESULT_TYPE_NONE);
}
- else if ( actParm->type == EX_OP && actParm->opval.op == PARAM)
- {
- return (processParms(func,NULL,actParm->left,parmNumber,FALSE) ||
- processParms(func,NULL,actParm->right,parmNumber,rightmost));
- }
- return 0;
- }
+ return 0;
+ } /* vararg */
- /* if defined parameters ended but actual has not & */
- /* stackAuto */
- if (! defParm && actParm &&
- (options.stackAuto || IS_RENT(fetype)))
- return 0;
+ /* if defined parameters ended but actual has not & */
+ /* reentrant */
+ if (!defParm && *actParm &&
+ (options.stackAuto || IFFUNC_ISREENT (functype)))
+ return 0;
+
+ resolveSymbols (*actParm);
- resolveSymbols(actParm);
- /* if this is a PARAM node then match left & right */
- if ( actParm->type == EX_OP && actParm->opval.op == PARAM)
+ /* the parameter type must be at least castable */
+ if (compareType (defParm->type, (*actParm)->ftype) == 0)
{
- return (processParms(func,defParm,actParm->left,parmNumber,FALSE) ||
- processParms(func,defParm->next, actParm->right,parmNumber,rightmost));
+ werror (E_INCOMPAT_TYPES);
+ printFromToType ((*actParm)->ftype, defParm->type);
+ return 1;
}
- else
+
+ /* if the parameter is castable then add the cast */
+ if (compareType (defParm->type, (*actParm)->ftype) < 0)
{
- /* If we have found a value node by following only right-hand links,
- * then we know that there are no more values after us.
- *
- * Therefore, if there are more defined parameters, the caller didn't
- * supply enough.
- */
- if (rightmost && defParm->next)
- {
- werror(E_TOO_FEW_PARMS);
- return 1;
- }
- }
-
- /* the parameter type must be at least castable */
- if (checkType(defParm->type,actParm->ftype) == 0) {
- werror(E_TYPE_MISMATCH_PARM,*parmNumber);
- werror(E_CONTINUE,"defined type ");
- printTypeChain(defParm->type,stderr);fprintf(stderr,"\n");
- werror(E_CONTINUE,"actual type ");
- printTypeChain(actParm->ftype,stderr);fprintf(stderr,"\n");
+ ast *pTree;
+
+ resultType = getResultTypeFromType (defParm->etype);
+ pTree = resolveSymbols (copyAst (*actParm));
+
+ /* now change the current one to a cast */
+ (*actParm)->type = EX_OP;
+ (*actParm)->opval.op = CAST;
+ (*actParm)->left = newAst_LINK (defParm->type);
+ (*actParm)->right = pTree;
+ (*actParm)->decorated = 0; /* force typechecking */
+ decorateType (*actParm, IS_GENPTR (defParm->type) ? RESULT_TYPE_GPTR : resultType);
}
- /* if the parameter is castable then add the cast */
- if ( checkType (defParm->type,actParm->ftype) < 0) {
- ast *pTree = resolveSymbols(copyAst(actParm));
+ /* make a copy and change the regparm type to the defined parm */
+ (*actParm)->etype = getSpec ((*actParm)->ftype = copyLinkChain ((*actParm)->ftype));
+ SPEC_REGPARM ((*actParm)->etype) = SPEC_REGPARM (defParm->etype);
+ SPEC_ARGREG ((*actParm)->etype) = SPEC_ARGREG (defParm->etype);
- /* now change the current one to a cast */
- actParm->type = EX_OP ;
- actParm->opval.op = CAST ;
- actParm->left = newAst_LINK(defParm->type);
- actParm->right= pTree ;
- actParm->etype= defParm->etype;
- actParm->ftype= defParm->type;
+ /* if the function is being called via a pointer & */
+ /* this parameter is not passed in registers */
+ /* then the function must be defined reentrant */
+ if (IS_FUNCPTR (func->ftype) && !SPEC_REGPARM ((*actParm)->etype) &&
+ !IFFUNC_ISREENT (functype) && !options.stackAuto)
+ {
+ werror (E_NONRENT_ARGS);
+ fatalError++;
+ return 1;
}
-/* actParm->argSym = resolveFromTable(defParm)->sym ; */
-
- actParm->argSym = defParm->sym;
- /* make a copy and change the regparm type to the defined parm */
- actParm->etype = getSpec(actParm->ftype = copyLinkChain(actParm->ftype));
- SPEC_REGPARM(actParm->etype) = SPEC_REGPARM(defParm->etype);
- (*parmNumber)++;
- return 0;
+ (*parmNumber)++;
+ return 0;
}
+
/*-----------------------------------------------------------------*/
/* createIvalType - generates ival for basic types */
/*-----------------------------------------------------------------*/
-ast *createIvalType ( ast *sym,sym_link *type, initList *ilist)
+static ast *
+createIvalType (ast * sym, sym_link * type, initList * ilist)
{
- ast *iExpr;
+ ast *iExpr;
- /* if initList is deep */
- if ( ilist->type == INIT_DEEP )
- ilist = ilist->init.deep ;
+ /* if initList is deep */
+ if (ilist && ilist->type == INIT_DEEP)
+ ilist = ilist->init.deep;
- iExpr = decorateType(resolveSymbols(list2expr(ilist)));
- return decorateType(newNode('=',sym,iExpr));
+ if (ilist)
+ iExpr = decorateType (resolveSymbols (list2expr (ilist)), RESULT_TYPE_NONE);
+ else
+ iExpr = newAst_VALUE (valueFromLit (0));
+ return decorateType (newNode ('=', sym, iExpr), RESULT_TYPE_NONE);
}
/*-----------------------------------------------------------------*/
/* createIvalStruct - generates initial value for structures */
/*-----------------------------------------------------------------*/
-ast *createIvalStruct (ast *sym,sym_link *type,initList *ilist)
+static ast *
+createIvalStruct (ast *sym, sym_link *type, initList *ilist, ast *rootValue)
{
- ast *rast = NULL ;
- symbol *sflds ;
- initList *iloop ;
+ ast *rast = NULL;
+ ast *lAst;
+ symbol *sflds;
+ initList *iloop;
+ sym_link * etype = getSpec (type);
- sflds = SPEC_STRUCT(type)->fields ;
- if (ilist->type != INIT_DEEP) {
- werror(E_INIT_STRUCT,"");
- return NULL ;
+ if (ilist && ilist->type != INIT_DEEP)
+ {
+ werror (E_INIT_STRUCT, "");
+ return NULL;
}
- iloop = ilist->init.deep;
+ iloop = ilist ? ilist->init.deep : NULL;
- for ( ; sflds ; sflds = sflds->next, iloop = (iloop ? iloop->next : NULL )) {
- ast *lAst ;
+ for (sflds = SPEC_STRUCT (type)->fields; sflds; sflds = sflds->next)
+ {
+ /* if we have come to end */
+ if (!iloop && (!AST_SYMBOL (rootValue)->islocal || SPEC_STAT (etype)))
+ break;
- /* if we have come to end */
- if (!iloop)
- break;
- sflds->implicit = 1;
- lAst = newNode(PTR_OP,newNode('&',sym,NULL),newAst_VALUE(symbolVal(sflds)));
- lAst = decorateType(resolveSymbols(lAst));
- rast = decorateType(resolveSymbols(createIval (lAst, sflds->type, iloop,rast)));
+ if (!IS_BITFIELD (sflds->type) || !SPEC_BUNNAMED (sflds->etype))
+ {
+ sflds->implicit = 1;
+ lAst = newNode (PTR_OP, newNode ('&', sym, NULL), newAst_VALUE (symbolVal (sflds)));
+ lAst = decorateType (resolveSymbols (lAst), RESULT_TYPE_NONE);
+ rast = decorateType (resolveSymbols (createIval (lAst, sflds->type, iloop, rast, rootValue)), RESULT_TYPE_NONE);
+ iloop = iloop ? iloop->next : NULL;
+ }
+ }
+
+ if (iloop)
+ {
+ if (IS_AST_VALUE (sym))
+ werrorfl (sym->opval.val->sym->fileDef, sym->opval.val->sym->lineDef,
+ W_EXCESS_INITIALIZERS, "struct",
+ sym->opval.val->sym->name);
+ else
+ werrorfl (sym->filename, sym->lineno, E_INIT_COUNT);
}
- return rast ;
-}
+ return rast;
+}
/*-----------------------------------------------------------------*/
/* createIvalArray - generates code for array initialization */
/*-----------------------------------------------------------------*/
-ast *createIvalArray (ast *sym, sym_link *type, initList *ilist)
+static ast *
+createIvalArray (ast * sym, sym_link * type, initList * ilist, ast *rootValue)
{
- ast *rast = NULL;
- initList *iloop ;
- int lcnt = 0, size =0 ;
-
- /* take care of the special case */
- /* array of characters can be init */
- /* by a string */
- if ( IS_CHAR(type->next) )
- if ( (rast = createIvalCharPtr(sym,
- type,
- decorateType(resolveSymbols(list2expr(ilist))))))
+ ast *rast = NULL;
+ initList *iloop;
+ int lcnt = 0, size = 0;
+ literalList *literalL;
+ sym_link * etype = getSpec (type);
+
+ /* take care of the special case */
+ /* array of characters can be init */
+ /* by a string */
+ if (IS_CHAR (type->next))
+ if ((rast = createIvalCharPtr (sym,
+ type,
+ decorateType (resolveSymbols (list2expr (ilist)), RESULT_TYPE_NONE),
+ rootValue)))
+
+ return decorateType (resolveSymbols (rast), RESULT_TYPE_NONE);
+
+ /* not the special case */
+ if (ilist && ilist->type != INIT_DEEP)
+ {
+ werror (E_INIT_STRUCT, "");
+ return NULL;
+ }
- return decorateType(resolveSymbols(rast));
+ iloop = ilist ? ilist->init.deep : NULL;
+ lcnt = DCL_ELEM (type);
- /* not the special case */
- if (ilist->type != INIT_DEEP) {
- werror(E_INIT_STRUCT,"");
- return NULL;
+ if (!iloop &&
+ (!lcnt || !DCL_ELEM (type) || !AST_SYMBOL (rootValue)->islocal || SPEC_STAT (etype)))
+ {
+ return NULL;
}
- iloop = ilist->init.deep ;
- lcnt = DCL_ELEM(type);
+ if (port->arrayInitializerSuppported && convertIListToConstList(ilist, &literalL, lcnt))
+ {
+ ast *aSym;
- for (;;) {
- ast *aSym ;
- size++ ;
+ aSym = decorateType (resolveSymbols(sym), RESULT_TYPE_NONE);
- aSym = newNode('[',sym,newAst_VALUE(valueFromLit((float) (size-1))));
- aSym = decorateType(resolveSymbols(aSym));
- rast = createIval (aSym,type->next,iloop,rast) ;
- iloop = (iloop ? iloop->next : NULL) ;
- if (!iloop)
- break;
- /* if not array limits given & we */
- /* are out of initialisers then */
- if (!DCL_ELEM(type) && !iloop)
- break ;
+ rast = newNode(ARRAYINIT, aSym, NULL);
+ rast->values.constlist = literalL;
+
+ // Make sure size is set to length of initializer list.
+ while (iloop)
+ {
+ size++;
+ iloop = iloop->next;
+ }
- /* no of elements given and we */
- /* have generated for all of them */
- if (!--lcnt)
- break ;
+ if (lcnt && size > lcnt)
+ {
+ // Array size was specified, and we have more initializers than needed.
+ werrorfl (sym->opval.val->sym->fileDef, sym->opval.val->sym->lineDef,
+ W_EXCESS_INITIALIZERS, "array", sym->opval.val->sym->name);
+ }
+ }
+ else
+ {
+ for (;;)
+ {
+ ast *aSym;
+
+ if (!iloop &&
+ (!lcnt || !DCL_ELEM (type) || !AST_SYMBOL (rootValue)->islocal || SPEC_STAT (etype)))
+ {
+ break;
+ }
+
+ aSym = newNode ('[', sym, newAst_VALUE (valueFromLit ((float) (size++))));
+ aSym = decorateType (resolveSymbols (aSym), RESULT_TYPE_NONE);
+ rast = createIval (aSym, type->next, iloop, rast, rootValue);
+ lcnt--;
+ iloop = (iloop ? iloop->next : NULL);
+
+ /* no of elements given and we */
+ /* have generated for all of them */
+ if (!lcnt && iloop)
+ {
+ // is this a better way? at least it won't crash
+ char *name = (IS_AST_SYM_VALUE(sym)) ? AST_SYMBOL(sym)->name : "";
+ werrorfl (iloop->filename, iloop->lineno, W_EXCESS_INITIALIZERS, "array", name);
+
+ break;
+ }
+ }
}
- /* if we have not been given a size */
- if (!DCL_ELEM(type))
- DCL_ELEM(type) = size;
+ /* if we have not been given a size */
+ if (!DCL_ELEM (type))
+ {
+ /* check, if it's a flexible array */
+ if (IS_STRUCT (AST_VALUE (rootValue)->type))
+ AST_SYMBOL(rootValue)->flexArrayLength = size * getSize (type->next);
+ else
+ DCL_ELEM (type) = size;
+ }
- return decorateType(resolveSymbols(rast));
+ return decorateType (resolveSymbols (rast), RESULT_TYPE_NONE);
}
/*-----------------------------------------------------------------*/
/* createIvalCharPtr - generates initial values for char pointers */
/*-----------------------------------------------------------------*/
-ast *createIvalCharPtr (ast *sym, sym_link *type, ast *iexpr)
-{
- ast *rast = NULL ;
-
- /* if this is a pointer & right is a literal array then */
- /* just assignment will do */
- if ( IS_PTR(type) && (( IS_LITERAL(iexpr->etype) ||
- SPEC_SCLS(iexpr->etype) == S_CODE )
- && IS_ARRAY(iexpr->ftype)))
- return newNode('=',sym,iexpr);
-
- /* left side is an array so we have to assign each */
- /* element */
- if (( IS_LITERAL(iexpr->etype) ||
- SPEC_SCLS(iexpr->etype) == S_CODE )
- && IS_ARRAY(iexpr->ftype)) {
-
- /* for each character generate an assignment */
- /* to the array element */
- char *s = SPEC_CVAL(iexpr->etype).v_char ;
- int i = 0 ;
-
- while (*s) {
- rast = newNode(NULLOP,
- rast,
- newNode('=',
- newNode('[', sym,
- newAst_VALUE(valueFromLit((float) i))),
- newAst_VALUE(valueFromLit(*s))));
- i++;
- s++;
- }
- rast = newNode(NULLOP,
- rast,
- newNode('=',
- newNode('[', sym,
- newAst_VALUE(valueFromLit((float) i))),
- newAst_VALUE(valueFromLit(*s))));
- return decorateType(resolveSymbols(rast));
+static ast *
+createIvalCharPtr (ast * sym, sym_link * type, ast * iexpr, ast *rootVal)
+{
+ ast *rast = NULL;
+ unsigned size = 0;
+
+ /* if this is a pointer & right is a literal array then */
+ /* just assignment will do */
+ if (IS_PTR (type) && ((IS_LITERAL (iexpr->etype) ||
+ SPEC_SCLS (iexpr->etype) == S_CODE)
+ && IS_ARRAY (iexpr->ftype)))
+ return newNode ('=', sym, iexpr);
+
+ /* left side is an array so we have to assign each element */
+ if (!iexpr)
+ {
+ /* for each character generate an assignment */
+ /* to the array element */
+ unsigned int i = 0;
+ unsigned int symsize = getSize (type);
+
+ if (!AST_SYMBOL (rootVal)->islocal || SPEC_STAT (getSpec (type)))
+ return NULL;
+
+ for (i = 0; i < symsize; ++i)
+ {
+ rast = newNode (NULLOP,
+ rast,
+ newNode ('=',
+ newNode ('[', sym,
+ newAst_VALUE (valueFromLit ((float) i))),
+ newAst_VALUE (valueFromLit (0))));
+ }
+
+ return decorateType (resolveSymbols (rast), RESULT_TYPE_NONE);
+ }
+
+ if ((IS_LITERAL (iexpr->etype) ||
+ SPEC_SCLS (iexpr->etype) == S_CODE)
+ && IS_ARRAY (iexpr->ftype))
+ {
+ /* for each character generate an assignment */
+ /* to the array element */
+ char *s = SPEC_CVAL (iexpr->etype).v_char;
+ unsigned int i = 0;
+ unsigned int symsize = getSize (type);
+
+ size = getSize (iexpr->ftype);
+ if (symsize && size > symsize)
+ {
+ if (size > symsize)
+ {
+ char *name = (IS_AST_SYM_VALUE(sym)) ? AST_SYMBOL(sym)->name : "";
+
+ werrorfl (iexpr->filename, iexpr->lineno, W_EXCESS_INITIALIZERS,
+ "string", name);
+ }
+ size = symsize;
+ }
+
+ for (i = 0; i < size; i++)
+ {
+ rast = newNode (NULLOP,
+ rast,
+ newNode ('=',
+ newNode ('[', sym,
+ newAst_VALUE (valueFromLit ((float) i))),
+ newAst_VALUE (valueFromLit (*s++))));
+ }
+
+ // now WE don't need iexpr's symbol anymore
+ freeStringSymbol(AST_SYMBOL(iexpr));
+
+ /* if we have not been given a size */
+ if (!DCL_ELEM (type))
+ {
+ /* check, if it's a flexible array */
+ if (IS_STRUCT (AST_VALUE (rootVal)->type))
+ AST_SYMBOL(rootVal)->flexArrayLength = size * getSize (type->next);
+ else
+ DCL_ELEM (type) = size;
+ }
+
+ return decorateType (resolveSymbols (rast), RESULT_TYPE_NONE);
}
- return NULL ;
+ return NULL;
}
/*-----------------------------------------------------------------*/
/* createIvalPtr - generates initial value for pointers */
/*-----------------------------------------------------------------*/
-ast *createIvalPtr (ast *sym,sym_link *type,initList *ilist)
+static ast *
+createIvalPtr (ast * sym, sym_link * type, initList * ilist, ast *rootVal)
{
- ast *rast;
- ast *iexpr ;
+ ast *rast;
+ ast *iexpr;
- /* if deep then */
- if ( ilist->type == INIT_DEEP )
- ilist = ilist->init.deep ;
+ /* if deep then */
+ if (ilist && ilist->type == INIT_DEEP)
+ ilist = ilist->init.deep;
- iexpr = decorateType(resolveSymbols(list2expr(ilist)));
+ iexpr = decorateType (resolveSymbols (list2expr (ilist)), RESULT_TYPE_NONE);
- /* if character pointer */
- if (IS_CHAR(type->next))
- if ((rast = createIvalCharPtr (sym,type,iexpr)))
+ /* if character pointer */
+ if (IS_CHAR (type->next))
+ if ((rast = createIvalCharPtr (sym, type, iexpr, rootVal)))
return rast;
- return newNode('=',sym,iexpr);
+ return newNode ('=', sym, iexpr);
}
/*-----------------------------------------------------------------*/
/* createIval - generates code for initial value */
/*-----------------------------------------------------------------*/
-ast *createIval (ast *sym, sym_link *type, initList *ilist, ast *wid)
+static ast *
+createIval (ast * sym, sym_link * type, initList * ilist, ast * wid, ast *rootValue)
{
- ast *rast = NULL;
+ ast *rast = NULL;
- if (!ilist)
- return NULL ;
+ if (!ilist && (!AST_SYMBOL (rootValue)->islocal || SPEC_STAT (getSpec (type))))
+ return NULL;
- /* if structure then */
- if (IS_STRUCT(type))
- rast = createIvalStruct(sym, type,ilist);
- else
- /* if this is a pointer */
- if (IS_PTR(type))
- rast = createIvalPtr(sym, type,ilist);
+ /* if structure then */
+ if (IS_STRUCT (type))
+ rast = createIvalStruct (sym, type, ilist, rootValue);
+ else
+ /* if this is a pointer */
+ if (IS_PTR (type))
+ rast = createIvalPtr (sym, type, ilist, rootValue);
+ else
+ /* if this is an array */
+ if (IS_ARRAY (type))
+ rast = createIvalArray (sym, type, ilist, rootValue);
else
- /* if this is an array */
- if (IS_ARRAY(type))
- rast = createIvalArray(sym, type,ilist);
- else
/* if type is SPECIFIER */
- if (IS_SPEC(type))
- rast = createIvalType (sym,type,ilist);
- if ( wid )
- return decorateType(resolveSymbols(newNode(NULLOP,wid,rast)));
- else
- return decorateType(resolveSymbols(rast)) ;
+ if (IS_SPEC (type))
+ rast = createIvalType (sym, type, ilist);
+
+ if (wid)
+ return decorateType (resolveSymbols (newNode (NULLOP, wid, rast)), RESULT_TYPE_NONE);
+ else
+ return decorateType (resolveSymbols (rast), RESULT_TYPE_NONE);
}
/*-----------------------------------------------------------------*/
/* initAggregates - initialises aggregate variables with initv */
/*-----------------------------------------------------------------*/
-ast *initAggregates ( symbol *sym, initList *ival, ast *wid)
+ast * initAggregates (symbol * sym, initList * ival, ast * wid)
{
- return createIval (newAst_VALUE(symbolVal(sym)),sym->type,ival,wid);
+ ast *newAst = newAst_VALUE (symbolVal (sym));
+ return createIval (newAst, sym->type, ival, wid, newAst);
}
/*-----------------------------------------------------------------*/
/* gatherAutoInit - creates assignment expressions for initial */
-/* values */
+/* values */
/*-----------------------------------------------------------------*/
-ast *gatherAutoInit ( symbol *autoChain )
+static ast *
+gatherAutoInit (symbol * autoChain)
{
- ast *init = NULL ;
- ast *work ;
- symbol *sym;
+ ast *init = NULL;
+ ast *work;
+ symbol *sym;
- inInitMode =1;
- for ( sym = autoChain ; sym ; sym = sym->next ) {
-
- /* resolve the symbols in the ival */
- if (sym->ival)
- resolveIvalSym(sym->ival);
-
- /* if this is a static variable & has an */
- /* initial value the code needs to be lifted */
- /* here to the main portion since they can be */
- /* initialised only once at the start */
- if ( IS_STATIC(sym->etype) && sym->ival &&
- SPEC_SCLS(sym->etype) != S_CODE) {
- symbol *newSym ;
-
- /* insert the symbol into the symbol table */
- /* with level = 0 & name = rname */
- newSym = copySymbol (sym);
- addSym (SymbolTab,newSym,newSym->name,0,0);
-
- /* now lift the code to main */
- if (IS_AGGREGATE(sym->type))
- work = initAggregates (sym, sym->ival,NULL);
- else
- work = newNode('=' ,newAst_VALUE(symbolVal(newSym)),
- list2expr(sym->ival));
-
- setAstLineno(work,sym->lineDef);
-
- sym->ival = NULL ;
- if ( staticAutos )
- staticAutos = newNode(NULLOP,staticAutos,work);
- else
- staticAutos = work ;
+ inInitMode = 1;
+ for (sym = autoChain; sym; sym = sym->next)
+ {
+ /* resolve the symbols in the ival */
+ if (sym->ival)
+ resolveIvalSym (sym->ival, sym->type);
+
+#if 1
+ /* if we are PIC16 port,
+ * and this is a static,
+ * and have initial value,
+ * and not S_CODE, don't emit in gs segment,
+ * but allow glue.c:pic16emitRegularMap to put symbol
+ * in idata section */
+ if(TARGET_IS_PIC16 &&
+ IS_STATIC (sym->etype) && sym->ival
+ && SPEC_SCLS(sym->etype) != S_CODE) {
+ SPEC_SCLS (sym->etype) = S_DATA;
+ continue;
+ }
+#endif
- continue;
- }
+ /* if this is a static variable & has an */
+ /* initial value the code needs to be lifted */
+ /* here to the main portion since they can be */
+ /* initialised only once at the start */
+ if (IS_STATIC (sym->etype) && sym->ival &&
+ SPEC_SCLS (sym->etype) != S_CODE)
+ {
+ symbol *newSym;
+
+ /* insert the symbol into the symbol table */
+ /* with level = 0 & name = rname */
+ newSym = copySymbol (sym);
+ addSym (SymbolTab, newSym, newSym->rname, 0, 0, 1);
+
+ /* now lift the code to main */
+ if (IS_AGGREGATE (sym->type)) {
+ work = initAggregates (sym, sym->ival, NULL);
+ } else {
+ if (getNelements(sym->type, sym->ival)>1) {
+ werrorfl (sym->fileDef, sym->lineDef,
+ W_EXCESS_INITIALIZERS, "scalar",
+ sym->name);
+ }
+ work = newNode ('=', newAst_VALUE (symbolVal (newSym)),
+ list2expr (sym->ival));
+ }
+
+ setAstFileLine (work, sym->fileDef, sym->lineDef);
+
+ sym->ival = NULL;
+ if (staticAutos)
+ staticAutos = newNode (NULLOP, staticAutos, work);
+ else
+ staticAutos = work;
+
+ continue;
+ }
- /* if there is an initial value */
- if ( sym->ival && SPEC_SCLS(sym->etype)!=S_CODE) {
- if (IS_AGGREGATE(sym->type))
- work = initAggregates (sym,sym->ival,NULL);
- else
- work = newNode('=' ,newAst_VALUE(symbolVal(sym)),
- list2expr(sym->ival));
+ /* if there is an initial value */
+ if (sym->ival && SPEC_SCLS (sym->etype) != S_CODE)
+ {
+ initList *ilist = sym->ival;
+
+ while (ilist->type == INIT_DEEP)
+ {
+ ilist = ilist->init.deep;
+ }
+
+ /* update lineno for error msg */
+ filename = sym->fileDef;
+ lineno = sym->lineDef;
+ setAstFileLine (ilist->init.node, sym->fileDef, sym->lineDef);
+
+ if (IS_AGGREGATE (sym->type))
+ {
+ work = initAggregates (sym, sym->ival, NULL);
+ }
+ else
+ {
+ if (getNelements(sym->type, sym->ival)>1)
+ {
+ werrorfl (sym->fileDef, sym->lineDef,
+ W_EXCESS_INITIALIZERS, "scalar",
+ sym->name);
+ }
+ work = newNode ('=', newAst_VALUE (symbolVal (sym)),
+ list2expr (sym->ival));
+ }
+
+ // just to be sure
+ setAstFileLine (work, sym->fileDef, sym->lineDef);
+
+ sym->ival = NULL;
+ if (init)
+ init = newNode (NULLOP, init, work);
+ else
+ init = work;
+ }
+ }
+ inInitMode = 0;
+ return init;
+}
- setAstLineno (work,sym->lineDef);
- sym->ival = NULL ;
- if ( init )
- init = newNode(NULLOP,init,work);
- else
- init = work ;
- }
+/*-----------------------------------------------------------------*/
+/* freeStringSymbol - delete a literal string if no more usage */
+/*-----------------------------------------------------------------*/
+void freeStringSymbol(symbol *sym) {
+ /* make sure this is a literal string */
+ assert (sym->isstrlit);
+ if (--sym->isstrlit == 0) { // lower the usage count
+ memmap *segment=SPEC_OCLS(sym->etype);
+ if (segment) {
+ deleteSetItem(&segment->syms, sym);
}
- inInitMode = 0;
- return init ;
+ }
}
/*-----------------------------------------------------------------*/
/* stringToSymbol - creates a symbol from a literal string */
/*-----------------------------------------------------------------*/
-static value *stringToSymbol (value *val)
+static value *
+stringToSymbol (value * val)
{
- char name[SDCC_NAME_MAX+1];
- static int charLbl = 0;
- symbol *sym ;
-
- sprintf(name,"_str_%d",charLbl++);
- sym = newSymbol(name,0); /* make it @ level 0 */
- strcpy(sym->rname,name);
+ char name[SDCC_NAME_MAX + 1];
+ static int charLbl = 0;
+ symbol *sym;
+ set *sp;
+ unsigned int size;
+
+ // have we heard this before?
+ for (sp = statsg->syms; sp; sp = sp->next)
+ {
+ sym = sp->item;
+ size = getSize (sym->type);
+ if (sym->isstrlit && size == getSize (val->type) &&
+ !memcmp (SPEC_CVAL (sym->etype).v_char, SPEC_CVAL (val->etype).v_char, size))
+ {
+ // yes, this is old news. Don't publish it again.
+ sym->isstrlit++; // but raise the usage count
+ return symbolVal (sym);
+ }
+ }
- /* copy the type from the value passed */
- sym->type = copyLinkChain(val->type);
- sym->etype = getSpec(sym->type);
- /* change to storage class & output class */
- SPEC_SCLS(sym->etype) = S_CODE ;
- SPEC_CVAL(sym->etype).v_char = SPEC_CVAL(val->etype).v_char ;
- SPEC_STAT(sym->etype) = 1;
- /* make the level & block = 0 */
- sym->block = sym->level = 0;
- sym->isstrlit = 1;
- /* create an ival */
- sym->ival = newiList(INIT_NODE,newAst_VALUE(val));
- if (noAlloc == 0) {
- /* allocate it */
- addSymChain(sym);
- allocVariables(sym);
+ SNPRINTF (name, sizeof(name), "_str_%d", charLbl++);
+ sym = newSymbol (name, 0); /* make it @ level 0 */
+ strncpyz (sym->rname, name, SDCC_NAME_MAX);
+
+ /* copy the type from the value passed */
+ sym->type = copyLinkChain (val->type);
+ sym->etype = getSpec (sym->type);
+ /* change to storage class & output class */
+ SPEC_SCLS (sym->etype) = S_CODE;
+ SPEC_CVAL (sym->etype).v_char = SPEC_CVAL (val->etype).v_char;
+ SPEC_STAT (sym->etype) = 1;
+ /* make the level & block = 0 */
+ sym->block = sym->level = 0;
+ sym->isstrlit = 1;
+ /* create an ival */
+ sym->ival = newiList (INIT_NODE, newAst_VALUE (val));
+ if (noAlloc == 0)
+ {
+ /* allocate it */
+ addSymChain (&sym);
+ allocVariables (sym);
}
- sym->ival = NULL;
- return symbolVal(sym);
+ sym->ival = NULL;
+ return symbolVal (sym);
}
/* a block is found then will allocate the syms */
/* will also gather the auto inits present */
/*-----------------------------------------------------------------*/
-ast *processBlockVars ( ast *tree , int *stack, int action)
+ast *
+processBlockVars (ast * tree, int *stack, int action)
{
- if (! tree)
- return NULL ;
+ if (!tree)
+ return NULL;
- /* if this is a block */
- if (tree->type == EX_OP && tree->opval.op == BLOCK ) {
- ast *autoInit ;
+ /* if this is a block */
+ if (tree->type == EX_OP && tree->opval.op == BLOCK)
+ {
+ ast *autoInit;
- if (action == ALLOCATE) {
- autoInit = gatherAutoInit (tree->values.sym);
- *stack += allocVariables (tree->values.sym);
+ if (action == ALLOCATE)
+ {
+ *stack += allocVariables (tree->values.sym);
+ autoInit = gatherAutoInit (tree->values.sym);
- /* if there are auto inits then do them */
- if (autoInit)
- tree->left = newNode(NULLOP,autoInit,tree->left);
- } else /* action is deallocate */
- deallocLocal (tree->values.sym) ;
+ /* if there are auto inits then do them */
+ if (autoInit)
+ tree->left = newNode (NULLOP, autoInit, tree->left);
+ }
+ else /* action is deallocate */
+ deallocLocal (tree->values.sym);
}
- processBlockVars (tree->left, stack, action);
- processBlockVars (tree->right, stack, action);
- return tree ;
+ processBlockVars (tree->left, stack, action);
+ processBlockVars (tree->right, stack, action);
+ return tree;
+}
+
+/*-------------------------------------------------------------*/
+/* constExprTree - returns TRUE if this tree is a constant */
+/* expression */
+/*-------------------------------------------------------------*/
+bool constExprTree (ast *cexpr) {
+
+ if (!cexpr) {
+ return TRUE;
+ }
+
+ cexpr = decorateType (resolveSymbols (cexpr), RESULT_TYPE_NONE);
+
+ switch (cexpr->type)
+ {
+ case EX_VALUE:
+ if (IS_AST_LIT_VALUE(cexpr)) {
+ // this is a literal
+ return TRUE;
+ }
+ if (IS_AST_SYM_VALUE(cexpr) && IS_FUNC(AST_SYMBOL(cexpr)->type)) {
+ // a function's address will never change
+ return TRUE;
+ }
+ if (IS_AST_SYM_VALUE(cexpr) && IS_ARRAY(AST_SYMBOL(cexpr)->type)) {
+ // an array's address will never change
+ return TRUE;
+ }
+ if (IS_AST_SYM_VALUE(cexpr) &&
+ IN_CODESPACE(SPEC_OCLS(AST_SYMBOL(cexpr)->etype))) {
+ // a symbol in code space will never change
+ // This is only for the 'char *s="hallo"' case and will have to leave
+ //printf(" code space symbol");
+ return TRUE;
+ }
+ return FALSE;
+ case EX_LINK:
+ werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "unexpected link in expression tree\n");
+ return FALSE;
+ case EX_OP:
+ if (cexpr->opval.op==ARRAYINIT) {
+ // this is a list of literals
+ return TRUE;
+ }
+ if (cexpr->opval.op=='=') {
+ return constExprTree(cexpr->right);
+ }
+ if (cexpr->opval.op==CAST) {
+ // cast ignored, maybe we should throw a warning here?
+ return constExprTree(cexpr->right);
+ }
+ if (cexpr->opval.op=='&') {
+ return TRUE;
+ }
+ if (cexpr->opval.op==CALL || cexpr->opval.op==PCALL) {
+ return FALSE;
+ }
+ if (constExprTree(cexpr->left) && constExprTree(cexpr->right)) {
+ return TRUE;
+ }
+ return FALSE;
+ case EX_OPERAND:
+ return IS_CONSTANT(operandType(cexpr->opval.oprnd));
+ }
+ return FALSE;
}
/*-----------------------------------------------------------------*/
/* constExprValue - returns the value of a constant expression */
+/* or NULL if it is not a constant expression */
/*-----------------------------------------------------------------*/
-value *constExprValue (ast *cexpr, int check)
-{
- cexpr = decorateType(resolveSymbols(cexpr));
-
- /* if this is not a constant then */
- if (!IS_LITERAL(cexpr->ftype)) {
- /* then check if this is a literal array
- in code segment */
- if (SPEC_SCLS(cexpr->etype) == S_CODE &&
- SPEC_CVAL(cexpr->etype).v_char &&
- IS_ARRAY(cexpr->ftype)) {
- value *val = valFromType(cexpr->ftype);
- SPEC_SCLS(val->etype) = S_LITERAL;
- val->sym =cexpr->opval.val->sym ;
- val->sym->type = copyLinkChain(cexpr->ftype);
- val->sym->etype = getSpec(val->sym->type);
- strcpy(val->name,cexpr->opval.val->sym->rname);
- return val;
- }
+value *
+constExprValue (ast * cexpr, int check)
+{
+ cexpr = decorateType (resolveSymbols (cexpr), RESULT_TYPE_NONE);
- /* if we are casting a literal value then */
- if (IS_AST_OP(cexpr) &&
- cexpr->opval.op == CAST &&
- IS_LITERAL(cexpr->left->ftype))
- return valCastLiteral(cexpr->ftype,
- floatFromVal(cexpr->left->opval.val));
+ /* if this is not a constant then */
+ if (!IS_LITERAL (cexpr->ftype))
+ {
+ /* then check if this is a literal array
+ in code segment */
+ if (SPEC_SCLS (cexpr->etype) == S_CODE &&
+ SPEC_CVAL (cexpr->etype).v_char &&
+ IS_ARRAY (cexpr->ftype))
+ {
+ value *val = valFromType (cexpr->ftype);
+ SPEC_SCLS (val->etype) = S_LITERAL;
+ val->sym = cexpr->opval.val->sym;
+ val->sym->type = copyLinkChain (cexpr->ftype);
+ val->sym->etype = getSpec (val->sym->type);
+ strncpyz (val->name, cexpr->opval.val->sym->rname, SDCC_NAME_MAX);
+ return val;
+ }
- if (IS_AST_VALUE(cexpr))
- return cexpr->opval.val;
+ /* if we are casting a literal value then */
+ if (IS_AST_OP (cexpr) &&
+ cexpr->opval.op == CAST &&
+ IS_LITERAL (cexpr->right->ftype))
+ {
+ return valCastLiteral (cexpr->ftype,
+ floatFromVal (cexpr->right->opval.val));
+ }
+
+ if (IS_AST_VALUE (cexpr))
+ {
+ return cexpr->opval.val;
+ }
- if (check)
- werror(E_CONST_EXPECTED,"found expression");
+ if (check)
+ werror (E_CONST_EXPECTED, "found expression");
- return NULL ;
+ return NULL;
}
- /* return the value */
- return cexpr->opval.val ;
-
+ /* return the value */
+ if (IS_AST_VALUE (cexpr))
+ {
+ return cexpr->opval.val;
+ }
+ return NULL;
}
/*-----------------------------------------------------------------*/
/* isLabelInAst - will return true if a given label is found */
/*-----------------------------------------------------------------*/
-bool isLabelInAst (symbol *label, ast *tree)
+bool
+isLabelInAst (symbol * label, ast * tree)
{
- if (!tree || IS_AST_VALUE(tree) || IS_AST_LINK(tree))
- return FALSE ;
-
- if (IS_AST_OP(tree) &&
- tree->opval.op == LABEL &&
- isSymbolEqual(AST_SYMBOL(tree->left),label))
- return TRUE;
+ if (!tree || IS_AST_VALUE (tree) || IS_AST_LINK (tree))
+ return FALSE;
- return isLabelInAst(label,tree->right) &&
- isLabelInAst(label,tree->left);
+ if (IS_AST_OP (tree) &&
+ tree->opval.op == LABEL &&
+ isSymbolEqual (AST_SYMBOL (tree->left), label))
+ return TRUE;
+ return isLabelInAst (label, tree->right) &&
+ isLabelInAst (label, tree->left);
}
/*-----------------------------------------------------------------*/
/* isLoopCountable - return true if the loop count can be determi- */
/* -ned at compile time . */
/*-----------------------------------------------------------------*/
-bool isLoopCountable (ast *initExpr, ast *condExpr, ast *loopExpr,
- symbol **sym,ast **init, ast **end)
+static bool
+isLoopCountable (ast * initExpr, ast * condExpr, ast * loopExpr,
+ symbol ** sym, ast ** init, ast ** end)
{
- /* the loop is considered countable if the following
- conditions are true :-
+ /* the loop is considered countable if the following
+ conditions are true :-
- a) initExpr :- <sym> = <const>
- b) condExpr :- <sym> < <const1>
- c) loopExpr :- <sym> ++
- */
+ a) initExpr :- <sym> = <const>
+ b) condExpr :- <sym> < <const1>
+ c) loopExpr :- <sym> ++
+ */
- /* first check the initExpr */
- if ( IS_AST_OP(initExpr) &&
- initExpr->opval.op == '=' && /* is assignment */
- IS_AST_SYM_VALUE(initExpr->left)) { /* left is a symbol */
+ /* first check the initExpr */
+ if (IS_AST_OP (initExpr) &&
+ initExpr->opval.op == '=' && /* is assignment */
+ IS_AST_SYM_VALUE (initExpr->left))
+ { /* left is a symbol */
- *sym = AST_SYMBOL(initExpr->left);
- *init= initExpr->right;
+ *sym = AST_SYMBOL (initExpr->left);
+ *init = initExpr->right;
}
- else
- return FALSE;
-
- /* for now the symbol has to be of
- integral type */
- if (!IS_INTEGRAL((*sym)->type))
- return FALSE;
+ else
+ return FALSE;
- /* now check condExpr */
- if (IS_AST_OP(condExpr)) {
+ /* don't reverse loop with volatile counter */
+ if (IS_VOLATILE ((*sym)->type))
+ return FALSE;
- switch (condExpr->opval.op) {
- case '<':
- if (IS_AST_SYM_VALUE(condExpr->left) &&
- isSymbolEqual (*sym,AST_SYMBOL(condExpr->left)) &&
- IS_AST_LIT_VALUE(condExpr->right)) {
- *end = condExpr->right;
- break;
- }
- return FALSE;
+ /* for now the symbol has to be of
+ integral type */
+ if (!IS_INTEGRAL ((*sym)->type))
+ return FALSE;
- case '!':
- if (IS_AST_OP(condExpr->left) &&
- condExpr->left->opval.op == '>' &&
- IS_AST_LIT_VALUE(condExpr->left->right) &&
- IS_AST_SYM_VALUE(condExpr->left->left)&&
- isSymbolEqual (*sym,AST_SYMBOL(condExpr->left->left))) {
-
- *end = newNode('+', condExpr->left->right,
- newAst_VALUE(constVal("1")));
- break;
- }
- return FALSE ;
+ /* now check condExpr */
+ if (IS_AST_OP (condExpr))
+ {
- default:
- return FALSE ;
- }
+ switch (condExpr->opval.op)
+ {
+ case '<':
+ if (IS_AST_SYM_VALUE (condExpr->left) &&
+ isSymbolEqual (*sym, AST_SYMBOL (condExpr->left)) &&
+ IS_AST_LIT_VALUE (condExpr->right))
+ {
+ *end = condExpr->right;
+ break;
+ }
+ return FALSE;
+
+ case '!':
+ if (IS_AST_OP (condExpr->left) &&
+ condExpr->left->opval.op == '>' &&
+ IS_AST_LIT_VALUE (condExpr->left->right) &&
+ IS_AST_SYM_VALUE (condExpr->left->left) &&
+ isSymbolEqual (*sym, AST_SYMBOL (condExpr->left->left)))
+ {
+
+ *end = newNode ('+', condExpr->left->right,
+ newAst_VALUE (constCharVal (1)));
+ break;
+ }
+ return FALSE;
+
+ default:
+ return FALSE;
+ }
}
+ else
+ return FALSE;
- /* check loop expression is of the form <sym>++ */
- if (!IS_AST_OP(loopExpr))
- return FALSE ;
+ /* check loop expression is of the form <sym>++ */
+ if (!IS_AST_OP (loopExpr))
+ return FALSE;
- /* check if <sym> ++ */
- if (loopExpr->opval.op == INC_OP) {
+ /* check if <sym> ++ */
+ if (loopExpr->opval.op == INC_OP)
+ {
- if (loopExpr->left) {
- /* pre */
- if (IS_AST_SYM_VALUE(loopExpr->left) &&
- isSymbolEqual(*sym,AST_SYMBOL(loopExpr->left)))
- return TRUE ;
+ if (loopExpr->left)
+ {
+ /* pre */
+ if (IS_AST_SYM_VALUE (loopExpr->left) &&
+ isSymbolEqual (*sym, AST_SYMBOL (loopExpr->left)))
+ return TRUE;
- } else {
- /* post */
- if (IS_AST_SYM_VALUE(loopExpr->right) &&
- isSymbolEqual(*sym,AST_SYMBOL(loopExpr->right)))
- return TRUE ;
- }
+ }
+ else
+ {
+ /* post */
+ if (IS_AST_SYM_VALUE (loopExpr->right) &&
+ isSymbolEqual (*sym, AST_SYMBOL (loopExpr->right)))
+ return TRUE;
+ }
}
- else {
- /* check for += */
- if ( loopExpr->opval.op == ADD_ASSIGN ) {
+ else
+ {
+ /* check for += */
+ if (loopExpr->opval.op == ADD_ASSIGN)
+ {
- if (IS_AST_SYM_VALUE(loopExpr->left) &&
- isSymbolEqual(*sym,AST_SYMBOL(loopExpr->left)) &&
- IS_AST_LIT_VALUE(loopExpr->right) &&
- (int)AST_LIT_VALUE(loopExpr->right) != 1)
- return TRUE ;
- }
+ if (IS_AST_SYM_VALUE (loopExpr->left) &&
+ isSymbolEqual (*sym, AST_SYMBOL (loopExpr->left)) &&
+ IS_AST_LIT_VALUE (loopExpr->right) &&
+ AST_ULONG_VALUE (loopExpr->right) != 1)
+ return TRUE;
+ }
}
- return FALSE;
+ return FALSE;
}
/*-----------------------------------------------------------------*/
/* astHasVolatile - returns true if ast contains any volatile */
/*-----------------------------------------------------------------*/
-bool astHasVolatile (ast *tree)
+bool
+astHasVolatile (ast * tree)
{
- if (!tree)
- return FALSE ;
+ if (!tree)
+ return FALSE;
- if (TETYPE(tree) && IS_VOLATILE(TETYPE(tree)))
- return TRUE;
+ if (TETYPE (tree) && IS_VOLATILE (TETYPE (tree)))
+ return TRUE;
- if (IS_AST_OP(tree))
- return astHasVolatile(tree->left) ||
- astHasVolatile(tree->right);
- else
- return FALSE ;
+ if (IS_AST_OP (tree))
+ return astHasVolatile (tree->left) ||
+ astHasVolatile (tree->right);
+ else
+ return FALSE;
}
/*-----------------------------------------------------------------*/
-/* astHasPointer - return true if the ast contains any ptr variable*/
+/* astHasPointer - return true if the ast contains any ptr variable */
/*-----------------------------------------------------------------*/
-bool astHasPointer (ast *tree)
+bool
+astHasPointer (ast * tree)
{
- if (!tree)
- return FALSE ;
+ if (!tree)
+ return FALSE;
- if (IS_AST_LINK(tree))
- return TRUE;
+ if (IS_AST_LINK (tree))
+ return TRUE;
- /* if we hit an array expression then check
- only the left side */
- if (IS_AST_OP(tree) && tree->opval.op == '[')
- return astHasPointer(tree->left);
+ /* if we hit an array expression then check
+ only the left side */
+ if (IS_AST_OP (tree) && tree->opval.op == '[')
+ return astHasPointer (tree->left);
- if (IS_AST_VALUE(tree))
- return IS_PTR(tree->ftype) || IS_ARRAY(tree->ftype);
+ if (IS_AST_VALUE (tree))
+ return IS_PTR (tree->ftype) || IS_ARRAY (tree->ftype);
- return astHasPointer(tree->left) ||
- astHasPointer(tree->right);
+ return astHasPointer (tree->left) ||
+ astHasPointer (tree->right);
}
/*-----------------------------------------------------------------*/
/* astHasSymbol - return true if the ast has the given symbol */
/*-----------------------------------------------------------------*/
-bool astHasSymbol (ast *tree, symbol *sym)
+bool
+astHasSymbol (ast * tree, symbol * sym)
{
- if (!tree || IS_AST_LINK(tree))
- return FALSE ;
+ if (!tree || IS_AST_LINK (tree))
+ return FALSE;
- if (IS_AST_VALUE(tree)) {
- if (IS_AST_SYM_VALUE(tree))
- return isSymbolEqual(AST_SYMBOL(tree),sym);
- else
- return FALSE;
+ if (IS_AST_VALUE (tree))
+ {
+ if (IS_AST_SYM_VALUE (tree))
+ return isSymbolEqual (AST_SYMBOL (tree), sym);
+ else
+ return FALSE;
}
- return astHasSymbol(tree->left,sym) ||
- astHasSymbol(tree->right,sym);
+ return astHasSymbol (tree->left, sym) ||
+ astHasSymbol (tree->right, sym);
}
/*-----------------------------------------------------------------*/
-/* isConformingBody - the loop body has to conform to a set of rules */
-/* for the loop to be considered reversible read on for rules */
+/* astHasDeref - return true if the ast has an indirect access */
/*-----------------------------------------------------------------*/
-bool isConformingBody (ast *pbody, symbol *sym, ast *body)
+static bool
+astHasDeref (ast * tree)
{
+ if (!tree || IS_AST_LINK (tree) || IS_AST_VALUE(tree))
+ return FALSE;
- /* we are going to do a pre-order traversal of the
- tree && check for the following conditions. (essentially
- a set of very shallow tests )
- a) the sym passed does not participate in
- any arithmetic operation
- b) There are no function calls
- c) all jumps are within the body
- d) address of loop control variable not taken
- e) if an assignment has a pointer on the
- left hand side make sure right does not have
- loop control variable */
-
- /* if we reach the end or a leaf then true */
- if (!pbody || IS_AST_LINK(pbody) || IS_AST_VALUE(pbody))
- return TRUE ;
-
-
- /* if anything else is "volatile" */
- if (IS_VOLATILE(TETYPE(pbody)))
- return FALSE;
-
- /* we will walk the body in a pre-order traversal for
- efficiency sake */
- switch (pbody->opval.op) {
- /*------------------------------------------------------------------*/
- case '[' :
- return isConformingBody (pbody->right,sym,body);
-
- /*------------------------------------------------------------------*/
- case PTR_OP:
- case '.' :
- return TRUE;
-
- /*------------------------------------------------------------------*/
- case INC_OP: /* incerement operator unary so left only */
- case DEC_OP:
-
- /* sure we are not sym is not modified */
- if (pbody->left &&
- IS_AST_SYM_VALUE(pbody->left) &&
- isSymbolEqual(AST_SYMBOL(pbody->left),sym))
- return FALSE;
-
- if (pbody->right &&
- IS_AST_SYM_VALUE(pbody->right) &&
- isSymbolEqual(AST_SYMBOL(pbody->right),sym))
- return FALSE;
-
- return TRUE;
+ if (tree->opval.op == '*' && tree->right == NULL) return TRUE;
- /*------------------------------------------------------------------*/
+ return astHasDeref (tree->left) || astHasDeref (tree->right);
+}
- case '*' : /* can be unary : if right is null then unary operation */
- case '+' :
- case '-' :
- case '&':
+/*-----------------------------------------------------------------*/
+/* isConformingBody - the loop body has to conform to a set of */
+/* rules for the loop to be considered reversible read on for rules*/
+/*-----------------------------------------------------------------*/
+bool
+isConformingBody (ast * pbody, symbol * sym, ast * body)
+{
- /* if right is NULL then unary operation */
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* address of */
- /*----------------------------*/
- if ( ! pbody->right ) {
- if (IS_AST_SYM_VALUE(pbody->left) &&
- isSymbolEqual(AST_SYMBOL(pbody->left),sym))
+ /* we are going to do a pre-order traversal of the
+ tree && check for the following conditions. (essentially
+ a set of very shallow tests )
+ a) the sym passed does not participate in any arithmetic operation
+ b) There are no function calls
+ c) all jumps are within the body
+ d) address of loop control variable not taken
+ e) if an assignment has a pointer on the left hand side make sure
+ right does not have loop control variable
+ */
+
+ /* if we reach the end or a leaf then true */
+ if (!pbody || IS_AST_LINK (pbody) || IS_AST_VALUE (pbody))
+ return TRUE;
+
+ /* if anything else is "volatile" */
+ if (IS_VOLATILE (TETYPE (pbody)))
return FALSE;
+
+ /* we will walk the body in a pre-order traversal for
+ efficiency sake */
+ switch (pbody->opval.op)
+ {
+/*------------------------------------------------------------------*/
+ case '[':
+ // if the loopvar is used as an index
+ /* array op is commutative -- must check both left & right */
+ if (astHasSymbol(pbody->right, sym) || astHasSymbol(pbody->left, sym)) {
+ return FALSE;
+ }
+ return isConformingBody (pbody->right, sym, body)
+ && isConformingBody (pbody->left, sym, body);
+
+/*------------------------------------------------------------------*/
+ case PTR_OP:
+ case '.':
+ return TRUE;
+
+/*------------------------------------------------------------------*/
+ case INC_OP:
+ case DEC_OP:
+
+ /* sure we are not sym is not modified */
+ if (pbody->left &&
+ IS_AST_SYM_VALUE (pbody->left) &&
+ isSymbolEqual (AST_SYMBOL (pbody->left), sym))
+ return FALSE;
+
+ if (pbody->right &&
+ IS_AST_SYM_VALUE (pbody->right) &&
+ isSymbolEqual (AST_SYMBOL (pbody->right), sym))
+ return FALSE;
+
+ return TRUE;
+
+/*------------------------------------------------------------------*/
+
+ case '*': /* can be unary : if right is null then unary operation */
+ case '+':
+ case '-':
+ case '&':
+
+ /* if right is NULL then unary operation */
+/*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* address of */
+ /*----------------------------*/
+ if (!pbody->right)
+ {
+ if (IS_AST_SYM_VALUE (pbody->left) &&
+ isSymbolEqual (AST_SYMBOL (pbody->left), sym))
+ return FALSE;
+ else
+ return isConformingBody (pbody->left, sym, body);
+ }
else
- return isConformingBody(pbody->left,sym,body) ;
- } else {
- if (astHasSymbol(pbody->left,sym) ||
- astHasSymbol(pbody->right,sym))
- return FALSE;
- }
+ {
+ if (astHasSymbol (pbody->left, sym) ||
+ astHasSymbol (pbody->right, sym))
+ return FALSE;
+ }
- /*------------------------------------------------------------------*/
- case '|':
- case '^':
- case '/':
- case '%':
+/*------------------------------------------------------------------*/
+ case '|':
+ case '^':
+ case '/':
+ case '%':
case LEFT_OP:
case RIGHT_OP:
+ case GETABIT:
+ case GETBYTE:
+ case GETWORD:
- if (IS_AST_SYM_VALUE(pbody->left) &&
- isSymbolEqual(AST_SYMBOL(pbody->left),sym))
- return FALSE ;
+ if (IS_AST_SYM_VALUE (pbody->left) &&
+ isSymbolEqual (AST_SYMBOL (pbody->left), sym))
+ return FALSE;
- if (IS_AST_SYM_VALUE(pbody->right) &&
- isSymbolEqual(AST_SYMBOL(pbody->right),sym))
- return FALSE ;
+ if (IS_AST_SYM_VALUE (pbody->right) &&
+ isSymbolEqual (AST_SYMBOL (pbody->right), sym))
+ return FALSE;
- return isConformingBody(pbody->left,sym,body) &&
- isConformingBody(pbody->right,sym,body);
+ return isConformingBody (pbody->left, sym, body) &&
+ isConformingBody (pbody->right, sym, body);
- case '~' :
- case '!' :
+ case '~':
+ case '!':
case RRC:
case RLC:
case GETHBIT:
- if (IS_AST_SYM_VALUE(pbody->left) &&
- isSymbolEqual(AST_SYMBOL(pbody->left),sym))
- return FALSE;
- return isConformingBody (pbody->left,sym,body);
+ case SWAP:
+ if (IS_AST_SYM_VALUE (pbody->left) &&
+ isSymbolEqual (AST_SYMBOL (pbody->left), sym))
+ return FALSE;
+ return isConformingBody (pbody->left, sym, body);
- /*------------------------------------------------------------------*/
+/*------------------------------------------------------------------*/
case AND_OP:
case OR_OP:
- case '>' :
- case '<' :
+ case '>':
+ case '<':
case LE_OP:
case GE_OP:
case EQ_OP:
case NE_OP:
- case '?' :
- case ':' :
- case SIZEOF: /* evaluate wihout code generation */
-
- return isConformingBody(pbody->left,sym,body) &&
- isConformingBody(pbody->right,sym,body);
-
- /*------------------------------------------------------------------*/
- case '=' :
-
- /* if left has a pointer & right has loop
- control variable then we cannot */
- if (astHasPointer(pbody->left) &&
- astHasSymbol (pbody->right,sym))
- return FALSE ;
- if (astHasVolatile(pbody->left))
- return FALSE ;
+ case '?':
+ case ':':
+ case SIZEOF: /* evaluate wihout code generation */
+
+ if (IS_AST_SYM_VALUE (pbody->left) &&
+ isSymbolEqual (AST_SYMBOL (pbody->left), sym))
+ return FALSE;
+
+ if (IS_AST_SYM_VALUE (pbody->right) &&
+ isSymbolEqual (AST_SYMBOL (pbody->right), sym))
+ return FALSE;
+
+ return isConformingBody (pbody->left, sym, body) &&
+ isConformingBody (pbody->right, sym, body);
+
+/*------------------------------------------------------------------*/
+ case '=':
+
+ /* if left has a pointer & right has loop
+ control variable then we cannot */
+ if (astHasPointer (pbody->left) &&
+ astHasSymbol (pbody->right, sym))
+ return FALSE;
+ if (astHasVolatile (pbody->left))
+ return FALSE;
+
+ if (IS_AST_SYM_VALUE (pbody->left)) {
+ // if the loopvar has an assignment
+ if (isSymbolEqual (AST_SYMBOL (pbody->left), sym))
+ return FALSE;
+ // if the loopvar is used in another (maybe conditional) block
+ if (astHasSymbol (pbody->right, sym) &&
+ (pbody->level >= body->level)) {
+ return FALSE;
+ }
+ }
- if (IS_AST_SYM_VALUE(pbody->left) &&
- isSymbolEqual(AST_SYMBOL(pbody->left),sym))
- return FALSE ;
+ if (astHasVolatile (pbody->left))
+ return FALSE;
- if (astHasVolatile(pbody->left))
- return FALSE;
+ if (astHasDeref(pbody->right))
+ return FALSE;
- return isConformingBody(pbody->left,sym,body) &&
- isConformingBody(pbody->right,sym,body);
+ return isConformingBody (pbody->left, sym, body) &&
+ isConformingBody (pbody->right, sym, body);
case MUL_ASSIGN:
case DIV_ASSIGN:
case LEFT_ASSIGN:
case SUB_ASSIGN:
case ADD_ASSIGN:
- assert("Parser should not have generated this\n");
-
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* comma operator */
- /*----------------------------*/
- case ',' :
- return isConformingBody(pbody->left,sym,body) &&
- isConformingBody(pbody->right,sym,body);
-
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* function call */
- /*----------------------------*/
+ assert ("Parser should not have generated this\n");
+
+/*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* comma operator */
+ /*----------------------------*/
+ case ',':
+ return isConformingBody (pbody->left, sym, body) &&
+ isConformingBody (pbody->right, sym, body);
+
+/*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* function call */
+ /*----------------------------*/
case CALL:
- return FALSE;
+ /* if local & not passed as parameter &
+ not used to find the function then ok */
+ if (sym->level && !astHasSymbol (pbody->right, sym) &&
+ !astHasSymbol (pbody->left, sym))
+ {
+ return TRUE;
+ }
+ return FALSE;
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* return statement */
- /*----------------------------*/
+/*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* return statement */
+ /*----------------------------*/
case RETURN:
- return FALSE ;
+ return FALSE;
case GOTO:
- if (isLabelInAst (AST_SYMBOL(pbody->left),body))
- return TRUE ;
- else
- return FALSE;
+ if (isLabelInAst (AST_SYMBOL (pbody->left), body))
+ return TRUE;
+ else
+ return FALSE;
case SWITCH:
- if (astHasSymbol(pbody->left,sym))
- return FALSE ;
+ if (astHasSymbol (pbody->left, sym))
+ return FALSE;
default:
- break;
+ break;
}
- return isConformingBody(pbody->left,sym,body) &&
- isConformingBody(pbody->right,sym,body);
-
-
-
+ return isConformingBody (pbody->left, sym, body) &&
+ isConformingBody (pbody->right, sym, body);
}
/*-----------------------------------------------------------------*/
/* if the for loop is reversible. If yes will set the value of */
/* the loop control var & init value & termination value */
/*-----------------------------------------------------------------*/
-bool isLoopReversible (ast *loop, symbol **loopCntrl,
- ast **init, ast **end )
+static bool
+isLoopReversible (ast * loop, symbol ** loopCntrl,
+ ast ** init, ast ** end)
{
- /* if option says don't do it then don't */
- if (optimize.noLoopReverse)
- return 0;
- /* there are several tests to determine this */
-
- /* for loop has to be of the form
- for ( <sym> = <const1> ;
- [<sym> < <const2>] ;
- [<sym>++] | [<sym> += 1] | [<sym> = <sym> + 1] )
- forBody */
- if (! isLoopCountable (AST_FOR(loop,initExpr),
- AST_FOR(loop,condExpr),
- AST_FOR(loop,loopExpr),
- loopCntrl,init,end))
- return 0;
+ /* if option says don't do it then don't */
+ if (optimize.noLoopReverse)
+ return 0;
+ /* there are several tests to determine this */
+
+ /* for loop has to be of the form
+ for ( <sym> = <const1> ;
+ [<sym> < <const2>] ;
+ [<sym>++] | [<sym> += 1] | [<sym> = <sym> + 1] )
+ forBody */
+ if (!isLoopCountable (AST_FOR (loop, initExpr),
+ AST_FOR (loop, condExpr),
+ AST_FOR (loop, loopExpr),
+ loopCntrl, init, end))
+ return 0;
- /* now do some serious checking on the body of the loop
- */
+ /* now do some serious checking on the body of the loop
+ */
- return isConformingBody(loop->left,*loopCntrl,loop->left);
+ return isConformingBody (loop->left, *loopCntrl, loop->left);
}
/*-----------------------------------------------------------------*/
/* replLoopSym - replace the loop sym by loop sym -1 */
/*-----------------------------------------------------------------*/
-static void replLoopSym ( ast *body, symbol *sym)
+static void
+replLoopSym (ast * body, symbol * sym)
{
- /* reached end */
- if (!body || IS_AST_LINK(body))
- return ;
+ /* reached end */
+ if (!body || IS_AST_LINK (body))
+ return;
- if (IS_AST_SYM_VALUE(body)) {
+ if (IS_AST_SYM_VALUE (body))
+ {
- if (isSymbolEqual(AST_SYMBOL(body),sym)) {
+ if (isSymbolEqual (AST_SYMBOL (body), sym))
+ {
- body->type = EX_OP;
- body->opval.op = '-';
- body->left = newAst_VALUE(symbolVal(sym));
- body->right= newAst_VALUE(constVal("1"));
+ body->type = EX_OP;
+ body->opval.op = '-';
+ body->left = newAst_VALUE (symbolVal (sym));
+ body->right = newAst_VALUE (constCharVal (1));
- }
+ }
- return;
+ return;
}
- replLoopSym(body->left,sym);
- replLoopSym(body->right,sym);
+ replLoopSym (body->left, sym);
+ replLoopSym (body->right, sym);
}
/*-----------------------------------------------------------------*/
/* reverseLoop - do the actual loop reversal */
/*-----------------------------------------------------------------*/
-ast *reverseLoop (ast *loop, symbol *sym, ast *init, ast *end)
+ast *
+reverseLoop (ast * loop, symbol * sym, ast * init, ast * end)
{
- ast *rloop ;
-
- /* create the following tree
- <sym> = loopCount ;
- for_continue:
- forbody
- <sym> -= 1;
- if (sym) goto for_continue ;
- <sym> = end */
-
- /* put it together piece by piece */
- rloop = newNode (NULLOP,
- createIf(newAst_VALUE(symbolVal(sym)),
- newNode(GOTO,
- newAst_VALUE(symbolVal(AST_FOR(loop,continueLabel))),
- NULL),NULL),
- newNode('=',
- newAst_VALUE(symbolVal(sym)),
- end));
-
- replLoopSym(loop->left, sym);
-
- rloop = newNode(NULLOP,
- newNode('=',
- newAst_VALUE(symbolVal(sym)),
- newNode('-',end,init)),
- createLabel(AST_FOR(loop,continueLabel),
- newNode(NULLOP,
- loop->left,
- newNode(NULLOP,
- newNode(SUB_ASSIGN,
- newAst_VALUE(symbolVal(sym)),
- newAst_VALUE(constVal("1"))),
- rloop ))));
-
- return decorateType(rloop);
+ ast *rloop;
+
+ /* create the following tree
+ <sym> = loopCount ;
+ for_continue:
+ forbody
+ <sym> -= 1;
+ if (sym) goto for_continue ;
+ <sym> = end */
+
+ /* put it together piece by piece */
+ rloop = newNode (NULLOP,
+ createIf (newAst_VALUE (symbolVal (sym)),
+ newNode (GOTO,
+ newAst_VALUE (symbolVal (AST_FOR (loop, continueLabel))),
+ NULL), NULL),
+ newNode ('=',
+ newAst_VALUE (symbolVal (sym)),
+ end));
+
+ replLoopSym (loop->left, sym);
+ setAstFileLine (rloop, init->filename, init->lineno);
+
+ rloop = newNode (NULLOP,
+ newNode ('=',
+ newAst_VALUE (symbolVal (sym)),
+ newNode ('-', end, init)),
+ createLabel (AST_FOR (loop, continueLabel),
+ newNode (NULLOP,
+ loop->left,
+ newNode (NULLOP,
+ newNode (SUB_ASSIGN,
+ newAst_VALUE (symbolVal (sym)),
+ newAst_VALUE (constCharVal (1))),
+ rloop))));
+
+ rloop->lineno=init->lineno;
+ return decorateType (rloop, RESULT_TYPE_NONE);
}
-#define DEMAND_INTEGER_PROMOTION
-
-#ifdef DEMAND_INTEGER_PROMOTION
-
/*-----------------------------------------------------------------*/
-/* walk a tree looking for the leaves. Add a typecast to the given */
-/* type to each value leaf node. */
+/* searchLitOp - search tree (*ops only) for an ast with literal */
/*-----------------------------------------------------------------*/
-void pushTypeCastToLeaves(sym_link *type, ast *node, ast **parentPtr)
+static ast *
+searchLitOp (ast *tree, ast **parent, const char *ops)
{
- if (!node)
- {
- /* WTF? We should never get here. */
- return;
- }
+ ast *ret;
- if (!node->left && !node->right)
+ if (tree && optimize.global_cse)
{
- /* We're at a leaf; if it's a value, apply the typecast */
- if (node->type == EX_VALUE && IS_INTEGRAL(TTYPE(node)))
+ /* is there a literal operand? */
+ if (tree->right &&
+ IS_AST_OP(tree->right) &&
+ tree->right->right &&
+ (tree->right->opval.op == (unsigned)ops[0] || tree->right->opval.op == (unsigned)ops[1]))
{
- *parentPtr = decorateType(newNode(CAST,
- newAst_LINK(copyLinkChain(type)),
- node));
- }
- }
- else
- {
- if (node->left)
- {
- pushTypeCastToLeaves(type, node->left, &(node->left));
- }
- if (node->right)
- {
- pushTypeCastToLeaves(type, node->right, &(node->right));
- }
+ if (IS_LITERAL (RTYPE (tree->right)) !=
+ IS_LITERAL (LTYPE (tree->right)))
+ {
+ tree->right->decorated = 0;
+ tree->decorated = 0;
+ *parent = tree;
+ return tree->right;
+ }
+ ret = searchLitOp (tree->right, parent, ops);
+ if (ret)
+ return ret;
+ }
+ if (tree->left &&
+ IS_AST_OP(tree->left) &&
+ tree->left->right &&
+ (tree->left->opval.op == (unsigned)ops[0] || tree->left->opval.op == (unsigned)ops[1]))
+ {
+ if (IS_LITERAL (RTYPE (tree->left)) !=
+ IS_LITERAL (LTYPE (tree->left)))
+ {
+ tree->left->decorated = 0;
+ tree->decorated = 0;
+ *parent = tree;
+ return tree->left;
+ }
+ ret = searchLitOp (tree->left, parent, ops);
+ if (ret)
+ return ret;
+ }
}
+ return NULL;
}
-#endif
-
/*-----------------------------------------------------------------*/
-/* Given an assignment operation in a tree, determine if the LHS */
-/* (the result) has a different (integer) type than the RHS. */
-/* If so, walk the RHS and add a typecast to the type of the LHS */
-/* to all leaf nodes. */
+/* getResultFromType */
/*-----------------------------------------------------------------*/
-void propAsgType(ast *tree)
+RESULT_TYPE
+getResultTypeFromType (sym_link *type)
{
-#ifdef DEMAND_INTEGER_PROMOTION
- if (!IS_INTEGRAL(LTYPE(tree)) || !IS_INTEGRAL(RTYPE(tree)))
+ /* type = getSpec (type); */
+ if (IS_BIT (type))
+ return RESULT_TYPE_BIT;
+ if (IS_BITFIELD (type))
{
- /* Nothing to do here... */
- return;
- }
+ int blen = SPEC_BLEN (type);
- if (getSize(LTYPE(tree)) > getSize(RTYPE(tree)))
- {
- pushTypeCastToLeaves(LTYPE(tree), tree->right, &(tree->right));
+ if (blen <= 1)
+ return RESULT_TYPE_BIT;
+ if (blen <= 8)
+ return RESULT_TYPE_CHAR;
+ return RESULT_TYPE_INT;
}
-#else
- (void)tree;
-#endif
+ if (IS_CHAR (type))
+ return RESULT_TYPE_CHAR;
+ if (IS_INT (type) && !IS_LONG (type))
+ return RESULT_TYPE_INT;
+ return RESULT_TYPE_OTHER;
}
/*-----------------------------------------------------------------*/
-/* decorateType - compute type for this tree also does type cheking*/
-/* this is done bottom up, since type have to flow upwards*/
-/* it also does constant folding, and paramater checking */
+/* addCast - adds casts to a type specified by RESULT_TYPE */
/*-----------------------------------------------------------------*/
-ast *decorateType (ast *tree)
+static ast *
+addCast (ast *tree, RESULT_TYPE resultType, bool promote)
{
- int parmNumber ;
- sym_link *p;
-
- if ( ! tree )
- return tree ;
+ sym_link *newLink;
+ bool upCasted = FALSE;
- /* if already has type then do nothing */
- if ( tree->decorated )
- return tree ;
+ switch (resultType)
+ {
+ case RESULT_TYPE_NONE:
+ /* if thing smaller than int must be promoted to int */
+ if (!promote ||
+ getSize (tree->etype) >= INTSIZE)
+ /* promotion not necessary or already an int */
+ return tree;
+ /* char and bits: promote to int */
+ newLink = newIntLink();
+ upCasted = TRUE;
+ break;
+ case RESULT_TYPE_BIT:
+ if (!promote ||
+ /* already an int */
+ bitsForType (tree->etype) >= 16 ||
+ /* bit to bit operation: don't promote, the code generators
+ hopefully know everything about promotion rules */
+ bitsForType (tree->etype) == 1)
+ return tree;
+ newLink = newIntLink();
+ upCasted = TRUE;
+ break;
+ case RESULT_TYPE_CHAR:
+ if (IS_CHAR (tree->etype) ||
+ IS_FLOAT(tree->etype) ||
+ IS_FIXED(tree->etype))
+ return tree;
+ newLink = newCharLink();
+ break;
+ case RESULT_TYPE_INT:
+#if 0
+ if (getSize (tree->etype) > INTSIZE)
+ {
+ /* warn ("Loosing significant digits"); */
+ return;
+ }
+#endif
+ /* char: promote to int */
+ if (!promote ||
+ getSize (tree->etype) >= INTSIZE)
+ return tree;
+ newLink = newIntLink();
+ upCasted = TRUE;
+ break;
+ case RESULT_TYPE_IFX:
+ case RESULT_TYPE_OTHER:
+ if (!promote ||
+ /* return type is ifx, long, float: promote char to int */
+ getSize (tree->etype) >= INTSIZE)
+ return tree;
+ newLink = newIntLink();
+ upCasted = TRUE;
+ break;
+ default:
+ return tree;
+ }
+ tree->decorated = 0;
+ tree = newNode (CAST, newAst_LINK (newLink), tree);
+ tree->filename = tree->right->filename;
+ tree->lineno = tree->right->lineno;
+ /* keep unsigned type during cast to smaller type,
+ but not when promoting from char to int */
+ if (!upCasted)
+ SPEC_USIGN (tree->left->opval.lnk) = IS_UNSIGNED (tree->right->etype) ? 1 : 0;
+ return decorateType (tree, resultType);
+}
- tree->decorated = 1;
+/*-----------------------------------------------------------------*/
+/* resultTypePropagate - decides if resultType can be propagated */
+/*-----------------------------------------------------------------*/
+static RESULT_TYPE
+resultTypePropagate (ast *tree, RESULT_TYPE resultType)
+{
+ switch (tree->opval.op)
+ {
+ case AND_OP:
+ case OR_OP:
+ case '!':
+ case '=':
+ case '?':
+ case ':':
+ case '|':
+ case '^':
+ case '~':
+ case LEFT_OP:
+ case LABEL:
+ return resultType;
+ case '*':
+ case '+':
+ case '-':
+ if ((IS_AST_VALUE (tree->left) && !IS_INTEGRAL (tree->left->opval.val->etype)) ||
+ (IS_AST_VALUE (tree->right) && !IS_INTEGRAL (tree->right->opval.val->etype)))
+ return RESULT_TYPE_NONE;
+ return resultType;
+ case '&':
+ if (!tree->right)
+ /* can be unary */
+ return RESULT_TYPE_NONE;
+ else
+ return resultType;
+ case IFX:
+ return RESULT_TYPE_IFX;
+ default:
+ return RESULT_TYPE_NONE;
+ }
+}
- /* print the line */
- /* if not block & function */
- if ( tree->type == EX_OP &&
- ( tree->opval.op != FUNCTION &&
- tree->opval.op != BLOCK &&
- tree->opval.op != NULLOP )) {
- filename = tree->filename ;
- lineno = tree->lineno ;
+/*-----------------------------------------------------------------*/
+/* getLeftResultType - gets type from left branch for propagation */
+/*-----------------------------------------------------------------*/
+static RESULT_TYPE
+getLeftResultType (ast *tree, RESULT_TYPE resultType)
+{
+ switch (tree->opval.op)
+ {
+ case '=':
+ case CAST:
+ if (IS_PTR (LTYPE (tree)))
+ return RESULT_TYPE_NONE;
+ else
+ return getResultTypeFromType (LETYPE (tree));
+ case RETURN:
+ if (IS_PTR (currFunc->type->next))
+ return RESULT_TYPE_NONE;
+ else
+ return getResultTypeFromType (currFunc->type->next);
+ case '[':
+ if (!IS_ARRAY (LTYPE (tree)))
+ return resultType;
+ if (DCL_ELEM (LTYPE (tree)) > 0 && DCL_ELEM (LTYPE (tree)) <= 255)
+ return RESULT_TYPE_CHAR;
+ return resultType;
+ default:
+ return resultType;
}
+}
- /* if any child is an error | this one is an error do nothing */
- if ( tree->isError ||
- ( tree->left && tree->left->isError) ||
- ( tree->right && tree->right->isError ))
- return tree ;
+/*------------------------------------------------------------------*/
+/* gatherImplicitVariables: assigns correct type information to */
+/* symbols and values created by replaceAstWithTemporary */
+/* and adds the symbols to the declarations list of the */
+/* innermost block that contains them */
+/*------------------------------------------------------------------*/
+void
+gatherImplicitVariables (ast * tree, ast * block)
+{
+ if (!tree)
+ return;
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* leaf has been reached */
- /*----------------------------*/
- /* if this is of type value */
- /* just get the type */
- if ( tree->type == EX_VALUE ) {
+ if (tree->type == EX_OP && tree->opval.op == BLOCK)
+ {
+ /* keep track of containing scope */
+ block = tree;
+ }
+ if (tree->type == EX_OP && tree->opval.op == '=' &&
+ tree->left->type == EX_VALUE && tree->left->opval.val->sym)
+ {
+ symbol *assignee = tree->left->opval.val->sym;
+
+ /* special case for assignment to compiler-generated temporary variable:
+ compute type of RHS, and set the symbol's type to match */
+ if (assignee->type == NULL && assignee->infertype) {
+ ast *dtr = decorateType (resolveSymbols(tree->right), RESULT_TYPE_NONE);
+
+ if (dtr != tree->right)
+ tree->right = dtr;
+
+ assignee->type = copyLinkChain(TTYPE(dtr));
+ assignee->etype = getSpec(assignee->type);
+ SPEC_SCLS (assignee->etype) = S_AUTO;
+ SPEC_OCLS (assignee->etype) = NULL;
+ SPEC_EXTR (assignee->etype) = 0;
+ SPEC_STAT (assignee->etype) = 0;
+ SPEC_VOLATILE (assignee->etype) = 0;
+ SPEC_ABSA (assignee->etype) = 0;
+
+ wassertl(block != NULL, "implicit variable not contained in block");
+ wassert(assignee->next == NULL);
+ if (block != NULL) {
+ symbol **decl = &(block->values.sym);
+
+ while (*decl) {
+ wassert(*decl != assignee); /* should not already be in list */
+ decl = &( (*decl)->next );
+ }
+
+ *decl = assignee;
+ }
+ }
+ }
+ if (tree->type == EX_VALUE && !(IS_LITERAL(tree->opval.val->etype)) &&
+ tree->opval.val->type == NULL &&
+ tree->opval.val->sym &&
+ tree->opval.val->sym->infertype)
+ {
+ /* fixup type of value for compiler-inferred temporary var */
+ tree->opval.val->type = tree->opval.val->sym->type;
+ tree->opval.val->etype = tree->opval.val->sym->etype;
+ }
- if ( IS_LITERAL(tree->opval.val->etype) ) {
+ gatherImplicitVariables(tree->left, block);
+ gatherImplicitVariables(tree->right, block);
+}
- /* if this is a character array then declare it */
- if (IS_ARRAY(tree->opval.val->type))
- tree->opval.val = stringToSymbol(tree->opval.val);
+/*--------------------------------------------------------------------*/
+/* decorateType - compute type for this tree, also does type checking.*/
+/* This is done bottom up, since type has to flow upwards. */
+/* resultType flows top-down and forces e.g. char-arithmetic, if the */
+/* result is a char and the operand(s) are int's. */
+/* It also does constant folding, and parameter checking. */
+/*--------------------------------------------------------------------*/
+ast *
+decorateType (ast * tree, RESULT_TYPE resultType)
+{
+ int parmNumber;
+ sym_link *p;
+ RESULT_TYPE resultTypeProp;
- /* otherwise just copy the type information */
- COPYTYPE(TTYPE(tree),TETYPE(tree),tree->opval.val->type);
- if (funcInChain(tree->opval.val->type)) {
- tree->hasVargs = tree->opval.val->sym->hasVargs;
- tree->args = copyValueChain(tree->opval.val->sym->args) ;
- }
- return tree ;
- }
+ if (!tree)
+ return tree;
- if ( tree->opval.val->sym ) {
- /* if the undefined flag is set then give error message */
- if (tree->opval.val->sym->undefined ) {
- werror(E_ID_UNDEF,tree->opval.val->sym->name) ;
- /* assume int */
- TTYPE(tree) = TETYPE(tree) =
- tree->opval.val->type = tree->opval.val->sym->type =
- tree->opval.val->etype = tree->opval.val->sym->etype =
- copyLinkChain(INTTYPE);
- }
- else {
+ /* if already has type then do nothing */
+ if (tree->decorated)
+ return tree;
- /* if impilicit i.e. struct/union member then no type */
- if (tree->opval.val->sym->implicit )
- TTYPE(tree) = TETYPE(tree) = NULL ;
+ tree->decorated = 1;
- else {
+#if 0
+ /* print the line */
+ /* if not block & function */
+ if (tree->type == EX_OP &&
+ (tree->opval.op != FUNCTION &&
+ tree->opval.op != BLOCK &&
+ tree->opval.op != NULLOP))
+ {
+ filename = tree->filename;
+ lineno = tree->lineno;
+ }
+#endif
- /* else copy the type */
- COPYTYPE(TTYPE(tree),TETYPE(tree),tree->opval.val->type);
+ /* if any child is an error | this one is an error do nothing */
+ if (tree->isError ||
+ (tree->left && tree->left->isError) ||
+ (tree->right && tree->right->isError))
+ return tree;
- /* and mark it as referenced */
- tree->opval.val->sym->isref = 1;
- /* if this is of type function or function pointer */
- if (funcInChain(tree->opval.val->type)) {
- tree->hasVargs = tree->opval.val->sym->hasVargs;
- tree->args = copyValueChain(tree->opval.val->sym->args) ;
+/*------------------------------------------------------------------*/
+/*----------------------------*/
+/* leaf has been reached */
+/*----------------------------*/
+ filename = tree->filename;
+ lineno = tree->lineno;
+ /* if this is of type value */
+ /* just get the type */
+ if (tree->type == EX_VALUE)
+ {
+ if (IS_LITERAL (tree->opval.val->etype))
+ {
+ /* if this is a character array then declare it */
+ if (IS_ARRAY (tree->opval.val->type))
+ tree->opval.val = stringToSymbol (tree->opval.val);
+ /* otherwise just copy the type information */
+ COPYTYPE (TTYPE (tree), TETYPE (tree), tree->opval.val->type);
+ return tree;
}
- }
- }
- }
- return tree ;
- }
+ if (tree->opval.val->sym)
+ {
+ /* if the undefined flag is set then give error message */
+ if (tree->opval.val->sym->undefined)
+ {
+ werrorfl (tree->filename, tree->lineno, E_ID_UNDEF, tree->opval.val->sym->name);
+ /* assume int */
+ TTYPE (tree) = TETYPE (tree) =
+ tree->opval.val->type = tree->opval.val->sym->type =
+ tree->opval.val->etype = tree->opval.val->sym->etype =
+ copyLinkChain (INTTYPE);
+ }
+ else if (tree->opval.val->sym->implicit)
+ {
+ /* if implicit i.e. struct/union member then no type */
+ TTYPE (tree) = TETYPE (tree) = NULL;
+ }
+ else
+ {
+ /* copy the type from the value into the ast */
+ COPYTYPE (TTYPE (tree), TETYPE (tree), tree->opval.val->type);
+
+ /* and mark the symbol as referenced */
+ tree->opval.val->sym->isref = 1;
+ }
+ }
+ else
+ wassert(0); /* unreached: all values are literals or symbols */
- /* if type link for the case of cast */
- if ( tree->type == EX_LINK ) {
- COPYTYPE(TTYPE(tree),TETYPE(tree),tree->opval.lnk);
- return tree ;
+ return tree;
}
+ /* if type link for the case of cast */
+ if (tree->type == EX_LINK)
{
- ast *dtl, *dtr;
+ COPYTYPE (TTYPE (tree), TETYPE (tree), tree->opval.lnk);
+ return tree;
+ }
- dtl = decorateType (tree->left);
- dtr = decorateType (tree->right);
+ {
+ ast *dtl, *dtr;
- /* this is to take care of situations
- when the tree gets rewritten */
- if (dtl != tree->left)
- tree->left = dtl;
- if (dtr != tree->right)
- tree->right = dtr;
- }
+ #if 0
+ if (tree->opval.op == NULLOP || tree->opval.op == BLOCK)
+ {
+ if (tree->left && tree->left->type == EX_OPERAND
+ && (tree->left->opval.op == INC_OP
+ || tree->left->opval.op == DEC_OP)
+ && tree->left->left)
+ {
+ tree->left->right = tree->left->left;
+ tree->left->left = NULL;
+ }
+ if (tree->right && tree->right->type == EX_OPERAND
+ && (tree->right->opval.op == INC_OP
+ || tree->right->opval.op == DEC_OP)
+ && tree->right->left)
+ {
+ tree->right->right = tree->right->left;
+ tree->right->left = NULL;
+ }
+ }
+ #endif
- /* depending on type of operator do */
+ /* Before decorating the left branch we've to decide in dependence
+ upon tree->opval.op, if resultType can be propagated */
+ resultTypeProp = resultTypePropagate (tree, resultType);
- switch (tree->opval.op) {
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* array node */
- /*----------------------------*/
- case '[' :
+ if ((tree->opval.op == '?') && (resultTypeProp != RESULT_TYPE_BIT))
+ dtl = decorateType (tree->left, RESULT_TYPE_IFX);
+ else
+ dtl = decorateType (tree->left, resultTypeProp);
- /* determine which is the array & which the index */
- if ((IS_ARRAY(RTYPE(tree)) || IS_PTR(RTYPE(tree))) && IS_INTEGRAL(LTYPE(tree))) {
+ /* if an array node, we may need to swap branches */
+ if (tree->opval.op == '[')
+ {
+ /* determine which is the array & which the index */
+ if ((IS_ARRAY (RTYPE (tree)) || IS_PTR (RTYPE (tree))) &&
+ IS_INTEGRAL (LTYPE (tree)))
+ {
+ ast *tempTree = tree->left;
+ tree->left = tree->right;
+ tree->right = tempTree;
+ }
+ }
- ast *tempTree = tree->left ;
- tree->left = tree->right ;
- tree->right= tempTree ;
- }
+ /* After decorating the left branch there's type information available
+ in tree->left->?type. If the op is e.g. '=' we extract the type
+ information from there and propagate it to the right branch. */
+ resultTypeProp = getLeftResultType (tree, resultTypeProp);
- /* first check if this is a array or a pointer */
- if ( (!IS_ARRAY(LTYPE(tree))) && (!IS_PTR(LTYPE(tree)))) {
- werror(E_NEED_ARRAY_PTR,"[]");
- goto errorTreeReturn ;
- }
+ switch (tree->opval.op)
+ {
+ case '?':
+ /* delay right side for '?' operator since conditional macro
+ expansions might rely on this */
+ dtr = tree->right;
+ break;
+ case CALL:
+ /* decorate right side for CALL (parameter list) in processParms();
+ there is resultType available */
+ dtr = tree->right;
+ break;
+ case SIZEOF:
+ /* don't allocate string if it is a sizeof argument */
+ ++noAlloc;
+ dtr = decorateType (tree->right, resultTypeProp);
+ --noAlloc;
+ break;
+ default:
+ dtr = decorateType (tree->right, resultTypeProp);
+ break;
+ }
- /* check if the type of the idx */
- if (!IS_INTEGRAL(RTYPE(tree))) {
- werror(E_IDX_NOT_INT);
- goto errorTreeReturn ;
+ /* this is to take care of situations
+ when the tree gets rewritten */
+ if (dtl != tree->left)
+ tree->left = dtl;
+ if (dtr != tree->right)
+ tree->right = dtr;
+ if ((dtl && dtl->isError) || (dtr && dtr->isError))
+ return tree;
}
- /* if the left is an rvalue then error */
- if (LRVAL(tree)) {
- werror(E_LVALUE_REQUIRED,"array access");
- goto errorTreeReturn ;
- }
- RRVAL(tree) = 1;
- COPYTYPE(TTYPE(tree),TETYPE(tree),LTYPE(tree)->next);
- return tree;
+ /* depending on type of operator do */
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* struct/union */
- /*----------------------------*/
- case '.' :
- /* if this is not a structure */
- if (!IS_STRUCT(LTYPE(tree))) {
- werror(E_STRUCT_UNION,".");
- goto errorTreeReturn ;
- }
- TTYPE(tree) = structElemType (LTYPE(tree),
- (tree->right->type == EX_VALUE ?
- tree->right->opval.val : NULL ),&tree->args);
- TETYPE(tree) = getSpec(TTYPE(tree));
- return tree ;
+ switch (tree->opval.op)
+ {
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* array node */
+ /*----------------------------*/
+ case '[':
+
+ /* first check if this is a array or a pointer */
+ if ((!IS_ARRAY (LTYPE (tree))) && (!IS_PTR (LTYPE (tree))))
+ {
+ werrorfl (tree->filename, tree->lineno, E_NEED_ARRAY_PTR, "[]");
+ goto errorTreeReturn;
+ }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* struct/union pointer */
- /*----------------------------*/
- case PTR_OP:
- /* if not pointer to a structure */
- if (!IS_PTR(LTYPE(tree))) {
- werror(E_PTR_REQD);
- goto errorTreeReturn ;
- }
+ /* check if the type of the idx */
+ if (!IS_INTEGRAL (RTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_IDX_NOT_INT);
+ goto errorTreeReturn;
+ }
- if (!IS_STRUCT(LTYPE(tree)->next)) {
- werror(E_STRUCT_UNION,"->");
- goto errorTreeReturn ;
- }
+ /* if the left is an rvalue then error */
+ if (LRVAL (tree))
+ {
+ werrorfl (tree->filename, tree->lineno, E_LVALUE_REQUIRED, "array access");
+ goto errorTreeReturn;
+ }
- TTYPE(tree) = structElemType (LTYPE(tree)->next,
- (tree->right->type == EX_VALUE ?
- tree->right->opval.val : NULL ),&tree->args);
- TETYPE(tree) = getSpec(TTYPE(tree));
- return tree ;
+ if (IS_LITERAL (RTYPE (tree)))
+ {
+ int arrayIndex = (int) ulFromVal (valFromType (RETYPE (tree)));
+ int arraySize = DCL_ELEM (LTYPE (tree));
+ if (arraySize && arrayIndex >= arraySize)
+ {
+ werrorfl (tree->filename, tree->lineno, W_IDX_OUT_OF_BOUNDS, arrayIndex, arraySize);
+ }
+ }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* ++/-- operation */
- /*----------------------------*/
- case INC_OP: /* incerement operator unary so left only */
- case DEC_OP:
- {
- sym_link *ltc = (tree->right ? RTYPE(tree) : LTYPE(tree) );
- COPYTYPE(TTYPE(tree),TETYPE(tree),ltc);
- if (!tree->initMode && IS_CONSTANT(TETYPE(tree)))
- werror(E_CODE_WRITE,"++/--");
+ RRVAL (tree) = 1;
+ COPYTYPE (TTYPE (tree), TETYPE (tree), LTYPE (tree)->next);
+ SPEC_CONST (TETYPE (tree)) |= DCL_PTR_CONST (LTYPE (tree));
+ return tree;
- if (tree->right)
- RLVAL(tree) = 1;
- else
- LLVAL(tree) = 1;
- return tree ;
- }
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* struct/union */
+ /*----------------------------*/
+ case '.':
+ /* if this is not a structure */
+ if (!IS_STRUCT (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_STRUCT_UNION, ".");
+ goto errorTreeReturn;
+ }
+ TTYPE (tree) = structElemType (LTYPE (tree),
+ (tree->right->type == EX_VALUE ?
+ tree->right->opval.val : NULL));
+ TETYPE (tree) = getSpec (TTYPE (tree));
+ return tree;
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* bitwise and */
- /*----------------------------*/
- case '&': /* can be unary */
- /* if right is NULL then unary operation */
- if ( tree->right ) /* not an unary operation */ {
-
- if (!IS_INTEGRAL(LTYPE(tree)) || !IS_INTEGRAL(RTYPE(tree))) {
- werror(E_BITWISE_OP);
- werror(E_CONTINUE,"left & right types are ");
- printTypeChain(LTYPE(tree),stderr);
- fprintf(stderr,",");
- printTypeChain(RTYPE(tree),stderr);
- fprintf(stderr,"\n");
- goto errorTreeReturn ;
- }
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* struct/union pointer */
+ /*----------------------------*/
+ case PTR_OP:
+ /* if not pointer to a structure */
+ if (!IS_PTR (LTYPE (tree)) && !IS_ARRAY (LTYPE(tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_PTR_REQD);
+ goto errorTreeReturn;
+ }
- /* if they are both literal */
- if (IS_LITERAL(RTYPE(tree)) && IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valBitwise (valFromType(LETYPE(tree)),
- valFromType(RETYPE(tree)),'&');
+ if (!IS_STRUCT (LTYPE (tree)->next))
+ {
+ werrorfl (tree->filename, tree->lineno, E_STRUCT_UNION, "->");
+ goto errorTreeReturn;
+ }
- tree->right = tree->left = NULL;
- TETYPE(tree) = tree->opval.val->etype ;
- TTYPE(tree) = tree->opval.val->type;
- return tree ;
+ TTYPE (tree) = structElemType (LTYPE (tree)->next,
+ (tree->right->type == EX_VALUE ?
+ tree->right->opval.val : NULL));
+ TETYPE (tree) = getSpec (TTYPE (tree));
+
+ /* adjust the storage class */
+ switch (DCL_TYPE(tree->left->ftype)) {
+ case POINTER:
+ SPEC_SCLS(TETYPE(tree)) = S_DATA;
+ break;
+ case FPOINTER:
+ SPEC_SCLS(TETYPE(tree)) = S_XDATA;
+ break;
+ case CPOINTER:
+ SPEC_SCLS(TETYPE(tree)) = S_CODE;
+ break;
+ case GPOINTER:
+ SPEC_SCLS (TETYPE (tree)) = 0;
+ break;
+ case PPOINTER:
+ SPEC_SCLS(TETYPE(tree)) = S_XSTACK;
+ break;
+ case IPOINTER:
+ SPEC_SCLS(TETYPE(tree)) = S_IDATA;
+ break;
+ case EEPPOINTER:
+ SPEC_SCLS(TETYPE(tree)) = S_EEPROM;
+ break;
+ case UPOINTER:
+ SPEC_SCLS (TETYPE (tree)) = 0;
+ break;
+ case ARRAY:
+ case FUNCTION:
+ break;
}
- /* see if this is a GETHBIT operation if yes
- then return that */
+ /* This breaks with extern declarations, bitfields, and perhaps other */
+ /* cases (gcse). Let's leave this optimization disabled for now and */
+ /* ponder if there's a safe way to do this. -- EEP */
+ #if 0
+ if (IS_ADDRESS_OF_OP (tree->left) && IS_AST_SYM_VALUE(tree->left->left)
+ && SPEC_ABSA (AST_SYMBOL (tree->left->left)->etype))
+ {
+ /* If defined struct type at addr var
+ then rewrite (&struct var)->member
+ as temp
+ and define membertype at (addr+offsetof(struct var,member)) temp
+ */
+ symbol *sym;
+ symbol *element = getStructElement (SPEC_STRUCT (LETYPE(tree)),
+ AST_SYMBOL(tree->right));
+
+ sym = newSymbol(genSymName (0), 0);
+ sym->type = TTYPE (tree);
+ sym->etype = getSpec(sym->type);
+ sym->lineDef = tree->lineno;
+ sym->cdef = 1;
+ sym->isref = 1;
+ SPEC_STAT (sym->etype) = 1;
+ SPEC_ADDR (sym->etype) = SPEC_ADDR (AST_SYMBOL (tree->left->left)->etype)
+ + element->offset;
+ SPEC_ABSA(sym->etype) = 1;
+ addSym (SymbolTab, sym, sym->name, 0, 0, 0);
+ allocGlobal (sym);
+
+ AST_VALUE (tree) = symbolVal(sym);
+ TLVAL (tree) = 1;
+ TRVAL (tree) = 0;
+ tree->type = EX_VALUE;
+ tree->left = NULL;
+ tree->right = NULL;
+ }
+ #endif
+
+ return tree;
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* ++/-- operation */
+ /*----------------------------*/
+ case INC_OP:
+ case DEC_OP:
{
- ast *otree = optimizeGetHbit(tree);
+ sym_link *ltc = (tree->right ? RTYPE (tree) : LTYPE (tree));
+ COPYTYPE (TTYPE (tree), TETYPE (tree), ltc);
+ if (!tree->initMode && IS_CONSTANT(TTYPE(tree)))
+ werrorfl (tree->filename, tree->lineno, E_CODE_WRITE, tree->opval.op==INC_OP ? "++" : "--");
- if (otree != tree)
- return decorateType(otree);
+ if (tree->right)
+ RLVAL (tree) = 1;
+ else
+ LLVAL (tree) = 1;
+ return tree;
}
- /* if right or left is literal then result of that type*/
- if (IS_LITERAL(RTYPE(tree))) {
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* bitwise and */
+ /*----------------------------*/
+ case '&': /* can be unary */
+ /* if right is NULL then unary operation */
+ if (tree->right) /* not an unary operation */
+ {
- TTYPE(tree) = copyLinkChain(RTYPE(tree));
- TETYPE(tree) = getSpec(TTYPE(tree));
- SPEC_SCLS(TETYPE(tree)) = S_AUTO;
- }
- else {
- if (IS_LITERAL(LTYPE(tree))) {
- TTYPE(tree) = copyLinkChain(LTYPE(tree));
- TETYPE(tree) = getSpec(TTYPE(tree));
- SPEC_SCLS(TETYPE(tree)) = S_AUTO;
+ if (!IS_INTEGRAL (LTYPE (tree)) || !IS_INTEGRAL (RTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_BITWISE_OP);
+ werrorfl (tree->filename, tree->lineno, W_CONTINUE, "left & right types are ");
+ printTypeChain (LTYPE (tree), stderr);
+ fprintf (stderr, ",");
+ printTypeChain (RTYPE (tree), stderr);
+ fprintf (stderr, "\n");
+ goto errorTreeReturn;
+ }
+
+ /* if they are both literal */
+ if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val = valBitwise (valFromType (LETYPE (tree)),
+ valFromType (RETYPE (tree)), '&');
+
+ tree->right = tree->left = NULL;
+ TETYPE (tree) = tree->opval.val->etype;
+ TTYPE (tree) = tree->opval.val->type;
+ return tree;
+ }
+
+ /* see if this is a GETHBIT operation if yes
+ then return that */
+ {
+ ast *otree = optimizeGetHbit (tree, resultType);
+
+ if (otree != tree)
+ return decorateType (otree, RESULT_TYPE_NONE);
+ }
+
+ /* see if this is a GETABIT operation if yes
+ then return that */
+ {
+ ast *otree = optimizeGetAbit (tree, resultType);
+
+ if (otree != tree)
+ return decorateType (otree, RESULT_TYPE_NONE);
+ }
+
+ /* see if this is a GETBYTE operation if yes
+ then return that */
+ {
+ ast *otree = optimizeGetByte (tree, resultType);
+
+ if (otree != tree)
+ return decorateType (otree, RESULT_TYPE_NONE);
+ }
+
+ /* see if this is a GETWORD operation if yes
+ then return that */
+ {
+ ast *otree = optimizeGetWord (tree, resultType);
+
+ if (otree != tree)
+ return decorateType (otree, RESULT_TYPE_NONE);
+ }
+
+ /* if left is a literal exchange left & right */
+ if (IS_LITERAL (LTYPE (tree)))
+ {
+ ast *tTree = tree->left;
+ tree->left = tree->right;
+ tree->right = tTree;
+ }
+
+ /* if right is a literal and */
+ /* we can find a 2nd literal in an and-tree then */
+ /* rearrange the tree */
+ if (IS_LITERAL (RTYPE (tree)))
+ {
+ ast *parent;
+ ast *litTree = searchLitOp (tree, &parent, "&");
+ if (litTree)
+ {
+ DEBUG_CF("&")
+ ast *tTree = litTree->left;
+ litTree->left = tree->right;
+ tree->right = tTree;
+ /* both operands in litTree are literal now */
+ decorateType (parent, resultType);
+ }
+ }
+
+ LRVAL (tree) = RRVAL (tree) = 1;
+
+ TTYPE (tree) = computeType (LTYPE (tree),
+ RTYPE (tree),
+ resultType,
+ tree->opval.op);
+ TETYPE (tree) = getSpec (TTYPE (tree));
+
+ return tree;
+ }
- }
- else {
- TTYPE(tree) =
- computeType (LTYPE(tree), RTYPE(tree));
- TETYPE(tree) = getSpec(TTYPE(tree));
- }
- }
- LRVAL(tree) = RRVAL(tree) = 1;
- return tree ;
- }
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* address of */
+ /*----------------------------*/
+ p = newLink (DECLARATOR);
+ /* if bit field then error */
+ if (IS_BITVAR (tree->left->etype))
+ {
+ werrorfl (tree->filename, tree->lineno, E_ILLEGAL_ADDR, "address of bit variable");
+ goto errorTreeReturn;
+ }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* address of */
- /*----------------------------*/
- p = newLink();
- p->class = DECLARATOR;
- /* if bit field then error */
- if (IS_BITVAR(tree->left->etype)) {
- werror (E_ILLEGAL_ADDR,"addrress of bit variable");
- goto errorTreeReturn ;
- }
+ if (LETYPE(tree) && SPEC_SCLS (tree->left->etype) == S_REGISTER)
+ {
+ werrorfl (tree->filename, tree->lineno, E_ILLEGAL_ADDR, "address of register variable");
+ goto errorTreeReturn;
+ }
- if (SPEC_SCLS(tree->left->etype)== S_REGISTER ) {
- werror (E_ILLEGAL_ADDR,"address of register variable");
- goto errorTreeReturn;
- }
+ if (IS_FUNC (LTYPE (tree)))
+ {
+ // this ought to be ignored
+ return (tree->left);
+ }
- if (IS_FUNC(LTYPE(tree))) {
- werror(E_ILLEGAL_ADDR,"address of function");
- goto errorTreeReturn ;
- }
+ if (IS_LITERAL(LTYPE(tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_ILLEGAL_ADDR, "address of literal");
+ goto errorTreeReturn;
+ }
- if (LRVAL(tree)) {
- werror(E_LVALUE_REQUIRED,"address of");
- goto errorTreeReturn ;
- }
- if (SPEC_SCLS(tree->left->etype) == S_CODE) {
- DCL_TYPE(p) = CPOINTER ;
- DCL_PTR_CONST(p) = port->mem.code_ro;
- }
- else
- if (SPEC_SCLS(tree->left->etype) == S_XDATA)
- DCL_TYPE(p) = FPOINTER;
- else
- if (SPEC_SCLS(tree->left->etype) == S_XSTACK )
- DCL_TYPE(p) = PPOINTER ;
- else
- if (SPEC_SCLS(tree->left->etype) == S_IDATA)
- DCL_TYPE(p) = IPOINTER ;
- else
- if (SPEC_SCLS(tree->left->etype) == S_EEPROM)
- DCL_TYPE(p) = EEPPOINTER ;
+ if (LRVAL (tree))
+ {
+ werrorfl (tree->filename, tree->lineno, E_LVALUE_REQUIRED, "address of");
+ goto errorTreeReturn;
+ }
+ if (!LETYPE (tree))
+ DCL_TYPE (p) = POINTER;
+ else if (SPEC_SCLS (tree->left->etype) == S_CODE)
+ DCL_TYPE (p) = CPOINTER;
+ else if (SPEC_SCLS (tree->left->etype) == S_XDATA)
+ DCL_TYPE (p) = FPOINTER;
+ else if (SPEC_SCLS (tree->left->etype) == S_XSTACK)
+ DCL_TYPE (p) = PPOINTER;
+ else if (SPEC_SCLS (tree->left->etype) == S_IDATA)
+ DCL_TYPE (p) = IPOINTER;
+ else if (SPEC_SCLS (tree->left->etype) == S_EEPROM)
+ DCL_TYPE (p) = EEPPOINTER;
+ else if (SPEC_OCLS(tree->left->etype))
+ DCL_TYPE (p) = PTR_TYPE(SPEC_OCLS(tree->left->etype));
else
- DCL_TYPE(p) = POINTER ;
-
- if (IS_AST_SYM_VALUE(tree->left)) {
- AST_SYMBOL(tree->left)->addrtaken = 1;
- AST_SYMBOL(tree->left)->allocreq = 1;
- }
+ DCL_TYPE (p) = POINTER;
- p->next = LTYPE(tree);
- TTYPE(tree) = p;
- TETYPE(tree) = getSpec(TTYPE(tree));
- DCL_PTR_CONST(p) = SPEC_CONST(TETYPE(tree));
- DCL_PTR_VOLATILE(p) = SPEC_VOLATILE(TETYPE(tree));
- LLVAL(tree) = 1;
- TLVAL(tree) = 1;
- return tree ;
+ if (IS_AST_SYM_VALUE (tree->left))
+ {
+ AST_SYMBOL (tree->left)->addrtaken = 1;
+ AST_SYMBOL (tree->left)->allocreq = 1;
+ }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* bitwise or */
- /*----------------------------*/
- case '|':
- /* if the rewrite succeeds then don't go any furthur */
- {
- ast *wtree = optimizeRRCRLC ( tree );
- if (wtree != tree)
- return decorateType(wtree) ;
- }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* bitwise xor */
- /*----------------------------*/
- case '^':
- if (!IS_INTEGRAL(LTYPE(tree)) || !IS_INTEGRAL(RTYPE(tree))) {
- werror(E_BITWISE_OP);
- werror(E_CONTINUE,"left & right types are ");
- printTypeChain(LTYPE(tree),stderr);
- fprintf(stderr,",");
- printTypeChain(RTYPE(tree),stderr);
- fprintf(stderr,"\n");
- goto errorTreeReturn ;
- }
+ p->next = LTYPE (tree);
+ TTYPE (tree) = p;
+ TETYPE (tree) = getSpec (TTYPE (tree));
+ LLVAL (tree) = 1;
+ TLVAL (tree) = 1;
- /* if they are both literal then */
- /* rewrite the tree */
- if (IS_LITERAL(RTYPE(tree)) && IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valBitwise (valFromType(LETYPE(tree)),
- valFromType(RETYPE(tree)),
- tree->opval.op);
- tree->right = tree->left = NULL;
- TETYPE(tree) = tree->opval.val->etype;
- TTYPE(tree) = tree->opval.val->type;
- return tree ;
- }
- LRVAL(tree) = RRVAL(tree) = 1;
- TETYPE(tree) = getSpec (TTYPE(tree) =
- computeType(LTYPE(tree),
- RTYPE(tree)));
+ #if 0
+ if (IS_AST_OP (tree->left) && tree->left->opval.op == PTR_OP
+ && IS_AST_VALUE (tree->left->left) && !IS_AST_SYM_VALUE (tree->left->left))
+ {
+ symbol *element = getStructElement (SPEC_STRUCT (LETYPE(tree->left)),
+ AST_SYMBOL(tree->left->right));
+ AST_VALUE(tree) = valPlus(AST_VALUE(tree->left->left),
+ valueFromLit(element->offset));
+ tree->left = NULL;
+ tree->right = NULL;
+ tree->type = EX_VALUE;
+ tree->values.literalFromCast = 1;
+ }
+ #endif
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* division */
- /*----------------------------*/
- case '/':
- if (!IS_ARITHMETIC(LTYPE(tree)) || !IS_ARITHMETIC(RTYPE(tree))) {
- werror(E_INVALID_OP,"divide");
- goto errorTreeReturn ;
- }
- /* if they are both literal then */
- /* rewrite the tree */
- if (IS_LITERAL(RTYPE(tree)) && IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valDiv (valFromType(LETYPE(tree)),
- valFromType(RETYPE(tree)));
- tree->right = tree->left = NULL;
- TETYPE(tree) = getSpec(TTYPE(tree) =
- tree->opval.val->type);
- return tree ;
- }
- LRVAL(tree) = RRVAL(tree) = 1;
- TETYPE(tree) = getSpec (TTYPE(tree) =
- computeType(LTYPE(tree),
- RTYPE(tree)));
- return tree;
+ return tree;
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* modulus */
- /*----------------------------*/
- case '%':
- if (!IS_INTEGRAL(LTYPE(tree)) || !IS_INTEGRAL(RTYPE(tree))) {
- werror(E_BITWISE_OP);
- werror(E_CONTINUE,"left & right types are ");
- printTypeChain(LTYPE(tree),stderr);
- fprintf(stderr,",");
- printTypeChain(RTYPE(tree),stderr);
- fprintf(stderr,"\n");
- goto errorTreeReturn ;
- }
- /* if they are both literal then */
- /* rewrite the tree */
- if (IS_LITERAL(RTYPE(tree)) && IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valMod (valFromType(LETYPE(tree)),
- valFromType(RETYPE(tree)));
- tree->right = tree->left = NULL;
- TETYPE(tree) = getSpec(TTYPE(tree) =
- tree->opval.val->type);
- return tree ;
- }
- LRVAL(tree) = RRVAL(tree) = 1;
- TETYPE(tree) = getSpec (TTYPE(tree) =
- computeType(LTYPE(tree),
- RTYPE(tree)));
- return tree;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* bitwise or */
+ /*----------------------------*/
+ case '|':
+ /* if the rewrite succeeds then don't go any further */
+ {
+ ast *wtree = optimizeRRCRLC (tree);
+ if (wtree != tree)
+ return decorateType (wtree, RESULT_TYPE_NONE);
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* address dereference */
- /*----------------------------*/
- case '*': /* can be unary : if right is null then unary operation */
- if ( ! tree->right ) {
- if (!IS_PTR(LTYPE(tree)) && !IS_ARRAY(LTYPE(tree))) {
- werror(E_PTR_REQD);
- goto errorTreeReturn ;
+ wtree = optimizeSWAP (tree);
+ if (wtree != tree)
+ return decorateType (wtree, RESULT_TYPE_NONE);
}
- if (LRVAL(tree)) {
- werror(E_LVALUE_REQUIRED,"pointer deref");
- goto errorTreeReturn ;
- }
- TTYPE(tree) = copyLinkChain ((IS_PTR(LTYPE(tree)) || IS_ARRAY(LTYPE(tree))) ?
- LTYPE(tree)->next : NULL );
- TETYPE(tree) = getSpec(TTYPE(tree));
- tree->args = tree->left->args ;
- tree->hasVargs = tree->left->hasVargs ;
- SPEC_CONST(TETYPE(tree)) = DCL_PTR_CONST(LTYPE(tree));
- return tree ;
- }
+ /* if left is a literal exchange left & right */
+ if (IS_LITERAL (LTYPE (tree)))
+ {
+ ast *tTree = tree->left;
+ tree->left = tree->right;
+ tree->right = tTree;
+ }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* multiplication */
- /*----------------------------*/
- if (!IS_ARITHMETIC(LTYPE(tree)) || !IS_ARITHMETIC(RTYPE(tree))) {
- werror(E_INVALID_OP,"multiplication");
- goto errorTreeReturn ;
- }
+ /* if right is a literal and */
+ /* we can find a 2nd literal in an or-tree then */
+ /* rearrange the tree */
+ if (IS_LITERAL (RTYPE (tree)))
+ {
+ ast *parent;
+ ast *litTree = searchLitOp (tree, &parent, "|");
+ if (litTree)
+ {
+ DEBUG_CF("|")
+ ast *tTree = litTree->left;
+ litTree->left = tree->right;
+ tree->right = tTree;
+ /* both operands in tTree are literal now */
+ decorateType (parent, resultType);
+ }
+ }
+ /* fall through */
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* bitwise xor */
+ /*----------------------------*/
+ case '^':
+ if (!IS_INTEGRAL (LTYPE (tree)) || !IS_INTEGRAL (RTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_BITWISE_OP);
+ werrorfl (tree->filename, tree->lineno, W_CONTINUE, "left & right types are ");
+ printTypeChain (LTYPE (tree), stderr);
+ fprintf (stderr, ",");
+ printTypeChain (RTYPE (tree), stderr);
+ fprintf (stderr, "\n");
+ goto errorTreeReturn;
+ }
- /* if they are both literal then */
- /* rewrite the tree */
- if (IS_LITERAL(RTYPE(tree)) && IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valMult (valFromType(LETYPE(tree)),
- valFromType(RETYPE(tree)));
- tree->right = tree->left = NULL;
- TETYPE(tree) = getSpec(TTYPE(tree) =
- tree->opval.val->type);
- return tree ;
- }
+ /* if they are both literal then rewrite the tree */
+ if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val = valBitwise (valFromType (LETYPE (tree)),
+ valFromType (RETYPE (tree)),
+ tree->opval.op);
+ tree->right = tree->left = NULL;
+ TETYPE (tree) = tree->opval.val->etype;
+ TTYPE (tree) = tree->opval.val->type;
+ return tree;
+ }
- /* if left is a literal exchange left & right */
- if (IS_LITERAL(LTYPE(tree))) {
- ast *tTree = tree->left ;
- tree->left = tree->right ;
- tree->right= tTree ;
- }
+ /* if left is a literal exchange left & right */
+ if (IS_LITERAL (LTYPE (tree)))
+ {
+ ast *tTree = tree->left;
+ tree->left = tree->right;
+ tree->right = tTree;
+ }
- LRVAL(tree) = RRVAL(tree) = 1;
- TETYPE(tree) = getSpec (TTYPE(tree) =
- computeType(LTYPE(tree),
- RTYPE(tree)));
- return tree ;
+ /* if right is a literal and */
+ /* we can find a 2nd literal in a xor-tree then */
+ /* rearrange the tree */
+ if (IS_LITERAL (RTYPE (tree)) &&
+ tree->opval.op == '^') /* the same source is used by 'bitwise or' */
+ {
+ ast *parent;
+ ast *litTree = searchLitOp (tree, &parent, "^");
+ if (litTree)
+ {
+ DEBUG_CF("^")
+ ast *tTree = litTree->left;
+ litTree->left = tree->right;
+ tree->right = tTree;
+ /* both operands in litTree are literal now */
+ decorateType (parent, resultType);
+ }
+ }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* unary '+' operator */
- /*----------------------------*/
- case '+' :
- /* if unary plus */
- if ( ! tree->right ) {
- if (!IS_INTEGRAL(LTYPE(tree))) {
- werror(E_UNARY_OP,'+');
- goto errorTreeReturn ;
- }
+ LRVAL (tree) = RRVAL (tree) = 1;
- /* if left is a literal then do it */
- if (IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valFromType(LETYPE(tree));
- tree->left = NULL ;
- TETYPE(tree) = TTYPE(tree) = tree->opval.val->type;
- return tree ;
- }
- LRVAL(tree) = 1;
- COPYTYPE(TTYPE(tree),TETYPE(tree),LTYPE(tree));
- return tree ;
- }
+ TTYPE (tree) = computeType (LTYPE (tree),
+ RTYPE (tree),
+ resultType,
+ tree->opval.op);
+ TETYPE (tree) = getSpec (TTYPE (tree));
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* addition */
- /*----------------------------*/
+ return tree;
- /* this is not a unary operation */
- /* if both pointers then problem */
- if ((IS_PTR(LTYPE(tree)) || IS_ARRAY(LTYPE(tree))) &&
- (IS_PTR(RTYPE(tree)) || IS_ARRAY(RTYPE(tree)))) {
- werror(E_PTR_PLUS_PTR);
- goto errorTreeReturn ;
- }
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* division */
+ /*----------------------------*/
+ case '/':
+ if (!IS_ARITHMETIC (LTYPE (tree)) || !IS_ARITHMETIC (RTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_INVALID_OP, "divide");
+ goto errorTreeReturn;
+ }
+ /* if they are both literal then */
+ /* rewrite the tree */
+ if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val = valDiv (valFromType (LETYPE (tree)),
+ valFromType (RETYPE (tree)));
+ tree->right = tree->left = NULL;
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ tree->opval.val->type);
+ return tree;
+ }
- if (!IS_ARITHMETIC(LTYPE(tree)) &&
- !IS_PTR(LTYPE(tree)) && !IS_ARRAY(LTYPE(tree))) {
- werror(E_PLUS_INVALID,"+");
- goto errorTreeReturn ;
- }
+ LRVAL (tree) = RRVAL (tree) = 1;
- if (!IS_ARITHMETIC(RTYPE(tree)) &&
- !IS_PTR(RTYPE(tree)) && !IS_ARRAY(RTYPE(tree))) {
- werror(E_PLUS_INVALID,"+");
- goto errorTreeReturn;
- }
- /* if they are both literal then */
- /* rewrite the tree */
- if (IS_LITERAL(RTYPE(tree)) && IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valPlus (valFromType(LETYPE(tree)),
- valFromType(RETYPE(tree)));
- tree->right = tree->left = NULL;
- TETYPE(tree) = getSpec(TTYPE(tree) =
- tree->opval.val->type);
- return tree ;
- }
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ computeType (LTYPE (tree),
+ RTYPE (tree),
+ resultType,
+ tree->opval.op));
- /* if the right is a pointer or left is a literal
- xchange left & right */
- if (IS_ARRAY(RTYPE(tree)) ||
- IS_PTR(RTYPE(tree)) ||
- IS_LITERAL(LTYPE(tree))) {
- ast *tTree = tree->left ;
- tree->left = tree->right ;
- tree->right= tTree ;
- }
+ /* if right is a literal and */
+ /* left is also a division by a literal then */
+ /* rearrange the tree */
+ if (IS_LITERAL (RTYPE (tree))
+ /* avoid infinite loop */
+ && (TYPE_TARGET_ULONG) ulFromVal (tree->right->opval.val) != 1)
+ {
+ ast *parent;
+ ast *litTree = searchLitOp (tree, &parent, "/");
+ if (litTree)
+ {
+ if (IS_LITERAL (RTYPE (litTree)))
+ {
+ /* foo_div */
+ DEBUG_CF("div r")
+ litTree->right = newNode ('*',
+ litTree->right,
+ copyAst (tree->right));
+ litTree->right->filename = tree->filename;
+ litTree->right->lineno = tree->lineno;
+
+ tree->right->opval.val = constCharVal (1);
+ decorateType (parent, resultType);
+ }
+ else
+ {
+ /* litTree->left is literal: no gcse possible.
+ We can't call decorateType(parent, RESULT_TYPE_NONE), because
+ this would cause an infinit loop. */
+ parent->decorated = 1;
+ decorateType (litTree, resultType);
+ }
+ }
+ }
- LRVAL(tree) = RRVAL(tree) = 1;
- /* if the left is a pointer */
- if (IS_PTR(LTYPE(tree)))
- TETYPE(tree) = getSpec(TTYPE(tree) =
- LTYPE(tree));
- else
- TETYPE(tree) = getSpec(TTYPE(tree) =
- computeType(LTYPE(tree),
- RTYPE(tree)));
- return tree ;
+ return tree;
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* unary '-' */
- /*----------------------------*/
- case '-' : /* can be unary */
- /* if right is null then unary */
- if ( ! tree->right ) {
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* modulus */
+ /*----------------------------*/
+ case '%':
+ if (!IS_INTEGRAL (LTYPE (tree)) || !IS_INTEGRAL (RTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_BITWISE_OP);
+ werrorfl (tree->filename, tree->lineno, W_CONTINUE, "left & right types are ");
+ printTypeChain (LTYPE (tree), stderr);
+ fprintf (stderr, ",");
+ printTypeChain (RTYPE (tree), stderr);
+ fprintf (stderr, "\n");
+ goto errorTreeReturn;
+ }
+ /* if they are both literal then */
+ /* rewrite the tree */
+ if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val = valMod (valFromType (LETYPE (tree)),
+ valFromType (RETYPE (tree)));
+ tree->right = tree->left = NULL;
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ tree->opval.val->type);
+ return tree;
+ }
+ LRVAL (tree) = RRVAL (tree) = 1;
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ computeType (LTYPE (tree),
+ RTYPE (tree),
+ resultType,
+ tree->opval.op));
+ return tree;
- if (!IS_ARITHMETIC(LTYPE(tree))) {
- werror(E_UNARY_OP,tree->opval.op);
- goto errorTreeReturn ;
- }
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* address dereference */
+ /*----------------------------*/
+ case '*': /* can be unary : if right is null then unary operation */
+ if (!tree->right)
+ {
+ if (!IS_PTR (LTYPE (tree)) && !IS_ARRAY (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_PTR_REQD);
+ goto errorTreeReturn;
+ }
+
+ if (LRVAL (tree))
+ {
+ werrorfl (tree->filename, tree->lineno, E_LVALUE_REQUIRED, "pointer deref");
+ goto errorTreeReturn;
+ }
+ if (IS_ADDRESS_OF_OP (tree->left))
+ {
+ /* replace *&obj with obj */
+ return tree->left->left;
+ }
+ TTYPE (tree) = copyLinkChain (LTYPE (tree)->next);
+ TETYPE (tree) = getSpec (TTYPE (tree));
+ /* adjust the storage class */
+ switch (DCL_TYPE(tree->left->ftype)) {
+ case POINTER:
+ SPEC_SCLS(TETYPE(tree)) = S_DATA;
+ break;
+ case FPOINTER:
+ SPEC_SCLS(TETYPE(tree)) = S_XDATA;
+ break;
+ case CPOINTER:
+ SPEC_SCLS(TETYPE(tree)) = S_CODE;
+ break;
+ case GPOINTER:
+ SPEC_SCLS (TETYPE (tree)) = 0;
+ break;
+ case PPOINTER:
+ SPEC_SCLS(TETYPE(tree)) = S_XSTACK;
+ break;
+ case IPOINTER:
+ SPEC_SCLS(TETYPE(tree)) = S_IDATA;
+ break;
+ case EEPPOINTER:
+ SPEC_SCLS(TETYPE(tree)) = S_EEPROM;
+ break;
+ case UPOINTER:
+ SPEC_SCLS (TETYPE (tree)) = 0;
+ break;
+ case ARRAY:
+ case FUNCTION:
+ break;
+ }
+ return tree;
+ }
- /* if left is a literal then do it */
- if (IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valUnaryPM(valFromType(LETYPE(tree)));
- tree->left = NULL ;
- TETYPE(tree) = TTYPE(tree) = tree->opval.val->type;
- return tree ;
- }
- LRVAL(tree) = 1;
- TTYPE(tree) = LTYPE(tree);
- return tree ;
- }
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* multiplication */
+ /*----------------------------*/
+ if (!IS_ARITHMETIC (LTYPE (tree)) || !IS_ARITHMETIC (RTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_INVALID_OP, "multiplication");
+ goto errorTreeReturn;
+ }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* subtraction */
- /*----------------------------*/
+ /* if they are both literal then */
+ /* rewrite the tree */
+ if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val = valMult (valFromType (LETYPE (tree)),
+ valFromType (RETYPE (tree)));
+ tree->right = tree->left = NULL;
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ tree->opval.val->type);
+ return tree;
+ }
- if (!(IS_PTR(LTYPE(tree)) ||
- IS_ARRAY(LTYPE(tree)) ||
- IS_ARITHMETIC(LTYPE(tree)))) {
- werror(E_PLUS_INVALID,"-");
- goto errorTreeReturn ;
- }
+ /* if left is a literal exchange left & right */
+ if (IS_LITERAL (LTYPE (tree)))
+ {
+ ast *tTree = tree->left;
+ tree->left = tree->right;
+ tree->right = tTree;
+ }
- if (!(IS_PTR(RTYPE(tree)) ||
- IS_ARRAY(RTYPE(tree)) ||
- IS_ARITHMETIC(RTYPE(tree)))) {
- werror(E_PLUS_INVALID,"-");
- goto errorTreeReturn ;
- }
+ /* if right is a literal and */
+ /* we can find a 2nd literal in a mul-tree then */
+ /* rearrange the tree */
+ if (IS_LITERAL (RTYPE (tree)))
+ {
+ ast *parent;
+ ast *litTree = searchLitOp (tree, &parent, "*");
+ if (litTree)
+ {
+ DEBUG_CF("mul")
+ ast *tTree = litTree->left;
+ litTree->left = tree->right;
+ tree->right = tTree;
+ /* both operands in litTree are literal now */
+ decorateType (parent, resultType);
+ }
+ }
- if ( (IS_PTR(LTYPE(tree)) || IS_ARRAY(LTYPE(tree))) &&
- ! (IS_PTR(RTYPE(tree)) || IS_ARRAY(RTYPE(tree)) ||
- IS_INTEGRAL(RTYPE(tree))) ) {
- werror(E_PLUS_INVALID,"-");
- goto errorTreeReturn ;
- }
+ LRVAL (tree) = RRVAL (tree) = 1;
+ tree->left = addCast (tree->left, resultTypeProp, FALSE);
+ tree->right = addCast (tree->right, resultTypeProp, FALSE);
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ computeType (LTYPE (tree),
+ RTYPE (tree),
+ resultType,
+ tree->opval.op));
- /* if they are both literal then */
- /* rewrite the tree */
- if (IS_LITERAL(RTYPE(tree)) && IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valMinus (valFromType(LETYPE(tree)),
- valFromType(RETYPE(tree)));
- tree->right = tree->left = NULL;
- TETYPE(tree) = getSpec(TTYPE(tree) =
- tree->opval.val->type);
- return tree ;
- }
+ return tree;
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* unary '+' operator */
+ /*----------------------------*/
+ case '+':
+ /* if unary plus */
+ if (!tree->right)
+ {
+ if (!IS_ARITHMETIC (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_UNARY_OP, '+');
+ goto errorTreeReturn;
+ }
+
+ /* if left is a literal then do it */
+ if (IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val = valFromType (LETYPE (tree));
+ tree->left = NULL;
+ TETYPE (tree) = TTYPE (tree) = tree->opval.val->type;
+ return tree;
+ }
+ LRVAL (tree) = 1;
+ COPYTYPE (TTYPE (tree), TETYPE (tree), LTYPE (tree));
+ return tree;
+ }
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* addition */
+ /*----------------------------*/
+
+ /* this is not a unary operation */
+ /* if both pointers then problem */
+ if ((IS_PTR (LTYPE (tree)) || IS_ARRAY (LTYPE (tree))) &&
+ (IS_PTR (RTYPE (tree)) || IS_ARRAY (RTYPE (tree))))
+ {
+ werrorfl (tree->filename, tree->lineno, E_PTR_PLUS_PTR);
+ goto errorTreeReturn;
+ }
+
+ if (!IS_ARITHMETIC (LTYPE (tree)) &&
+ !IS_PTR (LTYPE (tree)) && !IS_ARRAY (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_PLUS_INVALID, "+");
+ goto errorTreeReturn;
+ }
+
+ if (!IS_ARITHMETIC (RTYPE (tree)) &&
+ !IS_PTR (RTYPE (tree)) && !IS_ARRAY (RTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_PLUS_INVALID, "+");
+ goto errorTreeReturn;
+ }
+ /* if they are both literal then */
+ /* rewrite the tree */
+ if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->left = addCast (tree->left, resultTypeProp, TRUE);
+ tree->right = addCast (tree->right, resultTypeProp, TRUE);
+ tree->opval.val = valPlus (valFromType (LETYPE (tree)),
+ valFromType (RETYPE (tree)));
+ tree->right = tree->left = NULL;
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ tree->opval.val->type);
+ return tree;
+ }
+
+ /* if the right is a pointer or left is a literal
+ xchange left & right */
+ if (IS_ARRAY (RTYPE (tree)) ||
+ IS_PTR (RTYPE (tree)) ||
+ IS_LITERAL (LTYPE (tree)))
+ {
+ ast *tTree = tree->left;
+ tree->left = tree->right;
+ tree->right = tTree;
+ }
+
+ /* if right is a literal and */
+ /* left is also an addition/subtraction with a literal then */
+ /* rearrange the tree */
+ if (IS_LITERAL (RTYPE (tree)))
+ {
+ ast *litTree, *parent;
+ litTree = searchLitOp (tree, &parent, "+-");
+ if (litTree)
+ {
+ if (litTree->opval.op == '+')
+ {
+ /* foo_aa */
+ DEBUG_CF("+ 1 AA")
+ ast *tTree = litTree->left;
+ litTree->left = tree->right;
+ tree->right = tree->left;
+ tree->left = tTree;
+ }
+ else if (litTree->opval.op == '-')
+ {
+ if (IS_LITERAL (RTYPE (litTree)))
+ {
+ DEBUG_CF("+ 2 ASR")
+ /* foo_asr */
+ ast *tTree = litTree->left;
+ litTree->left = tree->right;
+ tree->right = tTree;
+ }
+ else
+ {
+ DEBUG_CF("+ 3 ASL")
+ /* foo_asl */
+ ast *tTree = litTree->right;
+ litTree->right = tree->right;
+ tree->right = tTree;
+ litTree->opval.op = '+';
+ tree->opval.op = '-';
+ }
+ }
+ decorateType (parent, resultType);
+ }
+ }
+
+ LRVAL (tree) = RRVAL (tree) = 1;
+ /* if the left is a pointer */
+ if (IS_PTR (LTYPE (tree)) || IS_AGGREGATE (LTYPE (tree)) )
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ LTYPE (tree));
+ else
+ {
+ tree->left = addCast (tree->left, resultTypeProp, TRUE);
+ tree->right = addCast (tree->right, resultTypeProp, TRUE);
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ computeType (LTYPE (tree),
+ RTYPE (tree),
+ resultType,
+ tree->opval.op));
+ }
- /* if the left & right are equal then zero */
- if (isAstEqual(tree->left,tree->right)) {
- tree->type = EX_VALUE;
- tree->left = tree->right = NULL;
- tree->opval.val = constVal("0");
- TETYPE(tree) = TTYPE(tree) = tree->opval.val->type;
return tree;
- }
- /* if both of them are pointers or arrays then */
- /* the result is going to be an integer */
- if (( IS_ARRAY(LTYPE(tree)) || IS_PTR(LTYPE(tree))) &&
- ( IS_ARRAY(RTYPE(tree)) || IS_PTR(RTYPE(tree))))
- TETYPE(tree) = TTYPE(tree) = newIntLink();
- else
- /* if only the left is a pointer */
- /* then result is a pointer */
- if (IS_PTR(LTYPE(tree)) || IS_ARRAY(LTYPE(tree)))
- TETYPE(tree) = getSpec(TTYPE(tree) =
- LTYPE(tree));
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* unary '-' */
+ /*----------------------------*/
+ case '-': /* can be unary */
+ /* if right is null then unary */
+ if (!tree->right)
+ {
+
+ if (!IS_ARITHMETIC (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_UNARY_OP, tree->opval.op);
+ goto errorTreeReturn;
+ }
+
+ /* if left is a literal then do it */
+ if (IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val = valUnaryPM (valFromType (LETYPE (tree)));
+ tree->left = NULL;
+ TETYPE (tree) = TTYPE (tree) = tree->opval.val->type;
+ return tree;
+ }
+ tree->left = addCast (tree->left, resultTypeProp, TRUE);
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ computeType (LTYPE (tree),
+ NULL,
+ resultType,
+ tree->opval.op));
+ LRVAL (tree) = 1;
+ return tree;
+ }
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* subtraction */
+ /*----------------------------*/
+
+ if (!(IS_PTR (LTYPE (tree)) ||
+ IS_ARRAY (LTYPE (tree)) ||
+ IS_ARITHMETIC (LTYPE (tree))))
+ {
+ werrorfl (tree->filename, tree->lineno, E_PLUS_INVALID, "-");
+ goto errorTreeReturn;
+ }
+
+ if (!(IS_PTR (RTYPE (tree)) ||
+ IS_ARRAY (RTYPE (tree)) ||
+ IS_ARITHMETIC (RTYPE (tree))))
+ {
+ werrorfl (tree->filename, tree->lineno, E_PLUS_INVALID, "-");
+ goto errorTreeReturn;
+ }
+
+ if ((IS_PTR (LTYPE (tree)) || IS_ARRAY (LTYPE (tree))) &&
+ !(IS_PTR (RTYPE (tree)) || IS_ARRAY (RTYPE (tree)) ||
+ IS_INTEGRAL (RTYPE (tree))))
+ {
+ werrorfl (tree->filename, tree->lineno, E_PLUS_INVALID, "-");
+ goto errorTreeReturn;
+ }
+
+ /* if they are both literal then */
+ /* rewrite the tree */
+ if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->left = addCast (tree->left, resultTypeProp, TRUE);
+ tree->right = addCast (tree->right, resultTypeProp, TRUE);
+ tree->opval.val = valMinus (valFromType (LETYPE (tree)),
+ valFromType (RETYPE (tree)));
+ tree->right = tree->left = NULL;
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ tree->opval.val->type);
+ return tree;
+ }
+
+ /* if the left & right are equal then zero */
+ if (isAstEqual (tree->left, tree->right))
+ {
+ tree->type = EX_VALUE;
+ tree->left = tree->right = NULL;
+ tree->opval.val = constCharVal (0);
+ TETYPE (tree) = TTYPE (tree) = tree->opval.val->type;
+ return tree;
+ }
+
+ /* if both of them are pointers or arrays then */
+ /* the result is going to be an integer */
+ if ((IS_ARRAY (LTYPE (tree)) || IS_PTR (LTYPE (tree))) &&
+ (IS_ARRAY (RTYPE (tree)) || IS_PTR (RTYPE (tree))))
+ TETYPE (tree) = TTYPE (tree) = newIntLink ();
+ else
+ /* if only the left is a pointer */
+ /* then result is a pointer */
+ if (IS_PTR (LTYPE (tree)) || IS_ARRAY (LTYPE (tree)))
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ LTYPE (tree));
else
- TETYPE(tree) = getSpec (TTYPE(tree) =
- computeType(LTYPE(tree),
- RTYPE(tree)));
- LRVAL(tree) = RRVAL(tree) = 1;
- return tree ;
+ {
+ tree->left = addCast (tree->left, resultTypeProp, TRUE);
+ tree->right = addCast (tree->right, resultTypeProp, TRUE);
+
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ computeType (LTYPE (tree),
+ RTYPE (tree),
+ resultType,
+ tree->opval.op));
+ }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* compliment */
- /*----------------------------*/
- case '~' :
- /* can be only integral type */
- if (!IS_INTEGRAL(LTYPE(tree))) {
- werror(E_UNARY_OP,tree->opval.op);
- goto errorTreeReturn ;
- }
+ LRVAL (tree) = RRVAL (tree) = 1;
- /* if left is a literal then do it */
- if (IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valComplement(valFromType(LETYPE(tree)));
- tree->left = NULL ;
- TETYPE(tree) = TTYPE(tree) = tree->opval.val->type;
- return tree ;
- }
- LRVAL(tree) = 1;
- COPYTYPE(TTYPE(tree),TETYPE(tree),LTYPE(tree));
- return tree ;
+ /* if right is a literal and */
+ /* left is also an addition/subtraction with a literal then */
+ /* rearrange the tree */
+ if (IS_LITERAL (RTYPE (tree))
+ /* avoid infinite loop */
+ && (TYPE_TARGET_ULONG) ulFromVal (tree->right->opval.val) != 0)
+ {
+ ast *litTree, *litParent;
+ litTree = searchLitOp (tree, &litParent, "+-");
+ if (litTree)
+ {
+ if (litTree->opval.op == '+')
+ {
+ /* foo_sa */
+ DEBUG_CF("- 1 SA")
+ ast *tTree = litTree->left;
+ litTree->left = litTree->right;
+ litTree->right = tree->right;
+ tree->right = tTree;
+ tree->opval.op = '+';
+ litTree->opval.op = '-';
+ }
+ else if (litTree->opval.op == '-')
+ {
+ if (IS_LITERAL (RTYPE (litTree)))
+ {
+ /* foo_ssr */
+ DEBUG_CF("- 2 SSR")
+ ast *tTree = litTree->left;
+ litTree->left = tree->right;
+ tree->right = litParent->left;
+ litParent->left = tTree;
+ litTree->opval.op = '+';
+
+ tree->decorated = 0;
+ decorateType (tree, resultType);
+ }
+ else
+ {
+ /* foo_ssl */
+ DEBUG_CF("- 3 SSL")
+ ast *tTree = litTree->right;
+ litTree->right = tree->right;
+ tree->right = tTree;
+ }
+ }
+ decorateType (litParent, resultType);
+ }
+ }
+ return tree;
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* not */
- /*----------------------------*/
- case '!' :
- /* can be pointer */
- if (!IS_ARITHMETIC(LTYPE(tree)) &&
- !IS_PTR(LTYPE(tree)) &&
- !IS_ARRAY(LTYPE(tree))) {
- werror(E_UNARY_OP,tree->opval.op);
- goto errorTreeReturn ;
- }
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* complement */
+ /*----------------------------*/
+ case '~':
+ /* can be only integral type */
+ if (!IS_INTEGRAL (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_UNARY_OP, tree->opval.op);
+ goto errorTreeReturn;
+ }
- /* if left is a literal then do it */
- if (IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valNot(valFromType(LETYPE(tree)));
- tree->left = NULL ;
- TETYPE(tree) = TTYPE(tree) = tree->opval.val->type;
- return tree ;
- }
- LRVAL(tree) = 1;
- TTYPE(tree) = TETYPE(tree) = newCharLink();
- return tree ;
+ /* if left is a literal then do it */
+ if (IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val = valComplement (valFromType (LETYPE (tree)));
+ tree->left = NULL;
+ TETYPE (tree) = TTYPE (tree) = tree->opval.val->type;
+ return addCast (tree, resultTypeProp, TRUE);
+ }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* shift */
- /*----------------------------*/
+ if (resultType == RESULT_TYPE_BIT &&
+ IS_UNSIGNED (tree->left->etype) &&
+ getSize (tree->left->etype) < INTSIZE)
+ {
+ /* promotion rules are responsible for this strange result:
+ bit -> int -> ~int -> bit
+ uchar -> int -> ~int -> bit
+ */
+ werrorfl (tree->filename, tree->lineno, W_COMPLEMENT);
+
+ /* optimize bit-result, even if we optimize a buggy source */
+ tree->type = EX_VALUE;
+ tree->opval.val = constCharVal (1);
+ }
+ else
+ tree->left = addCast (tree->left, resultTypeProp, TRUE);
+ LRVAL (tree) = 1;
+ COPYTYPE (TTYPE (tree), TETYPE (tree), LTYPE (tree));
+ return tree;
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* not */
+ /*----------------------------*/
+ case '!':
+ /* can be pointer */
+ if (!IS_ARITHMETIC (LTYPE (tree)) &&
+ !IS_PTR (LTYPE (tree)) &&
+ !IS_ARRAY (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_UNARY_OP, tree->opval.op);
+ goto errorTreeReturn;
+ }
+
+ /* if left is another '!' */
+ if (IS_AST_NOT_OPER (tree->left))
+ {
+ if ((resultType == RESULT_TYPE_IFX) || (resultType == RESULT_TYPE_BIT))
+ {
+ /* replace double '!!X' by 'X' */
+ return tree->left->left;
+ }
+ /* remove double '!!X' by 'X ? 1 : 0' */
+ tree->opval.op = '?';
+ tree->left = tree->left->left;
+ tree->right = newNode (':',
+ newAst_VALUE (constCharVal (1)),
+ newAst_VALUE (constCharVal (0)));
+ tree->right->filename = tree->filename;
+ tree->right->lineno = tree->lineno;
+ tree->decorated = 0;
+ return decorateType (tree, resultType);
+ }
+
+ /* if left is a literal then do it */
+ if (IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val = valNot (valFromType (LETYPE (tree)));
+ tree->left = NULL;
+ TETYPE (tree) = TTYPE (tree) = tree->opval.val->type;
+ return tree;
+ }
+ LRVAL (tree) = 1;
+ TTYPE (tree) = TETYPE (tree) = (resultTypeProp == RESULT_TYPE_BIT) ? newBoolLink() :newCharLink();
+ return tree;
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* shift */
+ /*----------------------------*/
case RRC:
case RLC:
- TTYPE(tree) = LTYPE(tree);
- TETYPE(tree) = LETYPE(tree);
- return tree ;
+ case SWAP:
+ TTYPE (tree) = LTYPE (tree);
+ TETYPE (tree) = LETYPE (tree);
+ return tree;
case GETHBIT:
- TTYPE(tree) = TETYPE(tree) = newCharLink();
- return tree;
+ case GETABIT:
+ TTYPE (tree) = TETYPE (tree) = (resultTypeProp == RESULT_TYPE_BIT) ? newBoolLink() :newCharLink();
+ return tree;
+
+ case GETBYTE:
+ TTYPE (tree) = TETYPE (tree) = newCharLink();
+ return tree;
+
+ case GETWORD:
+ TTYPE (tree) = TETYPE (tree) = newIntLink();
+ return tree;
case LEFT_OP:
case RIGHT_OP:
- if (!IS_INTEGRAL(LTYPE(tree)) || !IS_INTEGRAL(tree->left->etype)) {
- werror(E_SHIFT_OP_INVALID);
- werror(E_CONTINUE,"left & right types are ");
- printTypeChain(LTYPE(tree),stderr);
- fprintf(stderr,",");
- printTypeChain(RTYPE(tree),stderr);
- fprintf(stderr,"\n");
- goto errorTreeReturn ;
- }
+ if (!IS_INTEGRAL (LTYPE (tree)) || !IS_INTEGRAL (tree->left->etype))
+ {
+ werrorfl (tree->filename, tree->lineno, E_SHIFT_OP_INVALID);
+ werrorfl (tree->filename, tree->lineno, W_CONTINUE, "left & right types are ");
+ printTypeChain (LTYPE (tree), stderr);
+ fprintf (stderr, ",");
+ printTypeChain (RTYPE (tree), stderr);
+ fprintf (stderr, "\n");
+ goto errorTreeReturn;
+ }
- /* if they are both literal then */
- /* rewrite the tree */
- if (IS_LITERAL(RTYPE(tree)) && IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valShift (valFromType(LETYPE(tree)),
- valFromType(RETYPE(tree)),
- (tree->opval.op == LEFT_OP ? 1 : 0));
- tree->right = tree->left = NULL;
- TETYPE(tree) = getSpec(TTYPE(tree) =
- tree->opval.val->type);
- return tree ;
- }
- /* if only the right side is a literal & we are
- shifting more than size of the left operand then zero */
- if (IS_LITERAL(RTYPE(tree)) &&
- ((unsigned)floatFromVal( valFromType(RETYPE(tree)))) >=
- (getSize(LTYPE(tree))*8)) {
- werror(W_SHIFT_CHANGED,
- (tree->opval.op == LEFT_OP ? "left" : "right"));
- tree->type = EX_VALUE;
- tree->left = tree->right = NULL;
- tree->opval.val = constVal("0");
- TETYPE(tree) = TTYPE(tree) = tree->opval.val->type;
- return tree;
- }
- LRVAL(tree) = RRVAL(tree) = 1;
- if (IS_LITERAL(LTYPE(tree)) && !IS_LITERAL(RTYPE(tree))) {
- COPYTYPE(TTYPE(tree),TETYPE(tree),RTYPE(tree));
- } else {
- COPYTYPE(TTYPE(tree),TETYPE(tree),LTYPE(tree));
- }
- return tree ;
+ /* make smaller type only if it's a LEFT_OP */
+ if (tree->opval.op == LEFT_OP)
+ tree->left = addCast (tree->left, resultTypeProp, TRUE);
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* casting */
- /*----------------------------*/
- case CAST: /* change the type */
- /* cannot cast to an aggregate type */
- if (IS_AGGREGATE(LTYPE(tree))) {
- werror(E_CAST_ILLEGAL);
- goto errorTreeReturn ;
- }
+ /* if they are both literal then */
+ /* rewrite the tree */
+ if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val = valShift (valFromType (LETYPE (tree)),
+ valFromType (RETYPE (tree)),
+ (tree->opval.op == LEFT_OP ? 1 : 0));
+ tree->right = tree->left = NULL;
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ tree->opval.val->type);
+ return tree;
+ }
- /* if the right is a literal replace the tree */
- if (IS_LITERAL(RETYPE(tree)) && !IS_PTR(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val =
- valCastLiteral(LTYPE(tree),
- floatFromVal(valFromType(RETYPE(tree))));
- tree->left = NULL;
- tree->right = NULL;
- TTYPE(tree) = tree->opval.val->type;
- tree->values.literalFromCast = 1;
- }
- else {
- TTYPE(tree) = LTYPE(tree);
- LRVAL(tree) = 1;
- }
+ /* see if this is a GETBYTE operation if yes
+ then return that */
+ {
+ ast *otree = optimizeGetByte (tree, resultType);
- TETYPE(tree) = getSpec(TTYPE(tree));
+ if (otree != tree)
+ return decorateType (otree, RESULT_TYPE_NONE);
+ }
- return tree;
+ /* see if this is a GETWORD operation if yes
+ then return that */
+ {
+ ast *otree = optimizeGetWord (tree, resultType);
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* logical &&, || */
- /*----------------------------*/
- case AND_OP:
- case OR_OP:
- /* each must me arithmetic type or be a pointer */
- if (!IS_PTR(LTYPE(tree)) &&
- !IS_ARRAY(LTYPE(tree)) &&
- !IS_INTEGRAL(LTYPE(tree))) {
- werror(E_COMPARE_OP);
- goto errorTreeReturn ;
- }
+ if (otree != tree)
+ return decorateType (otree, RESULT_TYPE_NONE);
+ }
- if (!IS_PTR(RTYPE(tree)) &&
- !IS_ARRAY(RTYPE(tree)) &&
- !IS_INTEGRAL(RTYPE(tree))) {
- werror(E_COMPARE_OP);
- goto errorTreeReturn ;
- }
- /* if they are both literal then */
- /* rewrite the tree */
- if (IS_LITERAL(RTYPE(tree)) &&
- IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valLogicAndOr (valFromType(LETYPE(tree)),
- valFromType(RETYPE(tree)),
- tree->opval.op);
- tree->right = tree->left = NULL;
- TETYPE(tree) = getSpec(TTYPE(tree) =
- tree->opval.val->type);
- return tree ;
- }
- LRVAL(tree) = RRVAL(tree) = 1;
- TTYPE(tree) = TETYPE(tree) = newCharLink();
- return tree ;
+ LRVAL (tree) = RRVAL (tree) = 1;
+ if (tree->opval.op == LEFT_OP)
+ {
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ computeType (LTYPE (tree),
+ NULL,
+ resultType,
+ tree->opval.op));
+ }
+ else /* RIGHT_OP */
+ {
+ /* no promotion necessary */
+ TTYPE (tree) = TETYPE (tree) = copyLinkChain (LTYPE (tree));
+ if (IS_LITERAL (TTYPE (tree)))
+ SPEC_SCLS (TTYPE (tree)) &= ~S_LITERAL;
+ }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* comparison operators */
- /*----------------------------*/
- case '>' :
- case '<' :
- case LE_OP :
- case GE_OP :
- case EQ_OP :
- case NE_OP :
- {
- ast *lt = optimizeCompare(tree);
+ /* if only the right side is a literal & we are
+ shifting more than size of the left operand then zero */
+ if (IS_LITERAL (RTYPE (tree)) &&
+ ((TYPE_TARGET_ULONG) ulFromVal (valFromType (RETYPE (tree)))) >=
+ (getSize (TETYPE (tree)) * 8))
+ {
+ if (tree->opval.op==LEFT_OP ||
+ (tree->opval.op==RIGHT_OP && SPEC_USIGN(LETYPE(tree))))
+ {
+ werrorfl (tree->filename, tree->lineno, W_SHIFT_CHANGED,
+ (tree->opval.op == LEFT_OP ? "left" : "right"));
+ tree->type = EX_VALUE;
+ tree->left = tree->right = NULL;
+ tree->opval.val = constCharVal (0);
+ TETYPE (tree) = TTYPE (tree) = tree->opval.val->type;
+ return tree;
+ }
+ }
- if ( tree != lt )
- return lt;
- }
+ return tree;
- /* if they are pointers they must be castable */
- if ( IS_PTR(LTYPE(tree)) && IS_PTR(RTYPE(tree))) {
- if (checkType(LTYPE(tree),RTYPE(tree)) == 0) {
- werror(E_COMPARE_OP);
- fprintf(stderr,"comparing type ");
- printTypeChain(LTYPE(tree),stderr);
- fprintf(stderr,"to type ");
- printTypeChain(RTYPE(tree),stderr);
- fprintf(stderr,"\n");
- goto errorTreeReturn ;
- }
- }
- /* else they should be promotable to one another */
- else {
- if (!( ( IS_PTR(LTYPE(tree)) && IS_LITERAL(RTYPE(tree))) ||
- ( IS_PTR(RTYPE(tree)) && IS_LITERAL(LTYPE(tree)))))
-
- if (checkType (LTYPE(tree),RTYPE(tree)) == 0 ) {
- werror(E_COMPARE_OP);
- fprintf(stderr,"comparing type ");
- printTypeChain(LTYPE(tree),stderr);
- fprintf(stderr,"to type ");
- printTypeChain(RTYPE(tree),stderr);
- fprintf(stderr,"\n");
- goto errorTreeReturn ;
- }
- }
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* casting */
+ /*----------------------------*/
+ case CAST: /* change the type */
+ /* cannot cast to an aggregate type */
+ if (IS_AGGREGATE (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_CAST_ILLEGAL);
+ goto errorTreeReturn;
+ }
- /* if they are both literal then */
- /* rewrite the tree */
- if (IS_LITERAL(RTYPE(tree)) &&
- IS_LITERAL(LTYPE(tree))) {
- tree->type = EX_VALUE ;
- tree->opval.val = valCompare (valFromType(LETYPE(tree)),
- valFromType(RETYPE(tree)),
- tree->opval.op);
- tree->right = tree->left = NULL;
- TETYPE(tree) = getSpec(TTYPE(tree) =
- tree->opval.val->type);
- return tree ;
- }
- LRVAL(tree) = RRVAL(tree) = 1;
- TTYPE(tree) = TETYPE(tree) = newCharLink();
- return tree ;
+ /* make sure the type is complete and sane */
+ changePointer(LTYPE(tree));
+ checkTypeSanity(LETYPE(tree), "(cast)");
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* sizeof */
- /*----------------------------*/
- case SIZEOF : /* evaluate wihout code generation */
- /* change the type to a integer */
- tree->type = EX_VALUE;
- sprintf(buffer,"%d",(getSize(tree->right->ftype)));
- tree->opval.val = constVal(buffer);
- tree->right = tree->left = NULL;
- TETYPE(tree) = getSpec(TTYPE(tree) =
- tree->opval.val->type);
- return tree;
+ /* if 'from' and 'to' are the same remove the superfluous cast,
+ * this helps other optimizations */
+ if (compareTypeExact (LTYPE(tree), RTYPE(tree), -1) == 1)
+ {
+ /* mark that the explicit cast has been removed,
+ * for proper processing (no integer promotion) of explicitly typecasted variable arguments */
+ tree->right->values.removedCast = 1;
+ return tree->right;
+ }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* conditional operator '?' */
- /*----------------------------*/
- case '?' :
- /* the type is one on the left */
- TTYPE(tree) = LTYPE(tree);
- TETYPE(tree)= getSpec (TTYPE(tree));
- return tree ;
-
- case ':' :
- /* if they don't match we have a problem */
- if (checkType( LTYPE(tree), RTYPE(tree)) == 0) {
- werror(E_TYPE_MISMATCH,"conditional operator"," ");
- goto errorTreeReturn ;
- }
+ /* If code memory is read only, then pointers to code memory */
+ /* implicitly point to constants -- make this explicit */
+ {
+ sym_link *t = LTYPE(tree);
+ while (t && t->next)
+ {
+ if (IS_CODEPTR(t) && port->mem.code_ro)
+ {
+ if (IS_SPEC(t->next))
+ SPEC_CONST (t->next) = 1;
+ else
+ DCL_PTR_CONST (t->next) = 1;
+ }
+ t = t->next;
+ }
+ }
+
+#if 0
+ /* if the right is a literal replace the tree */
+ if (IS_LITERAL (RETYPE (tree)))
+ {
+ if (!IS_PTR (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val =
+ valCastLiteral (LTYPE (tree),
+ floatFromVal (valFromType (RETYPE (tree))));
+ tree->left = NULL;
+ tree->right = NULL;
+ TTYPE (tree) = tree->opval.val->type;
+ tree->values.literalFromCast = 1;
+ }
+ else if (IS_GENPTR(LTYPE(tree)) && !IS_PTR(RTYPE(tree)) &&
+ ((int) ulFromVal(valFromType(RETYPE(tree)))) !=0 ) /* special case of NULL */
+ {
+ sym_link *rest = LTYPE(tree)->next;
+ werrorfl (tree->filename, tree->lineno, W_LITERAL_GENERIC);
+ TTYPE(tree) = newLink(DECLARATOR);
+ DCL_TYPE(TTYPE(tree)) = FPOINTER;
+ TTYPE(tree)->next = rest;
+ tree->left->opval.lnk = TTYPE(tree);
+ LRVAL (tree) = 1;
+ }
+ else
+ {
+ TTYPE (tree) = LTYPE (tree);
+ LRVAL (tree) = 1;
+ }
+ }
+ else
+ {
+ TTYPE (tree) = LTYPE (tree);
+ LRVAL (tree) = 1;
+ }
+#else
+#if 0 // this is already checked, now this could be explicit
+ /* if pointer to struct then check names */
+ if (IS_PTR(LTYPE(tree)) && IS_STRUCT(LTYPE(tree)->next) &&
+ IS_PTR(RTYPE(tree)) && IS_STRUCT(RTYPE(tree)->next) &&
+ strcmp(SPEC_STRUCT(LETYPE(tree))->tag,SPEC_STRUCT(RETYPE(tree))->tag))
+ {
+ werrorfl (tree->filename, tree->lineno, W_CAST_STRUCT_PTR,SPEC_STRUCT(RETYPE(tree))->tag,
+ SPEC_STRUCT(LETYPE(tree))->tag);
+ }
+#endif
+ if (IS_ADDRESS_OF_OP(tree->right)
+ && IS_AST_SYM_VALUE (tree->right->left)
+ && SPEC_ABSA (AST_SYMBOL (tree->right->left)->etype))
+ {
+ symbol * sym = AST_SYMBOL (tree->right->left);
+ unsigned int gptype = 0;
+ unsigned int addr = SPEC_ADDR (sym->etype);
+
+ if (IS_GENPTR (LTYPE (tree)) && ((GPTRSIZE > FPTRSIZE) || TARGET_IS_PIC16) )
+ {
+ switch (SPEC_SCLS (sym->etype))
+ {
+ case S_CODE:
+ gptype = GPTYPE_CODE;
+ break;
+ case S_XDATA:
+ gptype = GPTYPE_FAR;
+ break;
+ case S_DATA:
+ case S_IDATA:
+ gptype = GPTYPE_NEAR;
+ break;
+ case S_PDATA:
+ gptype = GPTYPE_XSTACK;
+ break;
+ default:
+ gptype = 0;
+
+ if(TARGET_IS_PIC16 && (SPEC_SCLS(sym->etype) == S_FIXED))
+ gptype = GPTYPE_NEAR;
+ }
+ addr |= gptype << (8*(GPTRSIZE - 1));
+ }
+
+ tree->type = EX_VALUE;
+ tree->opval.val = valCastLiteral (LTYPE (tree), addr);
+ TTYPE (tree) = tree->opval.val->type;
+ TETYPE (tree) = getSpec (TTYPE (tree));
+ tree->left = NULL;
+ tree->right = NULL;
+ tree->values.literalFromCast = 1;
+ return tree;
+ }
- TTYPE(tree) = computeType(LTYPE(tree),RTYPE(tree));
- TETYPE(tree)= getSpec(TTYPE(tree));
- return tree ;
+ /* handle offsetof macro: */
+ /* #define offsetof(TYPE, MEMBER) \ */
+ /* ((unsigned) &((TYPE *)0)->MEMBER) */
+ if (IS_ADDRESS_OF_OP(tree->right)
+ && IS_AST_OP (tree->right->left)
+ && tree->right->left->opval.op == PTR_OP
+ && IS_AST_OP (tree->right->left->left)
+ && tree->right->left->left->opval.op == CAST
+ && IS_AST_LIT_VALUE(tree->right->left->left->right))
+ {
+ symbol *element = getStructElement (
+ SPEC_STRUCT (LETYPE(tree->right->left)),
+ AST_SYMBOL(tree->right->left->right)
+ );
+
+ if (element)
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val = valCastLiteral (
+ LTYPE (tree),
+ element->offset
+ + floatFromVal (valFromType (RTYPE (tree->right->left->left)))
+ );
+
+ TTYPE (tree) = tree->opval.val->type;
+ TETYPE (tree) = getSpec (TTYPE (tree));
+ tree->left = NULL;
+ tree->right = NULL;
+ return tree;
+ }
+ }
+ /* if the right is a literal replace the tree */
+ if (IS_LITERAL (RETYPE (tree)))
+ {
+ #if 0
+ if (IS_PTR (LTYPE (tree)) && !IS_GENPTR (LTYPE (tree)) )
+ {
+ /* rewrite (type *)litaddr
+ as &temp
+ and define type at litaddr temp
+ (but only if type's storage class is not generic)
+ */
+ ast *newTree = newNode ('&', NULL, NULL);
+ symbol *sym;
+
+ TTYPE (newTree) = LTYPE (tree);
+ TETYPE (newTree) = getSpec(LTYPE (tree));
+
+ /* define a global symbol at the casted address*/
+ sym = newSymbol(genSymName (0), 0);
+ sym->type = LTYPE (tree)->next;
+ if (!sym->type)
+ sym->type = newLink (V_VOID);
+ sym->etype = getSpec(sym->type);
+ SPEC_SCLS (sym->etype) = sclsFromPtr (LTYPE (tree));
+ sym->lineDef = tree->lineno;
+ sym->cdef = 1;
+ sym->isref = 1;
+ SPEC_STAT (sym->etype) = 1;
+ SPEC_ADDR(sym->etype) = floatFromVal (valFromType (RTYPE (tree)));
+ SPEC_ABSA(sym->etype) = 1;
+ addSym (SymbolTab, sym, sym->name, 0, 0, 0);
+ allocGlobal (sym);
+
+ newTree->left = newAst_VALUE(symbolVal(sym));
+ newTree->left->filename = tree->filename;
+ newTree->left->lineno = tree->lineno;
+ LTYPE (newTree) = sym->type;
+ LETYPE (newTree) = sym->etype;
+ LLVAL (newTree) = 1;
+ LRVAL (newTree) = 0;
+ TLVAL (newTree) = 1;
+ return newTree;
+ }
+ #endif
+ if (!IS_PTR (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val =
+ valCastLiteral (LTYPE (tree), floatFromVal (valFromType (RTYPE (tree))));
+ TTYPE (tree) = tree->opval.val->type;
+ tree->left = NULL;
+ tree->right = NULL;
+ tree->values.literalFromCast = 1;
+ TETYPE (tree) = getSpec (TTYPE (tree));
+ return tree;
+ }
+ }
+ if (IS_GENPTR (LTYPE (tree)) && IS_PTR (RTYPE (tree)) && !IS_GENPTR (RTYPE (tree)) && (resultType != RESULT_TYPE_GPTR))
+ {
+ DCL_TYPE (LTYPE (tree)) = DCL_TYPE (RTYPE (tree));
+ }
+ TTYPE (tree) = LTYPE (tree);
+ LRVAL (tree) = 1;
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* assignment operators */
- /*----------------------------*/
- case MUL_ASSIGN:
- case DIV_ASSIGN:
- /* for these it must be both must be integral */
- if (!IS_ARITHMETIC(LTYPE(tree)) ||
- !IS_ARITHMETIC(RTYPE(tree))) {
- werror (E_OPS_INTEGRAL);
- goto errorTreeReturn ;
- }
- RRVAL(tree) = 1;
- TETYPE(tree) = getSpec(TTYPE(tree) = LTYPE(tree));
+#endif
+ TETYPE (tree) = getSpec (TTYPE (tree));
- if (!tree->initMode && IS_CONSTANT(LETYPE(tree)))
- werror(E_CODE_WRITE," ");
+ return tree;
- if (LRVAL(tree)) {
- werror(E_LVALUE_REQUIRED,"*= or /=");
- goto errorTreeReturn ;
- }
- LLVAL(tree) = 1;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* logical &&, || */
+ /*----------------------------*/
+ case AND_OP:
+ case OR_OP:
+ /* each must be arithmetic type or be a pointer */
+ if (!IS_PTR (LTYPE (tree)) &&
+ !IS_ARRAY (LTYPE (tree)) &&
+ !IS_INTEGRAL (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_COMPARE_OP);
+ goto errorTreeReturn;
+ }
- propAsgType(tree);
+ if (!IS_PTR (RTYPE (tree)) &&
+ !IS_ARRAY (RTYPE (tree)) &&
+ !IS_INTEGRAL (RTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_COMPARE_OP);
+ goto errorTreeReturn;
+ }
+ /* if they are both literal then */
+ /* rewrite the tree */
+ if (IS_LITERAL (RTYPE (tree)) &&
+ IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val = valLogicAndOr (valFromType (LTYPE (tree)),
+ valFromType (RTYPE (tree)),
+ tree->opval.op);
+ tree->right = tree->left = NULL;
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ tree->opval.val->type);
+ return tree;
+ }
+ LRVAL (tree) = RRVAL (tree) = 1;
+ TTYPE (tree) = TETYPE (tree) = (resultTypeProp == RESULT_TYPE_BIT) ? newBoolLink() :newCharLink();
+ return tree;
- return tree ;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* comparison operators */
+ /*----------------------------*/
+ case '>':
+ case '<':
+ case LE_OP:
+ case GE_OP:
+ case EQ_OP:
+ case NE_OP:
+ {
+ ast *lt = optimizeCompare (tree);
- case AND_ASSIGN:
- case OR_ASSIGN:
- case XOR_ASSIGN:
- case RIGHT_ASSIGN:
- case LEFT_ASSIGN:
- /* for these it must be both must be integral */
- if (!IS_INTEGRAL(LTYPE(tree)) ||
- !IS_INTEGRAL(RTYPE(tree))) {
- werror (E_OPS_INTEGRAL);
- goto errorTreeReturn ;
- }
- RRVAL(tree) = 1;
- TETYPE(tree) = getSpec(TTYPE(tree) = LTYPE(tree));
+ if (tree != lt)
+ return lt;
+ }
- if (!tree->initMode && IS_CONSTANT(LETYPE(tree)))
- werror(E_CODE_WRITE," ");
+ /* if they are pointers they must be castable */
+ if (IS_PTR (LTYPE (tree)) && IS_PTR (RTYPE (tree)))
+ {
+ if (tree->opval.op==EQ_OP &&
+ !IS_GENPTR(LTYPE(tree)) && IS_GENPTR(RTYPE(tree))) {
+ // we cannot cast a gptr to a !gptr: switch the leaves
+ struct ast *s=tree->left;
+ tree->left=tree->right;
+ tree->right=s;
+ }
+ if (compareType (LTYPE (tree), RTYPE (tree)) == 0)
+ {
+ werrorfl (tree->filename, tree->lineno, E_COMPARE_OP);
+ fprintf (stderr, "comparing type ");
+ printTypeChain (LTYPE (tree), stderr);
+ fprintf (stderr, "to type ");
+ printTypeChain (RTYPE (tree), stderr);
+ fprintf (stderr, "\n");
+ goto errorTreeReturn;
+ }
+ }
+ /* else they should be promotable to one another */
+ else
+ {
+ if (!((IS_PTR (LTYPE (tree)) && IS_LITERAL (RTYPE (tree))) ||
+ (IS_PTR (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))))
+
+ if (compareType (LTYPE (tree), RTYPE (tree)) == 0)
+ {
+ werrorfl (tree->filename, tree->lineno, E_COMPARE_OP);
+ fprintf (stderr, "comparing type ");
+ printTypeChain (LTYPE (tree), stderr);
+ fprintf (stderr, "to type ");
+ printTypeChain (RTYPE (tree), stderr);
+ fprintf (stderr, "\n");
+ goto errorTreeReturn;
+ }
+ }
- if (LRVAL(tree)) {
- werror(E_LVALUE_REQUIRED,"&= or |= or ^= or >>= or <<=");
- goto errorTreeReturn ;
- }
- LLVAL(tree) = 1;
+ {
+ CCR_RESULT ccr_result = CCR_OK;
+
+ /* if left is integral and right is literal
+ then check constant range */
+ if (IS_INTEGRAL(LTYPE(tree)) && IS_LITERAL(RTYPE(tree)))
+ ccr_result = checkConstantRange (LTYPE (tree), RTYPE (tree),
+ tree->opval.op, FALSE);
+ if (ccr_result == CCR_OK &&
+ IS_INTEGRAL(RTYPE(tree)) && IS_LITERAL(LTYPE(tree)))
+ ccr_result = checkConstantRange (RTYPE (tree), LTYPE (tree),
+ tree->opval.op, TRUE);
+ switch (ccr_result)
+ {
+ case CCR_ALWAYS_TRUE:
+ case CCR_ALWAYS_FALSE:
+ if (!options.lessPedantic)
+ werrorfl (tree->filename, tree->lineno, W_COMP_RANGE,
+ ccr_result == CCR_ALWAYS_TRUE ? "true" : "false");
+ return decorateType (newAst_VALUE (constCharVal ((unsigned char)(ccr_result == CCR_ALWAYS_TRUE))), resultType);
+ case CCR_OK:
+ default:
+ break;
+ }
+ }
- propAsgType(tree);
+ /* if (unsigned value) > 0 then '(unsigned value) ? 1 : 0' */
+ if (tree->opval.op == '>' &&
+ SPEC_USIGN(LETYPE(tree)) &&
+ IS_LITERAL(RTYPE(tree)) &&
+ ((int) ulFromVal (valFromType (RETYPE (tree)))) == 0)
+ {
+ if ((resultType == RESULT_TYPE_IFX) || (resultType == RESULT_TYPE_BIT))
+ {
+ /* the parent is an ifx: */
+ /* if (unsigned value) */
+ return tree->left;
+ }
+
+ /* (unsigned value) ? 1 : 0 */
+ tree->opval.op = '?';
+ tree->right = newNode (':',
+ newAst_VALUE (constCharVal (1)),
+ tree->right); /* val 0 */
+ tree->right->filename = tree->filename;
+ tree->right->lineno = tree->lineno;
+ tree->right->left->filename = tree->filename;
+ tree->right->left->lineno = tree->lineno;
+ tree->decorated = 0;
+ return decorateType (tree, resultType);
+ }
- return tree ;
+ /* 'ifx (op == 0)' -> 'ifx (!(op))' */
+ if (IS_LITERAL(RTYPE(tree)) &&
+ floatFromVal (valFromType (RETYPE (tree))) == 0 &&
+ tree->opval.op == EQ_OP &&
+ (resultType == RESULT_TYPE_IFX || resultType == RESULT_TYPE_BIT))
+ {
+ tree->opval.op = '!';
+ tree->right = NULL;
+ tree->decorated = 0;
+ return decorateType (tree, resultType);
+ }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* -= operator */
- /*----------------------------*/
- case SUB_ASSIGN:
- if (!(IS_PTR(LTYPE(tree)) ||
- IS_ARITHMETIC(LTYPE(tree)))) {
- werror(E_PLUS_INVALID,"-=");
- goto errorTreeReturn ;
- }
+ /* if they are both literal then */
+ /* rewrite the tree */
+ if (IS_LITERAL (RTYPE (tree)) &&
+ IS_LITERAL (LTYPE (tree)))
+ {
+ tree->type = EX_VALUE;
+ tree->opval.val = valCompare (valFromType (LETYPE (tree)),
+ valFromType (RETYPE (tree)),
+ tree->opval.op);
+ tree->right = tree->left = NULL;
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ tree->opval.val->type);
+ return tree;
+ }
- if (!(IS_PTR(RTYPE(tree)) ||
- IS_ARITHMETIC(RTYPE(tree)))) {
- werror(E_PLUS_INVALID,"-=");
- goto errorTreeReturn ;
- }
- RRVAL(tree) = 1;
- TETYPE(tree) = getSpec (TTYPE(tree) =
- computeType(LTYPE(tree),
- RTYPE(tree)));
+ /* if one is 'signed char ' and the other one is 'unsigned char' */
+ /* it's necessary to promote to int */
+ if (IS_CHAR (RTYPE (tree)) && IS_CHAR (LTYPE (tree)) &&
+ (IS_UNSIGNED (RTYPE (tree)) != IS_UNSIGNED (LTYPE (tree))))
+ {
+ /* Literals are 'optimized' to 'unsigned char'. Try to figure out,
+ if it's possible to use a 'signed char' */
+
+ /* is left a 'unsigned char'? */
+ if (IS_LITERAL (RTYPE (tree)) && IS_UNSIGNED (RTYPE (tree)) &&
+ /* the value range of a 'unsigned char' is 0...255;
+ if the actual value is < 128 it can be changed to signed */
+ (int) ulFromVal (valFromType (RETYPE (tree))) < 128)
+ {
+ /* now we've got 2 'signed char'! */
+ SPEC_USIGN (RETYPE (tree)) = 0;
+ }
+ /* same test for the left operand: */
+ else if (IS_LITERAL (LTYPE (tree)) && IS_UNSIGNED (LTYPE (tree)) &&
+ (int) ulFromVal (valFromType (LETYPE (tree))) < 128)
+ {
+ SPEC_USIGN (LETYPE (tree)) = 0;
+ }
+ else
+ {
+ werrorfl (tree->filename, tree->lineno, W_CMP_SU_CHAR);
+ tree->left = addCast (tree->left , RESULT_TYPE_INT, TRUE);
+ tree->right = addCast (tree->right, RESULT_TYPE_INT, TRUE);
+ }
+ }
- if (!tree->initMode && IS_CONSTANT(LETYPE(tree)))
- werror(E_CODE_WRITE," ");
+ LRVAL (tree) = RRVAL (tree) = 1;
+ TTYPE (tree) = TETYPE (tree) = (resultType == RESULT_TYPE_BIT) ? newBoolLink() :newCharLink();
- if (LRVAL(tree)) {
- werror(E_LVALUE_REQUIRED,"-=");
- goto errorTreeReturn ;
- }
- LLVAL(tree) = 1;
+ /* condition transformations */
+ {
+ unsigned transformedOp = 0;
+
+ switch (tree->opval.op)
+ {
+ case '<': /* transform (a < b) to !(a >= b) */
+ if (port->lt_nge)
+ transformedOp = GE_OP;
+ break;
+ case '>': /* transform (a > b) to !(a <= b) */
+ if (port->gt_nle)
+ transformedOp = LE_OP;
+ break;
+ case LE_OP: /* transform (a <= b) to !(a > b) */
+ if (port->le_ngt)
+ transformedOp = '>';
+ break;
+ case GE_OP: /* transform (a >= b) to !(a < b) */
+ if (port->ge_nlt)
+ transformedOp = '<';
+ break;
+ case NE_OP: /* transform (a != b) to !(a == b) */
+ if (port->ne_neq)
+ transformedOp = EQ_OP;
+ break;
+ case EQ_OP: /* transform (a == b) to !(a != b) */
+ if (port->eq_nne)
+ transformedOp = NE_OP;
+ break;
+ default:
+ break;
+ }
+ if (transformedOp)
+ {
+ tree->opval.op = transformedOp;
+ tree->decorated = 0;
+ tree = newNode ('!', tree, NULL);
+ tree->filename = tree->left->filename;
+ tree->lineno = tree->left->lineno;
+ return decorateType (tree, resultType);
+ }
+ }
- propAsgType(tree);
+ return tree;
- return tree;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* sizeof */
+ /*----------------------------*/
+ case SIZEOF: /* evaluate wihout code generation */
+ /* change the type to a integer */
+ {
+ int size = getSize (tree->right->ftype);
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* += operator */
- /*----------------------------*/
- case ADD_ASSIGN:
- /* this is not a unary operation */
- /* if both pointers then problem */
- if (IS_PTR(LTYPE(tree)) && IS_PTR(RTYPE(tree)) ) {
- werror(E_PTR_PLUS_PTR);
- goto errorTreeReturn ;
- }
+ SNPRINTF(buffer, sizeof(buffer), "%d", size);
+ if (!size && !IS_VOID(tree->right->ftype))
+ werrorfl (tree->filename, tree->lineno, E_SIZEOF_INCOMPLETE_TYPE);
+ }
+ tree->type = EX_VALUE;
+ tree->opval.val = constVal (buffer);
+ tree->right = tree->left = NULL;
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ tree->opval.val->type);
- if (!IS_ARITHMETIC(LTYPE(tree)) && !IS_PTR(LTYPE(tree))) {
- werror(E_PLUS_INVALID,"+=");
- goto errorTreeReturn ;
- }
+ return tree;
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* typeof */
+ /*----------------------------*/
+ case TYPEOF:
+ /* return typeof enum value */
+ tree->type = EX_VALUE;
+ {
+ int typeofv = 0;
+ if (IS_SPEC(tree->right->ftype)) {
+ switch (SPEC_NOUN(tree->right->ftype)) {
+ case V_INT:
+ if (SPEC_LONG(tree->right->ftype)) typeofv = TYPEOF_LONG;
+ else typeofv = TYPEOF_INT;
+ break;
+ case V_FLOAT:
+ typeofv = TYPEOF_FLOAT;
+ break;
+ case V_FIXED16X16:
+ typeofv = TYPEOF_FIXED16X16;
+ break;
+ case V_CHAR:
+ typeofv = TYPEOF_CHAR;
+ break;
+ case V_VOID:
+ typeofv = TYPEOF_VOID;
+ break;
+ case V_STRUCT:
+ typeofv = TYPEOF_STRUCT;
+ break;
+ case V_BITFIELD:
+ typeofv = TYPEOF_BITFIELD;
+ break;
+ case V_BIT:
+ typeofv = TYPEOF_BIT;
+ break;
+ case V_SBIT:
+ typeofv = TYPEOF_SBIT;
+ break;
+ default:
+ break;
+ }
+ } else {
+ switch (DCL_TYPE(tree->right->ftype)) {
+ case POINTER:
+ typeofv = TYPEOF_POINTER;
+ break;
+ case FPOINTER:
+ typeofv = TYPEOF_FPOINTER;
+ break;
+ case CPOINTER:
+ typeofv = TYPEOF_CPOINTER;
+ break;
+ case GPOINTER:
+ typeofv = TYPEOF_GPOINTER;
+ break;
+ case PPOINTER:
+ typeofv = TYPEOF_PPOINTER;
+ break;
+ case IPOINTER:
+ typeofv = TYPEOF_IPOINTER;
+ break;
+ case ARRAY:
+ typeofv = TYPEOF_ARRAY;
+ break;
+ case FUNCTION:
+ typeofv = TYPEOF_FUNCTION;
+ break;
+ default:
+ break;
+ }
+ }
+ SNPRINTF (buffer, sizeof(buffer), "%d", typeofv);
+ tree->opval.val = constVal (buffer);
+ tree->right = tree->left = NULL;
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ tree->opval.val->type);
+ }
+ return tree;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* conditional operator '?' */
+ /*----------------------------*/
+ case '?':
+ /* the type is value of the colon operator (on the right) */
+ assert (IS_COLON_OP (tree->right));
+
+ /* If already known then replace the tree : optimizer will do it
+ but faster to do it here. If done before decorating tree->right
+ this can save generating unused const strings. */
+ if (IS_LITERAL (LTYPE (tree)))
+ {
+ if (((int) ulFromVal (valFromType (LETYPE (tree)))) != 0)
+ return decorateType (tree->right->left, resultTypeProp);
+ else
+ return decorateType (tree->right->right, resultTypeProp);
+ }
+
+ tree->right = decorateType (tree->right, resultTypeProp);
+
+ if (IS_AST_LIT_VALUE (tree->right->left) && IS_AST_LIT_VALUE (tree->right->right) &&
+ ((resultType == RESULT_TYPE_IFX) || (resultType == RESULT_TYPE_BIT)))
+ {
+ double valTrue = AST_FLOAT_VALUE (tree->right->left);
+ double valFalse = AST_FLOAT_VALUE (tree->right->right);
+
+ if ((valTrue != 0) && (valFalse == 0))
+ {
+ /* assign cond to result */
+ tree->left->decorated = 0;
+ return decorateType (tree->left, resultTypeProp);
+ }
+ else if ((valTrue == 0) && (valFalse != 0))
+ {
+ /* assign !cond to result */
+ tree->opval.op = '!';
+ tree->decorated = 0;
+ tree->right = NULL;
+ return decorateType (tree, resultTypeProp);
+ }
+ else
+ {
+ /* they have the same boolean value, make them equal */
+ tree->right->left = tree->right->right;
+ }
+ }
+
+ /* if they are equal then replace the tree */
+ if (isAstEqual (tree->right->left, tree->right->right))
+ {
+ return tree->right->left;
+ }
+
+ TTYPE (tree) = RTYPE (tree);
+ TETYPE (tree) = getSpec (TTYPE (tree));
+ return tree;
+
+ case ':':
+ /* if they don't match we have a problem */
+ if ((compareType (LTYPE (tree), RTYPE (tree)) == 0) &&
+ (compareType (RTYPE (tree), LTYPE (tree)) == 0))
+ {
+ werrorfl (tree->filename, tree->lineno, E_TYPE_MISMATCH, "conditional operator", " ");
+ goto errorTreeReturn;
+ }
+
+ TTYPE (tree) = computeType (LTYPE (tree), RTYPE (tree),
+ resultType, tree->opval.op);
+ TETYPE (tree) = getSpec (TTYPE (tree));
+ return tree;
+
+
+#if 0 // assignment operators are converted by the parser
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* assignment operators */
+ /*----------------------------*/
+ case MUL_ASSIGN:
+ case DIV_ASSIGN:
+ /* for these it must be both must be integral */
+ if (!IS_ARITHMETIC (LTYPE (tree)) ||
+ !IS_ARITHMETIC (RTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_OPS_INTEGRAL);
+ goto errorTreeReturn;
+ }
+ RRVAL (tree) = 1;
+ TETYPE (tree) = getSpec (TTYPE (tree) = LTYPE (tree));
+
+ if (!tree->initMode && IS_CONSTANT (LTYPE (tree)))
+ werrorfl (tree->filename, tree->lineno, E_CODE_WRITE, tree->opval.op==MUL_ASSIGN ? "*=" : "/=");
+
+ if (LRVAL (tree))
+ {
+ werrorfl (tree->filename, tree->lineno, E_LVALUE_REQUIRED, tree->opval.op==MUL_ASSIGN ? "*=" : "/=");
+ goto errorTreeReturn;
+ }
+ LLVAL (tree) = 1;
+
+ return tree;
+
+ case AND_ASSIGN:
+ case OR_ASSIGN:
+ case XOR_ASSIGN:
+ case RIGHT_ASSIGN:
+ case LEFT_ASSIGN:
+ /* for these it must be both must be integral */
+ if (!IS_INTEGRAL (LTYPE (tree)) ||
+ !IS_INTEGRAL (RTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_OPS_INTEGRAL);
+ goto errorTreeReturn;
+ }
+ RRVAL (tree) = 1;
+ TETYPE (tree) = getSpec (TTYPE (tree) = LTYPE (tree));
+
+ if (!tree->initMode && IS_CONSTANT (LETYPE (tree)))
+ werrorfl (tree->filename, tree->lineno, E_CODE_WRITE, "&= or |= or ^= or >>= or <<=");
+
+ if (LRVAL (tree))
+ {
+ werrorfl (tree->filename, tree->lineno, E_LVALUE_REQUIRED, "&= or |= or ^= or >>= or <<=");
+ goto errorTreeReturn;
+ }
+ LLVAL (tree) = 1;
+
+ return tree;
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* -= operator */
+ /*----------------------------*/
+ case SUB_ASSIGN:
+ if (!(IS_PTR (LTYPE (tree)) ||
+ IS_ARITHMETIC (LTYPE (tree))))
+ {
+ werrorfl (tree->filename, tree->lineno, E_PLUS_INVALID, "-=");
+ goto errorTreeReturn;
+ }
+
+ if (!(IS_PTR (RTYPE (tree)) ||
+ IS_ARITHMETIC (RTYPE (tree))))
+ {
+ werrorfl (tree->filename, tree->lineno, E_PLUS_INVALID, "-=");
+ goto errorTreeReturn;
+ }
+ RRVAL (tree) = 1;
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ computeType (LTYPE (tree),
+ RTYPE (tree),
+ RESULT_TYPE_NOPROM,
+ tree->opval.op));
+
+ if (!tree->initMode && IS_CONSTANT (LETYPE (tree)))
+ werrorfl (tree->filename, tree->lineno, E_CODE_WRITE, "-=");
+
+ if (LRVAL (tree))
+ {
+ werrorfl (tree->filename, tree->lineno, E_LVALUE_REQUIRED, "-=");
+ goto errorTreeReturn;
+ }
+ LLVAL (tree) = 1;
+
+ return tree;
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* += operator */
+ /*----------------------------*/
+ case ADD_ASSIGN:
+ /* this is not a unary operation */
+ /* if both pointers then problem */
+ if (IS_PTR (LTYPE (tree)) && IS_PTR (RTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_PTR_PLUS_PTR);
+ goto errorTreeReturn;
+ }
+
+ if (!IS_ARITHMETIC (LTYPE (tree)) && !IS_PTR (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_PLUS_INVALID, "+=");
+ goto errorTreeReturn;
+ }
+
+ if (!IS_ARITHMETIC (RTYPE (tree)) && !IS_PTR (RTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_PLUS_INVALID, "+=");
+ goto errorTreeReturn;
+ }
+ RRVAL (tree) = 1;
+ TETYPE (tree) = getSpec (TTYPE (tree) =
+ computeType (LTYPE (tree),
+ RTYPE (tree),
+ RESULT_TYPE_NOPROM,
+ tree->opval.op));
+
+ if (!tree->initMode && IS_CONSTANT (LETYPE (tree)))
+ werrorfl (tree->filename, tree->lineno, E_CODE_WRITE, "+=");
+
+ if (LRVAL (tree))
+ {
+ werrorfl (tree->filename, tree->lineno, E_LVALUE_REQUIRED, "+=");
+ goto errorTreeReturn;
+ }
+
+ tree->right = decorateType (newNode ('+', copyAst (tree->left), tree->right), RESULT_TYPE_NONE);
+ tree->opval.op = '=';
+
+ return tree;
+#endif
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* straight assignemnt */
+ /*----------------------------*/
+ case '=':
+ /* cannot be an aggregate */
+ if (IS_AGGREGATE (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_AGGR_ASSIGN);
+ goto errorTreeReturn;
+ }
+
+ /* they should either match or be castable */
+ if (compareType (LTYPE (tree), RTYPE (tree)) == 0)
+ {
+ werrorfl (tree->filename, tree->lineno, E_TYPE_MISMATCH, "assignment", " ");
+ printFromToType(RTYPE(tree),LTYPE(tree));
+ }
+
+ /* if the left side of the tree is of type void
+ then report error */
+ if (IS_VOID (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_CAST_ZERO);
+ printFromToType(RTYPE(tree), LTYPE(tree));
+ }
+
+ TETYPE (tree) = getSpec (TTYPE (tree) = LTYPE (tree));
+ RRVAL (tree) = 1;
+ LLVAL (tree) = 1;
+ if (!tree->initMode ) {
+ if (IS_CONSTANT(LTYPE(tree)))
+ werrorfl (tree->filename, tree->lineno, E_CODE_WRITE, "=");
+ }
+ if (LRVAL (tree))
+ {
+ werrorfl (tree->filename, tree->lineno, E_LVALUE_REQUIRED, "=");
+ goto errorTreeReturn;
+ }
+
+ return tree;
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* comma operator */
+ /*----------------------------*/
+ case ',':
+ TETYPE (tree) = getSpec (TTYPE (tree) = RTYPE (tree));
+ return tree;
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* function call */
+ /*----------------------------*/
+ case CALL:
+
+ /* undo any explicit pointer derefernce; PCALL will handle it instead */
+ if (IS_FUNC (LTYPE (tree)) && tree->left->type == EX_OP)
+ {
+ if (tree->left->opval.op == '*' && !tree->left->right)
+ tree->left = tree->left->left;
+ }
+
+ /* require a function or pointer to function */
+ if (!IS_FUNC (LTYPE (tree)) && !IS_FUNCPTR (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_FUNCTION_EXPECTED);
+ goto errorTreeReturn;
+ }
+
+ /* if there are parms, make sure that
+ parms are decorate / process / reverse only once */
+ if (!tree->right ||
+ !tree->right->decorated)
+ {
+ sym_link *functype;
+ parmNumber = 1;
+
+ if (IS_FUNCPTR (LTYPE (tree)))
+ {
+ functype = LTYPE (tree)->next;
+ processFuncPtrArgs (functype);
+ }
+ else
+ functype = LTYPE (tree);
+
+ if (processParms (tree->left, FUNC_ARGS(functype),
+ &tree->right, &parmNumber, TRUE))
+ {
+ goto errorTreeReturn;
+ }
+
+ if ((options.stackAuto || IFFUNC_ISREENT (functype)) &&
+ !IFFUNC_ISBUILTIN(functype))
+ {
+ reverseParms (tree->right);
+ }
+
+ TTYPE (tree) = functype->next;
+ TETYPE (tree) = getSpec (TTYPE (tree));
+ }
+ return tree;
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* return statement */
+ /*----------------------------*/
+ case RETURN:
+ if (!tree->right)
+ goto voidcheck;
+
+ if (compareType (currFunc->type->next, RTYPE (tree)) == 0)
+ {
+ werrorfl (tree->filename, tree->lineno, W_RETURN_MISMATCH);
+ printFromToType (RTYPE(tree), currFunc->type->next);
+ goto errorTreeReturn;
+ }
+
+ if (IS_VOID (currFunc->type->next)
+ && tree->right &&
+ !IS_VOID (RTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_FUNC_VOID);
+ goto errorTreeReturn;
+ }
+
+ /* if there is going to be a casting required then add it */
+ if (compareType (currFunc->type->next, RTYPE (tree)) < 0)
+ {
+ tree->right =
+ decorateType (newNode (CAST,
+ newAst_LINK (copyLinkChain (currFunc->type->next)),
+ tree->right),
+ IS_GENPTR (currFunc->type->next) ? RESULT_TYPE_GPTR : RESULT_TYPE_NONE);
+ }
+
+ RRVAL (tree) = 1;
+ return tree;
+
+ voidcheck:
+
+ if (!IS_VOID (currFunc->type->next) && tree->right == NULL)
+ {
+ werrorfl (tree->filename, tree->lineno, W_VOID_FUNC, currFunc->name);
+ goto errorTreeReturn;
+ }
+
+ TTYPE (tree) = TETYPE (tree) = NULL;
+ return tree;
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* switch statement */
+ /*----------------------------*/
+ case SWITCH:
+ /* the switch value must be an integer */
+ if (!IS_INTEGRAL (LTYPE (tree)))
+ {
+ werrorfl (tree->filename, tree->lineno, E_SWITCH_NON_INTEGER);
+ goto errorTreeReturn;
+ }
+ LRVAL (tree) = 1;
+ TTYPE (tree) = TETYPE (tree) = NULL;
+ return tree;
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* ifx Statement */
+ /*----------------------------*/
+ case IFX:
+ tree->left = backPatchLabels (tree->left,
+ tree->trueLabel,
+ tree->falseLabel);
+ TTYPE (tree) = TETYPE (tree) = NULL;
+ return tree;
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* for Statement */
+ /*----------------------------*/
+ case FOR:
+
+ AST_FOR (tree, initExpr) = decorateType (
+ resolveSymbols (AST_FOR (tree, initExpr)), RESULT_TYPE_NONE);
+ AST_FOR (tree, condExpr) = decorateType (
+ resolveSymbols (AST_FOR (tree, condExpr)), RESULT_TYPE_NONE);
+ AST_FOR (tree, loopExpr) = decorateType (
+ resolveSymbols (AST_FOR (tree, loopExpr)), RESULT_TYPE_NONE);
+
+ /* if the for loop is reversible then
+ reverse it otherwise do what we normally
+ do */
+ {
+ symbol *sym;
+ ast *init, *end;
+
+ if (isLoopReversible (tree, &sym, &init, &end))
+ return reverseLoop (tree, sym, init, end);
+ else
+ return decorateType (createFor (AST_FOR (tree, trueLabel),
+ AST_FOR (tree, continueLabel),
+ AST_FOR (tree, falseLabel),
+ AST_FOR (tree, condLabel),
+ AST_FOR (tree, initExpr),
+ AST_FOR (tree, condExpr),
+ AST_FOR (tree, loopExpr),
+ tree->left), RESULT_TYPE_NONE);
+ }
+ case PARAM:
+ werrorfl (tree->filename, tree->lineno, E_INTERNAL_ERROR, __FILE__, __LINE__,
+ "node PARAM shouldn't be processed here");
+ /* but in processParams() */
+ return tree;
+ default:
+ TTYPE (tree) = TETYPE (tree) = NULL;
+ return tree;
+ }
+
+ /* some error found this tree will be killed */
+errorTreeReturn:
+ TTYPE (tree) = TETYPE (tree) = newCharLink ();
+ tree->opval.op = NULLOP;
+ tree->isError = 1;
+
+ return tree;
+}
+
+/*-----------------------------------------------------------------*/
+/* sizeofOp - processes size of operation */
+/*-----------------------------------------------------------------*/
+value *
+sizeofOp (sym_link * type)
+{
+ char buff[10];
+ int size;
+
+ /* make sure the type is complete and sane */
+ checkTypeSanity(type, "(sizeof)");
+
+ /* get the size and convert it to character */
+ SNPRINTF (buff, sizeof(buff), "%d", size = getSize (type));
+ if (!size && !IS_VOID(type))
+ werror (E_SIZEOF_INCOMPLETE_TYPE);
+
+ /* now convert into value */
+ return constVal (buff);
+}
+
+
+#define IS_AND(ex) (ex->type == EX_OP && ex->opval.op == AND_OP )
+#define IS_OR(ex) (ex->type == EX_OP && ex->opval.op == OR_OP )
+#define IS_NOT(ex) (ex->type == EX_OP && ex->opval.op == '!' )
+#define IS_ANDORNOT(ex) (IS_AND(ex) || IS_OR(ex) || IS_NOT(ex))
+#define IS_IFX(ex) (ex->type == EX_OP && ex->opval.op == IFX )
+#define IS_LT(ex) (ex->type == EX_OP && ex->opval.op == '<' )
+#define IS_GT(ex) (ex->type == EX_OP && ex->opval.op == '>')
+
+/*-----------------------------------------------------------------*/
+/* backPatchLabels - change and or not operators to flow control */
+/*-----------------------------------------------------------------*/
+static ast *
+backPatchLabels (ast * tree, symbol * trueLabel, symbol * falseLabel)
+{
+
+ if (!tree)
+ return NULL;
+
+ /* while-loops insert a label between the IFX and the condition,
+ therefore look behind the label too */
+ if (tree->opval.op == LABEL &&
+ tree->right &&
+ IS_ANDORNOT (tree->right))
+ {
+ tree->right = backPatchLabels (tree->right, trueLabel, falseLabel);
+ return tree;
+ }
+
+ if (!(IS_ANDORNOT (tree)))
+ return tree;
+
+ /* if this an and */
+ if (IS_AND (tree))
+ {
+ static int localLbl = 0;
+ symbol *localLabel;
+
+ SNPRINTF(buffer, sizeof(buffer), "_andif_%d", localLbl++);
+ localLabel = newSymbol (buffer, NestLevel);
+
+ tree->left = backPatchLabels (tree->left, localLabel, falseLabel);
+
+ /* if left is already a IFX then just change the if true label in that */
+ if (!IS_IFX (tree->left))
+ tree->left = newIfxNode (tree->left, localLabel, falseLabel);
+
+ tree->right = backPatchLabels (tree->right, trueLabel, falseLabel);
+ /* right is a IFX then just join */
+ if (IS_IFX (tree->right))
+ return newNode (NULLOP, tree->left, createLabel (localLabel, tree->right));
+
+ tree->right = createLabel (localLabel, tree->right);
+ tree->right = newIfxNode (tree->right, trueLabel, falseLabel);
+
+ return newNode (NULLOP, tree->left, tree->right);
+ }
+
+ /* if this is an or operation */
+ if (IS_OR (tree))
+ {
+ static int localLbl = 0;
+ symbol *localLabel;
+
+ SNPRINTF(buffer, sizeof(buffer), "_orif_%d", localLbl++);
+ localLabel = newSymbol (buffer, NestLevel);
+
+ tree->left = backPatchLabels (tree->left, trueLabel, localLabel);
+
+ /* if left is already a IFX then just change the if true label in that */
+ if (!IS_IFX (tree->left))
+ tree->left = newIfxNode (tree->left, trueLabel, localLabel);
+
+ tree->right = backPatchLabels (tree->right, trueLabel, falseLabel);
+ /* right is a IFX then just join */
+ if (IS_IFX (tree->right))
+ return newNode (NULLOP, tree->left, createLabel (localLabel, tree->right));
+
+ tree->right = createLabel (localLabel, tree->right);
+ tree->right = newIfxNode (tree->right, trueLabel, falseLabel);
+
+ return newNode (NULLOP, tree->left, tree->right);
+ }
+
+ /* change not */
+ if (IS_NOT (tree))
+ {
+ /* call with exchanged labels */
+ tree->left = backPatchLabels (tree->left, falseLabel, trueLabel);
+
+ /* if left isn't already a IFX */
+ if (!IS_IFX (tree->left))
+ {
+ tree->left = newNode (IFX, tree->left, NULL);
+ tree->left->trueLabel = falseLabel;
+ tree->left->falseLabel = trueLabel;
+ }
+ return tree->left;
+ }
+
+ if (IS_IFX (tree))
+ {
+ tree->trueLabel = trueLabel;
+ tree->falseLabel = falseLabel;
+ }
+
+ return tree;
+}
+
+
+/*-----------------------------------------------------------------*/
+/* createBlock - create expression tree for block */
+/*-----------------------------------------------------------------*/
+ast *
+createBlock (symbol * decl, ast * body)
+{
+ ast *ex;
+
+ /* if the block has nothing */
+ if (!body && !decl)
+ return NULL;
+
+ ex = newNode (BLOCK, NULL, body);
+ ex->values.sym = decl;
+
+ ex->level++;
+ ex->filename = NULL;
+ ex->lineno = 0;
+ return ex;
+}
+
+/*-----------------------------------------------------------------*/
+/* createLabel - creates the expression tree for labels */
+/*-----------------------------------------------------------------*/
+ast *
+createLabel (symbol * label, ast * stmnt)
+{
+ symbol *csym;
+ char name[SDCC_NAME_MAX + 1];
+ ast *rValue;
+
+ /* must create fresh symbol if the symbol name */
+ /* exists in the symbol table, since there can */
+ /* be a variable with the same name as the labl */
+ if ((csym = findSym (SymbolTab, NULL, label->name)) &&
+ (csym->level == label->level))
+ label = newSymbol (label->name, label->level);
+
+ /* change the name before putting it in add _ */
+ SNPRINTF(name, sizeof(name), "%s", label->name);
+
+ /* put the label in the LabelSymbol table */
+ /* but first check if a label of the same */
+ /* name exists */
+ if ((csym = findSym (LabelTab, NULL, name)))
+ werror (E_DUPLICATE_LABEL, label->name);
+ else
+ addSym (LabelTab, label, name, label->level, 0, 0);
+
+ label->isitmp = 1;
+ label->islbl = 1;
+ label->key = labelKey++;
+ rValue = newNode (LABEL, newAst_VALUE (symbolVal (label)), stmnt);
+ rValue->filename = NULL;
+ rValue->lineno = 0;
+
+ return rValue;
+}
+
+/*-----------------------------------------------------------------*/
+/* createCase - generates the parsetree for a case statement */
+/*-----------------------------------------------------------------*/
+ast *
+createCase (ast * swStat, ast * caseVal, ast * stmnt)
+{
+ char caseLbl[SDCC_NAME_MAX + 1];
+ ast *rexpr;
+ value *val;
+
+ /* if the switch statement does not exist */
+ /* then case is out of context */
+ if (!swStat)
+ {
+ werrorfl (caseVal->filename, caseVal->lineno, E_CASE_CONTEXT);
+ return NULL;
+ }
+
+ caseVal = decorateType (resolveSymbols (caseVal), RESULT_TYPE_NONE);
+ /* if not a constant then error */
+ if (!IS_LITERAL (caseVal->ftype))
+ {
+ werrorfl (caseVal->filename, caseVal->lineno, E_CASE_CONSTANT);
+ return NULL;
+ }
+
+ /* if not a integer than error */
+ if (!IS_INTEGRAL (caseVal->ftype))
+ {
+ werrorfl (caseVal->filename, caseVal->lineno, E_CASE_NON_INTEGER);
+ return NULL;
+ }
+
+ /* find the end of the switch values chain */
+ if (!(val = swStat->values.switchVals.swVals))
+ swStat->values.switchVals.swVals = caseVal->opval.val;
+ else
+ {
+ /* also order the cases according to value */
+ value *pval = NULL;
+ int cVal = (int) ulFromVal (caseVal->opval.val);
+ while (val && (int) ulFromVal (val) < cVal)
+ {
+ pval = val;
+ val = val->next;
+ }
+
+ /* if we reached the end then */
+ if (!val)
+ {
+ pval->next = caseVal->opval.val;
+ }
+ else if ((int) ulFromVal (val) == cVal)
+ {
+ werrorfl (caseVal->filename, caseVal->lineno, E_DUPLICATE_LABEL,
+ "case");
+ return NULL;
+ }
+ else
+ {
+ /* we found a value greater than */
+ /* the current value we must add this */
+ /* before the value */
+ caseVal->opval.val->next = val;
+
+ /* if this was the first in chain */
+ if (swStat->values.switchVals.swVals == val)
+ swStat->values.switchVals.swVals =
+ caseVal->opval.val;
+ else
+ pval->next = caseVal->opval.val;
+ }
+
+ }
+
+ /* create the case label */
+ SNPRINTF(caseLbl, sizeof(caseLbl),
+ "_case_%d_%d",
+ swStat->values.switchVals.swNum,
+ (int) ulFromVal (caseVal->opval.val));
+
+ rexpr = createLabel (newSymbol (caseLbl, 0), stmnt);
+ rexpr->filename = 0;
+ rexpr->lineno = 0;
+ return rexpr;
+}
+
+/*-----------------------------------------------------------------*/
+/* createDefault - creates the parse tree for the default statement */
+/*-----------------------------------------------------------------*/
+ast *
+createDefault (ast * swStat, ast * defaultVal, ast * stmnt)
+{
+ char defLbl[SDCC_NAME_MAX + 1];
+
+ /* if the switch statement does not exist */
+ /* then case is out of context */
+ if (!swStat)
+ {
+ werrorfl (defaultVal->filename, defaultVal->lineno, E_CASE_CONTEXT);
+ return NULL;
+ }
+
+ if (swStat->values.switchVals.swDefault)
+ {
+ werrorfl (defaultVal->filename, defaultVal->lineno, E_DUPLICATE_LABEL,
+ "default");
+ return NULL;
+ }
+
+ /* turn on the default flag */
+ swStat->values.switchVals.swDefault = 1;
+
+ /* create the label */
+ SNPRINTF (defLbl, sizeof(defLbl),
+ "_default_%d", swStat->values.switchVals.swNum);
+ return createLabel (newSymbol (defLbl, 0), stmnt);
+}
+
+/*-----------------------------------------------------------------*/
+/* createIf - creates the parsetree for the if statement */
+/*-----------------------------------------------------------------*/
+ast *
+createIf (ast * condAst, ast * ifBody, ast * elseBody)
+{
+ static int Lblnum = 0;
+ ast *ifTree;
+ symbol *ifTrue, *ifFalse, *ifEnd;
+
+ /* if neither exists */
+ if (!elseBody && !ifBody) {
+ // if there are no side effects (i++, j() etc)
+ if (!hasSEFcalls(condAst)) {
+ return condAst;
+ }
+ }
+
+ /* create the labels */
+ SNPRINTF (buffer, sizeof(buffer), "_iffalse_%d", Lblnum);
+ ifFalse = newSymbol (buffer, NestLevel);
+ /* if no else body then end == false */
+ if (!elseBody)
+ ifEnd = ifFalse;
+ else
+ {
+ SNPRINTF(buffer, sizeof(buffer), "_ifend_%d", Lblnum);
+ ifEnd = newSymbol (buffer, NestLevel);
+ }
+
+ SNPRINTF (buffer, sizeof(buffer), "_iftrue_%d", Lblnum);
+ ifTrue = newSymbol (buffer, NestLevel);
+
+ Lblnum++;
+
+ /* attach the ifTrue label to the top of it body */
+ ifBody = createLabel (ifTrue, ifBody);
+ /* attach a goto end to the ifBody if else is present */
+ if (elseBody)
+ {
+ ifBody = newNode (NULLOP, ifBody,
+ newNode (GOTO,
+ newAst_VALUE (symbolVal (ifEnd)),
+ NULL));
+ /* put the elseLabel on the else body */
+ elseBody = createLabel (ifFalse, elseBody);
+ /* out the end at the end of the body */
+ elseBody = newNode (NULLOP,
+ elseBody,
+ createLabel (ifEnd, NULL));
+ }
+ else
+ {
+ ifBody = newNode (NULLOP, ifBody,
+ createLabel (ifFalse, NULL));
+ }
+ condAst = backPatchLabels (condAst, ifTrue, ifFalse);
+ if (IS_IFX (condAst))
+ ifTree = condAst;
+ else
+ ifTree = newIfxNode (condAst, ifTrue, ifFalse);
+
+ return newNode (NULLOP, ifTree,
+ newNode (NULLOP, ifBody, elseBody));
+
+}
+
+/*-----------------------------------------------------------------*/
+/* createDo - creates parse tree for do */
+/* _dobody_n: */
+/* statements */
+/* _docontinue_n: */
+/* condition_expression +-> trueLabel -> _dobody_n */
+/* | */
+/* +-> falseLabel-> _dobreak_n */
+/* _dobreak_n: */
+/*-----------------------------------------------------------------*/
+ast *
+createDo (symbol * trueLabel, symbol * continueLabel,
+ symbol * falseLabel, ast * condAst, ast * doBody)
+{
+ ast *doTree;
+
+
+ /* if the body does not exist then it is simple */
+ if (!doBody)
+ {
+ condAst = backPatchLabels (condAst, continueLabel, falseLabel);
+ doTree = (IS_IFX (condAst) ? createLabel (continueLabel, condAst)
+ : newNode (IFX, createLabel (continueLabel, condAst), NULL));
+ doTree->trueLabel = continueLabel;
+ doTree->falseLabel = NULL;
+
+ doTree = newNode (NULLOP, doTree, createLabel (falseLabel, NULL));
+ return doTree;
+ }
+
+ /* otherwise we have a body */
+ condAst = backPatchLabels (condAst, trueLabel, falseLabel);
+
+ /* attach the body label to the top */
+ doBody = createLabel (trueLabel, doBody);
+ /* attach the continue label to end of body */
+ doBody = newNode (NULLOP, doBody,
+ createLabel (continueLabel, NULL));
+
+ /* now put the break label at the end */
+ if (IS_IFX (condAst))
+ doTree = condAst;
+ else
+ doTree = newIfxNode (condAst, trueLabel, falseLabel);
+
+ doTree = newNode (NULLOP, doTree, createLabel (falseLabel, NULL));
+
+ /* putting it together */
+ return newNode (NULLOP, doBody, doTree);
+}
+
+/*-----------------------------------------------------------------*/
+/* createFor - creates parse tree for 'for' statement */
+/* initExpr */
+/* _forcond_n: */
+/* condExpr +-> trueLabel -> _forbody_n */
+/* | */
+/* +-> falseLabel-> _forbreak_n */
+/* _forbody_n: */
+/* statements */
+/* _forcontinue_n: */
+/* loopExpr */
+/* goto _forcond_n ; */
+/* _forbreak_n: */
+/*-----------------------------------------------------------------*/
+ast *
+createFor (symbol * trueLabel, symbol * continueLabel,
+ symbol * falseLabel, symbol * condLabel,
+ ast * initExpr, ast * condExpr, ast * loopExpr,
+ ast * forBody)
+{
+ ast *forTree;
+
+ /* if loopexpression not present then we can generate it */
+ /* the same way as a while */
+ if (!loopExpr)
+ return newNode (NULLOP, initExpr,
+ createWhile (trueLabel, continueLabel,
+ falseLabel, condExpr, forBody));
+ /* vanilla for statement */
+ condExpr = backPatchLabels (condExpr, trueLabel, falseLabel);
+
+ if (condExpr && !IS_IFX (condExpr))
+ condExpr = newIfxNode (condExpr, trueLabel, falseLabel);
+
+
+ /* attach condition label to condition */
+ condExpr = createLabel (condLabel, condExpr);
+
+ /* attach body label to body */
+ forBody = createLabel (trueLabel, forBody);
+
+ /* attach continue to forLoop expression & attach */
+ /* goto the forcond @ and of loopExpression */
+ loopExpr = createLabel (continueLabel,
+ newNode (NULLOP,
+ loopExpr,
+ newNode (GOTO,
+ newAst_VALUE (symbolVal (condLabel)),
+ NULL)));
+ /* now start putting them together */
+ forTree = newNode (NULLOP, initExpr, condExpr);
+ forTree = newNode (NULLOP, forTree, forBody);
+ forTree = newNode (NULLOP, forTree, loopExpr);
+ /* finally add the break label */
+ forTree = newNode (NULLOP, forTree,
+ createLabel (falseLabel, NULL));
+ return forTree;
+}
+
+/*-----------------------------------------------------------------*/
+/* createWhile - creates parse tree for while statement */
+/* the while statement will be created as follows */
+/* */
+/* _while_continue_n: */
+/* condition_expression +-> trueLabel -> _while_boby_n */
+/* | */
+/* +-> falseLabel -> _while_break_n */
+/* _while_body_n: */
+/* statements */
+/* goto _while_continue_n */
+/* _while_break_n: */
+/*-----------------------------------------------------------------*/
+ast *
+createWhile (symbol * trueLabel, symbol * continueLabel,
+ symbol * falseLabel, ast * condExpr, ast * whileBody)
+{
+ ast *whileTree;
+
+ /* put the continue label */
+ condExpr = backPatchLabels (condExpr, trueLabel, falseLabel);
+ condExpr = createLabel (continueLabel, condExpr);
+ condExpr->filename = NULL;
+ condExpr->lineno = 0;
+
+ /* put the body label in front of the body */
+ whileBody = createLabel (trueLabel, whileBody);
+ whileBody->filename = NULL;
+ whileBody->lineno = 0;
+ /* put a jump to continue at the end of the body */
+ /* and put break label at the end of the body */
+ whileBody = newNode (NULLOP,
+ whileBody,
+ newNode (GOTO,
+ newAst_VALUE (symbolVal (continueLabel)),
+ createLabel (falseLabel, NULL)));
+
+ /* put it all together */
+ if (IS_IFX (condExpr))
+ whileTree = condExpr;
+ else
+ {
+ whileTree = newNode (IFX, condExpr, NULL);
+ /* put the true & false labels in place */
+ whileTree->trueLabel = trueLabel;
+ whileTree->falseLabel = falseLabel;
+ }
+
+ return newNode (NULLOP, whileTree, whileBody);
+}
+
+/*-----------------------------------------------------------------*/
+/* isShiftRightLitVal _BitAndLitVal - helper function */
+/*-----------------------------------------------------------------*/
+static ast *
+isShiftRightLitVal_BitAndLitVal (ast * tree)
+{
+ /* if this is not a bit and */
+ if (!IS_BITAND (tree))
+ return NULL;
+
+ /* will look for tree of the form
+ ( expr >> litval2) & litval1 */
+ if (!IS_AST_LIT_VALUE (tree->right))
+ return NULL;
+
+ if (!IS_RIGHT_OP (tree->left))
+ return NULL;
+
+ if (!IS_AST_LIT_VALUE (tree->left->right))
+ return NULL;
+
+ return tree->left->left;
+}
+
+/*-----------------------------------------------------------------*/
+/* isBitAndPowOf2 - helper function */
+/*-----------------------------------------------------------------*/
+static int
+isBitAndPow2 (ast * tree)
+{
+ /* if this is not a bit and */
+ if (!IS_BITAND (tree))
+ return -1;
+
+ /* will look for tree of the form
+ ( expr & (1 << litval) */
+ if (!IS_AST_LIT_VALUE (tree->right))
+ return -1;
+
+ return powof2 (AST_ULONG_VALUE (tree->right));
+}
+
+/*-----------------------------------------------------------------*/
+/* optimizeGetHbit - get highest order bit of the expression */
+/*-----------------------------------------------------------------*/
+ast *
+optimizeGetHbit (ast * tree, RESULT_TYPE resultType)
+{
+ unsigned int i, j;
+ ast * expr;
+
+ expr = isShiftRightLitVal_BitAndLitVal(tree);
+ if (expr)
+ {
+ if ((AST_ULONG_VALUE (tree->right) != 1) ||
+ ((i = AST_ULONG_VALUE (tree->left->right)) !=
+ (j = (getSize (TTYPE (expr)) * 8 - 1))))
+ expr = NULL;
+ }
+ if (!expr && (resultType == RESULT_TYPE_BIT))
+ {
+ expr = tree->left;
+ if (isBitAndPow2 (tree) != (signed)getSize (TTYPE (expr)) * 8 - 1)
+ expr = NULL;
+ }
+ if (!expr)
+ return tree;
+
+ /* make sure the port supports GETHBIT */
+ if (port->hasExtBitOp
+ && !port->hasExtBitOp(GETHBIT, getSize (TTYPE (expr))))
+ return tree;
+
+ return decorateType (newNode (GETHBIT, expr, NULL), RESULT_TYPE_NONE);
+}
+
+/*-----------------------------------------------------------------*/
+/* optimizeGetAbit - get a single bit of the expression */
+/*-----------------------------------------------------------------*/
+ast *
+optimizeGetAbit (ast * tree, RESULT_TYPE resultType)
+{
+ ast * expr;
+ ast * count = NULL;
+
+ expr = isShiftRightLitVal_BitAndLitVal(tree);
+ if (expr)
+ {
+ if (AST_ULONG_VALUE (tree->right) != 1)
+ expr = NULL;
+ count = tree->left->right;
+ }
+ if (!expr && (resultType == RESULT_TYPE_BIT))
+ {
+ int p2 = isBitAndPow2 (tree);
+ if (p2 >= 0)
+ {
+ expr = tree->left;
+ count = newAst_VALUE (valueFromLit (p2));
+ }
+ }
+ if (!expr)
+ return tree;
+
+ /* make sure the port supports GETABIT */
+ if (port->hasExtBitOp
+ && !port->hasExtBitOp(GETABIT, getSize (TTYPE (expr))))
+ return tree;
+
+ return decorateType (newNode (GETABIT, expr, count), RESULT_TYPE_NONE);
+
+}
+
+/*-----------------------------------------------------------------*/
+/* optimizeGetByte - get a byte of the expression */
+/*-----------------------------------------------------------------*/
+ast *
+optimizeGetByte (ast * tree, RESULT_TYPE resultType)
+{
+ unsigned int i = 0;
+ ast * expr;
+ ast * count = NULL;
+
+ expr = isShiftRightLitVal_BitAndLitVal(tree);
+ if (expr)
+ {
+ i = AST_ULONG_VALUE (tree->left->right);
+ count = tree->left->right;
+ if (AST_ULONG_VALUE (tree->right) != 0xFF)
+ expr = NULL;
+ }
+ if (!expr && resultType == RESULT_TYPE_CHAR)
+ {
+ /* if this is a right shift over a multiple of 8 */
+ if (IS_RIGHT_OP (tree) && IS_AST_LIT_VALUE (tree->right))
+ {
+ i = AST_ULONG_VALUE (tree->right);
+ count = tree->right;
+ expr = tree->left;
+ }
+ }
+ if (!expr || (i == 0) || (i % 8) || (i >= getSize (TTYPE (expr)) * 8))
+ return tree;
- if (!IS_ARITHMETIC(RTYPE(tree)) && !IS_PTR(RTYPE(tree))) {
- werror(E_PLUS_INVALID,"+=");
- goto errorTreeReturn;
- }
- RRVAL(tree) = 1;
- TETYPE(tree) = getSpec (TTYPE(tree) =
- computeType(LTYPE(tree),
- RTYPE(tree)));
+ /* make sure the port supports GETBYTE */
+ if (port->hasExtBitOp
+ && !port->hasExtBitOp(GETBYTE, getSize (TTYPE (expr))))
+ return tree;
- if (!tree->initMode && IS_CONSTANT(LETYPE(tree)))
- werror(E_CODE_WRITE," ");
+ return decorateType (newNode (GETBYTE, expr, count), RESULT_TYPE_NONE);
+}
- if (LRVAL(tree)) {
- werror(E_LVALUE_REQUIRED,"+=");
- goto errorTreeReturn ;
- }
+/*-----------------------------------------------------------------*/
+/* optimizeGetWord - get two bytes of the expression */
+/*-----------------------------------------------------------------*/
+ast *
+optimizeGetWord (ast * tree, RESULT_TYPE resultType)
+{
+ unsigned int i = 0;
+ ast * expr;
+ ast * count = NULL;
- tree->right = decorateType(newNode('+',copyAst(tree->left),tree->right));
- tree->opval.op = '=';
+ expr = isShiftRightLitVal_BitAndLitVal(tree);
+ if (expr)
+ {
+ i = AST_ULONG_VALUE (tree->left->right);
+ count = tree->left->right;
+ if (AST_ULONG_VALUE (tree->right) != 0xFFFF)
+ expr = NULL;
+ }
+ if (!expr && resultType == RESULT_TYPE_INT)
+ {
+ /* if this is a right shift over a multiple of 8 */
+ if (IS_RIGHT_OP (tree) && IS_AST_LIT_VALUE (tree->right))
+ {
+ i = AST_ULONG_VALUE (tree->right);
+ count = tree->right;
+ expr = tree->left;
+ }
+ }
+ if (!expr || (i == 0) || (i % 8) || (i >= (getSize (TTYPE (expr))-1) * 8))
+ return tree;
- propAsgType(tree);
+ /* make sure the port supports GETWORD */
+ if (port->hasExtBitOp
+ && !port->hasExtBitOp(GETWORD, getSize (TTYPE (expr))))
+ return tree;
- return tree;
+ return decorateType (newNode (GETWORD, expr, count), RESULT_TYPE_NONE);
+}
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* straight assignemnt */
- /*----------------------------*/
- case '=' :
- /* cannot be an aggregate */
- if (IS_AGGREGATE(LTYPE(tree))) {
- werror(E_AGGR_ASSIGN);
- goto errorTreeReturn;
- }
+/*-----------------------------------------------------------------*/
+/* optimizeRRCRLC :- optimize for Rotate Left/Right with carry */
+/*-----------------------------------------------------------------*/
+ast *
+optimizeRRCRLC (ast * root)
+{
+ /* will look for trees of the form
+ (?expr << 1) | (?expr >> 7) or
+ (?expr >> 7) | (?expr << 1) will make that
+ into a RLC : operation ..
+ Will also look for
+ (?expr >> 1) | (?expr << 7) or
+ (?expr << 7) | (?expr >> 1) will make that
+ into a RRC operation
+ note : by 7 I mean (number of bits required to hold the
+ variable -1 ) */
+ /* if the root operation is not a | operation then not */
+ if (!IS_BITOR (root))
+ return root;
- /* they should either match or be castable */
- if (checkType (LTYPE(tree),RTYPE(tree)) == 0) {
- werror(E_TYPE_MISMATCH,"assignment"," ");
- fprintf(stderr,"type --> '");
- printTypeChain (RTYPE(tree),stderr); fprintf(stderr,"' ");
- fprintf(stderr,"assigned to type --> '");
- printTypeChain (LTYPE(tree),stderr); fprintf(stderr,"'\n");
- goto errorTreeReturn ;
- }
+ /* I have to think of a better way to match patterns this sucks */
+ /* that aside let's start looking for the first case : I use a
+ negative check a lot to improve the efficiency */
+ /* (?expr << 1) | (?expr >> 7) */
+ if (IS_LEFT_OP (root->left) &&
+ IS_RIGHT_OP (root->right))
+ {
- /* if the left side of the tree is of type void
- then report error */
- if (IS_VOID(LTYPE(tree))) {
- werror(E_CAST_ZERO);
- fprintf(stderr,"type --> '");
- printTypeChain (RTYPE(tree),stderr); fprintf(stderr,"' ");
- fprintf(stderr,"assigned to type --> '");
- printTypeChain (LTYPE(tree),stderr); fprintf(stderr,"'\n");
- }
+ if (!SPEC_USIGN (TETYPE (root->left->left)))
+ return root;
- /* extra checks for pointer types */
- if (IS_PTR(LTYPE(tree)) && IS_PTR(RTYPE(tree)) &&
- !IS_GENPTR(LTYPE(tree))) {
- if (DCL_TYPE(LTYPE(tree)) != DCL_TYPE(RTYPE(tree)))
- werror(W_PTR_ASSIGN);
- }
+ if (!IS_AST_LIT_VALUE (root->left->right) ||
+ !IS_AST_LIT_VALUE (root->right->right))
+ goto tryNext0;
- TETYPE(tree) = getSpec(TTYPE(tree) =
- LTYPE(tree));
- RRVAL(tree) = 1;
- LLVAL(tree) = 1;
- if (!tree->initMode && IS_CONSTANT(LETYPE(tree)))
- werror(E_CODE_WRITE," ");
+ /* make sure it is the same expression */
+ if (!isAstEqual (root->left->left,
+ root->right->left))
+ goto tryNext0;
- if (LRVAL(tree)) {
- werror(E_LVALUE_REQUIRED,"=");
- goto errorTreeReturn ;
- }
+ if (AST_ULONG_VALUE (root->left->right) != 1)
+ goto tryNext0;
- propAsgType(tree);
+ if (AST_ULONG_VALUE (root->right->right) !=
+ (getSize (TTYPE (root->left->left)) * 8 - 1))
+ goto tryNext0;
- return tree ;
+ /* make sure the port supports RLC */
+ if (port->hasExtBitOp
+ && !port->hasExtBitOp(RLC, getSize (TTYPE (root->left->left))))
+ return root;
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* comma operator */
- /*----------------------------*/
- case ',' :
- TETYPE(tree) = getSpec(TTYPE(tree) = RTYPE(tree));
- return tree ;
+ /* whew got the first case : create the AST */
+ return newNode (RLC, root->left->left, NULL);
+ }
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* function call */
- /*----------------------------*/
- case CALL :
- parmNumber = 1;
+tryNext0:
+ /* check for second case */
+ /* (?expr >> 7) | (?expr << 1) */
+ if (IS_LEFT_OP (root->right) &&
+ IS_RIGHT_OP (root->left))
+ {
- if (processParms (tree->left,
- tree->left->args,
- tree->right,&parmNumber,TRUE))
- goto errorTreeReturn ;
+ if (!SPEC_USIGN (TETYPE (root->left->left)))
+ return root;
- if (options.stackAuto || IS_RENT(LETYPE(tree))) {
- tree->left->args = reverseVal(tree->left->args);
- reverseParms(tree->right);
- }
+ if (!IS_AST_LIT_VALUE (root->left->right) ||
+ !IS_AST_LIT_VALUE (root->right->right))
+ goto tryNext1;
- tree->args = tree->left->args ;
- TETYPE(tree) = getSpec (TTYPE(tree) = LTYPE(tree)->next);
- return tree;
+ /* make sure it is the same symbol */
+ if (!isAstEqual (root->left->left,
+ root->right->left))
+ goto tryNext1;
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* return statement */
- /*----------------------------*/
- case RETURN :
- if (!tree->right)
- goto voidcheck ;
+ if (AST_ULONG_VALUE (root->right->right) != 1)
+ goto tryNext1;
- if (checkType(currFunc->type->next,RTYPE(tree)) == 0) {
- werror(E_RETURN_MISMATCH);
- goto errorTreeReturn ;
- }
+ if (AST_ULONG_VALUE (root->left->right) !=
+ (getSize (TTYPE (root->left->left)) * 8 - 1))
+ goto tryNext1;
- if (IS_VOID(currFunc->type->next)
- && tree->right &&
- !IS_VOID(RTYPE(tree))) {
- werror(E_FUNC_VOID);
- goto errorTreeReturn ;
- }
+ /* make sure the port supports RLC */
+ if (port->hasExtBitOp
+ && !port->hasExtBitOp(RLC, getSize (TTYPE (root->left->left))))
+ return root;
- /* if there is going to be a casing required then add it */
- if (checkType(currFunc->type->next,RTYPE(tree)) < 0 )
- {
-#if 0 && defined DEMAND_INTEGER_PROMOTION
- if (IS_INTEGRAL(currFunc->type->next))
- {
- pushTypeCastToLeaves(currFunc->type->next, tree->right, &(tree->right));
- }
- else
-#endif
- {
- tree->right =
- decorateType(newNode(CAST,
- newAst_LINK(copyLinkChain(currFunc->type->next)),
- tree->right));
- }
- }
+ /* whew got the first case : create the AST */
+ return newNode (RLC, root->left->left, NULL);
- RRVAL(tree) = 1;
- return tree;
+ }
- voidcheck :
+tryNext1:
+ /* third case for RRC */
+ /* (?symbol >> 1) | (?symbol << 7) */
+ if (IS_LEFT_OP (root->right) &&
+ IS_RIGHT_OP (root->left))
+ {
- if (!IS_VOID(currFunc->type->next) && tree->right == NULL ) {
- werror(E_VOID_FUNC,currFunc->name);
- goto errorTreeReturn ;
- }
+ if (!SPEC_USIGN (TETYPE (root->left->left)))
+ return root;
- TTYPE(tree) = TETYPE(tree) = NULL ;
- return tree ;
+ if (!IS_AST_LIT_VALUE (root->left->right) ||
+ !IS_AST_LIT_VALUE (root->right->right))
+ goto tryNext2;
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* switch statement */
- /*----------------------------*/
- case SWITCH:
- /* the switch value must be an integer */
- if (!IS_INTEGRAL(LTYPE(tree))) {
- werror (E_SWITCH_NON_INTEGER);
- goto errorTreeReturn ;
- }
- LRVAL(tree) = 1;
- TTYPE(tree) = TETYPE(tree) = NULL ;
- return tree ;
+ /* make sure it is the same symbol */
+ if (!isAstEqual (root->left->left,
+ root->right->left))
+ goto tryNext2;
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* ifx Statement */
- /*----------------------------*/
- case IFX:
- tree->left = backPatchLabels(tree->left,
- tree->trueLabel,
- tree->falseLabel);
- TTYPE(tree) = TETYPE(tree) = NULL;
- return tree;
+ if (AST_ULONG_VALUE (root->left->right) != 1)
+ goto tryNext2;
- /*------------------------------------------------------------------*/
- /*----------------------------*/
- /* for Statement */
- /*----------------------------*/
- case FOR:
+ if (AST_ULONG_VALUE (root->right->right) !=
+ (getSize (TTYPE (root->left->left)) * 8 - 1))
+ goto tryNext2;
- decorateType(resolveSymbols(AST_FOR(tree,initExpr)));
- decorateType(resolveSymbols(AST_FOR(tree,condExpr)));
- decorateType(resolveSymbols(AST_FOR(tree,loopExpr)));
+ /* make sure the port supports RRC */
+ if (port->hasExtBitOp
+ && !port->hasExtBitOp(RRC, getSize (TTYPE (root->left->left))))
+ return root;
- /* if the for loop is reversible then
- reverse it otherwise do what we normally
- do */
- {
- symbol *sym ;
- ast *init, *end;
+ /* whew got the first case : create the AST */
+ return newNode (RRC, root->left->left, NULL);
- if (isLoopReversible (tree,&sym,&init,&end))
- return reverseLoop (tree,sym,init,end);
- else
- return decorateType(createFor ( AST_FOR(tree,trueLabel),
- AST_FOR(tree,continueLabel) ,
- AST_FOR(tree,falseLabel) ,
- AST_FOR(tree,condLabel) ,
- AST_FOR(tree,initExpr) ,
- AST_FOR(tree,condExpr) ,
- AST_FOR(tree,loopExpr),
- tree->left ) );
- }
- default :
- TTYPE(tree) = TETYPE(tree) = NULL ;
- return tree ;
}
+tryNext2:
+ /* fourth and last case for now */
+ /* (?symbol << 7) | (?symbol >> 1) */
+ if (IS_RIGHT_OP (root->right) &&
+ IS_LEFT_OP (root->left))
+ {
- /* some error found this tree will be killed */
- errorTreeReturn :
- TTYPE(tree) = TETYPE(tree) = newCharLink();
- tree->opval.op = NULLOP ;
- tree->isError = 1;
+ if (!SPEC_USIGN (TETYPE (root->left->left)))
+ return root;
- return tree ;
-}
+ if (!IS_AST_LIT_VALUE (root->left->right) ||
+ !IS_AST_LIT_VALUE (root->right->right))
+ return root;
-/*-----------------------------------------------------------------*/
-/* sizeofOp - processes size of operation */
-/*-----------------------------------------------------------------*/
-value *sizeofOp( sym_link *type)
-{
- char buff[10];
+ /* make sure it is the same symbol */
+ if (!isAstEqual (root->left->left,
+ root->right->left))
+ return root;
- /* get the size and convert it to character */
- sprintf (buff,"%d", getSize(type));
+ if (AST_ULONG_VALUE (root->right->right) != 1)
+ return root;
- /* now convert into value */
- return constVal (buff);
-}
+ if (AST_ULONG_VALUE (root->left->right) !=
+ (getSize (TTYPE (root->left->left)) * 8 - 1))
+ return root;
+ /* make sure the port supports RRC */
+ if (port->hasExtBitOp
+ && !port->hasExtBitOp(RRC, getSize (TTYPE (root->left->left))))
+ return root;
-#define IS_AND(ex) (ex->type == EX_OP && ex->opval.op == AND_OP )
-#define IS_OR(ex) (ex->type == EX_OP && ex->opval.op == OR_OP )
-#define IS_NOT(ex) (ex->type == EX_OP && ex->opval.op == '!' )
-#define IS_ANDORNOT(ex) (IS_AND(ex) || IS_OR(ex) || IS_NOT(ex))
-#define IS_IFX(ex) (ex->type == EX_OP && ex->opval.op == IFX )
-#define IS_LT(ex) (ex->type == EX_OP && ex->opval.op == '<' )
-#define IS_GT(ex) (ex->type == EX_OP && ex->opval.op == '>')
+ /* whew got the first case : create the AST */
+ return newNode (RRC, root->left->left, NULL);
+
+ }
+
+ /* not found return root */
+ return root;
+}
/*-----------------------------------------------------------------*/
-/* backPatchLabels - change and or not operators to flow control */
+/* optimizeSWAP :- optimize for nibble/byte/word swaps */
/*-----------------------------------------------------------------*/
-ast *backPatchLabels (ast *tree, symbol *trueLabel, symbol *falseLabel )
+ast *
+optimizeSWAP (ast * root)
{
+ /* will look for trees of the form
+ (?expr << 4) | (?expr >> 4) or
+ (?expr >> 4) | (?expr << 4) will make that
+ into a SWAP : operation ..
+ note : by 4 I mean (number of bits required to hold the
+ variable /2 ) */
+ /* if the root operation is not a | operation then not */
+ if (!IS_BITOR (root))
+ return root;
- if ( ! tree )
- return NULL ;
-
- if ( ! (IS_ANDORNOT(tree)))
- return tree ;
+ /* (?expr << 4) | (?expr >> 4) */
+ if ((IS_LEFT_OP (root->left) && IS_RIGHT_OP (root->right))
+ || (IS_RIGHT_OP (root->left) && IS_LEFT_OP (root->right)))
+ {
- /* if this an and */
- if (IS_AND(tree)) {
- static int localLbl = 0 ;
- symbol *localLabel ;
+ if (!SPEC_USIGN (TETYPE (root->left->left)))
+ return root;
- sprintf (buffer,"_and_%d",localLbl++);
- localLabel = newSymbol(buffer,NestLevel);
+ if (!IS_AST_LIT_VALUE (root->left->right) ||
+ !IS_AST_LIT_VALUE (root->right->right))
+ return root;
- tree->left = backPatchLabels (tree->left, localLabel,falseLabel);
+ /* make sure it is the same expression */
+ if (!isAstEqual (root->left->left,
+ root->right->left))
+ return root;
- /* if left is already a IFX then just change the if true label in that */
- if (!IS_IFX(tree->left))
- tree->left = newIfxNode(tree->left,localLabel,falseLabel);
+ if (AST_ULONG_VALUE (root->left->right) !=
+ (getSize (TTYPE (root->left->left)) * 4))
+ return root;
- tree->right = backPatchLabels(tree->right,trueLabel,falseLabel);
- /* right is a IFX then just join */
- if (IS_IFX(tree->right))
- return newNode(NULLOP,tree->left,createLabel(localLabel,tree->right));
+ if (AST_ULONG_VALUE (root->right->right) !=
+ (getSize (TTYPE (root->left->left)) * 4))
+ return root;
- tree->right = createLabel(localLabel,tree->right);
- tree->right = newIfxNode(tree->right,trueLabel,falseLabel);
+ /* make sure the port supports SWAP */
+ if (port->hasExtBitOp
+ && !port->hasExtBitOp(SWAP, getSize (TTYPE (root->left->left))))
+ return root;
- return newNode(NULLOP,tree->left,tree->right);
+ /* found it : create the AST */
+ return newNode (SWAP, root->left->left, NULL);
}
- /* if this is an or operation */
- if (IS_OR(tree)) {
- static int localLbl = 0 ;
- symbol *localLabel ;
- sprintf (buffer,"_or_%d",localLbl++);
- localLabel = newSymbol(buffer,NestLevel);
+ /* not found return root */
+ return root;
+}
- tree->left = backPatchLabels (tree->left, trueLabel,localLabel);
+/*-----------------------------------------------------------------*/
+/* optimizeCompare - optimizes compares for bit variables */
+/*-----------------------------------------------------------------*/
+static ast *
+optimizeCompare (ast * root)
+{
+ ast *optExpr = NULL;
+ value *vleft;
+ value *vright;
+ unsigned int litValue;
- /* if left is already a IFX then just change the if true label in that */
- if (!IS_IFX(tree->left))
- tree->left = newIfxNode(tree->left,trueLabel,localLabel);
+ /* if nothing then return nothing */
+ if (!root)
+ return NULL;
- tree->right = backPatchLabels(tree->right,trueLabel,falseLabel);
- /* right is a IFX then just join */
- if (IS_IFX(tree->right))
- return newNode(NULLOP,tree->left,createLabel(localLabel,tree->right));
+ /* if not a compare op then do leaves */
+ if (!IS_COMPARE_OP (root))
+ {
+ root->left = optimizeCompare (root->left);
+ root->right = optimizeCompare (root->right);
+ return root;
+ }
- tree->right = createLabel(localLabel,tree->right);
- tree->right = newIfxNode(tree->right,trueLabel,falseLabel);
+ /* if left & right are the same then depending
+ of the operation do */
+ if (isAstEqual (root->left, root->right))
+ {
+ switch (root->opval.op)
+ {
+ case '>':
+ case '<':
+ case NE_OP:
+ optExpr = newAst_VALUE (constCharVal (0));
+ break;
+ case GE_OP:
+ case LE_OP:
+ case EQ_OP:
+ optExpr = newAst_VALUE (constCharVal (1));
+ break;
+ }
- return newNode(NULLOP,tree->left,tree->right);
+ return decorateType (optExpr, RESULT_TYPE_NONE);
}
- /* change not */
- if (IS_NOT(tree)) {
- int wasnot = IS_NOT(tree->left);
- tree->left = backPatchLabels (tree->left,falseLabel,trueLabel);
+ vleft = (root->left->type == EX_VALUE ?
+ root->left->opval.val : NULL);
- /* if the left is already a IFX */
- if ( ! IS_IFX(tree->left) )
- tree->left = newNode (IFX,tree->left,NULL);
+ vright = (root->right->type == EX_VALUE ?
+ root->right->opval.val : NULL);
- if (wasnot) {
- tree->left->trueLabel = trueLabel ;
- tree->left->falseLabel= falseLabel ;
- } else {
- tree->left->trueLabel = falseLabel ;
- tree->left->falseLabel= trueLabel ;
- }
- return tree->left ;
- }
+ /* if left is a BITVAR in BITSPACE */
+ /* and right is a LITERAL then */
+ /* optimize else do nothing */
+ if (vleft && vright &&
+ IS_BITVAR (vleft->etype) &&
+ IN_BITSPACE (SPEC_OCLS (vleft->etype)) &&
+ IS_LITERAL (vright->etype))
+ {
- if (IS_IFX(tree)) {
- tree->trueLabel = trueLabel ;
- tree->falseLabel= falseLabel;
- }
+ /* if right side > 1 then comparison may never succeed */
+ if ((litValue = (int) ulFromVal (vright)) > 1)
+ {
+ werror (W_BAD_COMPARE);
+ goto noOptimize;
+ }
- return tree ;
-}
+ if (litValue)
+ {
+ switch (root->opval.op)
+ {
+ case '>': /* bit value greater than 1 cannot be */
+ werror (W_BAD_COMPARE);
+ goto noOptimize;
+ break;
+
+ case '<': /* bit value < 1 means 0 */
+ case NE_OP:
+ optExpr = newNode ('!', newAst_VALUE (vleft), NULL);
+ break;
+
+ case LE_OP: /* bit value <= 1 means no check */
+ optExpr = newAst_VALUE (vright);
+ break;
+
+ case GE_OP: /* bit value >= 1 means only check for = */
+ case EQ_OP:
+ optExpr = newAst_VALUE (vleft);
+ break;
+ }
+ }
+ else
+ { /* literal is zero */
+ switch (root->opval.op)
+ {
+ case '<': /* bit value < 0 cannot be */
+ werror (W_BAD_COMPARE);
+ goto noOptimize;
+ break;
+
+ case '>': /* bit value > 0 means 1 */
+ case NE_OP:
+ optExpr = newAst_VALUE (vleft);
+ break;
+
+ case LE_OP: /* bit value <= 0 means no check */
+ case GE_OP: /* bit value >= 0 means no check */
+ werror (W_BAD_COMPARE);
+ goto noOptimize;
+ break;
+
+ case EQ_OP: /* bit == 0 means ! of bit */
+ optExpr = newNode ('!', newAst_VALUE (vleft), NULL);
+ break;
+ }
+ }
+ return decorateType (resolveSymbols (optExpr), RESULT_TYPE_NONE);
+ } /* end-of-if of BITVAR */
+noOptimize:
+ return root;
+}
/*-----------------------------------------------------------------*/
-/* createBlock - create expression tree for block */
+/* addSymToBlock : adds the symbol to the first block we find */
/*-----------------------------------------------------------------*/
-ast *createBlock ( symbol *decl, ast *body )
+void
+addSymToBlock (symbol * sym, ast * tree)
{
- ast *ex ;
+ /* reached end of tree or a leaf */
+ if (!tree || IS_AST_LINK (tree) || IS_AST_VALUE (tree))
+ return;
- /* if the block has nothing */
- if (!body)
- return NULL;
+ /* found a block */
+ if (IS_AST_OP (tree) &&
+ tree->opval.op == BLOCK)
+ {
+
+ symbol *lsym = copySymbol (sym);
- ex = newNode(BLOCK,NULL,body);
- ex->values.sym = decl ;
+ lsym->next = AST_VALUES (tree, sym);
+ AST_VALUES (tree, sym) = lsym;
+ return;
+ }
- ex->right = ex->right ;
- ex->level++ ;
- ex->lineno = 0 ;
- return ex;
+ addSymToBlock (sym, tree->left);
+ addSymToBlock (sym, tree->right);
}
/*-----------------------------------------------------------------*/
-/* createLabel - creates the expression tree for labels */
+/* processRegParms - do processing for register parameters */
/*-----------------------------------------------------------------*/
-ast *createLabel ( symbol *label, ast *stmnt )
+static void
+processRegParms (value * args, ast * body)
{
- symbol *csym;
- char name[SDCC_NAME_MAX+1];
- ast *rValue ;
+ while (args)
+ {
+ if (IS_REGPARM (args->etype))
+ addSymToBlock (args->sym, body);
+ args = args->next;
+ }
+}
- /* must create fresh symbol if the symbol name */
- /* exists in the symbol table, since there can */
- /* be a variable with the same name as the labl */
- if ((csym = findSym (SymbolTab,NULL,label->name)) &&
- (csym->level == label->level))
- label = newSymbol(label->name,label->level);
+/*-----------------------------------------------------------------*/
+/* resetParmKey - resets the operandkeys for the symbols */
+/*-----------------------------------------------------------------*/
+DEFSETFUNC (resetParmKey)
+{
+ symbol *sym = item;
- /* change the name before putting it in add _*/
- sprintf (name,"%s",label->name);
+ sym->key = 0;
+ sym->defs = NULL;
+ sym->uses = NULL;
+ sym->remat = 0;
+ return 1;
+}
- /* put the label in the LabelSymbol table */
- /* but first check if a label of the same */
- /* name exists */
- if ( (csym = findSym(LabelTab,NULL,name)))
- werror(E_DUPLICATE_LABEL,label->name);
- else
- addSym (LabelTab, label, name,label->level,0);
+/*------------------------------------------------------------------*/
+/* fixupInlineLabel - change a label in an inlined function so that */
+/* it is always unique no matter how many times */
+/* the function is inlined. */
+/*------------------------------------------------------------------*/
+static void
+fixupInlineLabel (symbol * sym)
+{
+ char name[SDCC_NAME_MAX + 1];
- label->islbl = 1;
- label->key = labelKey++ ;
- rValue = newNode (LABEL,newAst_VALUE(symbolVal(label)),stmnt);
- rValue->lineno = 0;
+ SNPRINTF(name, sizeof(name), "%s_%d", sym->name, inlineState.count);
+ strcpy (sym->name, name);
+}
- return rValue ;
+/*------------------------------------------------------------------*/
+/* copyAstLoc - copy location information (file, line, block, etc.) */
+/* from one ast node to another */
+/*------------------------------------------------------------------*/
+static void
+copyAstLoc (ast * dest, ast * src)
+{
+ dest->filename = src->filename;
+ dest->lineno = src->lineno;
+ dest->level = src->level;
+ dest->block = src->block;
+ dest->seqPoint = src->seqPoint;
}
/*-----------------------------------------------------------------*/
-/* createCase - generates the parsetree for a case statement */
+/* fixupInline - perform various fixups on an inline function tree */
+/* to take into account that it is no longer a */
+/* stand-alone function. */
/*-----------------------------------------------------------------*/
-ast *createCase (ast *swStat, ast *caseVal, ast *stmnt )
+static void
+fixupInline (ast * tree, int level)
{
- char caseLbl[SDCC_NAME_MAX+1];
- ast *rexpr;
- value *val;
+ int savedBlockno = currBlockno;
- /* if the switch statement does not exist */
- /* then case is out of context */
- if (!swStat) {
- werror(E_CASE_CONTEXT);
- return NULL ;
- }
+ if (IS_AST_OP (tree) && (tree->opval.op == BLOCK))
+ {
+ symbol * decls;
- caseVal = decorateType(resolveSymbols(caseVal));
- /* if not a constant then error */
- if (!IS_LITERAL(caseVal->ftype)) {
- werror(E_CASE_CONSTANT);
- return NULL ;
- }
+ currBlockno = ++blockNo;
+ level++;
- /* if not a integer than error */
- if (!IS_INTEGRAL(caseVal->ftype)) {
- werror(E_CASE_NON_INTEGER);
- return NULL;
+ /* Add any declared variables back into the symbol table */
+ decls = tree->values.sym;
+ while (decls)
+ {
+ decls->level = level;
+ decls->block = currBlockno;
+ addSym (SymbolTab, decls, decls->name, decls->level, decls->block, 0);
+ decls = decls->next;
+ }
}
- /* find the end of the switch values chain */
- if (!(val = swStat->values.switchVals.swVals))
- swStat->values.switchVals.swVals = caseVal->opval.val ;
- else {
- /* also order the cases according to value */
- value *pval = NULL;
- int cVal = (int) floatFromVal(caseVal->opval.val);
- while (val && (int) floatFromVal(val) < cVal) {
- pval = val;
- val = val->next ;
- }
+ tree->level = level;
+ tree->block = currBlockno;
- /* if we reached the end then */
- if (!val) {
- pval->next = caseVal->opval.val;
- } else {
- /* we found a value greater than */
- /* the current value we must add this */
- /* before the value */
- caseVal->opval.val->next = val;
-
- /* if this was the first in chain */
- if (swStat->values.switchVals.swVals == val)
- swStat->values.switchVals.swVals =
- caseVal->opval.val;
- else
- pval->next = caseVal->opval.val;
- }
+ /* Update symbols */
+ if (IS_AST_VALUE (tree) &&
+ tree->opval.val->sym)
+ {
+ symbol * sym = tree->opval.val->sym;
+
+ sym->level = level;
+ sym->block = currBlockno;
+
+ sym->reqv = NULL;
+ SYM_SPIL_LOC (sym) = NULL;
+ sym->key = 0;
+ /* If the symbol is a label, we need to renumber it */
+ if (sym->islbl)
+ fixupInlineLabel (sym);
}
- /* create the case label */
- sprintf(caseLbl,"_case_%d_%d",
- swStat->values.switchVals.swNum,
- (int) floatFromVal(caseVal->opval.val));
+ /* Update IFX target labels */
+ if (tree->type == EX_OP && tree->opval.op == IFX)
+ {
+ if (tree->trueLabel)
+ fixupInlineLabel (tree->trueLabel);
+ if (tree->falseLabel)
+ fixupInlineLabel (tree->falseLabel);
+ }
- rexpr = createLabel(newSymbol(caseLbl,0),stmnt);
- rexpr->lineno = 0;
- return rexpr;
-}
+ /* Replace RETURN with optional assignment and a GOTO to the end */
+ /* of the inlined function */
+ if (tree->type == EX_OP && tree->opval.op == RETURN)
+ {
+ ast * assignTree = NULL;
+ ast * gotoTree;
-/*-----------------------------------------------------------------*/
-/* createDefault - creates the parse tree for the default statement*/
-/*-----------------------------------------------------------------*/
-ast *createDefault (ast *swStat, ast *stmnt)
-{
- char defLbl[SDCC_NAME_MAX+1];
+ if (inlineState.retsym && tree->right)
+ {
+ assignTree = newNode ('=',
+ newAst_VALUE (symbolVal (inlineState.retsym)),
+ tree->right);
+ copyAstLoc (assignTree, tree);
+ }
- /* if the switch statement does not exist */
- /* then case is out of context */
- if (!swStat) {
- werror(E_CASE_CONTEXT);
- return NULL ;
- }
+ gotoTree = newNode (GOTO,
+ newAst_VALUE (symbolVal (inlineState.retlab)),
+ NULL);
+ copyAstLoc (gotoTree, tree);
- /* turn on the default flag */
- swStat->values.switchVals.swDefault = 1 ;
+ tree->opval.op = NULLOP;
+ tree->left = assignTree;
+ tree->right = gotoTree;
+ }
- /* create the label */
- sprintf (defLbl,"_default_%d",swStat->values.switchVals.swNum);
- return createLabel(newSymbol(defLbl,0),stmnt);
-}
+ /* Update any children */
+ if (tree->left)
+ fixupInline (tree->left, level);
+ if (tree->right)
+ fixupInline (tree->right, level);
-/*-----------------------------------------------------------------*/
-/* createIf - creates the parsetree for the if statement */
-/*-----------------------------------------------------------------*/
-ast *createIf ( ast *condAst, ast *ifBody, ast *elseBody )
-{
- static int Lblnum = 0 ;
- ast *ifTree ;
- symbol *ifTrue , *ifFalse, *ifEnd ;
-
- /* if neither exists */
- if (! elseBody && !ifBody)
- return condAst ;
-
- /* create the labels */
- sprintf (buffer,"_iffalse_%d",Lblnum);
- ifFalse = newSymbol (buffer,NestLevel);
- /* if no else body then end == false */
- if ( ! elseBody )
- ifEnd = ifFalse ;
- else {
- sprintf (buffer,"_ifend_%d",Lblnum);
- ifEnd = newSymbol (buffer,NestLevel);
- }
-
- sprintf (buffer,"_iftrue_%d",Lblnum);
- ifTrue = newSymbol (buffer,NestLevel);
-
- Lblnum++ ;
-
- /* attach the ifTrue label to the top of it body */
- ifBody = createLabel(ifTrue,ifBody);
- /* attach a goto end to the ifBody if else is present */
- if ( elseBody ) {
- ifBody = newNode(NULLOP,ifBody,
- newNode(GOTO,
- newAst_VALUE(symbolVal(ifEnd)),
- NULL));
- /* put the elseLabel on the else body */
- elseBody = createLabel (ifFalse,elseBody);
- /* out the end at the end of the body */
- elseBody = newNode(NULLOP,
- elseBody,
- createLabel(ifEnd,NULL));
- }
- else {
- ifBody = newNode(NULLOP,ifBody,
- createLabel(ifFalse,NULL));
- }
- condAst = backPatchLabels (condAst,ifTrue,ifFalse);
- if (IS_IFX(condAst))
- ifTree = condAst;
- else
- ifTree = newIfxNode(condAst,ifTrue,ifFalse);
+ if (IS_AST_OP (tree) && (tree->opval.op == LABEL))
+ {
+ symbol * label = tree->left->opval.val->sym;
- return newNode(NULLOP,ifTree,
- newNode(NULLOP,ifBody,elseBody));
+ label->key = labelKey++;
+ /* Add this label back into the symbol table */
+ addSym (LabelTab, label, label->name, label->level, 0, 0);
+ }
+ if (IS_AST_OP (tree) && (tree->opval.op == BLOCK))
+ {
+ level--;
+ currBlockno = savedBlockno;
+ }
}
/*-----------------------------------------------------------------*/
-/* createDo - creates parse tree for do */
-/* _dobody_n: */
-/* statements */
-/* _docontinue_n: */
-/* condition_expression +-> trueLabel -> _dobody_n */
-/* | */
-/* +-> falseLabel-> _dobreak_n */
-/* _dobreak_n: */
+/* inlineAddDecl - add a variable declaration to an ast block. It */
+/* is also added to the symbol table if addSymTab */
+/* is nonzero. */
/*-----------------------------------------------------------------*/
-ast *createDo ( symbol *trueLabel, symbol *continueLabel,
- symbol *falseLabel, ast *condAst, ast *doBody )
+static void
+inlineAddDecl (symbol * sym, ast * block, int addSymTab)
{
- ast *doTree ;
-
-
- /* if the body does not exist then it is simple */
- if ( ! doBody ) {
- condAst = backPatchLabels(condAst,continueLabel,NULL);
- doTree = (IS_IFX(condAst) ? createLabel(continueLabel,condAst)
- : newNode(IFX,createLabel(continueLabel,condAst),NULL));
- doTree->trueLabel = continueLabel ;
- doTree->falseLabel= NULL ;
- return doTree ;
- }
+ sym->reqv = NULL;
+ SYM_SPIL_LOC (sym) = NULL;
+ sym->key = 0;
+ if (block != NULL)
+ {
+ symbol **decl = &(block->values.sym);
- /* otherwise we have a body */
- condAst = backPatchLabels(condAst,trueLabel,falseLabel);
+ sym->level = block->level;
+ sym->block = block->block;
- /* attach the body label to the top */
- doBody = createLabel(trueLabel,doBody);
- /* attach the continue label to end of body */
- doBody = newNode(NULLOP, doBody,
- createLabel(continueLabel,NULL));
+ while (*decl)
+ {
+ if (strcmp ((*decl)->name, sym->name) == 0)
+ return;
+ decl = &( (*decl)->next );
+ }
- /* now put the break label at the end */
- if (IS_IFX(condAst))
- doTree = condAst;
- else
- doTree = newIfxNode(condAst,trueLabel,falseLabel);
+ *decl = sym;
- doTree = newNode(NULLOP,doTree,createLabel(falseLabel,NULL));
+ if (addSymTab)
+ addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 0);
- /* putting it together */
- return newNode(NULLOP,doBody,doTree);
+ }
}
/*-----------------------------------------------------------------*/
-/* createFor - creates parse tree for 'for' statement */
-/* initExpr */
-/* _forcond_n: */
-/* condExpr +-> trueLabel -> _forbody_n */
-/* | */
-/* +-> falseLabel-> _forbreak_n */
-/* _forbody_n: */
-/* statements */
-/* _forcontinue_n: */
-/* loopExpr */
-/* goto _forcond_n ; */
-/* _forbreak_n: */
+/* inlineTempVar - create a temporary variable for inlining */
/*-----------------------------------------------------------------*/
-ast *createFor ( symbol *trueLabel, symbol *continueLabel ,
- symbol *falseLabel,symbol *condLabel ,
- ast *initExpr, ast *condExpr, ast *loopExpr,
- ast *forBody )
+static symbol *
+inlineTempVar (sym_link * type, int level)
{
- ast *forTree ;
-
- /* if loopexpression not present then we can generate it */
- /* the same way as a while */
- if ( ! loopExpr )
- return newNode(NULLOP,initExpr,
- createWhile (trueLabel, continueLabel,
- falseLabel,condExpr, forBody ));
- /* vanilla for statement */
- condExpr = backPatchLabels(condExpr,trueLabel,falseLabel);
-
- if (condExpr && !IS_IFX(condExpr))
- condExpr = newIfxNode(condExpr,trueLabel,falseLabel);
-
-
- /* attach condition label to condition */
- condExpr = createLabel(condLabel,condExpr);
-
- /* attach body label to body */
- forBody = createLabel(trueLabel,forBody);
+ symbol * sym;
+
+ sym = newSymbol (genSymName(level), level );
+ sym->type = copyLinkChain (type);
+ sym->etype = getSpec(sym->type);
+ SPEC_SCLS (sym->etype) = S_AUTO;
+ SPEC_OCLS (sym->etype) = NULL;
+ SPEC_EXTR (sym->etype) = 0;
+ SPEC_STAT (sym->etype) = 0;
+ if IS_SPEC (sym->type)
+ SPEC_VOLATILE (sym->type) = 0;
+ else
+ DCL_PTR_VOLATILE (sym->type) = 0;
+ SPEC_ABSA (sym->etype) = 0;
- /* attach continue to forLoop expression & attach */
- /* goto the forcond @ and of loopExpression */
- loopExpr = createLabel(continueLabel,
- newNode(NULLOP,
- loopExpr,
- newNode(GOTO,
- newAst_VALUE(symbolVal(condLabel)),
- NULL)));
- /* now start putting them together */
- forTree = newNode(NULLOP,initExpr,condExpr);
- forTree = newNode(NULLOP,forTree,forBody);
- forTree = newNode(NULLOP,forTree,loopExpr);
- /* finally add the break label */
- forTree = newNode(NULLOP,forTree,
- createLabel(falseLabel,NULL));
- return forTree ;
+ return sym;
}
/*-----------------------------------------------------------------*/
-/* createWhile - creates parse tree for while statement */
-/* the while statement will be created as follows */
-/* */
-/* _while_continue_n: */
-/* condition_expression +-> trueLabel -> _while_boby_n */
-/* | */
-/* +-> falseLabel -> _while_break_n*/
-/* _while_body_n: */
-/* statements */
-/* goto _while_continue_n */
-/* _while_break_n: */
+/* inlineFindParmRecurse - recursive function for inlineFindParm */
/*-----------------------------------------------------------------*/
-ast *createWhile (symbol *trueLabel, symbol *continueLabel,
- symbol *falseLabel,ast *condExpr, ast *whileBody )
+static ast *
+inlineFindParmRecurse (ast * parms, int *index)
{
- ast *whileTree ;
+ if (!parms)
+ return NULL;
- /* put the continue label */
- condExpr = backPatchLabels (condExpr,trueLabel,falseLabel);
- condExpr = createLabel(continueLabel,condExpr);
- condExpr->lineno = 0;
-
- /* put the body label in front of the body */
- whileBody = createLabel(trueLabel,whileBody);
- whileBody->lineno = 0;
- /* put a jump to continue at the end of the body */
- /* and put break label at the end of the body */
- whileBody = newNode(NULLOP,
- whileBody,
- newNode(GOTO,
- newAst_VALUE(symbolVal(continueLabel)),
- createLabel(falseLabel,NULL)));
-
- /* put it all together */
- if ( IS_IFX(condExpr) )
- whileTree = condExpr ;
- else {
- whileTree = newNode (IFX, condExpr,NULL );
- /* put the true & false labels in place */
- whileTree->trueLabel = trueLabel ;
- whileTree->falseLabel= falseLabel;
- }
+ if (parms->type == EX_OP && parms->opval.op == PARAM)
+ {
+ ast * p;
+
+ p=inlineFindParmRecurse (parms->left, index);
+ if (p)
+ return p;
+ p=inlineFindParmRecurse (parms->right, index);
+ if (p)
+ return p;
+ }
+ if (!*index)
+ return parms;
+ (*index)--;
+ return NULL;
+}
- return newNode(NULLOP,whileTree,whileBody );
+/*-----------------------------------------------------------------*/
+/* inlineFindParm - search an ast tree of parameters to find one */
+/* at a particular index (0=first parameter). */
+/* Returns NULL if not found. */
+/*-----------------------------------------------------------------*/
+static ast *
+inlineFindParm (ast * parms, int index)
+{
+ return inlineFindParmRecurse (parms, &index);
}
/*-----------------------------------------------------------------*/
-/* optimizeGetHbit - get highest order bit of the expression */
+/* expandInlineFuncs - replace calls to inline functions with the */
+/* function itself */
/*-----------------------------------------------------------------*/
-ast *optimizeGetHbit (ast *tree)
+static void
+expandInlineFuncs (ast * tree, ast * block)
{
- int i,j;
- /* if this is not a bit and */
- if (!IS_BITAND(tree))
- return tree;
+ if (IS_AST_OP (tree) && (tree->opval.op == CALL) && tree->left
+ && IS_AST_VALUE (tree->left) && tree->left->opval.val->sym)
+ {
+ symbol * func = tree->left->opval.val->sym;
+ symbol * csym;
- /* will look for tree of the form
- ( expr >> ((sizeof expr) -1) ) & 1 */
- if (!IS_AST_LIT_VALUE(tree->right))
- return tree;
+ /* The symbol is probably not bound yet, so find the real one */
+ csym = findSymWithLevel (SymbolTab, func);
+ if (csym)
+ func = csym;
- if (AST_LIT_VALUE(tree->right) != 1)
- return tree;
+ /* Is this an inline function that we can inline? */
+ if (IFFUNC_ISINLINE (func->type) && func->funcTree)
+ {
+ symbol * retsym = NULL;
+ symbol * retlab;
+ ast * inlinetree;
+ ast * inlinetree2;
+ ast * temptree;
+ value * args;
+ int argIndex;
+
+ /* Generate a label for the inlined function to branch to */
+ /* in case it contains a return statement */
+ retlab = newSymbol (genSymName(tree->level+1), tree->level+1 );
+ retlab->isitmp = 1;
+ retlab->islbl = 1;
+ inlineState.retlab = retlab;
+
+ /* Build the subtree for the inlined function in the form: */
+ /* { //inlinetree block */
+ /* { //inlinetree2 block */
+ /* inline_function_code; */
+ /* retlab: */
+ /* } */
+ /* } */
+ temptree = newNode (LABEL, newAst_VALUE (symbolVal (retlab)), NULL);
+ copyAstLoc (temptree, tree);
+ temptree = newNode (NULLOP, copyAst (func->funcTree), temptree);
+ copyAstLoc (temptree, tree);
+ temptree = newNode (BLOCK, NULL, temptree);
+ copyAstLoc (temptree, tree);
+ inlinetree2 = temptree;
+ inlinetree = newNode (BLOCK, NULL, inlinetree2);
+ copyAstLoc (inlinetree, tree);
+
+ /* To pass parameters to the inlined function, we need some */
+ /* intermediate variables. This avoids scoping problems */
+ /* when the parameter declaration names are used differently */
+ /* during the function call. For example, a function */
+ /* declared as func(int x, int y) but called as func(y,x). */
+ /* { //inlinetree block */
+ /* type1 temparg1 = argument1; */
+ /* ... */
+ /* typen tempargn = argumentn; */
+ /* { //inlinetree2 block */
+ /* type1 param1 = temparg1; */
+ /* ... */
+ /* typen paramn = tempargn; */
+ /* inline_function_code; */
+ /* retlab: */
+ /* } */
+ /* } */
+ args = FUNC_ARGS (func->type);
+ argIndex = 0;
+ while (args)
+ {
+ symbol * temparg;
+ ast * assigntree;
+ symbol * parm;
+ ast * passedarg = inlineFindParm (tree->right, argIndex);
+
+ if (!passedarg)
+ {
+ werror(E_TOO_FEW_PARMS);
+ break;
+ }
+
+ temparg = inlineTempVar (args->sym->type, tree->level+1);
+ inlineAddDecl (temparg, inlinetree, FALSE);
+
+ assigntree = newNode ('=',
+ newAst_VALUE (symbolVal (temparg)),
+ passedarg);
+ assigntree->initMode=1; // tell that assignment is initializer
+ inlinetree->right = newNode (NULLOP,
+ assigntree,
+ inlinetree->right);
+
+ parm = copySymbol (args->sym);
+ inlineAddDecl (parm, inlinetree2, FALSE);
+ parm->_isparm = 0;
+
+ assigntree = newNode ('=',
+ newAst_VALUE (symbolVal (parm)),
+ newAst_VALUE (symbolVal (temparg)));
+ assigntree->initMode=1; // tell that assignment is initializer
+ inlinetree2->right = newNode (NULLOP,
+ assigntree,
+ inlinetree2->right);
+
+ args = args->next;
+ argIndex++;
+ }
+
+ /* Handle the return type */
+ if (!IS_VOID (func->type->next))
+ {
+ /* Create a temporary symbol to hold the return value and */
+ /* join it with the inlined function using the comma */
+ /* operator. The fixupInline function will take care of */
+ /* changing return statements into assignments to retsym. */
+ /* (parameter passing and return label omitted for clarity) */
+ /* rettype retsym; */
+ /* ... */
+ /* {{inline_function_code}}, retsym */
+
+ retsym = inlineTempVar (func->type->next, tree->level);
+ inlineAddDecl (retsym, block, TRUE);
+
+ tree->opval.op = ',';
+ tree->left = inlinetree;
+ tree->right = newAst_VALUE (symbolVal (retsym));
+ }
+ else
+ {
+ tree->opval.op = NULLOP;
+ tree->left = NULL;
+ tree->right = inlinetree;
+ }
+ inlineState.retsym = retsym;
+
+ /* Renumber the various internal counters on the inlined */
+ /* function's tree nodes and symbols. Add the inlined */
+ /* function's local variables to the appropriate scope(s). */
+ /* Convert inlined return statements to an assignment to */
+ /* retsym (if needed) and a goto retlab. */
+ fixupInline (inlinetree, inlinetree->level);
+ inlineState.count++;
+ }
+ }
- if (!IS_RIGHT_OP(tree->left))
- return tree;
+ /* Recursively continue to search for functions to inline. */
+ if (IS_AST_OP (tree))
+ {
+ if (tree->opval.op == BLOCK)
+ block = tree;
- if (!IS_AST_LIT_VALUE(tree->left->right))
- return tree;
+ if (tree->left)
+ expandInlineFuncs (tree->left, block);
+ if (tree->right)
+ expandInlineFuncs (tree->right, block);
+ }
+}
- if ((i = (int) AST_LIT_VALUE(tree->left->right)) !=
- ( j = (getSize(TTYPE(tree->left->left))*8 - 1)))
- return tree;
+/*-----------------------------------------------------------------*/
+/* createFunction - This is the key node that calls the iCode for */
+/* generating the code for a function. Note code */
+/* is generated function by function, later when */
+/* add inter-procedural analysis this will change */
+/*-----------------------------------------------------------------*/
+ast *
+createFunction (symbol * name, ast * body)
+{
+ ast *ex;
+ symbol *csym;
+ int stack = 0;
+ sym_link *fetype;
+ iCode *piCode = NULL;
- return decorateType(newNode(GETHBIT,tree->left->left,NULL));
+ if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
+ fprintf (stderr, "SDCCast.c:createFunction(%s)\n", name->name);
-}
+ /* if check function return 0 then some problem */
+ if (checkFunction (name, NULL) == 0)
+ return NULL;
-/*-----------------------------------------------------------------*/
-/* optimizeRRCRLC :- optimize for Rotate Left/Right with carry */
-/*-----------------------------------------------------------------*/
-ast *optimizeRRCRLC ( ast *root )
-{
- /* will look for trees of the form
- (?expr << 1) | (?expr >> 7) or
- (?expr >> 7) | (?expr << 1) will make that
- into a RLC : operation ..
- Will also look for
- (?expr >> 1) | (?expr << 7) or
- (?expr << 7) | (?expr >> 1) will make that
- into a RRC operation
- note : by 7 I mean (number of bits required to hold the
- variable -1 ) */
- /* if the root operations is not a | operation the not */
- if (!IS_BITOR(root))
- return root ;
-
- /* I have to think of a better way to match patterns this sucks */
- /* that aside let start looking for the first case : I use a the
- negative check a lot to improve the efficiency */
- /* (?expr << 1) | (?expr >> 7) */
- if (IS_LEFT_OP(root->left) &&
- IS_RIGHT_OP(root->right) ) {
-
- if (!SPEC_USIGN(TETYPE(root->left->left)))
- return root;
+ /* create a dummy block if none exists */
+ if (!body)
+ body = newNode (BLOCK, NULL, NULL);
- if (!IS_AST_LIT_VALUE(root->left->right) ||
- !IS_AST_LIT_VALUE(root->right->right))
- goto tryNext0;
+ noLineno++;
- /* make sure it is the same expression */
- if (!isAstEqual(root->left->left,
- root->right->left))
- goto tryNext0;
+ /* check if the function name already in the symbol table */
+ if ((csym = findSym (SymbolTab, NULL, name->name)))
+ {
+ name = csym;
+ /* special case for compiler defined functions
+ we need to add the name to the publics list : this
+ actually means we are now compiling the compiler
+ support routine */
+ if (name->cdef)
+ {
+ addSet (&publics, name);
+ }
+ }
+ else
+ {
+ addSymChain (&name);
+ allocVariables (name);
+ }
+ name->lastLine = lexLineno;
+ currFunc = name;
- if (AST_LIT_VALUE(root->left->right) != 1 )
- goto tryNext0 ;
+ /* set the stack pointer */
+ stackPtr = -port->stack.direction * port->stack.call_overhead;
+ xstackPtr = 0;
- if (AST_LIT_VALUE(root->right->right) !=
- (getSize(TTYPE(root->left->left))*8 - 1))
- goto tryNext0 ;
+ if (IFFUNC_ISISR (name->type))
+ stackPtr -= port->stack.direction * port->stack.isr_overhead;
- /* whew got the first case : create the AST */
- return newNode(RLC,root->left->left,NULL);
+ if (IFFUNC_ISREENT (name->type) || options.stackAuto)
+ {
+ if (options.useXstack)
+ xstackPtr -= port->stack.direction * port->stack.reent_overhead;
+ else
+ stackPtr -= port->stack.direction * port->stack.reent_overhead;
}
- tryNext0:
- /* check for second case */
- /* (?expr >> 7) | (?expr << 1) */
- if (IS_LEFT_OP(root->right) &&
- IS_RIGHT_OP(root->left) ) {
-
- if (!SPEC_USIGN(TETYPE(root->left->left)))
- return root;
+ fetype = getSpec (name->type); /* get the specifier for the function */
+ /* if this is a reentrant function then */
+ if (IFFUNC_ISREENT (name->type))
+ reentrant++;
- if (!IS_AST_LIT_VALUE(root->left->right) ||
- !IS_AST_LIT_VALUE(root->right->right))
- goto tryNext1 ;
+ inlineState.count = 0;
+ expandInlineFuncs (body, NULL);
- /* make sure it is the same symbol */
- if (!isAstEqual(root->left->left,
- root->right->left))
- goto tryNext1 ;
+ if (FUNC_ISINLINE (name->type))
+ name->funcTree = copyAst (body);
- if (AST_LIT_VALUE(root->right->right) != 1 )
- goto tryNext1 ;
+ allocParms (FUNC_ARGS(name->type)); /* allocate the parameters */
- if (AST_LIT_VALUE(root->left->right) !=
- (getSize(TTYPE(root->left->left))*8 - 1))
- goto tryNext1 ;
+ /* do processing for parameters that are passed in registers */
+ processRegParms (FUNC_ARGS(name->type), body);
- /* whew got the first case : create the AST */
- return newNode(RLC,root->left->left,NULL);
+ /* set the stack pointer */
+ stackPtr = 0;
+ xstackPtr = -1;
- }
+ gatherImplicitVariables (body, NULL); /* move implicit variables into blocks */
- tryNext1:
- /* third case for RRC */
- /* (?symbol >> 1) | (?symbol << 7) */
- if (IS_LEFT_OP(root->right) &&
- IS_RIGHT_OP(root->left) ) {
+ /* allocate & autoinit the block variables */
+ processBlockVars (body, &stack, ALLOCATE);
- if (!SPEC_USIGN(TETYPE(root->left->left)))
- return root;
+ /* name needs to be mangled */
+ SNPRINTF (name->rname, sizeof(name->rname), "%s%s", port->fun_prefix, name->name);
- if (!IS_AST_LIT_VALUE(root->left->right) ||
- !IS_AST_LIT_VALUE(root->right->right))
- goto tryNext2;
+ body = resolveSymbols (body); /* resolve the symbols */
+ body = decorateType (body, RESULT_TYPE_NONE); /* propagateType & do semantic checks */
- /* make sure it is the same symbol */
- if (!isAstEqual(root->left->left,
- root->right->left))
- goto tryNext2;
+ /* save the stack information */
+ if (options.useXstack)
+ name->xstack = SPEC_STAK (fetype) = stack;
+ else
+ name->stack = SPEC_STAK (fetype) = stack;
+
+ ex = newAst_VALUE (symbolVal (name)); /* create name */
+ ex = newNode (FUNCTION, ex, body);
+ ex->values.args = FUNC_ARGS(name->type);
+ ex->decorated=1;
+ if (options.dump_tree)
+ PA(ex);
+ if (fatalError)
+ goto skipall;
+
+ /* Do not generate code for inline functions unless extern also. */
+#if 0
+ if (FUNC_ISINLINE (name->type) && !IS_EXTERN (fetype))
+ goto skipall;
+#else
+ /* Temporary hack: always generate code for static inline functions. */
+ /* Ideally static inline functions should only be generated if needed. */
+ if (FUNC_ISINLINE (name->type) && !IS_EXTERN (fetype) && !IS_STATIC (fetype))
+ goto skipall;
+#endif
- if (AST_LIT_VALUE(root->left->right) != 1 )
- goto tryNext2;
+ /* create the node & generate intermediate code */
+ GcurMemmap = code;
+ codeOutBuf = &code->oBuf;
+ piCode = iCodeFromAst (ex);
+ name->generated = 1;
- if (AST_LIT_VALUE(root->right->right) !=
- (getSize(TTYPE(root->left->left))*8 - 1))
- goto tryNext2;
+ if (fatalError)
+ goto skipall;
- /* whew got the first case : create the AST */
- return newNode(RRC,root->left->left,NULL);
+ eBBlockFromiCode (piCode);
+ /* if there are any statics then do them */
+ if (staticAutos)
+ {
+ GcurMemmap = statsg;
+ codeOutBuf = &statsg->oBuf;
+ eBBlockFromiCode (iCodeFromAst (decorateType (resolveSymbols (staticAutos), RESULT_TYPE_NONE)));
+ staticAutos = NULL;
}
- tryNext2:
- /* fourth and last case for now */
- /* (?symbol << 7) | (?symbol >> 1) */
- if (IS_RIGHT_OP(root->right) &&
- IS_LEFT_OP(root->left) ) {
-
- if (!SPEC_USIGN(TETYPE(root->left->left)))
- return root;
- if (!IS_AST_LIT_VALUE(root->left->right) ||
- !IS_AST_LIT_VALUE(root->right->right))
- return root;
+skipall:
- /* make sure it is the same symbol */
- if (!isAstEqual(root->left->left,
- root->right->left))
- return root;
+ /* dealloc the block variables */
+ processBlockVars (body, &stack, DEALLOCATE);
+ outputDebugStackSymbols();
+ /* deallocate paramaters */
+ deallocParms (FUNC_ARGS(name->type));
- if (AST_LIT_VALUE(root->right->right) != 1 )
- return root ;
+ if (IFFUNC_ISREENT (name->type))
+ reentrant--;
- if (AST_LIT_VALUE(root->left->right) !=
- (getSize(TTYPE(root->left->left))*8 - 1))
- return root ;
+ /* we are done freeup memory & cleanup */
+ noLineno--;
+ if (port->reset_labelKey)
+ labelKey = 1;
+ name->key = 0;
+ FUNC_HASBODY(name->type) = 1;
+ addSet (&operKeyReset, name);
+ applyToSet (operKeyReset, resetParmKey);
- /* whew got the first case : create the AST */
- return newNode(RRC,root->left->left,NULL);
+ if (options.debug)
+ cdbStructBlock(1);
- }
+ cleanUpLevel (LabelTab, 0);
+ cleanUpBlock (StructTab, 1);
+ cleanUpBlock (TypedefTab, 1);
- /* not found return root */
- return root;
+ xstack->syms = NULL;
+ istack->syms = NULL;
+ return NULL;
}
+
+#define INDENT(x,f) { int i ; fprintf (f, "%s:%d:", tree->filename, tree->lineno); for (i=0;i < x; i++) fprintf(f," "); }
/*-----------------------------------------------------------------*/
-/* optimizeCompare - otimizes compares for bit variables */
+/* ast_print : prints the ast (for debugging purposes) */
/*-----------------------------------------------------------------*/
-ast *optimizeCompare ( ast *root )
+
+void ast_print (ast * tree, FILE *outfile, int indent)
{
- ast *optExpr = NULL;
- value *vleft;
- value *vright;
- unsigned int litValue ;
- /* if nothing then return nothing */
- if (!root)
- return NULL ;
+ if (!tree) return ;
- /* if not a compare op then do leaves */
- if (!IS_COMPARE_OP(root)) {
- root->left = optimizeCompare (root->left);
- root->right= optimizeCompare (root->right);
- return root ;
- }
+ /* can print only decorated trees */
+ if (!tree->decorated) return;
- /* if left & right are the same then depending
- of the operation do */
- if (isAstEqual(root->left,root->right)) {
- switch (root->opval.op) {
- case '>' :
- case '<' :
- case NE_OP :
- optExpr = newAst_VALUE(constVal("0"));
- break;
- case GE_OP :
- case LE_OP :
- case EQ_OP :
- optExpr = newAst_VALUE(constVal("1"));
- break;
+ /* if any child is an error | this one is an error do nothing */
+ if (tree->isError ||
+ (tree->left && tree->left->isError) ||
+ (tree->right && tree->right->isError)) {
+ fprintf(outfile,"ERROR_NODE(%p)\n",tree);
}
- return decorateType(optExpr);
- }
-
- vleft = (root->left->type == EX_VALUE ?
- root->left->opval.val : NULL );
-
- vright = (root->right->type == EX_VALUE ?
- root->right->opval.val : NULL);
- /* if left is a BITVAR in BITSPACE */
- /* and right is a LITERAL then opt-*/
- /* imize else do nothing */
- if (vleft && vright &&
- IS_BITVAR(vleft->etype) &&
- IN_BITSPACE(SPEC_OCLS(vleft->etype)) &&
- IS_LITERAL(vright->etype)) {
-
- /* if right side > 1 then comparison may never succeed */
- if ( (litValue = (int) floatFromVal(vright)) > 1 ) {
- werror(W_BAD_COMPARE);
- goto noOptimize ;
+ /* print the line */
+ /* if not block & function */
+ if (tree->type == EX_OP &&
+ (tree->opval.op != FUNCTION &&
+ tree->opval.op != BLOCK &&
+ tree->opval.op != NULLOP)) {
}
- if ( litValue ) {
- switch (root->opval.op) {
- case '>' : /* bit value greater than 1 cannot be */
- werror(W_BAD_COMPARE);
- goto noOptimize ;
- break;
-
- case '<' : /* bit value < 1 means 0 */
- case NE_OP :
- optExpr = newNode('!',newAst_VALUE(vleft),NULL);
- break;
-
- case LE_OP : /* bit value <= 1 means no check */
- optExpr = newAst_VALUE(vright);
- break;
-
- case GE_OP : /* bit value >= 1 means only check for = */
- case EQ_OP :
- optExpr = newAst_VALUE(vleft);
- break;
- }
- } else { /* literal is zero */
- switch (root->opval.op) {
- case '<' : /* bit value < 0 cannot be */
- werror(W_BAD_COMPARE);
- goto noOptimize ;
- break;
-
- case '>' : /* bit value > 0 means 1 */
- case NE_OP :
- optExpr = newAst_VALUE(vleft);
- break;
-
- case LE_OP : /* bit value <= 0 means no check */
- case GE_OP : /* bit value >= 0 means no check */
- werror(W_BAD_COMPARE);
- goto noOptimize ;
- break;
-
- case EQ_OP : /* bit == 0 means ! of bit */
- optExpr = newNode('!',newAst_VALUE(vleft),NULL);
- break;
+ if (tree->opval.op == FUNCTION) {
+ int arg=0;
+ value *args=FUNC_ARGS(tree->left->opval.val->type);
+ fprintf(outfile,"FUNCTION (%s=%p) type (",
+ tree->left->opval.val->name, tree);
+ printTypeChain (tree->left->opval.val->type->next,outfile);
+ fprintf(outfile,") args (");
+ do {
+ if (arg) {
+ fprintf (outfile, ", ");
}
+ printTypeChain (args ? args->type : NULL, outfile);
+ arg++;
+ args= args ? args->next : NULL;
+ } while (args);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent);
+ ast_print(tree->right,outfile,indent);
+ return ;
}
- return decorateType(resolveSymbols(optExpr));
- } /* end-of-if of BITVAR */
-
- noOptimize :
- return root;
-}
-/*-----------------------------------------------------------------*/
-/* addSymToBlock : adds the symbol to the first block we find */
-/*-----------------------------------------------------------------*/
-void addSymToBlock (symbol *sym, ast *tree)
-{
- /* reached end of tree or a leaf */
- if (!tree || IS_AST_LINK(tree) || IS_AST_VALUE(tree))
- return ;
-
- /* found a block */
- if (IS_AST_OP(tree) &&
- tree->opval.op == BLOCK ) {
-
- symbol *lsym = copySymbol(sym);
-
- lsym->next = AST_VALUES(tree,sym);
- AST_VALUES(tree,sym) = lsym ;
- return ;
- }
-
- addSymToBlock(sym,tree->left);
- addSymToBlock(sym,tree->right);
-}
-
-/*-----------------------------------------------------------------*/
-/* processRegParms - do processing for register parameters */
-/*-----------------------------------------------------------------*/
-static void processRegParms (value *args, ast *body)
-{
- while (args) {
- if (IS_REGPARM(args->etype))
- addSymToBlock(args->sym,body);
- args = args->next;
+ if (tree->opval.op == BLOCK) {
+ symbol *decls = tree->values.sym;
+ INDENT(indent,outfile);
+ fprintf(outfile,"{\n");
+ while (decls) {
+ INDENT(indent+2,outfile);
+ fprintf(outfile,"DECLARE SYMBOL (%s=%p) type (",
+ decls->name, decls);
+ printTypeChain(decls->type,outfile);
+ fprintf(outfile,")\n");
+
+ decls = decls->next;
}
-}
-
-/*-----------------------------------------------------------------*/
-/* resetParmKey - resets the operandkeys for the symbols */
-/*-----------------------------------------------------------------*/
-DEFSETFUNC(resetParmKey)
-{
- symbol *sym = item;
-
- sym->key = 0 ;
- sym->defs = NULL ;
- sym->uses = NULL ;
- sym->remat= 0;
- return 1;
-}
-
-/*-----------------------------------------------------------------*/
-/* createFunction - This is the key node that calls the iCode for */
-/* generating the code for a function. Note code */
-/* is generated function by function, later when */
-/* add inter-procedural analysis this will change */
-/*-----------------------------------------------------------------*/
-ast *createFunction (symbol *name, ast *body )
-{
- ast *ex ;
- symbol *csym;
- int stack = 0 ;
- sym_link *fetype;
- iCode *piCode = NULL;
-
- /* if check function return 0 then some problem */
- if (checkFunction (name) == 0)
- return NULL;
-
- /* create a dummy block if none exists */
- if (!body)
- body = newNode(BLOCK,NULL,NULL);
-
- noLineno++ ;
-
- /* check if the function name already in the symbol table */
- if ((csym = findSym (SymbolTab,NULL,name->name))) {
- name = csym ;
- /* special case for compiler defined functions
- we need to add the name to the publics list : this
- actually means we are now compiling the compiler
- support routine */
- if (name->cdef) {
- addSet(&publics,name);
+ ast_print(tree->right,outfile,indent+2);
+ INDENT(indent,outfile);
+ fprintf(outfile,"}\n");
+ return;
+ }
+ if (tree->opval.op == NULLOP) {
+ ast_print(tree->left,outfile,indent);
+ ast_print(tree->right,outfile,indent);
+ return ;
}
+ INDENT(indent,outfile);
+
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* leaf has been reached */
+ /*----------------------------*/
+ /* if this is of type value */
+ /* just get the type */
+ if (tree->type == EX_VALUE) {
+
+ if (IS_LITERAL (tree->opval.val->etype)) {
+ fprintf(outfile,"CONSTANT (%p) value = ", tree);
+ if (SPEC_USIGN (tree->opval.val->etype))
+ fprintf(outfile,"%u", (TYPE_TARGET_ULONG) ulFromVal(tree->opval.val));
+ else
+ fprintf(outfile,"%d", (TYPE_TARGET_LONG) ulFromVal(tree->opval.val));
+ fprintf(outfile,", 0x%x, %f", (TYPE_TARGET_ULONG) ulFromVal(tree->opval.val),
+ floatFromVal(tree->opval.val));
+ } else if (tree->opval.val->sym) {
+ /* if the undefined flag is set then give error message */
+ if (tree->opval.val->sym->undefined) {
+ fprintf(outfile,"UNDEFINED SYMBOL ");
+ } else {
+ fprintf(outfile,"SYMBOL ");
+ }
+ fprintf(outfile,"(%s=%p @ %p)",
+ tree->opval.val->sym->name, tree, tree->opval.val->sym);
}
- else {
- addSymChain(name);
- allocVariables(name);
+ if (tree->ftype) {
+ fprintf(outfile," type (");
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ } else {
+ fprintf(outfile,"\n");
}
- name->lastLine = yylineno;
- currFunc = name ;
- processFuncArgs(currFunc,0);
-
- /* set the stack pointer */
- /* PENDING: check this for the mcs51 */
- stackPtr = -port->stack.direction * port->stack.call_overhead;
- if (IS_ISR(name->etype))
- stackPtr -= port->stack.direction * port->stack.isr_overhead;
- if (IS_RENT(name->etype) || options.stackAuto)
- stackPtr -= port->stack.direction * port->stack.reent_overhead;
+ return ;
+ }
- xstackPtr = -port->stack.direction * port->stack.call_overhead;
+ /* if type link for the case of cast */
+ if (tree->type == EX_LINK) {
+ fprintf(outfile,"TYPENODE (%p) type = (",tree);
+ printTypeChain(tree->opval.lnk,outfile);
+ fprintf(outfile,")\n");
+ return ;
+ }
- fetype = getSpec(name->type); /* get the specifier for the function */
- /* if this is a reentrant function then */
- if (IS_RENT(fetype))
- reentrant++ ;
- allocParms (name->args); /* allocate the parameters */
+ /* depending on type of operator do */
- /* do processing for parameters that are passed in registers */
- processRegParms (name->args,body);
+ switch (tree->opval.op) {
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* array node */
+ /*----------------------------*/
+ case '[':
+ fprintf(outfile,"ARRAY_OP (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
- /* set the stack pointer */
- stackPtr = 0;
- xstackPtr= -1;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* struct/union */
+ /*----------------------------*/
+ case '.':
+ fprintf(outfile,"STRUCT_ACCESS (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
- /* allocate & autoinit the block variables */
- processBlockVars (body, &stack,ALLOCATE);
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* struct/union pointer */
+ /*----------------------------*/
+ case PTR_OP:
+ fprintf(outfile,"PTR_ACCESS (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
- /* save the stack information */
- if (options.useXstack)
- name->xstack = SPEC_STAK(fetype) = stack;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* ++/-- operation */
+ /*----------------------------*/
+ case INC_OP:
+ if (tree->left)
+ fprintf(outfile,"post-");
else
- name->stack = SPEC_STAK(fetype) = stack;
+ fprintf(outfile,"pre-");
+ fprintf(outfile,"INC_OP (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2); /* postincrement case */
+ ast_print(tree->right,outfile,indent+2); /* preincrement case */
+ return ;
- /* name needs to be mangled */
- sprintf (name->rname,"%s%s", port->fun_prefix, name->name);
+ case DEC_OP:
+ if (tree->left)
+ fprintf(outfile,"post-");
+ else
+ fprintf(outfile,"pre-");
+ fprintf(outfile,"DEC_OP (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2); /* postdecrement case */
+ ast_print(tree->right,outfile,indent+2); /* predecrement case */
+ return ;
- body = resolveSymbols(body); /* resolve the symbols */
- body = decorateType (body); /* propagateType & do semantic checks */
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* bitwise and */
+ /*----------------------------*/
+ case '&':
+ if (tree->right) {
+ fprintf(outfile,"& (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ } else {
+ fprintf(outfile,"ADDRESS_OF (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ }
+ return ;
+ /*----------------------------*/
+ /* bitwise or */
+ /*----------------------------*/
+ case '|':
+ fprintf(outfile,"OR (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* bitwise xor */
+ /*----------------------------*/
+ case '^':
+ fprintf(outfile,"XOR (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
- ex = newAst_VALUE(symbolVal(name)); /* create name */
- ex = newNode (FUNCTION,ex,body);
- ex->values.args = name->args ;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* division */
+ /*----------------------------*/
+ case '/':
+ fprintf(outfile,"DIV (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* modulus */
+ /*----------------------------*/
+ case '%':
+ fprintf(outfile,"MOD (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
- if (fatalError) {
- werror(E_FUNC_NO_CODE,name->name);
- goto skipall ;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* address dereference */
+ /*----------------------------*/
+ case '*': /* can be unary : if right is null then unary operation */
+ if (!tree->right) {
+ fprintf(outfile,"DEREF (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ return ;
}
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* multiplication */
+ /*----------------------------*/
+ fprintf(outfile,"MULT (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
- /* create the node & generate intermediate code */
- codeOutFile = code->oFile;
- piCode = iCodeFromAst(ex);
- if (fatalError) {
- werror(E_FUNC_NO_CODE,name->name);
- goto skipall ;
- }
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* unary '+' operator */
+ /*----------------------------*/
+ case '+':
+ /* if unary plus */
+ if (!tree->right) {
+ fprintf(outfile,"UPLUS (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ } else {
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* addition */
+ /*----------------------------*/
+ fprintf(outfile,"ADD (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ }
+ return;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* unary '-' */
+ /*----------------------------*/
+ case '-': /* can be unary */
+ if (!tree->right) {
+ fprintf(outfile,"UMINUS (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ } else {
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* subtraction */
+ /*----------------------------*/
+ fprintf(outfile,"SUB (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ }
+ return;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* complement */
+ /*----------------------------*/
+ case '~':
+ fprintf(outfile,"COMPL (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ return ;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* not */
+ /*----------------------------*/
+ case '!':
+ fprintf(outfile,"NOT (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ return ;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* shift */
+ /*----------------------------*/
+ case RRC:
+ fprintf(outfile,"RRC (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ return ;
- eBBlockFromiCode(piCode);
+ case RLC:
+ fprintf(outfile,"RLC (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ return ;
+ case SWAP:
+ fprintf(outfile,"SWAP (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ return ;
+ case GETHBIT:
+ fprintf(outfile,"GETHBIT (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ return ;
+ case GETABIT:
+ fprintf(outfile,"GETABIT (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ case GETBYTE:
+ fprintf(outfile,"GETBYTE (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ case GETWORD:
+ fprintf(outfile,"GETWORD (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ case LEFT_OP:
+ fprintf(outfile,"LEFT_SHIFT (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ case RIGHT_OP:
+ fprintf(outfile,"RIGHT_SHIFT (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* casting */
+ /*----------------------------*/
+ case CAST: /* change the type */
+ fprintf(outfile,"CAST (%p) from type (",tree);
+ printTypeChain(tree->right->ftype,outfile);
+ fprintf(outfile,") to type (");
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->right,outfile,indent+2);
+ return ;
- /* if there are any statics then do them */
- if (staticAutos) {
- codeOutFile = statsg->oFile;
- eBBlockFromiCode (iCodeFromAst (decorateType(resolveSymbols(staticAutos))));
- staticAutos = NULL;
- }
+ case AND_OP:
+ fprintf(outfile,"ANDAND (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ case OR_OP:
+ fprintf(outfile,"OROR (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
- skipall:
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* comparison operators */
+ /*----------------------------*/
+ case '>':
+ fprintf(outfile,"GT(>) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ case '<':
+ fprintf(outfile,"LT(<) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ case LE_OP:
+ fprintf(outfile,"LE(<=) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ case GE_OP:
+ fprintf(outfile,"GE(>=) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ case EQ_OP:
+ fprintf(outfile,"EQ(==) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ case NE_OP:
+ fprintf(outfile,"NE(!=) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* sizeof */
+ /*----------------------------*/
+ case SIZEOF: /* evaluate wihout code generation */
+ fprintf(outfile,"SIZEOF %d\n",(getSize (tree->right->ftype)));
+ return ;
- /* dealloc the block variables */
- processBlockVars(body, &stack,DEALLOCATE);
- /* deallocate paramaters */
- deallocParms(name->args);
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* conditional operator '?' */
+ /*----------------------------*/
+ case '?':
+ fprintf(outfile,"QUEST(?) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
+
+ case ':':
+ fprintf(outfile,"COLON(:) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return ;
- if (IS_RENT(fetype))
- reentrant-- ;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* assignment operators */
+ /*----------------------------*/
+ case MUL_ASSIGN:
+ fprintf(outfile,"MULASS(*=) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
+ case DIV_ASSIGN:
+ fprintf(outfile,"DIVASS(/=) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
+ case AND_ASSIGN:
+ fprintf(outfile,"ANDASS(&=) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
+ case OR_ASSIGN:
+ fprintf(outfile,"ORASS(|=) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
+ case XOR_ASSIGN:
+ fprintf(outfile,"XORASS(^=) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
+ case RIGHT_ASSIGN:
+ fprintf(outfile,"RSHFTASS(>>=) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
+ case LEFT_ASSIGN:
+ fprintf(outfile,"LSHFTASS(<<=) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* -= operator */
+ /*----------------------------*/
+ case SUB_ASSIGN:
+ fprintf(outfile,"SUBASS(-=) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* += operator */
+ /*----------------------------*/
+ case ADD_ASSIGN:
+ fprintf(outfile,"ADDASS(+=) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* straight assignemnt */
+ /*----------------------------*/
+ case '=':
+ fprintf(outfile,"ASSIGN(=) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* comma operator */
+ /*----------------------------*/
+ case ',':
+ fprintf(outfile,"COMMA(,) (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* function call */
+ /*----------------------------*/
+ case CALL:
+ case PCALL:
+ fprintf(outfile,"CALL (%p) type (",tree);
+ printTypeChain(tree->ftype,outfile);
+ fprintf(outfile,")\n");
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent+2);
+ return;
+ case PARAM:
+ fprintf(outfile,"PARMS\n");
+ ast_print(tree->left,outfile,indent+2);
+ if (tree->right /*&& !IS_AST_PARAM(tree->right)*/) {
+ ast_print(tree->right,outfile,indent+2);
+ }
+ return ;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* return statement */
+ /*----------------------------*/
+ case RETURN:
+ fprintf(outfile,"RETURN (%p) type (",tree);
+ if (tree->right) {
+ printTypeChain(tree->right->ftype,outfile);
+ }
+ fprintf(outfile,")\n");
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* label statement */
+ /*----------------------------*/
+ case LABEL :
+ fprintf(outfile,"LABEL (%p)\n",tree);
+ ast_print(tree->left,outfile,indent+2);
+ ast_print(tree->right,outfile,indent);
+ return;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* switch statement */
+ /*----------------------------*/
+ case SWITCH:
+ {
+ value *val;
+ fprintf(outfile,"SWITCH (%p) ",tree);
+ ast_print(tree->left,outfile,0);
+ for (val = tree->values.switchVals.swVals; val ; val = val->next) {
+ INDENT(indent+2,outfile);
+ fprintf(outfile,"CASE 0x%x GOTO _case_%d_%d\n",
+ (int) ulFromVal(val),
+ tree->values.switchVals.swNum,
+ (int) ulFromVal(val));
+ }
+ ast_print(tree->right,outfile,indent);
+ }
+ return ;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* ifx Statement */
+ /*----------------------------*/
+ case IFX:
+ fprintf(outfile,"IF (%p) \n",tree);
+ ast_print(tree->left,outfile,indent+2);
+ if (tree->trueLabel) {
+ INDENT(indent+2,outfile);
+ fprintf(outfile,"NE(!=) 0 goto %s\n",tree->trueLabel->name);
+ }
+ if (tree->falseLabel) {
+ INDENT(indent+2,outfile);
+ fprintf(outfile,"EQ(==) 0 goto %s\n",tree->falseLabel->name);
+ }
+ ast_print(tree->right,outfile,indent+2);
+ return ;
+ /*----------------------------*/
+ /* goto Statement */
+ /*----------------------------*/
+ case GOTO:
+ fprintf(outfile,"GOTO (%p) \n",tree);
+ ast_print(tree->left,outfile,indent+2);
+ fprintf(outfile,"\n");
+ return ;
+ /*------------------------------------------------------------------*/
+ /*----------------------------*/
+ /* for Statement */
+ /*----------------------------*/
+ case FOR:
+ fprintf(outfile,"FOR (%p) \n",tree);
+ if (AST_FOR( tree, initExpr)) {
+ INDENT(indent+2,outfile);
+ fprintf(outfile,"INIT EXPR ");
+ ast_print(AST_FOR(tree, initExpr),outfile,indent+2);
+ }
+ if (AST_FOR( tree, condExpr)) {
+ INDENT(indent+2,outfile);
+ fprintf(outfile,"COND EXPR ");
+ ast_print(AST_FOR(tree, condExpr),outfile,indent+2);
+ }
+ if (AST_FOR( tree, loopExpr)) {
+ INDENT(indent+2,outfile);
+ fprintf(outfile,"LOOP EXPR ");
+ ast_print(AST_FOR(tree, loopExpr),outfile,indent+2);
+ }
+ fprintf(outfile,"FOR LOOP BODY \n");
+ ast_print(tree->left,outfile,indent+2);
+ return ;
+ case CRITICAL:
+ fprintf(outfile,"CRITICAL (%p) \n",tree);
+ ast_print(tree->left,outfile,indent+2);
+ default:
+ return ;
+ }
+}
- /* we are done freeup memory & cleanup */
- noLineno-- ;
- labelKey = 1 ;
- name->key = 0;
- name->fbody = 1;
- addSet(&operKeyReset,name);
- applyToSet(operKeyReset,resetParmKey);
+void PA(ast *t)
+{
+ ast_print(t,stdout,0);
+}
- if (options.debug && !options.nodebug)
- cdbStructBlock(1,cdbFile);
+/*-----------------------------------------------------------------*/
+/* astErrors : returns non-zero if errors present in tree */
+/*-----------------------------------------------------------------*/
+int astErrors(ast *t)
+{
+ int errors=0;
- cleanUpLevel(LabelTab,0);
- cleanUpBlock(StructTab,1);
- cleanUpBlock(TypedefTab,1);
+ if (t)
+ {
+ if (t->isError)
+ errors++;
- xstack->syms = NULL;
- istack->syms = NULL;
- return NULL ;
-}
+ if (t->type == EX_VALUE
+ && t->opval.val->sym
+ && t->opval.val->sym->undefined)
+ errors++;
+ errors += astErrors(t->left);
+ errors += astErrors(t->right);
+ }
+ return errors;
+}
projects / fw / sdcc / blobdiff