1 /*-------------------------------------------------------------------------
3 SDCCicode.h - intermediate code generation etc.
4 Written By - Sandeep Dutta . sandeep.dutta@usa.net (1998)
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 In other words, you are welcome to use, share and improve this program.
21 You are forbidden to forbid anyone else to use, share and improve
22 what you give them. Help stamp out software-hoarding!
23 -------------------------------------------------------------------------*/
30 extern symbol *returnLabel;
31 extern symbol *entryLabel;
33 extern int operandKey;
51 #define IS_SYMOP(op) (op && op->type == SYMBOL)
52 #define IS_VALOP(op) (op && op->type == VALUE)
53 #define IS_TYPOP(op) (op && op->type == TYPE)
55 #define ADDTOCHAIN(x) addSetHead(&iCodeChain,x)
57 #define LRFTYPE sym_link *ltype = operandType(left), \
58 *rtype = operandType(right) ;
59 #define LRETYPE sym_link *letype= getSpec(ltype) , \
60 *retype= getSpec(rtype);
61 #define LRTYPE LRFTYPE LRETYPE
62 #define IS_ITEMP(op) (IS_SYMOP(op) && op->operand.symOperand->isitmp == 1)
63 #define IS_PARM(op) (IS_SYMOP(op) && op->operand.symOperand->_isparm)
64 #define IS_ITEMPLBL(op) (IS_ITEMP(op) && op->operand.symOperand->isilbl == 1)
65 #define IS_OP_VOLATILE(op) (IS_SYMOP(op) && op->isvolatile)
66 #define IS_OP_LITERAL(op) (op && op->isLiteral)
67 #define IS_OP_GLOBAL(op) (IS_SYMOP(op) && op->isGlobal)
68 #define IS_OP_POINTER(op) (IS_SYMOP(op) && op->isPtr)
69 #define IS_OP_PARM(op) (IS_SYMOP(op) && op->isParm)
70 #define OP_ISLIVE_FCALL(op) (IS_ITEMP(op) && OP_SYMBOL(op)->isLiveFcall)
71 #define SYM_SPIL_LOC(sym) sym->usl.spillLoc
73 /* typedef for operand */
74 typedef struct operand
76 OPTYPE type; /* type of operand */
77 unsigned int isaddr:1; /* is an address */
78 unsigned int aggr2ptr:2; /* 1: must change aggregate to pointer to aggregate */
79 /* 2: aggregate has been changed to pointer to aggregate */
80 unsigned int isvolatile:1; /* is a volatile operand */
81 unsigned int isGlobal:1; /* is a global operand */
82 unsigned int isPtr:1; /* is assigned a pointer */
83 unsigned int isGptr:1; /* is a generic pointer */
84 unsigned int isParm:1; /* is a parameter */
85 unsigned int isLiteral:1; /* operand is literal */
90 struct symbol *symOperand; /* operand is of type symbol */
91 struct value *valOperand; /* operand is of type value */
92 struct sym_link *typeOperand; /* operand is of type typechain */
96 bitVect *usesDefs; /* which definitions are used by this */
97 struct asmop *aop; /* asm op for this operand */
101 extern operand *validateOpType(operand *op,
108 #define OP_SYMBOL(op) validateOpType(op, "OP_SYMBOL", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand
109 #define OP_VALUE(op) validateOpType(op, "OP_VALUE", #op, VALUE, __FILE__, __LINE__)->operand.valOperand
110 #define OP_SYM_TYPE(op) validateOpType(op, "OP_SYM_TYPE", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->type
111 #define OP_SYM_ETYPE(op) validateOpType(op, "OP_SYM_ETYPE", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->etype
112 #define SPIL_LOC(op) validateOpType(op, "SPIL_LOC", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->usl.spillLoc
113 #define OP_LIVEFROM(op) validateOpType(op, "OP_LIVEFROM", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->liveFrom
114 #define OP_LIVETO(op) validateOpType(op, "OP_LIVETO", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->liveTo
115 #define OP_REQV(op) validateOpType(op, "OP_REQV", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->reqv
117 /* definition for intermediate code */
118 #define IC_RESULT(x) (x)->ulrrcnd.lrr.result
119 #define IC_LEFT(x) (x)->ulrrcnd.lrr.left
120 #define IC_RIGHT(x) (x)->ulrrcnd.lrr.right
121 #define IC_COND(x) (x)->ulrrcnd.cnd.condition
122 #define IC_TRUE(x) (x)->ulrrcnd.cnd.trueLabel
123 #define IC_FALSE(x) (x)->ulrrcnd.cnd.falseLabel
124 #define IC_LABEL(x) (x)->label
125 #define IC_JTCOND(x) (x)->ulrrcnd.jmpTab.condition
126 #define IC_JTLABELS(x) (x)->ulrrcnd.jmpTab.labels
127 #define IC_INLINE(x) (x)->inlineAsm
128 #define IC_ARRAYILIST(x) (x)->arrayInitList
132 unsigned int op; /* operation defined */
133 int key; /* running key for this iCode */
134 int seq; /* sequence number within routine */
135 int seqPoint; /* sequence point */
136 short depth; /* loop depth of this iCode */
137 short level; /* scope level */
138 short block; /* sequential block number */
139 unsigned nosupdate:1; /* don't update spillocation with this */
140 unsigned generated:1; /* code generated for this one */
141 unsigned parmPush:1; /* parameter push Vs spill push */
142 unsigned supportRtn:1; /* will cause a call to a support routine */
143 unsigned regsSaved:1; /* registers have been saved */
144 unsigned bankSaved:1; /* register bank has been saved */
145 unsigned builtinSEND:1; /* SEND for parameter of builtin function */
147 struct iCode *next; /* next in chain */
148 struct iCode *prev; /* previous in chain */
149 set *movedFrom; /* if this iCode gets moved to another block */
150 bitVect *rlive; /* ranges that are live at this point */
151 int defKey; /* key for the operand being defined */
152 bitVect *uses; /* vector of key of used symbols */
153 bitVect *rUsed; /* registers used by this instruction */
154 bitVect *rMask; /* registers in use during this instruction */
159 operand *left; /* left if any */
160 operand *right; /* right if any */
161 operand *result; /* result of this op */
167 operand *condition; /* if this is a conditional */
168 symbol *trueLabel; /* true for conditional */
169 symbol *falseLabel; /* false for conditional */
175 operand *condition; /* condition for the jump */
176 set *labels; /* ordered set of labels */
183 symbol *label; /* for a goto statement */
185 char *inlineAsm; /* pointer to inline assembler code */
186 literalList *arrayInitList; /* point to array initializer list. */
188 int lineno; /* file & lineno for debug information */
191 int parmBytes; /* if call/pcall, count of parameter bytes
193 int argreg; /* argument regno for SEND/RECEIVE */
194 int eBBlockNum; /* belongs to which eBBlock */
195 char riu; /* after ralloc, the registers in use */
196 struct ast * tree; /* ast node for this iCode (if not NULL) */
200 /* various functions associated to iCode */
201 typedef struct icodeFuncTable
205 void (*iCodePrint) (struct dbuf_s *, iCode *, char *);
206 iCode *(*iCodeCopy) (iCode *);
211 #define SKIP_IC2(x) (x->op == GOTO || \
213 x->op == FUNCTION || \
214 x->op == INLINEASM || \
215 x->op == ENDFUNCTION )
217 #define SKIP_IC1(x) (x->op == CALL || \
220 #define SKIP_IC(x) (x->op == PCALL || \
223 x->op == JUMPTABLE || \
224 x->op == RECEIVE || \
225 x->op == ARRAYINIT || \
227 x->op == CRITICAL || \
228 x->op == ENDCRITICAL || \
231 #define SKIP_IC3(x) (SKIP_IC2(x) || \
234 #define IS_CONDITIONAL(x) (x->op == EQ_OP || \
241 #define IS_TRUE_SYMOP(op) (op && IS_SYMOP(op) && !IS_ITEMP(op))
243 #define POINTER_SET(ic) ( ic && ic->op == '=' \
244 && (IS_ITEMP(IC_RESULT(ic)) || IS_OP_LITERAL(IC_RESULT(ic)))\
245 && IC_RESULT(ic)->isaddr )
247 #define POINTER_GET(ic) ( ic && ic->op == GET_VALUE_AT_ADDRESS \
248 && (IS_ITEMP(IC_LEFT(ic)) || IS_OP_LITERAL(IC_LEFT(ic)))\
249 && IC_LEFT(ic)->isaddr )
251 #define IS_ARITHMETIC_OP(x) (x && (x->op == '+' || \
256 #define IS_BITWISE_OP(x) (x && (x->op == BITWISEAND || \
260 #define IS_ASSOCIATIVE(x) (x && (x->op == EQ_OP || \
264 x->op == BITWISEAND || \
268 #define ASSIGNMENT(ic) ( ic && ic->op == '=')
270 #define ASSIGN_SYM_TO_ITEMP(ic) (ic && ic->op == '=' && \
271 IS_TRUE_SYMOP(IC_RIGHT(ic)) && \
272 IS_ITEMP(IC_RESULT(ic)))
274 #define ASSIGN_ITEMP_TO_SYM(ic) (ic && ic->op == '=' && \
275 IS_TRUE_SYMOP(IC_RESULT(ic)) && \
276 IS_ITEMP(IC_RIGHT(ic)))
278 #define ASSIGN_ITEMP_TO_ITEMP(ic) (ic && ic->op == '=' &&\
280 IS_ITEMP(IC_RIGHT(ic)) &&\
281 IS_ITEMP(IC_RESULT(ic)))
283 #define ADD_SUBTRACT_ITEMP(ic) (ic && (ic->op == '+' || ic->op == '-') && \
284 IS_ITEMP(IC_RESULT(ic)) && \
285 ( ( IS_ITEMP(IC_LEFT(ic)) ) || ( IS_SYMOP(IC_LEFT(ic)) ) ) && \
286 IS_OP_LITERAL(IC_RIGHT(ic)))
288 #define ASSIGNMENT_TO_SELF(ic) (!POINTER_SET(ic) && !POINTER_GET(ic) && \
289 ic->op == '=' && IC_RESULT(ic)->key == IC_RIGHT(ic)->key )
291 #define IS_CAST_ICODE(ic) (ic && ic->op == CAST)
292 #define SET_ISADDR(op,v) {op = operandFromOperand(op); op->isaddr = v;}
293 #define SET_RESULT_RIGHT(ic) {SET_ISADDR(IC_RIGHT(ic),0); SET_ISADDR(IC_RESULT(ic),0);}
294 #define IS_ASSIGN_ICODE(ic) (ASSIGNMENT(ic) && !POINTER_SET(ic))
296 #define OP_DEFS(op) validateOpType(op, "OP_DEFS", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->defs
297 #define OP_USES(op) validateOpType(op, "OP_USES", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->uses
298 /*-----------------------------------------------------------------*/
299 /* forward references for functions */
300 /*-----------------------------------------------------------------*/
301 iCode *reverseiCChain ();
302 bool isOperandOnStack (operand *);
303 int isOperandVolatile (operand *, bool);
304 int isOperandGlobal (operand *);
305 void printiCChain (iCode *, FILE *);
306 operand *ast2iCode (ast *,int);
307 operand *geniCodePtrPtrSubtract (operand *, operand *);
309 iCode *iCodeFromAst (ast *);
310 int isiCodeEqual (iCode *, iCode *);
311 int isOperandEqual (operand *, operand *);
312 iCodeTable *getTableEntry (int);
313 int isOperandLiteral (operand *);
314 operand *operandOperation (operand *, operand *, int, sym_link *);
315 double operandLitValue (operand *);
316 operand *operandFromLit (double);
317 operand *operandFromOperand (operand *);
318 int isParameterToCall (value *, operand *);
319 iCode *newiCodeLabelGoto (int, symbol *);
320 symbol *newiTemp (char *);
321 symbol *newiTempLabel (char *);
322 #define LOOPEXITLBL "loopExitLbl"
323 symbol *newiTempLoopHeaderLabel (bool);
324 iCode *newiCode (int, operand *, operand *);
325 sym_link *operandType (operand *);
326 unsigned int operandSize (operand *);
327 operand *operandFromValue (value *);
328 operand *operandFromSymbol (symbol *);
329 operand *operandFromLink (sym_link *);
330 sym_link *aggrToPtr (sym_link *, bool);
331 int aggrToPtrDclType (sym_link *, bool);
332 int piCode (void *, FILE *);
333 int dbuf_printOperand (operand *, struct dbuf_s *);
334 int printOperand (operand *, FILE *);
335 void setOperandType (operand *, sym_link *);
336 bool isOperandInFarSpace (operand *);
337 bool isOperandInPagedSpace (operand *);
338 bool isOperandInDirSpace (operand *);
339 bool isOperandInCodeSpace (operand *);
340 operand *opFromOpWithDU (operand *, bitVect *, bitVect *);
341 iCode *copyiCode (iCode *);
342 operand *newiTempOperand (sym_link *, char);
343 operand *newiTempFromOp (operand *);
344 iCode *getBuiltinParms (iCode *,int *, operand **);
345 int isiCodeInFunctionCall (iCode *);
346 /*-----------------------------------------------------------------*/
347 /* declaration of exported variables */
348 /*-----------------------------------------------------------------*/
349 extern char *filename;