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 isvolatile:1; /* is a volatile operand */
79 unsigned int isGlobal:1; /* is a global operand */
80 unsigned int isPtr:1; /* is assigned a pointer */
81 unsigned int isGptr:1; /* is a generic pointer */
82 unsigned int isParm:1; /* is a parameter */
83 unsigned int isLiteral:1; /* operand is literal */
88 struct symbol *symOperand; /* operand is of type symbol */
89 struct value *valOperand; /* operand is of type value */
90 struct sym_link *typeOperand; /* operand is of type typechain */
94 bitVect *usesDefs; /* which definitions are used by this */
95 struct asmop *aop; /* asm op for this operand */
99 extern operand *validateOpType(operand *op,
106 #define OP_SYMBOL(op) validateOpType(op, "OP_SYMBOL", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand
107 #define OP_VALUE(op) validateOpType(op, "OP_VALUE", #op, VALUE, __FILE__, __LINE__)->operand.valOperand
108 #define OP_SYM_TYPE(op) validateOpType(op, "OP_SYM_TYPE", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->type
109 #define OP_SYM_ETYPE(op) validateOpType(op, "OP_SYM_ETYPE", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->etype
110 #define SPIL_LOC(op) validateOpType(op, "SPIL_LOC", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->usl.spillLoc
111 #define OP_LIVEFROM(op) validateOpType(op, "OP_LIVEFROM", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->liveFrom
112 #define OP_LIVETO(op) validateOpType(op, "OP_LIVETO", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->liveTo
113 #define OP_REQV(op) validateOpType(op, "OP_REQV", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->reqv
115 /* definition for intermediate code */
116 #define IC_RESULT(x) (x)->ulrrcnd.lrr.result
117 #define IC_LEFT(x) (x)->ulrrcnd.lrr.left
118 #define IC_RIGHT(x) (x)->ulrrcnd.lrr.right
119 #define IC_COND(x) (x)->ulrrcnd.cnd.condition
120 #define IC_TRUE(x) (x)->ulrrcnd.cnd.trueLabel
121 #define IC_FALSE(x) (x)->ulrrcnd.cnd.falseLabel
122 #define IC_LABEL(x) (x)->label
123 #define IC_JTCOND(x) (x)->ulrrcnd.jmpTab.condition
124 #define IC_JTLABELS(x) (x)->ulrrcnd.jmpTab.labels
125 #define IC_INLINE(x) (x)->inlineAsm
126 #define IC_ARRAYILIST(x) (x)->arrayInitList
130 unsigned int op; /* operation defined */
131 int key; /* running key for this iCode */
132 int seq; /* sequence number within routine */
133 int seqPoint; /* sequence point */
134 short depth; /* loop depth of this iCode */
135 short level; /* scope level */
136 short block; /* sequential block number */
137 unsigned nosupdate:1; /* don't update spillocation with this */
138 unsigned generated:1; /* code generated for this one */
139 unsigned parmPush:1; /* parameter push Vs spill push */
140 unsigned supportRtn:1; /* will cause a call to a support routine */
141 unsigned regsSaved:1; /* registers have been saved */
142 unsigned bankSaved:1; /* register bank has been saved */
143 unsigned builtinSEND:1; /* SEND for parameter of builtin function */
145 struct iCode *next; /* next in chain */
146 struct iCode *prev; /* previous in chain */
147 set *movedFrom; /* if this iCode gets moved to another block */
148 bitVect *rlive; /* ranges that are live at this point */
149 int defKey; /* key for the operand being defined */
150 bitVect *uses; /* vector of key of used symbols */
151 bitVect *rUsed; /* registers used by this instruction */
152 bitVect *rMask; /* registers in use during this instruction */
157 operand *left; /* left if any */
158 operand *right; /* right if any */
159 operand *result; /* result of this op */
165 operand *condition; /* if this is a conditional */
166 symbol *trueLabel; /* true for conditional */
167 symbol *falseLabel; /* false for conditional */
173 operand *condition; /* condition for the jump */
174 set *labels; /* ordered set of labels */
181 symbol *label; /* for a goto statement */
183 char *inlineAsm; /* pointer to inline assembler code */
184 literalList *arrayInitList; /* point to array initializer list. */
186 int lineno; /* file & lineno for debug information */
189 int parmBytes; /* if call/pcall, count of parameter bytes
191 int argreg; /* argument regno for SEND/RECEIVE */
192 int eBBlockNum; /* belongs to which eBBlock */
193 char riu; /* after ralloc, the registers in use */
194 struct ast * tree; /* ast node for this iCode (if not NULL) */
198 /* various functions associated to iCode */
199 typedef struct icodeFuncTable
203 void (*iCodePrint) (FILE *, iCode *, char *);
204 iCode *(*iCodeCopy) (iCode *);
209 #define SKIP_IC2(x) (x->op == GOTO || \
211 x->op == FUNCTION || \
212 x->op == INLINEASM || \
213 x->op == ENDFUNCTION )
215 #define SKIP_IC1(x) (x->op == CALL || \
218 #define SKIP_IC(x) (x->op == PCALL || \
221 x->op == JUMPTABLE || \
222 x->op == RECEIVE || \
223 x->op == ARRAYINIT || \
227 #define SKIP_IC3(x) (SKIP_IC2(x) || \
230 #define IS_CONDITIONAL(x) (x->op == EQ_OP || \
237 #define IS_TRUE_SYMOP(op) (op && IS_SYMOP(op) && !IS_ITEMP(op))
239 #define POINTER_SET(ic) ( ic && ic->op == '=' \
240 && IS_ITEMP(IC_RESULT(ic)) \
241 && IC_RESULT(ic)->isaddr )
243 #define POINTER_GET(ic) ( ic && ic->op == GET_VALUE_AT_ADDRESS \
244 && (IS_ITEMP(IC_LEFT(ic)) || IS_OP_LITERAL(IC_LEFT(ic)))\
245 && IC_LEFT(ic)->isaddr )
247 #define IS_ARITHMETIC_OP(x) (x && (x->op == '+' || \
252 #define IS_BITWISE_OP(x) (x && (x->op == BITWISEAND || \
256 #define ASSIGNMENT(ic) ( ic && ic->op == '=')
258 #define ASSIGN_SYM_TO_ITEMP(ic) (ic && ic->op == '=' && \
259 IS_TRUE_SYMOP(IC_RIGHT(ic)) && \
260 IS_ITEMP(IC_RESULT(ic)))
262 #define ASSIGN_ITEMP_TO_SYM(ic) (ic && ic->op == '=' && \
263 IS_TRUE_SYMOP(IC_RESULT(ic)) && \
264 IS_ITEMP(IC_RIGHT(ic)))
266 #define ASSIGN_ITEMP_TO_ITEMP(ic) (ic && ic->op == '=' &&\
268 IS_ITEMP(IC_RIGHT(ic)) &&\
269 IS_ITEMP(IC_RESULT(ic)))
271 #define ADD_SUBTRACT_ITEMP(ic) (ic && (ic->op == '+' || ic->op == '-') && \
272 IS_ITEMP(IC_RESULT(ic)) && \
273 ( ( IS_ITEMP(IC_LEFT(ic)) ) || ( IS_SYMOP(IC_LEFT(ic)) ) ) && \
274 IS_OP_LITERAL(IC_RIGHT(ic)))
276 #define ASSIGNMENT_TO_SELF(ic) (!POINTER_SET(ic) && !POINTER_GET(ic) && \
277 ic->op == '=' && IC_RESULT(ic)->key == IC_RIGHT(ic)->key )
279 #define IS_CAST_ICODE(ic) (ic && ic->op == CAST)
280 #define SET_ISADDR(op,v) {op = operandFromOperand(op); op->isaddr = v;}
281 #define SET_RESULT_RIGHT(ic) {SET_ISADDR(IC_RIGHT(ic),0); SET_ISADDR(IC_RESULT(ic),0);}
282 #define IS_ASSIGN_ICODE(ic) (ASSIGNMENT(ic) && !POINTER_SET(ic))
284 #define OP_DEFS(op) validateOpType(op, "OP_DEFS", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->defs
285 #define OP_USES(op) validateOpType(op, "OP_USES", #op, SYMBOL, __FILE__, __LINE__)->operand.symOperand->uses
286 /*-----------------------------------------------------------------*/
287 /* forward references for functions */
288 /*-----------------------------------------------------------------*/
289 iCode *reverseiCChain ();
290 bool isOperandOnStack (operand *);
291 int isOperandVolatile (operand *, bool);
292 int isOperandGlobal (operand *);
293 void printiCChain (iCode *, FILE *);
294 operand *ast2iCode (ast *,int);
295 operand *geniCodePtrPtrSubtract (operand *, operand *);
297 iCode *iCodeFromAst (ast *);
298 int isiCodeEqual (iCode *, iCode *);
299 int isOperandEqual (operand *, operand *);
300 iCodeTable *getTableEntry (int);
301 int isOperandLiteral (operand *);
302 operand *operandOperation (operand *, operand *, int, sym_link *);
303 double operandLitValue (operand *);
304 operand *operandFromLit (double);
305 operand *operandFromOperand (operand *);
306 int isParameterToCall (value *, operand *);
307 iCode *newiCodeLabelGoto (int, symbol *);
308 symbol *newiTemp (char *);
309 symbol *newiTempLabel (char *);
310 symbol *newiTempPreheaderLabel ();
311 iCode *newiCode (int, operand *, operand *);
312 sym_link *operandType (operand *);
313 operand *operandFromValue (value *);
314 operand *operandFromSymbol (symbol *);
315 operand *operandFromLink (sym_link *);
316 sym_link *aggrToPtr (sym_link *, bool);
317 int aggrToPtrDclType (sym_link *, bool);
318 int piCode (void *, FILE *);
319 int printOperand (operand *, FILE *);
320 void setOperandType (operand *, sym_link *);
321 bool isOperandInFarSpace (operand *);
322 bool isOperandInDirSpace (operand *);
323 bool isOperandInCodeSpace (operand *);
324 operand *opFromOpWithDU (operand *, bitVect *, bitVect *);
325 iCode *copyiCode (iCode *);
326 operand *newiTempFromOp (operand *);
327 iCode *getBuiltinParms (iCode *,int *, operand **);
328 /*-----------------------------------------------------------------*/
329 /* declaration of exported variables */
330 /*-----------------------------------------------------------------*/
331 extern char *filename;