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 ADDTOCHAIN(x) addSetHead(&iCodeChain,x)
55 #define LRFTYPE sym_link *ltype = operandType(left), \
56 *rtype = operandType(right) ;
57 #define LRETYPE sym_link *letype= getSpec(ltype) , \
58 *retype= getSpec(rtype);
59 #define LRTYPE LRFTYPE LRETYPE
60 #define IS_ITEMP(op) (IS_SYMOP(op) && op->operand.symOperand->isitmp == 1)
61 #define IS_PARM(op) (IS_SYMOP(op) && op->operand.symOperand->_isparm)
62 #define IS_ITEMPLBL(op) (IS_ITEMP(op) && op->operand.symOperand->isilbl == 1);
63 #define IS_OP_VOLATILE(op) (IS_SYMOP(op) && op->isvolatile)
64 #define IS_OP_LITERAL(op) (op && op->isLiteral)
65 #define IS_OP_GLOBAL(op) (IS_SYMOP(op) && op->isGlobal)
66 #define IS_OP_POINTER(op) (IS_SYMOP(op) && op->isPtr)
67 #define IS_OP_PARM(op) (IS_SYMOP(op) && op->isParm)
68 #define OP_SYMBOL(op) op->operand.symOperand
69 #define OP_SYM_TYPE(op) op->operand.symOperand->type
70 #define OP_SYM_ETYPE(op) op->operand.symOperand->etype
71 #define OP_VALUE(op) op->operand.valOperand
72 #define SPIL_LOC(op) op->operand.symOperand->usl.spillLoc
73 #define OP_LIVEFROM(op) op->operand.symOperand->liveFrom
74 #define OP_LIVETO(op) op->operand.symOperand->liveTo
75 #define OP_REQV(op) op->operand.symOperand->reqv
76 #define OP_ISLIVE_FCALL(op) (IS_ITEMP(op) && OP_SYMBOL(op)->isLiveFcall)
77 #define SYM_SPIL_LOC(sym) sym->usl.spillLoc
79 /* typedef for operand */
80 typedef struct operand
82 OPTYPE type; /* type of operand */
83 unsigned int isaddr:1; /* is an address */
84 unsigned int isvolatile:1; /* is a volatile operand */
85 unsigned int isGlobal:1; /* is a global operand */
86 unsigned int isPtr:1; /* is assigned a pointer */
87 unsigned int isGptr:1; /* is a generic pointer */
88 unsigned int isParm:1; /* is a parameter */
89 unsigned int isLiteral:1; /* operand is literal */
94 struct symbol *symOperand; /* operand is of type symbol */
95 struct value *valOperand; /* operand is of type value */
96 struct sym_link *typeOperand; /* operand is of type typechain */
100 bitVect *usesDefs; /* which definitions are used by this */
101 struct asmop *aop; /* asm op for this operand */
105 /* definition for intermediate code */
106 #define IC_RESULT(x) (x)->ulrrcnd.lrr.result
107 #define IC_LEFT(x) (x)->ulrrcnd.lrr.left
108 #define IC_RIGHT(x) (x)->ulrrcnd.lrr.right
109 #define IC_COND(x) (x)->ulrrcnd.cnd.condition
110 #define IC_TRUE(x) (x)->ulrrcnd.cnd.trueLabel
111 #define IC_FALSE(x) (x)->ulrrcnd.cnd.falseLabel
112 #define IC_LABEL(x) (x)->argLabel.label
113 // jwk #define IC_ARGS(x) (x)->argLabel.args
114 #define IC_JTCOND(x) (x)->ulrrcnd.jmpTab.condition
115 #define IC_JTLABELS(x) (x)->ulrrcnd.jmpTab.labels
116 #define IC_INLINE(x) (x)->inlineAsm
117 #define IC_ARRAYILIST(x) (x)->arrayInitList
121 unsigned int op; /* operation defined */
122 int key; /* running key for this iCode */
123 int seq; /* sequence number within routine */
124 short depth; /* loop depth of this iCode */
125 short level; /* scope level */
126 short block; /* sequential block number */
127 unsigned nosupdate:1; /* don't update spillocation with this */
128 unsigned generated:1; /* code generated for this one */
129 unsigned parmPush:1; /* parameter push Vs spill push */
130 unsigned supportRtn:1; /* will cause a call to a support routine */
131 unsigned regsSaved:1; /* registers have been saved */
132 unsigned bankSaved:1; /* register bank has been saved */
133 unsigned builtinSEND:1; /* SEND for parameter of builtin function */
135 struct iCode *next; /* next in chain */
136 struct iCode *prev; /* previous in chain */
137 set *movedFrom; /* if this iCode gets moved to another block */
138 bitVect *rlive; /* ranges that are live at this point */
139 int defKey; /* key for the operand being defined */
140 bitVect *uses; /* vector of key of used symbols */
141 bitVect *rUsed; /* registers used by this instruction */
142 bitVect *rMask; /* registers in use during this instruction */
147 operand *left; /* left if any */
148 operand *right; /* right if any */
149 operand *result; /* result of this op */
155 operand *condition; /* if this is a conditional */
156 symbol *trueLabel; /* true for conditional */
157 symbol *falseLabel; /* false for conditional */
163 operand *condition; /* condition for the jump */
164 set *labels; /* ordered set of labels */
173 symbol *label; /* for a goto statement */
174 // jwk value *args; /* for a function */
178 char *inlineAsm; /* pointer to inline assembler code */
179 literalList *arrayInitList; /* point to array initializer list. */
181 int lineno; /* file & lineno for debug information */
184 int parmBytes; /* if call/pcall, count of parameter bytes
186 int eBBlockNum; /* belongs to which eBBlock */
190 /* various functions associated to iCode */
191 typedef struct icodeFuncTable
195 void (*iCodePrint) (FILE *, iCode *, char *);
196 iCode *(*iCodeCopy) (iCode *);
201 #define SKIP_IC2(x) (x->op == GOTO || \
203 x->op == FUNCTION || \
204 x->op == INLINEASM || \
205 x->op == ENDFUNCTION )
207 #define SKIP_IC1(x) (x->op == CALL || \
210 #define SKIP_IC(x) (x->op == PCALL || \
213 x->op == JUMPTABLE || \
214 x->op == RECEIVE || \
215 x->op == ARRAYINIT || \
219 #define SKIP_IC3(x) (SKIP_IC2(x) || \
222 #define IS_CONDITIONAL(x) (x->op == EQ_OP || \
229 #define IS_TRUE_SYMOP(op) (op && IS_SYMOP(op) && !IS_ITEMP(op))
231 #define POINTER_SET(ic) ( ic && ic->op == '=' \
232 && IS_ITEMP(IC_RESULT(ic)) \
233 && IC_RESULT(ic)->isaddr )
235 #define POINTER_GET(ic) ( ic && ic->op == GET_VALUE_AT_ADDRESS \
236 && (IS_ITEMP(IC_LEFT(ic)) || IS_OP_LITERAL(IC_LEFT(ic)))\
237 && IC_LEFT(ic)->isaddr )
239 #define IS_ARITHMETIC_OP(x) (x && (x->op == '+' || \
244 #define IS_BITWISE_OP(x) (x && (x->op == BITWISEAND || \
248 #define ASSIGNMENT(ic) ( ic && ic->op == '=')
250 #define ASSIGN_SYM_TO_ITEMP(ic) (ic && ic->op == '=' && \
251 IS_TRUE_SYMOP(IC_RIGHT(ic)) && \
252 IS_ITEMP(IC_RESULT(ic)))
254 #define ASSIGN_ITEMP_TO_SYM(ic) (ic && ic->op == '=' && \
255 IS_TRUE_SYMOP(IC_RESULT(ic)) && \
256 IS_ITEMP(IC_RIGHT(ic)))
258 #define ASSIGN_ITEMP_TO_ITEMP(ic) (ic && ic->op == '=' &&\
260 IS_ITEMP(IC_RIGHT(ic)) &&\
261 IS_ITEMP(IC_RESULT(ic)))
263 #define ADD_SUBTRACT_ITEMP(ic) (ic && (ic->op == '+' || ic->op == '-') && \
264 IS_ITEMP(IC_RESULT(ic)) && \
265 ( ( IS_ITEMP(IC_LEFT(ic)) ) || ( IS_SYMOP(IC_LEFT(ic)) ) ) && \
266 IS_OP_LITERAL(IC_RIGHT(ic)))
268 #define ASSIGNMENT_TO_SELF(ic) (!POINTER_SET(ic) && !POINTER_GET(ic) && \
269 ic->op == '=' && IC_RESULT(ic)->key == IC_RIGHT(ic)->key )
271 #define IS_CAST_ICODE(ic) (ic && ic->op == CAST)
272 #define SET_ISADDR(op,v) {op = operandFromOperand(op); op->isaddr = v;}
273 #define SET_RESULT_RIGHT(ic) {SET_ISADDR(IC_RIGHT(ic),0); SET_ISADDR(IC_RESULT(ic),0);}
274 #define IS_ASSIGN_ICODE(ic) (ASSIGNMENT(ic) && !POINTER_SET(ic))
276 #define OP_DEFS(op) op->operand.symOperand->defs
277 #define OP_USES(op) op->operand.symOperand->uses
278 /*-----------------------------------------------------------------*/
279 /* forward references for functions */
280 /*-----------------------------------------------------------------*/
281 iCode *reverseiCChain ();
282 bool isOperandOnStack (operand *);
283 int isOperandVolatile (operand *, bool);
284 int isOperandGlobal (operand *);
285 void printiCChain (iCode *, FILE *);
286 operand *ast2iCode (ast *,int);
287 operand *geniCodeCast (sym_link *, operand *, bool);
288 operand *geniCodePtrPtrSubtract (operand *, operand *);
290 iCode *iCodeFromAst (ast *);
291 int isiCodeEqual (iCode *, iCode *);
292 int isOperandEqual (operand *, operand *);
293 iCodeTable *getTableEntry (int);
294 int isOperandLiteral (operand *);
295 operand *operandOperation (operand *, operand *, int, sym_link *);
296 double operandLitValue (operand *);
297 operand *operandFromLit (double);
298 operand *operandFromOperand (operand *);
299 int isParameterToCall (value *, operand *);
300 iCode *newiCodeLabelGoto (int, symbol *);
301 symbol *newiTemp (char *);
302 symbol *newiTempLabel (char *);
303 symbol *newiTempPreheaderLabel ();
304 iCode *newiCode (int, operand *, operand *);
305 sym_link *operandType (operand *);
306 operand *operandFromValue (value *);
307 operand *operandFromSymbol (symbol *);
308 sym_link *aggrToPtr (sym_link *, bool);
309 int piCode (void *, FILE *);
310 int printOperand (operand *, FILE *);
311 void setOperandType (operand *, sym_link *);
312 bool isOperandInFarSpace (operand *);
313 operand *opFromOpWithDU (operand *, bitVect *, bitVect *);
314 iCode *copyiCode (iCode *);
315 operand *newiTempFromOp (operand *);
316 iCode *getBuiltinParms (iCode *,int *, operand **);
317 /*-----------------------------------------------------------------*/
318 /* declaration of exported variables */
319 /*-----------------------------------------------------------------*/
320 extern char *filename;