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 ;
47 #define IS_SYMOP(op) (op && op->type == SYMBOL)
48 #define ADDTOCHAIN(x) addSetHead(&iCodeChain,x)
50 #define LRFTYPE link *ltype = operandType(left), \
51 *rtype = operandType(right) ;
52 #define LRETYPE link *letype= getSpec(ltype) , \
53 *retype= getSpec(rtype);
54 #define LRTYPE LRFTYPE LRETYPE
55 #define IS_ITEMP(op) (IS_SYMOP(op) && op->operand.symOperand->isitmp == 1)
56 #define IS_PARM(op) (IS_SYMOP(op) && op->operand.symOperand->_isparm)
57 #define IS_ITEMPLBL(op) (IS_ITEMP(op) && op->operand.symOperand->isilbl == 1);
58 #define IS_OP_VOLATILE(op) (IS_SYMOP(op) && op->isvolatile)
59 #define IS_OP_LITERAL(op) (op && op->isLiteral)
60 #define IS_OP_GLOBAL(op) (IS_SYMOP(op) && op->isGlobal)
61 #define IS_OP_POINTER(op) (IS_SYMOP(op) && op->isPtr)
62 #define IS_OP_PARM(op) (IS_SYMOP(op) && op->isParm)
63 #define OP_SYMBOL(op) op->operand.symOperand
64 #define OP_SYM_TYPE(op) op->operand.symOperand->type
65 #define OP_SYM_ETYPE(op) op->operand.symOperand->etype
66 #define SPIL_LOC(op) op->operand.symOperand->usl.spillLoc
67 #define OP_LIVEFROM(op) op->operand.symOperand->liveFrom
68 #define OP_LIVETO(op) op->operand.symOperand->liveTo
69 #define OP_REQV(op) op->operand.symOperand->reqv
71 /* typedef for operand */
72 typedef struct operand {
73 OPTYPE type; /* type of operand */
74 unsigned int isaddr : 1; /* is an address */
75 unsigned int isvolatile: 1; /* is a volatile operand */
76 unsigned int isGlobal :1 ; /* is a global operand */
77 unsigned int isPtr :1 ; /* is assigned a pointer */
78 unsigned int isGptr :1 ; /* is a generic pointer */
79 unsigned int isParm :1 ; /* is a parameter */
80 unsigned int isLiteral:1 ; /* operand is literal */
81 unsigned int noSpilLoc:1 ; /* cannot be assigned a spil location */
86 struct symbol *symOperand ; /* operand is of type symbol */
87 struct value *valOperand ; /* operand is of type value */
88 struct link *typeOperand; /* operand is of type typechain */
91 bitVect *usesDefs; /* which definitions are used by this */
92 struct asmop *aop ; /* asm op for this operand */
95 /* definition for intermediate code */
96 #define IC_RESULT(x) x->ulrrcnd.lrr.result
97 #define IC_LEFT(x) x->ulrrcnd.lrr.left
98 #define IC_RIGHT(x) x->ulrrcnd.lrr.right
99 #define IC_COND(x) x->ulrrcnd.cnd.condition
100 #define IC_TRUE(x) x->ulrrcnd.cnd.trueLabel
101 #define IC_FALSE(x) x->ulrrcnd.cnd.falseLabel
102 #define IC_LABEL(x) x->argLabel.label
103 #define IC_ARGS(x) x->argLabel.args
104 #define IC_JTCOND(x) x->ulrrcnd.jmpTab.condition
105 #define IC_JTLABELS(x) x->ulrrcnd.jmpTab.labels
106 #define IC_INLINE(x) x->inlineAsm
110 unsigned int op ; /* operation defined */
111 int key ; /* running key for this iCode */
112 int seq ; /* sequence number within routine */
113 short depth ; /* loop depth of this iCode */
114 short level ; /* scope level */
115 short block ; /* sequential block number */
116 unsigned nosupdate:1; /* don't update spillocation with this */
117 unsigned generated:1; /* code generated for this one */
118 unsigned parmPush :1; /* parameter push Vs spill push */
119 unsigned supportRtn:1; /* will cause a call to a support routine */
120 unsigned regsSaved:1 ; /* registers have been saved */
121 unsigned bankSaved:1 ; /* register bank has been saved */
123 struct iCode *next ; /* next in chain */
124 struct iCode *prev ; /* previous in chain */
125 set *movedFrom; /* if this iCode gets moved to another block */
126 bitVect *rlive ; /* ranges that are live at this point */
127 int defKey ; /* key for the operand being defined */
128 bitVect *uses ; /* vector of key of used symbols */
129 bitVect *rUsed ; /* registers used by this instruction */
130 bitVect *rMask ; /* registers in use during this instruction */
133 operand *left ; /* left if any */
134 operand *right ; /* right if any */
135 operand *result ; /* result of this op */
139 operand *condition ; /* if this is a conditional */
140 symbol *trueLabel ; /* true for conditional */
141 symbol *falseLabel; /* false for conditional */
145 operand *condition ; /* condition for the jump */
146 set *labels ; /* ordered set of labels */
152 symbol *label ; /* for a goto statement */
156 char *inlineAsm ; /* pointer to inline assembler code */
158 int lineno ; /* file & lineno for debug information */
162 /* various functions associated to iCode */
163 typedef struct icodeFuncTable
167 void (*iCodePrint)(FILE *,iCode *,char *) ;
168 iCode * (*iCodeCopy)(iCode *) ;
172 #define SKIP_IC2(x) (x->op == GOTO || \
174 x->op == FUNCTION || \
175 x->op == INLINEASM || \
176 x->op == ENDFUNCTION )
178 #define SKIP_IC1(x) (x->op == CALL || \
181 #define SKIP_IC(x) (x->op == PCALL || \
184 x->op == JUMPTABLE || \
185 x->op == RECEIVE || \
189 #define IS_CONDITIONAL(x) (x->op == EQ_OP || \
196 #define IS_TRUE_SYMOP(op) (op && IS_SYMOP(op) && !IS_ITEMP(op))
198 #define POINTER_SET(ic) ( ic && ic->op == '=' \
199 && IS_ITEMP(IC_RESULT(ic)) \
200 && IC_RESULT(ic)->isaddr )
202 #define POINTER_GET(ic) ( ic && ic->op == GET_VALUE_AT_ADDRESS \
203 && (IS_ITEMP(IC_LEFT(ic)) || IS_OP_LITERAL(IC_LEFT(ic)))\
204 && IC_LEFT(ic)->isaddr )
206 #define IS_ARITHMETIC_OP(x) (x && (x->op == '+' || \
211 #define IS_BITWISE_OP(x) (x && (x->op == BITWISEAND || \
215 #define ASSIGNMENT(ic) ( ic && ic->op == '=')
217 #define ASSIGN_SYM_TO_ITEMP(ic) (ic && ic->op == '=' && \
218 IS_TRUE_SYMOP(IC_RIGHT(ic)) && \
219 IS_ITEMP(IC_RESULT(ic)))
221 #define ASSIGN_ITEMP_TO_SYM(ic) (ic && ic->op == '=' && \
222 IS_TRUE_SYMOP(IC_RESULT(ic)) && \
223 IS_ITEMP(IC_RIGHT(ic)))
225 #define ASSIGN_ITEMP_TO_ITEMP(ic) (ic && ic->op == '=' &&\
227 IS_ITEMP(IC_RIGHT(ic)) &&\
228 IS_ITEMP(IC_RESULT(ic)))
230 #define ADD_SUBTRACT_ITEMP(ic) (ic && (ic->op == '+' || ic->op == '-') && \
231 IS_ITEMP(IC_RESULT(ic)) && \
232 ( ( IS_ITEMP(IC_LEFT(ic)) ) || ( IS_SYMOP(IC_LEFT(ic)) ) ) && \
233 IS_OP_LITERAL(IC_RIGHT(ic)))
235 #define ASSIGNMENT_TO_SELF(ic) (!POINTER_SET(ic) && !POINTER_GET(ic) && \
236 ic->op == '=' && IC_RESULT(ic)->key == IC_RIGHT(ic)->key )
238 #define SET_ISADDR(op,v) {op = operandFromOperand(op); op->isaddr = v;}
239 #define SET_RESULT_RIGHT(ic) {SET_ISADDR(IC_RIGHT(ic),0); SET_ISADDR(IC_RESULT(ic),0);}
241 #define OP_DEFS(op) op->operand.symOperand->defs
242 #define OP_USES(op) op->operand.symOperand->uses
243 /*-----------------------------------------------------------------*/
244 /* forward references for functions */
245 /*-----------------------------------------------------------------*/
246 iCode *reverseiCChain ( );
247 int isOperandVolatile (operand *,bool);
248 int isOperandGlobal (operand *);
249 void printiCChain ( iCode * , FILE *);
250 operand *ast2iCode ( ast *);
251 operand *geniCodeCast ( link *, operand *,bool);
252 operand *geniCodePtrPtrSubtract (operand *, operand *);
254 iCode *iCodeFromAst ( ast * );
255 int isiCodeEqual ( iCode *,iCode *) ;
256 int isOperandEqual ( operand *, operand *);
257 iCodeTable *getTableEntry (int );
258 int isOperandLiteral (operand *);
259 operand *operandOperation (operand *,operand *,int,link *);
260 double operandLitValue ( operand * );
261 operand *operandFromLit (float);
262 operand *operandFromOperand(operand *);
263 int isParameterToCall (value *,operand *);
264 iCode *newiCodeLabelGoto (int , symbol *);
265 symbol *newiTemp(char *);
266 symbol *newiTempLabel (char *);
267 symbol *newiTempPreheaderLabel ();
268 iCode *newiCode (int, operand *, operand *);
269 link *operandType(operand *);
270 operand *operandFromValue (value *);
271 operand *operandFromSymbol(symbol *);
272 link *aggrToPtr ( link *, bool);
273 int piCode (void *, FILE * );
274 int printOperand (operand *,FILE *);
275 void setOperandType (operand *, link *);
276 bool isOperandInFarSpace (operand *);
277 operand *opFromOpWithDU (operand *,bitVect *,bitVect *);
278 iCode *copyiCode (iCode *);
279 operand *newiTempFromOp( operand *);