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 ADDTOCHAIN(x) addSetHead(&iCodeChain,x)
54 #define LRFTYPE sym_link *ltype = operandType(left), \
55 *rtype = operandType(right) ;
56 #define LRETYPE sym_link *letype= getSpec(ltype) , \
57 *retype= getSpec(rtype);
58 #define LRTYPE LRFTYPE LRETYPE
59 #define IS_ITEMP(op) (IS_SYMOP(op) && op->operand.symOperand->isitmp == 1)
60 #define IS_PARM(op) (IS_SYMOP(op) && op->operand.symOperand->_isparm)
61 #define IS_ITEMPLBL(op) (IS_ITEMP(op) && op->operand.symOperand->isilbl == 1);
62 #define IS_OP_VOLATILE(op) (IS_SYMOP(op) && op->isvolatile)
63 #define IS_OP_LITERAL(op) (op && op->isLiteral)
64 #define IS_OP_GLOBAL(op) (IS_SYMOP(op) && op->isGlobal)
65 #define IS_OP_POINTER(op) (IS_SYMOP(op) && op->isPtr)
66 #define IS_OP_PARM(op) (IS_SYMOP(op) && op->isParm)
67 #define OP_SYMBOL(op) op->operand.symOperand
68 #define OP_SYM_TYPE(op) op->operand.symOperand->type
69 #define OP_SYM_ETYPE(op) op->operand.symOperand->etype
70 #define SPIL_LOC(op) op->operand.symOperand->usl.spillLoc
71 #define OP_LIVEFROM(op) op->operand.symOperand->liveFrom
72 #define OP_LIVETO(op) op->operand.symOperand->liveTo
73 #define OP_REQV(op) op->operand.symOperand->reqv
74 #define OP_ISLIVE_FCALL(op) (IS_ITEMP(op) && OP_SYMBOL(op)->isLiveFcall)
76 /* typedef for operand */
77 typedef struct operand
79 OPTYPE type; /* type of operand */
80 unsigned int isaddr:1; /* is an address */
81 unsigned int isvolatile:1; /* is a volatile operand */
82 unsigned int isGlobal:1; /* is a global operand */
83 unsigned int isPtr:1; /* is assigned a pointer */
84 unsigned int isGptr:1; /* is a generic pointer */
85 unsigned int isParm:1; /* is a parameter */
86 unsigned int isLiteral:1; /* operand is literal */
87 unsigned int noSpilLoc:1; /* cannot be assigned a spil location */
93 struct symbol *symOperand; /* operand is of type symbol */
94 struct value *valOperand; /* operand is of type value */
95 struct sym_link *typeOperand; /* operand is of type typechain */
99 bitVect *usesDefs; /* which definitions are used by this */
100 struct asmop *aop; /* asm op for this operand */
104 /* definition for intermediate code */
105 #define IC_RESULT(x) (x)->ulrrcnd.lrr.result
106 #define IC_LEFT(x) (x)->ulrrcnd.lrr.left
107 #define IC_RIGHT(x) (x)->ulrrcnd.lrr.right
108 #define IC_COND(x) (x)->ulrrcnd.cnd.condition
109 #define IC_TRUE(x) (x)->ulrrcnd.cnd.trueLabel
110 #define IC_FALSE(x) (x)->ulrrcnd.cnd.falseLabel
111 #define IC_LABEL(x) (x)->argLabel.label
112 #define IC_ARGS(x) (x)->argLabel.args
113 #define IC_JTCOND(x) (x)->ulrrcnd.jmpTab.condition
114 #define IC_JTLABELS(x) (x)->ulrrcnd.jmpTab.labels
115 #define IC_INLINE(x) (x)->inlineAsm
119 unsigned int op; /* operation defined */
120 int key; /* running key for this iCode */
121 int seq; /* sequence number within routine */
122 short depth; /* loop depth of this iCode */
123 short level; /* scope level */
124 short block; /* sequential block number */
125 unsigned nosupdate:1; /* don't update spillocation with this */
126 unsigned generated:1; /* code generated for this one */
127 unsigned parmPush:1; /* parameter push Vs spill push */
128 unsigned supportRtn:1; /* will cause a call to a support routine */
129 unsigned regsSaved:1; /* registers have been saved */
130 unsigned bankSaved:1; /* register bank has been saved */
132 struct iCode *next; /* next in chain */
133 struct iCode *prev; /* previous in chain */
134 set *movedFrom; /* if this iCode gets moved to another block */
135 bitVect *rlive; /* ranges that are live at this point */
136 int defKey; /* key for the operand being defined */
137 bitVect *uses; /* vector of key of used symbols */
138 bitVect *rUsed; /* registers used by this instruction */
139 bitVect *rMask; /* registers in use during this instruction */
144 operand *left; /* left if any */
145 operand *right; /* right if any */
146 operand *result; /* result of this op */
152 operand *condition; /* if this is a conditional */
153 symbol *trueLabel; /* true for conditional */
154 symbol *falseLabel; /* false for conditional */
160 operand *condition; /* condition for the jump */
161 set *labels; /* ordered set of labels */
170 symbol *label; /* for a goto statement */
175 char *inlineAsm; /* pointer to inline assembler code */
177 int lineno; /* file & lineno for debug information */
182 /* various functions associated to iCode */
183 typedef struct icodeFuncTable
187 void (*iCodePrint) (FILE *, iCode *, char *);
188 iCode *(*iCodeCopy) (iCode *);
193 #define SKIP_IC2(x) (x->op == GOTO || \
195 x->op == FUNCTION || \
196 x->op == INLINEASM || \
197 x->op == ENDFUNCTION )
199 #define SKIP_IC1(x) (x->op == CALL || \
202 #define SKIP_IC(x) (x->op == PCALL || \
205 x->op == JUMPTABLE || \
206 x->op == RECEIVE || \
210 #define IS_CONDITIONAL(x) (x->op == EQ_OP || \
217 #define IS_TRUE_SYMOP(op) (op && IS_SYMOP(op) && !IS_ITEMP(op))
219 #define POINTER_SET(ic) ( ic && ic->op == '=' \
220 && IS_ITEMP(IC_RESULT(ic)) \
221 && IC_RESULT(ic)->isaddr )
223 #define POINTER_GET(ic) ( ic && ic->op == GET_VALUE_AT_ADDRESS \
224 && (IS_ITEMP(IC_LEFT(ic)) || IS_OP_LITERAL(IC_LEFT(ic)))\
225 && IC_LEFT(ic)->isaddr )
227 #define IS_ARITHMETIC_OP(x) (x && (x->op == '+' || \
232 #define IS_BITWISE_OP(x) (x && (x->op == BITWISEAND || \
236 #define ASSIGNMENT(ic) ( ic && ic->op == '=')
238 #define ASSIGN_SYM_TO_ITEMP(ic) (ic && ic->op == '=' && \
239 IS_TRUE_SYMOP(IC_RIGHT(ic)) && \
240 IS_ITEMP(IC_RESULT(ic)))
242 #define ASSIGN_ITEMP_TO_SYM(ic) (ic && ic->op == '=' && \
243 IS_TRUE_SYMOP(IC_RESULT(ic)) && \
244 IS_ITEMP(IC_RIGHT(ic)))
246 #define ASSIGN_ITEMP_TO_ITEMP(ic) (ic && ic->op == '=' &&\
248 IS_ITEMP(IC_RIGHT(ic)) &&\
249 IS_ITEMP(IC_RESULT(ic)))
251 #define ADD_SUBTRACT_ITEMP(ic) (ic && (ic->op == '+' || ic->op == '-') && \
252 IS_ITEMP(IC_RESULT(ic)) && \
253 ( ( IS_ITEMP(IC_LEFT(ic)) ) || ( IS_SYMOP(IC_LEFT(ic)) ) ) && \
254 IS_OP_LITERAL(IC_RIGHT(ic)))
256 #define ASSIGNMENT_TO_SELF(ic) (!POINTER_SET(ic) && !POINTER_GET(ic) && \
257 ic->op == '=' && IC_RESULT(ic)->key == IC_RIGHT(ic)->key )
259 #define SET_ISADDR(op,v) {op = operandFromOperand(op); op->isaddr = v;}
260 #define SET_RESULT_RIGHT(ic) {SET_ISADDR(IC_RIGHT(ic),0); SET_ISADDR(IC_RESULT(ic),0);}
262 #define OP_DEFS(op) op->operand.symOperand->defs
263 #define OP_USES(op) op->operand.symOperand->uses
264 /*-----------------------------------------------------------------*/
265 /* forward references for functions */
266 /*-----------------------------------------------------------------*/
267 iCode *reverseiCChain ();
268 bool isOperandOnStack (operand *);
269 int isOperandVolatile (operand *, bool);
270 int isOperandGlobal (operand *);
271 void printiCChain (iCode *, FILE *);
272 operand *ast2iCode (ast *);
273 operand *geniCodeCast (sym_link *, operand *, bool);
274 operand *geniCodePtrPtrSubtract (operand *, operand *);
276 iCode *iCodeFromAst (ast *);
277 int isiCodeEqual (iCode *, iCode *);
278 int isOperandEqual (operand *, operand *);
279 iCodeTable *getTableEntry (int);
280 int isOperandLiteral (operand *);
281 operand *operandOperation (operand *, operand *, int, sym_link *);
282 double operandLitValue (operand *);
283 operand *operandFromLit (float);
284 operand *operandFromOperand (operand *);
285 int isParameterToCall (value *, operand *);
286 iCode *newiCodeLabelGoto (int, symbol *);
287 symbol *newiTemp (char *);
288 symbol *newiTempLabel (char *);
289 symbol *newiTempPreheaderLabel ();
290 iCode *newiCode (int, operand *, operand *);
291 sym_link *operandType (operand *);
292 operand *operandFromValue (value *);
293 operand *operandFromSymbol (symbol *);
294 sym_link *aggrToPtr (sym_link *, bool);
295 int piCode (void *, FILE *);
296 int printOperand (operand *, FILE *);
297 void setOperandType (operand *, sym_link *);
298 bool isOperandInFarSpace (operand *);
299 operand *opFromOpWithDU (operand *, bitVect *, bitVect *);
300 iCode *copyiCode (iCode *);
301 operand *newiTempFromOp (operand *);
302 /*-----------------------------------------------------------------*/
303 /* declaration of exported variables */
304 /*-----------------------------------------------------------------*/
305 extern char *filename;