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 */
91 struct symbol *symOperand; /* operand is of type symbol */
92 struct value *valOperand; /* operand is of type value */
93 struct sym_link *typeOperand; /* operand is of type typechain */
97 bitVect *usesDefs; /* which definitions are used by this */
98 struct asmop *aop; /* asm op for this operand */
102 /* definition for intermediate code */
103 #define IC_RESULT(x) (x)->ulrrcnd.lrr.result
104 #define IC_LEFT(x) (x)->ulrrcnd.lrr.left
105 #define IC_RIGHT(x) (x)->ulrrcnd.lrr.right
106 #define IC_COND(x) (x)->ulrrcnd.cnd.condition
107 #define IC_TRUE(x) (x)->ulrrcnd.cnd.trueLabel
108 #define IC_FALSE(x) (x)->ulrrcnd.cnd.falseLabel
109 #define IC_LABEL(x) (x)->argLabel.label
110 #define IC_ARGS(x) (x)->argLabel.args
111 #define IC_JTCOND(x) (x)->ulrrcnd.jmpTab.condition
112 #define IC_JTLABELS(x) (x)->ulrrcnd.jmpTab.labels
113 #define IC_INLINE(x) (x)->inlineAsm
117 unsigned int op; /* operation defined */
118 int key; /* running key for this iCode */
119 int seq; /* sequence number within routine */
120 short depth; /* loop depth of this iCode */
121 short level; /* scope level */
122 short block; /* sequential block number */
123 unsigned nosupdate:1; /* don't update spillocation with this */
124 unsigned generated:1; /* code generated for this one */
125 unsigned parmPush:1; /* parameter push Vs spill push */
126 unsigned supportRtn:1; /* will cause a call to a support routine */
127 unsigned regsSaved:1; /* registers have been saved */
128 unsigned bankSaved:1; /* register bank has been saved */
130 struct iCode *next; /* next in chain */
131 struct iCode *prev; /* previous in chain */
132 set *movedFrom; /* if this iCode gets moved to another block */
133 bitVect *rlive; /* ranges that are live at this point */
134 int defKey; /* key for the operand being defined */
135 bitVect *uses; /* vector of key of used symbols */
136 bitVect *rUsed; /* registers used by this instruction */
137 bitVect *rMask; /* registers in use during this instruction */
142 operand *left; /* left if any */
143 operand *right; /* right if any */
144 operand *result; /* result of this op */
150 operand *condition; /* if this is a conditional */
151 symbol *trueLabel; /* true for conditional */
152 symbol *falseLabel; /* false for conditional */
158 operand *condition; /* condition for the jump */
159 set *labels; /* ordered set of labels */
168 symbol *label; /* for a goto statement */
173 char *inlineAsm; /* pointer to inline assembler code */
175 int lineno; /* file & lineno for debug information */
178 int parmBytes; /* if call/pcall, count of parameter bytes
183 /* various functions associated to iCode */
184 typedef struct icodeFuncTable
188 void (*iCodePrint) (FILE *, iCode *, char *);
189 iCode *(*iCodeCopy) (iCode *);
194 #define SKIP_IC2(x) (x->op == GOTO || \
196 x->op == FUNCTION || \
197 x->op == INLINEASM || \
198 x->op == ENDFUNCTION )
200 #define SKIP_IC1(x) (x->op == CALL || \
203 #define SKIP_IC(x) (x->op == PCALL || \
206 x->op == JUMPTABLE || \
207 x->op == RECEIVE || \
211 #define IS_CONDITIONAL(x) (x->op == EQ_OP || \
218 #define IS_TRUE_SYMOP(op) (op && IS_SYMOP(op) && !IS_ITEMP(op))
220 #define POINTER_SET(ic) ( ic && ic->op == '=' \
221 && IS_ITEMP(IC_RESULT(ic)) \
222 && IC_RESULT(ic)->isaddr )
224 #define POINTER_GET(ic) ( ic && ic->op == GET_VALUE_AT_ADDRESS \
225 && (IS_ITEMP(IC_LEFT(ic)) || IS_OP_LITERAL(IC_LEFT(ic)))\
226 && IC_LEFT(ic)->isaddr )
228 #define IS_ARITHMETIC_OP(x) (x && (x->op == '+' || \
233 #define IS_BITWISE_OP(x) (x && (x->op == BITWISEAND || \
237 #define ASSIGNMENT(ic) ( ic && ic->op == '=')
239 #define ASSIGN_SYM_TO_ITEMP(ic) (ic && ic->op == '=' && \
240 IS_TRUE_SYMOP(IC_RIGHT(ic)) && \
241 IS_ITEMP(IC_RESULT(ic)))
243 #define ASSIGN_ITEMP_TO_SYM(ic) (ic && ic->op == '=' && \
244 IS_TRUE_SYMOP(IC_RESULT(ic)) && \
245 IS_ITEMP(IC_RIGHT(ic)))
247 #define ASSIGN_ITEMP_TO_ITEMP(ic) (ic && ic->op == '=' &&\
249 IS_ITEMP(IC_RIGHT(ic)) &&\
250 IS_ITEMP(IC_RESULT(ic)))
252 #define ADD_SUBTRACT_ITEMP(ic) (ic && (ic->op == '+' || ic->op == '-') && \
253 IS_ITEMP(IC_RESULT(ic)) && \
254 ( ( IS_ITEMP(IC_LEFT(ic)) ) || ( IS_SYMOP(IC_LEFT(ic)) ) ) && \
255 IS_OP_LITERAL(IC_RIGHT(ic)))
257 #define ASSIGNMENT_TO_SELF(ic) (!POINTER_SET(ic) && !POINTER_GET(ic) && \
258 ic->op == '=' && IC_RESULT(ic)->key == IC_RIGHT(ic)->key )
260 #define SET_ISADDR(op,v) {op = operandFromOperand(op); op->isaddr = v;}
261 #define SET_RESULT_RIGHT(ic) {SET_ISADDR(IC_RIGHT(ic),0); SET_ISADDR(IC_RESULT(ic),0);}
263 #define OP_DEFS(op) op->operand.symOperand->defs
264 #define OP_USES(op) op->operand.symOperand->uses
265 /*-----------------------------------------------------------------*/
266 /* forward references for functions */
267 /*-----------------------------------------------------------------*/
268 iCode *reverseiCChain ();
269 bool isOperandOnStack (operand *);
270 int isOperandVolatile (operand *, bool);
271 int isOperandGlobal (operand *);
272 void printiCChain (iCode *, FILE *);
273 operand *ast2iCode (ast *,int);
274 operand *geniCodeCast (sym_link *, operand *, bool);
275 operand *geniCodePtrPtrSubtract (operand *, operand *);
277 iCode *iCodeFromAst (ast *);
278 int isiCodeEqual (iCode *, iCode *);
279 int isOperandEqual (operand *, operand *);
280 iCodeTable *getTableEntry (int);
281 int isOperandLiteral (operand *);
282 operand *operandOperation (operand *, operand *, int, sym_link *);
283 double operandLitValue (operand *);
284 operand *operandFromLit (double);
285 operand *operandFromOperand (operand *);
286 int isParameterToCall (value *, operand *);
287 iCode *newiCodeLabelGoto (int, symbol *);
288 symbol *newiTemp (char *);
289 symbol *newiTempLabel (char *);
290 symbol *newiTempPreheaderLabel ();
291 iCode *newiCode (int, operand *, operand *);
292 sym_link *operandType (operand *);
293 operand *operandFromValue (value *);
294 operand *operandFromSymbol (symbol *);
295 sym_link *aggrToPtr (sym_link *, bool);
296 int piCode (void *, FILE *);
297 int printOperand (operand *, FILE *);
298 void setOperandType (operand *, sym_link *);
299 bool isOperandInFarSpace (operand *);
300 operand *opFromOpWithDU (operand *, bitVect *, bitVect *);
301 iCode *copyiCode (iCode *);
302 operand *newiTempFromOp (operand *);
303 /*-----------------------------------------------------------------*/
304 /* declaration of exported variables */
305 /*-----------------------------------------------------------------*/
306 extern char *filename;