1 /*------------------------------------------------------------------------
3 ralloc.c - source file for register allocation. PIC16 specific
5 Written By - Sandeep Dutta . sandeep.dutta@usa.net (1998)
6 Added Pic Port T.scott Dattalo scott@dattalo.com (2000)
7 Added Pic16 Port Martin Dubuc m.dubuc@rogers.com (2002)
9 This program is free software; you can redistribute it and/or modify it
10 under the terms of the GNU General Public License as published by the
11 Free Software Foundation; either version 2, or (at your option) any
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 In other words, you are welcome to use, share and improve this program.
24 You are forbidden to forbid anyone else to use, share and improve
25 what you give them. Help stamp out software-hoarding!
26 -------------------------------------------------------------------------*/
34 #if defined(__BORLANDC__) || defined(_MSC_VER)
35 #define STRCASECMP stricmp
37 #define STRCASECMP strcasecmp
43 /*-----------------------------------------------------------------*/
44 /* At this point we start getting processor specific although */
45 /* some routines are non-processor specific & can be reused when */
46 /* targetting other processors. The decision for this will have */
47 /* to be made on a routine by routine basis */
48 /* routines used to pack registers are most definitely not reusable */
49 /* since the pack the registers depending strictly on the MCU */
50 /*-----------------------------------------------------------------*/
52 regs *pic16_typeRegWithIdx (int idx, int type, int fixed);
53 extern void genpic16Code (iCode *);
63 bitVect *funcrUsed; /* registers used in a function */
69 /* Shared with gen.c */
70 int pic16_ptrRegReq; /* one byte pointer register required */
73 set *pic16_dynAllocRegs=NULL;
74 set *pic16_dynStackRegs=NULL;
75 set *pic16_dynProcessorRegs=NULL;
76 set *pic16_dynDirectRegs=NULL;
77 set *pic16_dynDirectBitRegs=NULL;
78 set *pic16_dynInternalRegs=NULL;
79 set *pic16_dynAccessRegs=NULL;
81 static hTab *dynDirectRegNames=NULL;
82 static hTab *dynAllocRegNames=NULL;
83 static hTab *dynProcRegNames=NULL;
84 static hTab *dynAccessRegNames=NULL;
85 //static hTab *regHash = NULL; /* a hash table containing ALL registers */
87 extern set *sectNames;
89 set *pic16_rel_udata=NULL; /* relocatable uninitialized registers */
90 set *pic16_fix_udata=NULL; /* absolute uninitialized registers */
91 set *pic16_equ_data=NULL; /* registers used by equates */
92 set *pic16_int_regs=NULL; /* internal registers placed in access bank 0 to 0x7f */
93 set *pic16_acs_udata=NULL; /* access bank variables */
95 set *pic16_builtin_functions=NULL;
97 static int dynrIdx=0x00; //0x20; // starting temporary register rIdx
98 static int rDirectIdx=0;
100 int pic16_nRegs = 128; // = sizeof (regspic16) / sizeof (regs);
102 int pic16_Gstack_base_addr=0; /* The starting address of registers that
103 * are used to pass and return parameters */
108 static void spillThis (symbol *);
109 int pic16_ralloc_debug = 0;
110 static FILE *debugF = NULL;
111 /*-----------------------------------------------------------------*/
112 /* debugLog - open a file for debugging information */
113 /*-----------------------------------------------------------------*/
114 //static void debugLog(char *inst,char *fmt, ...)
116 debugLog (char *fmt,...)
118 static int append = 0; // First time through, open the file without append.
121 //char *bufferP=buffer;
124 if (!pic16_ralloc_debug || !dstFileName)
130 /* create the file name */
131 strcpy (buffer, dstFileName);
132 strcat (buffer, ".d");
134 if (!(debugF = fopen (buffer, (append ? "a+" : "w"))))
136 werror (E_FILE_OPEN_ERR, buffer);
139 append = 1; // Next time debubLog is called, we'll append the debug info
145 vsprintf (buffer, fmt, ap);
147 fprintf (debugF, "%s", buffer);
149 while (isspace(*bufferP)) bufferP++;
151 if (bufferP && *bufferP)
152 lineCurr = (lineCurr ?
153 connectLine(lineCurr,newLineNode(lb)) :
154 (lineHead = newLineNode(lb)));
155 lineCurr->isInline = _G.inLine;
156 lineCurr->isDebug = _G.debugLine;
165 if(!pic16_ralloc_debug)return;
168 fputc ('\n', debugF);
170 /*-----------------------------------------------------------------*/
171 /* debugLogClose - closes the debug log file (if opened) */
172 /*-----------------------------------------------------------------*/
182 #define AOP(op) op->aop
185 debugAopGet (char *str, operand * op)
187 if(!pic16_ralloc_debug)return NULL;
192 printOperand (op, debugF);
199 decodeOp (unsigned int op)
201 if (op < 128 && op > ' ') {
202 buffer[0] = (op & 0xff);
208 case IDENTIFIER: return "IDENTIFIER";
209 case TYPE_NAME: return "TYPE_NAME";
210 case CONSTANT: return "CONSTANT";
211 case STRING_LITERAL: return "STRING_LITERAL";
212 case SIZEOF: return "SIZEOF";
213 case PTR_OP: return "PTR_OP";
214 case INC_OP: return "INC_OP";
215 case DEC_OP: return "DEC_OP";
216 case LEFT_OP: return "LEFT_OP";
217 case RIGHT_OP: return "RIGHT_OP";
218 case LE_OP: return "LE_OP";
219 case GE_OP: return "GE_OP";
220 case EQ_OP: return "EQ_OP";
221 case NE_OP: return "NE_OP";
222 case AND_OP: return "AND_OP";
223 case OR_OP: return "OR_OP";
224 case MUL_ASSIGN: return "MUL_ASSIGN";
225 case DIV_ASSIGN: return "DIV_ASSIGN";
226 case MOD_ASSIGN: return "MOD_ASSIGN";
227 case ADD_ASSIGN: return "ADD_ASSIGN";
228 case SUB_ASSIGN: return "SUB_ASSIGN";
229 case LEFT_ASSIGN: return "LEFT_ASSIGN";
230 case RIGHT_ASSIGN: return "RIGHT_ASSIGN";
231 case AND_ASSIGN: return "AND_ASSIGN";
232 case XOR_ASSIGN: return "XOR_ASSIGN";
233 case OR_ASSIGN: return "OR_ASSIGN";
234 case TYPEDEF: return "TYPEDEF";
235 case EXTERN: return "EXTERN";
236 case STATIC: return "STATIC";
237 case AUTO: return "AUTO";
238 case REGISTER: return "REGISTER";
239 case CODE: return "CODE";
240 case EEPROM: return "EEPROM";
241 case INTERRUPT: return "INTERRUPT";
242 case SFR: return "SFR";
243 case AT: return "AT";
244 case SBIT: return "SBIT";
245 case REENTRANT: return "REENTRANT";
246 case USING: return "USING";
247 case XDATA: return "XDATA";
248 case DATA: return "DATA";
249 case IDATA: return "IDATA";
250 case PDATA: return "PDATA";
251 case VAR_ARGS: return "VAR_ARGS";
252 case CRITICAL: return "CRITICAL";
253 case NONBANKED: return "NONBANKED";
254 case BANKED: return "BANKED";
255 case CHAR: return "CHAR";
256 case SHORT: return "SHORT";
257 case INT: return "INT";
258 case LONG: return "LONG";
259 case SIGNED: return "SIGNED";
260 case UNSIGNED: return "UNSIGNED";
261 case FLOAT: return "FLOAT";
262 case DOUBLE: return "DOUBLE";
263 case CONST: return "CONST";
264 case VOLATILE: return "VOLATILE";
265 case VOID: return "VOID";
266 case BIT: return "BIT";
267 case STRUCT: return "STRUCT";
268 case UNION: return "UNION";
269 case ENUM: return "ENUM";
270 case ELIPSIS: return "ELIPSIS";
271 case RANGE: return "RANGE";
272 case FAR: return "FAR";
273 case CASE: return "CASE";
274 case DEFAULT: return "DEFAULT";
275 case IF: return "IF";
276 case ELSE: return "ELSE";
277 case SWITCH: return "SWITCH";
278 case WHILE: return "WHILE";
279 case DO: return "DO";
280 case FOR: return "FOR";
281 case GOTO: return "GOTO";
282 case CONTINUE: return "CONTINUE";
283 case BREAK: return "BREAK";
284 case RETURN: return "RETURN";
285 case INLINEASM: return "INLINEASM";
286 case IFX: return "IFX";
287 case ADDRESS_OF: return "ADDRESS_OF";
288 case GET_VALUE_AT_ADDRESS: return "GET_VALUE_AT_ADDRESS";
289 case SPIL: return "SPIL";
290 case UNSPIL: return "UNSPIL";
291 case GETHBIT: return "GETHBIT";
292 case BITWISEAND: return "BITWISEAND";
293 case UNARYMINUS: return "UNARYMINUS";
294 case IPUSH: return "IPUSH";
295 case IPOP: return "IPOP";
296 case PCALL: return "PCALL";
297 case ENDFUNCTION: return "ENDFUNCTION";
298 case JUMPTABLE: return "JUMPTABLE";
299 case RRC: return "RRC";
300 case RLC: return "RLC";
301 case CAST: return "CAST";
302 case CALL: return "CALL";
303 case PARAM: return "PARAM ";
304 case NULLOP: return "NULLOP";
305 case BLOCK: return "BLOCK";
306 case LABEL: return "LABEL";
307 case RECEIVE: return "RECEIVE";
308 case SEND: return "SEND";
310 sprintf (buffer, "unkown op %d %c", op, op & 0xff);
314 /*-----------------------------------------------------------------*/
315 /*-----------------------------------------------------------------*/
317 debugLogRegType (short type)
319 if(!pic16_ralloc_debug)return NULL;
321 case REG_GPR: return "REG_GPR";
322 case REG_PTR: return "REG_PTR";
323 case REG_CND: return "REG_CND";
325 sprintf (buffer, "unknown reg type %d", type);
330 /*-----------------------------------------------------------------*/
331 /*-----------------------------------------------------------------*/
332 static int regname2key(char const *name)
341 key += (*name++) + 1;
345 return ( (key + (key >> 4) + (key>>8)) & 0x3f);
349 /*-----------------------------------------------------------------*/
350 /* newReg - allocate and init memory for a new register */
351 /*-----------------------------------------------------------------*/
352 regs* newReg(short type, short pc_type, int rIdx, char *name, int size, int alias, operand *refop)
357 dReg = Safe_calloc(1,sizeof(regs));
359 dReg->pc_type = pc_type;
362 dReg->name = Safe_strdup(name);
364 sprintf(buffer,"r0x%02X", dReg->rIdx);
367 dReg->name = Safe_strdup(buffer);
375 if(type == REG_SFR) {
377 dReg->address = rIdx;
378 dReg->accessBank = 1;
382 dReg->accessBank = 0;
385 // fprintf(stderr,"newReg: %s, rIdx = 0x%02x\taccess= %d\tregop= %p\n",dReg->name,rIdx, dReg->accessBank, refop);
389 dReg->reg_alias = NULL;
390 dReg->reglives.usedpFlows = newSet();
391 dReg->reglives.assignedpFlows = newSet();
394 if(!(type == REG_SFR && alias == 0x80))
395 hTabAddItem(&dynDirectRegNames, regname2key(name), dReg);
400 /*-----------------------------------------------------------------*/
401 /* regWithIdx - Search through a set of registers that matches idx */
402 /*-----------------------------------------------------------------*/
404 regWithIdx (set *dRegs, int idx, unsigned fixed)
408 for (dReg = setFirstItem(dRegs) ; dReg ;
409 dReg = setNextItem(dRegs)) {
411 if(idx == dReg->rIdx && (fixed == dReg->isFixed)) {
419 /*-----------------------------------------------------------------*/
420 /* regFindFree - Search for a free register in a set of registers */
421 /*-----------------------------------------------------------------*/
423 regFindFree (set *dRegs)
427 for (dReg = setFirstItem(dRegs) ; dReg ;
428 dReg = setNextItem(dRegs)) {
430 // fprintf(stderr, "%s:%d checking register %s (%p) [rIdx: 0x%02x] if free= %d\n",
431 // __FILE__, __LINE__, dReg->name, dReg, dReg->rIdx, dReg->isFree);
440 /*-----------------------------------------------------------------*/
441 /* pic16_initStack - allocate registers for a pseudo stack */
442 /*-----------------------------------------------------------------*/
443 void pic16_initStack(int base_address, int size)
448 pic16_Gstack_base_addr = base_address;
449 //fprintf(stderr,"initStack");
451 for(i = 0; i<size; i++)
452 addSet(&pic16_dynStackRegs,newReg(REG_STK, PO_GPR_TEMP,base_address++,NULL,1,0, NULL));
455 /*-----------------------------------------------------------------*
456 *-----------------------------------------------------------------*/
458 pic16_allocProcessorRegister(int rIdx, char * name, short po_type, int alias)
460 regs *reg = newReg(REG_SFR, po_type, rIdx, name, 1, alias, NULL);
462 // fprintf(stderr,"%s: %s addr =0x%x\n",__FUNCTION__, name,rIdx);
464 reg->wasUsed = 0; // we do not know if they are going to be used at all
465 reg->accessBank = 1; // implicit add access Bank
467 hTabAddItem(&dynProcRegNames, regname2key(reg->name), reg);
469 return addSet(&pic16_dynProcessorRegs, reg);
472 /*-----------------------------------------------------------------*
473 *-----------------------------------------------------------------*/
476 pic16_allocInternalRegister(int rIdx, char * name, short po_type, int alias)
478 regs * reg = newReg(REG_GPR, po_type, rIdx, name,1,alias, NULL);
480 // fprintf(stderr,"%s:%d: %s %s addr =0x%x\n",__FILE__, __LINE__, __FUNCTION__, name, rIdx);
484 return addSet(&pic16_dynInternalRegs,reg);
489 /*-----------------------------------------------------------------*/
490 /* allocReg - allocates register of given type */
491 /*-----------------------------------------------------------------*/
493 allocReg (short type)
498 if(dynrIdx > pic16_nRegs)
502 /* try to reuse some unused registers */
503 reg = regFindFree( pic16_dynAllocRegs );
506 // fprintf(stderr, "%s: found FREE register %s\n", __FILE__, reg->name);
510 reg = newReg(REG_GPR, PO_GPR_TEMP, dynrIdx++, NULL, 1, 0, NULL);
511 // addSet(&pic16_dynAllocRegs, reg);
514 addSet(&pic16_dynAllocRegs, reg);
515 hTabAddItem(&dynAllocRegNames, regname2key(reg->name), reg);
519 // debugLog ("%s of type %s for register rIdx: %d\n", __FUNCTION__, debugLogRegType (type), dynrIdx-1);
521 // fprintf(stderr,"%s:%d: %s\t%s addr= 0x%x\trIdx= 0x%02x isFree: %d\n",
522 // __FILE__, __LINE__, __FUNCTION__, reg->name, reg->address, reg->rIdx, reg->isFree);
525 reg->accessBank = 1; /* this is a temporary register alloc in accessBank */
526 reg->isLocal = 1; /* this is a local frame register */
531 // fprintf(stderr, "%s:%d adding %s into function %s regsUsed\n", __FUNCTION__, __LINE__, reg->name, currFunc->name);
532 currFunc->regsUsed = bitVectSetBit (currFunc->regsUsed, reg->rIdx);
535 return (reg); // addSet(&pic16_dynAllocRegs,reg);
540 /*-----------------------------------------------------------------*/
541 /* pic16_dirregWithName - search for register by name */
542 /*-----------------------------------------------------------------*/
544 pic16_dirregWithName (char *name)
552 /* hash the name to get a key */
554 hkey = regname2key(name);
556 // fprintf(stderr, "%s:%d: name = %s\thash = %d\n", __FUNCTION__, __LINE__, name, hkey);
558 reg = hTabFirstItemWK(dynDirectRegNames, hkey);
562 if(STRCASECMP(reg->name, name) == 0) {
563 // fprintf(stderr, "%s:%d: FOUND name = %s\thash = %d\n", __FUNCTION__, __LINE__, reg->name, hkey);
567 reg = hTabNextItemWK (dynDirectRegNames);
571 return NULL; // name wasn't found in the hash table
574 /*-----------------------------------------------------------------*/
575 /* pic16_allocregWithName - search for register by name */
576 /*-----------------------------------------------------------------*/
578 pic16_allocregWithName (char *name)
586 /* hash the name to get a key */
588 hkey = regname2key(name);
590 // fprintf(stderr, "%s:%d: name = %s\thash = %d\n", __FUNCTION__, __LINE__, name, hkey);
592 reg = hTabFirstItemWK(dynAllocRegNames, hkey);
596 if(STRCASECMP(reg->name, name) == 0) {
600 reg = hTabNextItemWK (dynAllocRegNames);
604 return NULL; // name wasn't found in the hash table
609 /*-----------------------------------------------------------------*/
610 /* pic16_procregWithName - search for register by name */
611 /*-----------------------------------------------------------------*/
613 pic16_procregWithName (char *name)
621 /* hash the name to get a key */
623 hkey = regname2key(name);
625 // fprintf(stderr, "%s:%d: name = %s\thash = %d\n", __FUNCTION__, __LINE__, name, hkey);
627 reg = hTabFirstItemWK(dynProcRegNames, hkey);
631 if(STRCASECMP(reg->name, name) == 0) {
635 reg = hTabNextItemWK (dynProcRegNames);
639 return NULL; // name wasn't found in the hash table
643 /*-----------------------------------------------------------------*/
644 /* pic16_accessregWithName - search for register by name */
645 /*-----------------------------------------------------------------*/
647 pic16_accessregWithName (char *name)
655 /* hash the name to get a key */
657 hkey = regname2key(name);
659 // fprintf(stderr, "%s:%d: name = %s\thash = %d\n", __FUNCTION__, __LINE__, name, hkey);
661 reg = hTabFirstItemWK(dynAccessRegNames, hkey);
665 if(STRCASECMP(reg->name, name) == 0) {
669 reg = hTabNextItemWK (dynAccessRegNames);
673 return NULL; // name wasn't found in the hash table
677 regs *pic16_regWithName(char *name)
681 reg = pic16_dirregWithName( name );
684 reg = pic16_procregWithName( name );
687 reg = pic16_allocregWithName( name );
690 reg = pic16_accessregWithName( name );
697 /*-----------------------------------------------------------------*/
698 /* pic16_allocDirReg - allocates register of given type */
699 /*-----------------------------------------------------------------*/
701 pic16_allocDirReg (operand *op )
707 debugLog ("%s BAD, op is NULL\n", __FUNCTION__);
708 // fprintf(stderr, "%s BAD, op is NULL\n", __FUNCTION__);
712 name = OP_SYMBOL (op)->rname[0] ? OP_SYMBOL (op)->rname : OP_SYMBOL (op)->name;
715 if(!SPEC_OCLS( OP_SYM_ETYPE(op))) {
717 if(pic16_debug_verbose)
719 fprintf(stderr, "%s:%d symbol %s(r:%s) is not assigned to a memmap\n", __FILE__, __LINE__,
720 OP_SYMBOL(op)->name, OP_SYMBOL(op)->rname);
726 if(!IN_DIRSPACE( SPEC_OCLS( OP_SYM_ETYPE(op)))
727 || !IN_FARSPACE(SPEC_OCLS( OP_SYM_ETYPE(op))) ) {
730 if(pic16_debug_verbose) {
731 fprintf(stderr, "dispace:%d farspace:%d codespace:%d regspace:%d stack:%d eeprom: %d regparm: %d isparm: %d\n",
732 IN_DIRSPACE( SPEC_OCLS( OP_SYM_ETYPE(op))),
733 IN_FARSPACE( SPEC_OCLS( OP_SYM_ETYPE(op))),
734 IN_CODESPACE( SPEC_OCLS( OP_SYM_ETYPE(op))),
735 IN_REGSP( SPEC_OCLS( OP_SYM_ETYPE(op))),
736 IN_STACK( OP_SYM_ETYPE(op)),
737 SPEC_OCLS(OP_SYM_ETYPE(op)) == eeprom,
738 IS_REGPARM(OP_SYM_ETYPE(op)),
741 fprintf(stderr, "%s:%d symbol %s NOT in dirspace\n", __FILE__, __LINE__,
742 OP_SYMBOL(op)->name);
750 if (IS_CODE ( OP_SYM_ETYPE(op)) ) {
751 // fprintf(stderr, "%s:%d sym: %s in codespace\n", __FUNCTION__, __LINE__, OP_SYMBOL(op)->name);
756 debugLog ("%s:%d symbol name %s\n", __FUNCTION__, __LINE__, name);
757 // fprintf(stderr, "%s symbol name %s\n", __FUNCTION__,name);
760 if(SPEC_CONST ( OP_SYM_ETYPE(op)) && (IS_CHAR ( OP_SYM_ETYPE(op)) )) {
761 debugLog(" %d const char\n",__LINE__);
762 debugLog(" value = %s \n",SPEC_CVAL( OP_SYM_ETYPE(op)));
763 // fprintf(stderr, " %d const char\n",__LINE__);
764 // fprintf(stderr, " value = %s \n",SPEC_CVAL( OP_SYM_ETYPE(op)));
768 debugLog(" %d storage class %d \n",__LINE__,SPEC_SCLS( OP_SYM_ETYPE(op)));
769 if (IS_CODE ( OP_SYM_ETYPE(op)) )
770 debugLog(" %d code space\n",__LINE__);
772 if (IS_INTEGRAL ( OP_SYM_ETYPE(op)) )
773 debugLog(" %d integral\n",__LINE__);
775 if (IS_LITERAL ( OP_SYM_ETYPE(op)) )
776 debugLog(" %d literal\n",__LINE__);
778 if (IS_SPEC ( OP_SYM_ETYPE(op)) )
779 debugLog(" %d specifier\n",__LINE__);
781 debugAopGet(NULL, op);
785 reg = pic16_dirregWithName(name);
789 int regtype = REG_GPR;
791 /* if this is at an absolute address, then get the address. */
792 if (SPEC_ABSA ( OP_SYM_ETYPE(op)) ) {
793 address = SPEC_ADDR ( OP_SYM_ETYPE(op));
794 // fprintf(stderr,"reg %s is at an absolute address: 0x%03x\n",name,address);
797 /* Register wasn't found in hash, so let's create
798 * a new one and put it in the hash table AND in the
799 * dynDirectRegNames set */
800 if(IS_CODE(OP_SYM_ETYPE(op)) || IN_CODESPACE( SPEC_OCLS( OP_SYM_ETYPE(op)))) {
801 debugLog("%s:%d sym: %s in codespace\n", __FUNCTION__, __LINE__, OP_SYMBOL(op)->name);
806 if(OP_SYMBOL(op)->onStack) {
807 fprintf(stderr, "%s:%d onStack %s offset: %d\n", __FILE__, __LINE__,
808 OP_SYMBOL(op)->name, OP_SYMBOL(op)->stack);
811 if(!IN_DIRSPACE( SPEC_OCLS( OP_SYM_ETYPE(op)))
812 || !IN_FARSPACE(SPEC_OCLS( OP_SYM_ETYPE(op))) ) {
815 if(pic16_debug_verbose)
817 fprintf(stderr, "dispace:%d farspace:%d codespace:%d regspace:%d stack:%d eeprom: %d\n",
818 IN_DIRSPACE( SPEC_OCLS( OP_SYM_ETYPE(op))),
819 IN_FARSPACE( SPEC_OCLS( OP_SYM_ETYPE(op))),
820 IN_CODESPACE( SPEC_OCLS( OP_SYM_ETYPE(op))),
821 IN_REGSP( SPEC_OCLS( OP_SYM_ETYPE(op))),
822 IN_STACK( OP_SYM_ETYPE(op)),
823 SPEC_OCLS(OP_SYM_ETYPE(op)) == eeprom);
825 fprintf(stderr, "%s:%d symbol %s NOT in dirspace\n", __FILE__, __LINE__,
826 OP_SYMBOL(op)->name);
831 reg = newReg(regtype, PO_DIR, rDirectIdx++, name,getSize (OP_SYMBOL (op)->type),0, op);
832 debugLog ("%d -- added %s to hash, size = %d\n", __LINE__, name,reg->size);
834 if( SPEC_SCLS( OP_SYM_ETYPE( op ) ) == S_REGISTER ) {
835 fprintf(stderr, "%s:%d symbol %s is declared as register\n", __FILE__, __LINE__,
839 checkAddReg(&pic16_dynAccessRegs, reg);
840 hTabAddItem(&dynAccessRegNames, regname2key(name), reg);
846 // if (SPEC_ABSA ( OP_SYM_ETYPE(op)) ) {
847 // fprintf(stderr, " ralloc.c at fixed address: %s - changing to REG_SFR\n",name);
848 // reg->type = REG_SFR;
851 if (IS_BITVAR (OP_SYM_ETYPE(op))) {
852 // fprintf(stderr, "%s:%d adding %s in bit registers\n", __FILE__, __LINE__, reg->name);
853 addSet(&pic16_dynDirectBitRegs, reg);
856 // fprintf(stderr, "%s:%d adding %s in direct registers\n", __FILE__, __LINE__, reg->name);
857 // addSet(&pic16_dynDirectRegs, reg);
859 checkAddReg(&pic16_dynDirectRegs, reg);
863 // debugLog (" -- %s is declared at address 0x30000x\n",name);
864 return (reg); /* This was NULL before, but since we found it
865 * why not just return it?! */
868 if (SPEC_ABSA ( OP_SYM_ETYPE(op)) ) {
870 reg->address = SPEC_ADDR ( OP_SYM_ETYPE(op));
872 /* work around for user defined registers in access bank */
873 if((reg->address>= 0x00 && reg->address < 0x80)
874 || (reg->address >= 0xf80 && reg->address <= 0xfff))
877 debugLog (" -- and it is at a fixed address 0x%02x\n",reg->address);
883 /*-----------------------------------------------------------------*/
884 /* pic16_allocRegByName - allocates register of given type */
885 /*-----------------------------------------------------------------*/
887 pic16_allocRegByName (char *name, int size, operand *op)
893 fprintf(stderr, "%s - allocating a NULL register\n",__FUNCTION__);
897 /* First, search the hash table to see if there is a register with this name */
898 reg = pic16_dirregWithName(name);
902 /* Register wasn't found in hash, so let's create
903 * a new one and put it in the hash table AND in the
904 * dynDirectRegNames set */
906 fprintf (stderr,"%s:%d symbol name %s\tregop= %p\n", __FUNCTION__, __LINE__, name, op);
908 reg = newReg(REG_GPR, PO_DIR, rDirectIdx++, name,size,0, op);
910 debugLog ("%d -- added %s to hash, size = %d\n", __LINE__, name,reg->size);
911 //fprintf(stderr, " -- added %s to hash, size = %d\n", name,reg->size);
913 //hTabAddItem(&dynDirectRegNames, regname2key(name), reg); /* initially commented out */
914 addSet(&pic16_dynDirectRegs, reg);
920 /*-----------------------------------------------------------------*/
921 /* RegWithIdx - returns pointer to register with index number */
922 /*-----------------------------------------------------------------*/
923 regs *pic16_typeRegWithIdx (int idx, int type, int fixed)
928 debugLog ("%s - requesting index = 0x%x\n", __FUNCTION__,idx);
929 // fprintf(stderr, "%s - requesting index = 0x%x\n", __FUNCTION__, idx);
934 if( (dReg = regWithIdx ( pic16_dynAllocRegs, idx, fixed)) != NULL) {
936 debugLog ("Found a Dynamic Register!\n");
939 if( (dReg = regWithIdx ( pic16_dynDirectRegs, idx, fixed)) != NULL ) {
940 debugLog ("Found a Direct Register!\n");
946 if( (dReg = regWithIdx ( pic16_dynStackRegs, idx, fixed)) != NULL ) {
947 debugLog ("Found a Stack Register!\n");
952 if( (dReg = regWithIdx ( pic16_dynProcessorRegs, idx, 1)) != NULL ) {
953 debugLog ("Found a Processor Register!\n");
967 /*-----------------------------------------------------------------*/
968 /* pic16_regWithIdx - returns pointer to register with index number*/
969 /*-----------------------------------------------------------------*/
971 pic16_regWithIdx (int idx)
975 if( (dReg = pic16_typeRegWithIdx(idx,REG_GPR,0)) != NULL)
978 if( (dReg = pic16_typeRegWithIdx(idx,REG_SFR,0)) != NULL)
982 if( (dReg = pic16_typeRegWithIdx(idx,REG_STK,0)) != NULL)
989 /*-----------------------------------------------------------------*/
990 /* pic16_regWithIdx - returns pointer to register with index number */
991 /*-----------------------------------------------------------------*/
993 pic16_allocWithIdx (int idx)
998 debugLog ("%s - allocating with index = 0x%x\n", __FUNCTION__,idx);
999 // fprintf(stderr, "%s - allocating with index = 0x%x\n", __FUNCTION__,idx);
1001 if( (dReg = regWithIdx ( pic16_dynAllocRegs, idx,0)) != NULL) {
1003 debugLog ("Found a Dynamic Register!\n");
1004 } else if( (dReg = regWithIdx ( pic16_dynStackRegs, idx,0)) != NULL ) {
1005 debugLog ("Found a Stack Register!\n");
1006 } else if( (dReg = regWithIdx ( pic16_dynProcessorRegs, idx,1)) != NULL ) {
1007 debugLog ("Found a Processor Register!\n");
1008 fprintf(stderr, "Found a processor register! %s\n", dReg->name);
1009 } else if( (dReg = regWithIdx ( pic16_dynInternalRegs, idx,0)) != NULL ) {
1010 debugLog ("Found an Internal Register!\n");
1013 debugLog ("Dynamic Register not found\n");
1016 //fprintf(stderr,"%s %d - requested register: 0x%x\n",__FUNCTION__,__LINE__,idx);
1017 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
1018 "regWithIdx not found");
1028 /*-----------------------------------------------------------------*/
1029 /*-----------------------------------------------------------------*/
1031 pic16_findFreeReg(short type)
1038 if((dReg = regFindFree(pic16_dynAllocRegs)) != NULL)
1040 return allocReg( REG_GPR ); //addSet(&pic16_dynAllocRegs,newReg(REG_GPR, PO_GPR_TEMP,dynrIdx++,NULL,1,0, NULL));
1044 if((dReg = regFindFree(pic16_dynStackRegs)) != NULL)
1056 /*-----------------------------------------------------------------*/
1057 /* freeReg - frees a register */
1058 /*-----------------------------------------------------------------*/
1060 freeReg (regs * reg)
1062 debugLog ("%s\n", __FUNCTION__);
1063 // fprintf(stderr, "%s:%d register %s (%p) is freed\n", __FILE__, __LINE__, reg->name, reg);
1068 /*-----------------------------------------------------------------*/
1069 /* nFreeRegs - returns number of free registers */
1070 /*-----------------------------------------------------------------*/
1072 nFreeRegs (int type)
1078 /* although I fixed the register allocation/freeing scheme
1079 * the for loop below doesn't give valid results. I do not
1080 * know why yet. -- VR 10-Jan-2003 */
1085 /* dynamically allocate as many as we need and worry about
1086 * fitting them into a PIC later */
1088 debugLog ("%s\n", __FUNCTION__);
1090 for(reg = setFirstItem(pic16_dynAllocRegs); reg; reg=setNextItem(pic16_dynAllocRegs))
1091 if((reg->type == type) && reg->isFree)nfr++;
1093 fprintf(stderr, "%s:%d # of free registers= %d\n", __FILE__, __LINE__, nfr);
1097 /*-----------------------------------------------------------------*/
1098 /* nfreeRegsType - free registers with type */
1099 /*-----------------------------------------------------------------*/
1101 nfreeRegsType (int type)
1104 debugLog ("%s\n", __FUNCTION__);
1105 if (type == REG_PTR)
1107 if ((nfr = nFreeRegs (type)) == 0)
1108 return nFreeRegs (REG_GPR);
1111 return nFreeRegs (type);
1114 static void writeSetUsedRegs(FILE *of, set *dRegs)
1119 for (dReg = setFirstItem(dRegs) ; dReg ;
1120 dReg = setNextItem(dRegs)) {
1123 fprintf (of, "\t%s\n",dReg->name);
1129 extern void pic16_groupRegistersInSection(set *regset);
1131 extern void pic16_dump_equates(FILE *of, set *equs);
1132 extern void pic16_dump_access(FILE *of, set *section);
1133 //extern void pic16_dump_map(void);
1134 extern void pic16_dump_usection(FILE *of, set *section, int fix);
1135 extern void pic16_dump_isection(FILE *of, set *section, int fix);
1136 extern void pic16_dump_int_registers(FILE *of, set *section);
1137 extern void pic16_dump_idata(FILE *of, set *idataSymSet);
1139 extern void pic16_dump_gsection(FILE *of, set *sections);
1141 static void packBits(set *bregs)
1145 regs *bitfield=NULL;
1146 regs *relocbitfield=NULL;
1152 for (regset = bregs ; regset ;
1153 regset = regset->next) {
1155 breg = regset->item;
1156 breg->isBitField = 1;
1157 //fprintf(stderr,"bit reg: %s\n",breg->name);
1160 //fprintf(stderr,"packing bit at fixed address = 0x%03x\n",breg->address);
1162 bitfield = pic16_typeRegWithIdx (breg->address >> 3, -1 , 1);
1163 breg->rIdx = breg->address & 7;
1164 breg->address >>= 3;
1167 sprintf (buffer, "fbitfield%02x", breg->address);
1168 //fprintf(stderr,"new bit field\n");
1169 bitfield = newReg(REG_SFR, PO_GPR_BIT,breg->address,buffer,1,0, NULL);
1170 bitfield->isBitField = 1;
1171 bitfield->isFixed = 1;
1172 bitfield->address = breg->address;
1173 addSet(&pic16_dynDirectRegs,bitfield);
1174 //hTabAddItem(&dynDirectRegNames, regname2key(buffer), bitfield);
1176 //fprintf(stderr," which is occupied by %s (addr = %d)\n",bitfield->name,bitfield->address);
1179 breg->reg_alias = bitfield;
1183 if(!relocbitfield || bit_no >7) {
1186 sprintf (buffer, "bitfield%d", byte_no);
1187 //fprintf(stderr,"new relocatable bit field\n");
1188 relocbitfield = newReg(REG_GPR, PO_GPR_BIT,rDirectIdx++,buffer,1,0, NULL);
1189 relocbitfield->isBitField = 1;
1190 addSet(&pic16_dynDirectRegs,relocbitfield);
1191 //hTabAddItem(&dynDirectRegNames, regname2key(buffer), relocbitfield);
1195 breg->reg_alias = relocbitfield;
1196 breg->address = rDirectIdx; /* byte_no; */
1197 breg->rIdx = bit_no++;
1203 void pic16_writeUsedRegs(FILE *of)
1205 packBits(pic16_dynDirectBitRegs);
1207 // fprintf(stderr, "%s: pic16_dynAllocRegs\n", __FUNCTION__);
1208 pic16_groupRegistersInSection(pic16_dynAllocRegs);
1210 // fprintf(stderr, "%s: pic16_dynInternalRegs\n", __FUNCTION__);
1211 pic16_groupRegistersInSection(pic16_dynInternalRegs);
1213 // fprintf(stderr, "%s: pic16_dynStackRegs\n", __FUNCTION__);
1214 pic16_groupRegistersInSection(pic16_dynStackRegs);
1216 // fprintf(stderr, "%s: pic16_dynDirectRegs\n", __FUNCTION__);
1217 pic16_groupRegistersInSection(pic16_dynDirectRegs);
1219 // fprintf(stderr, "%s: pic16_dynDirectBitsRegs\n", __FUNCTION__);
1220 pic16_groupRegistersInSection(pic16_dynDirectBitRegs);
1222 // fprintf(stderr, "%s: pic16_dynProcessorRegs\n", __FUNCTION__);
1223 pic16_groupRegistersInSection(pic16_dynProcessorRegs);
1225 // fprintf(stderr, "%s: pic16_dynAccessRegs\n", __FUNCTION__);
1226 pic16_groupRegistersInSection(pic16_dynAccessRegs);
1229 pic16_dump_equates(of, pic16_equ_data);
1231 // pic16_dump_esection(of, pic16_rel_eedata, 0);
1232 // pic16_dump_esection(of, pic16_fix_eedata, 0);
1234 /* dump access bank symbols */
1235 pic16_dump_access(of, pic16_acs_udata);
1237 /* dump initialised data */
1238 pic16_dump_isection(of, rel_idataSymSet, 0);
1239 pic16_dump_isection(of, fix_idataSymSet, 1);
1241 /* dump internal registers */
1242 pic16_dump_int_registers(of, pic16_int_regs);
1244 /* dump generic section variables */
1245 pic16_dump_gsection(of, sectNames);
1247 /* dump other variables */
1248 pic16_dump_usection(of, pic16_rel_udata, 0);
1249 pic16_dump_usection(of, pic16_fix_udata, 1);
1254 /*-----------------------------------------------------------------*/
1255 /* computeSpillable - given a point find the spillable live ranges */
1256 /*-----------------------------------------------------------------*/
1258 computeSpillable (iCode * ic)
1262 debugLog ("%s\n", __FUNCTION__);
1263 /* spillable live ranges are those that are live at this
1264 point . the following categories need to be subtracted
1266 a) - those that are already spilt
1267 b) - if being used by this one
1268 c) - defined by this one */
1270 spillable = bitVectCopy (ic->rlive);
1272 bitVectCplAnd (spillable, _G.spiltSet); /* those already spilt */
1274 bitVectCplAnd (spillable, ic->uses); /* used in this one */
1275 bitVectUnSetBit (spillable, ic->defKey);
1276 spillable = bitVectIntersect (spillable, _G.regAssigned);
1281 /*-----------------------------------------------------------------*/
1282 /* noSpilLoc - return true if a variable has no spil location */
1283 /*-----------------------------------------------------------------*/
1285 noSpilLoc (symbol * sym, eBBlock * ebp, iCode * ic)
1287 debugLog ("%s\n", __FUNCTION__);
1288 return (sym->usl.spillLoc ? 0 : 1);
1291 /*-----------------------------------------------------------------*/
1292 /* hasSpilLoc - will return 1 if the symbol has spil location */
1293 /*-----------------------------------------------------------------*/
1295 hasSpilLoc (symbol * sym, eBBlock * ebp, iCode * ic)
1297 debugLog ("%s\n", __FUNCTION__);
1298 return (sym->usl.spillLoc ? 1 : 0);
1301 /*-----------------------------------------------------------------*/
1302 /* directSpilLoc - will return 1 if the splilocation is in direct */
1303 /*-----------------------------------------------------------------*/
1305 directSpilLoc (symbol * sym, eBBlock * ebp, iCode * ic)
1307 debugLog ("%s\n", __FUNCTION__);
1308 if (sym->usl.spillLoc &&
1309 (IN_DIRSPACE (SPEC_OCLS (sym->usl.spillLoc->etype))))
1315 /*-----------------------------------------------------------------*/
1316 /* hasSpilLocnoUptr - will return 1 if the symbol has spil location */
1317 /* but is not used as a pointer */
1318 /*-----------------------------------------------------------------*/
1320 hasSpilLocnoUptr (symbol * sym, eBBlock * ebp, iCode * ic)
1322 debugLog ("%s\n", __FUNCTION__);
1323 return ((sym->usl.spillLoc && !sym->uptr) ? 1 : 0);
1326 /*-----------------------------------------------------------------*/
1327 /* rematable - will return 1 if the remat flag is set */
1328 /*-----------------------------------------------------------------*/
1330 rematable (symbol * sym, eBBlock * ebp, iCode * ic)
1332 debugLog ("%s\n", __FUNCTION__);
1336 /*-----------------------------------------------------------------*/
1337 /* notUsedInRemaining - not used or defined in remain of the block */
1338 /*-----------------------------------------------------------------*/
1340 notUsedInRemaining (symbol * sym, eBBlock * ebp, iCode * ic)
1342 debugLog ("%s\n", __FUNCTION__);
1343 return ((usedInRemaining (operandFromSymbol (sym), ic) ? 0 : 1) &&
1344 allDefsOutOfRange (sym->defs, ebp->fSeq, ebp->lSeq));
1347 /*-----------------------------------------------------------------*/
1348 /* allLRs - return true for all */
1349 /*-----------------------------------------------------------------*/
1351 allLRs (symbol * sym, eBBlock * ebp, iCode * ic)
1353 debugLog ("%s\n", __FUNCTION__);
1357 /*-----------------------------------------------------------------*/
1358 /* liveRangesWith - applies function to a given set of live range */
1359 /*-----------------------------------------------------------------*/
1361 liveRangesWith (bitVect * lrs, int (func) (symbol *, eBBlock *, iCode *),
1362 eBBlock * ebp, iCode * ic)
1367 debugLog ("%s\n", __FUNCTION__);
1368 if (!lrs || !lrs->size)
1371 for (i = 1; i < lrs->size; i++)
1374 if (!bitVectBitValue (lrs, i))
1377 /* if we don't find it in the live range
1378 hash table we are in serious trouble */
1379 if (!(sym = hTabItemWithKey (liveRanges, i)))
1381 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
1382 "liveRangesWith could not find liveRange");
1386 if (func (sym, ebp, ic) && bitVectBitValue (_G.regAssigned, sym->key))
1387 addSetHead (&rset, sym);
1394 /*-----------------------------------------------------------------*/
1395 /* leastUsedLR - given a set determines which is the least used */
1396 /*-----------------------------------------------------------------*/
1398 leastUsedLR (set * sset)
1400 symbol *sym = NULL, *lsym = NULL;
1402 debugLog ("%s\n", __FUNCTION__);
1403 sym = lsym = setFirstItem (sset);
1408 for (; lsym; lsym = setNextItem (sset))
1411 /* if usage is the same then prefer
1412 the spill the smaller of the two */
1413 if (lsym->used == sym->used)
1414 if (getSize (lsym->type) < getSize (sym->type))
1418 if (lsym->used < sym->used)
1423 setToNull ((void *) &sset);
1428 /*-----------------------------------------------------------------*/
1429 /* noOverLap - will iterate through the list looking for over lap */
1430 /*-----------------------------------------------------------------*/
1432 noOverLap (set * itmpStack, symbol * fsym)
1435 debugLog ("%s\n", __FUNCTION__);
1438 for (sym = setFirstItem (itmpStack); sym;
1439 sym = setNextItem (itmpStack))
1441 if (sym->liveTo > fsym->liveFrom)
1449 /*-----------------------------------------------------------------*/
1450 /* isFree - will return 1 if the a free spil location is found */
1451 /*-----------------------------------------------------------------*/
1456 V_ARG (symbol **, sloc);
1457 V_ARG (symbol *, fsym);
1459 debugLog ("%s\n", __FUNCTION__);
1460 /* if already found */
1464 /* if it is free && and the itmp assigned to
1465 this does not have any overlapping live ranges
1466 with the one currently being assigned and
1467 the size can be accomodated */
1469 noOverLap (sym->usl.itmpStack, fsym) &&
1470 getSize (sym->type) >= getSize (fsym->type))
1479 /*-----------------------------------------------------------------*/
1480 /* spillLRWithPtrReg :- will spil those live ranges which use PTR */
1481 /*-----------------------------------------------------------------*/
1483 spillLRWithPtrReg (symbol * forSym)
1489 debugLog ("%s\n", __FUNCTION__);
1490 if (!_G.regAssigned ||
1491 bitVectIsZero (_G.regAssigned))
1494 r0 = pic16_regWithIdx (R0_IDX);
1495 r1 = pic16_regWithIdx (R1_IDX);
1497 /* for all live ranges */
1498 for (lrsym = hTabFirstItem (liveRanges, &k); lrsym;
1499 lrsym = hTabNextItem (liveRanges, &k))
1503 /* if no registers assigned to it or
1505 /* if it does not overlap with this then
1506 not need to spill it */
1508 if (lrsym->isspilt || !lrsym->nRegs ||
1509 (lrsym->liveTo < forSym->liveFrom))
1512 /* go thru the registers : if it is either
1513 r0 or r1 then spil it */
1514 for (j = 0; j < lrsym->nRegs; j++)
1515 if (lrsym->regs[j] == r0 ||
1516 lrsym->regs[j] == r1)
1525 /*-----------------------------------------------------------------*/
1526 /* createStackSpil - create a location on the stack to spil */
1527 /*-----------------------------------------------------------------*/
1529 createStackSpil (symbol * sym)
1531 symbol *sloc = NULL;
1532 int useXstack, model, noOverlay;
1534 char slocBuffer[30];
1535 debugLog ("%s\n", __FUNCTION__);
1537 /* first go try and find a free one that is already
1538 existing on the stack */
1539 if (applyToSet (_G.stackSpil, isFree, &sloc, sym))
1541 /* found a free one : just update & return */
1542 sym->usl.spillLoc = sloc;
1545 addSetHead (&sloc->usl.itmpStack, sym);
1549 /* could not then have to create one , this is the hard part
1550 we need to allocate this on the stack : this is really a
1551 hack!! but cannot think of anything better at this time */
1553 if (sprintf (slocBuffer, "sloc%d", _G.slocNum++) >= sizeof (slocBuffer))
1555 fprintf (stderr, "kkkInternal error: slocBuffer overflowed: %s:%d\n",
1556 __FILE__, __LINE__);
1560 sloc = newiTemp (slocBuffer);
1562 /* set the type to the spilling symbol */
1563 sloc->type = copyLinkChain (sym->type);
1564 sloc->etype = getSpec (sloc->type);
1565 SPEC_SCLS (sloc->etype) = S_DATA;
1566 SPEC_EXTR (sloc->etype) = 0;
1567 SPEC_STAT (sloc->etype) = 0;
1569 /* we don't allow it to be allocated`
1570 onto the external stack since : so we
1571 temporarily turn it off ; we also
1572 turn off memory model to prevent
1573 the spil from going to the external storage
1574 and turn off overlaying
1577 useXstack = options.useXstack;
1578 model = options.model;
1579 noOverlay = options.noOverlay;
1580 options.noOverlay = 1;
1581 options.model = options.useXstack = 0;
1585 options.useXstack = useXstack;
1586 options.model = model;
1587 options.noOverlay = noOverlay;
1588 sloc->isref = 1; /* to prevent compiler warning */
1590 /* if it is on the stack then update the stack */
1591 if (IN_STACK (sloc->etype))
1593 currFunc->stack += getSize (sloc->type);
1594 _G.stackExtend += getSize (sloc->type);
1597 _G.dataExtend += getSize (sloc->type);
1599 /* add it to the _G.stackSpil set */
1600 addSetHead (&_G.stackSpil, sloc);
1601 sym->usl.spillLoc = sloc;
1604 /* add it to the set of itempStack set
1605 of the spill location */
1606 addSetHead (&sloc->usl.itmpStack, sym);
1610 /*-----------------------------------------------------------------*/
1611 /* isSpiltOnStack - returns true if the spil location is on stack */
1612 /*-----------------------------------------------------------------*/
1614 isSpiltOnStack (symbol * sym)
1618 debugLog ("%s\n", __FUNCTION__);
1625 /* if (sym->_G.stackSpil) */
1628 if (!sym->usl.spillLoc)
1631 etype = getSpec (sym->usl.spillLoc->type);
1632 if (IN_STACK (etype))
1638 /*-----------------------------------------------------------------*/
1639 /* spillThis - spils a specific operand */
1640 /*-----------------------------------------------------------------*/
1642 spillThis (symbol * sym)
1645 debugLog ("%s : %s\n", __FUNCTION__, sym->rname);
1647 /* if this is rematerializable or has a spillLocation
1648 we are okay, else we need to create a spillLocation
1650 if (!(sym->remat || sym->usl.spillLoc))
1651 createStackSpil (sym);
1654 /* mark it has spilt & put it in the spilt set */
1656 _G.spiltSet = bitVectSetBit (_G.spiltSet, sym->key);
1658 bitVectUnSetBit (_G.regAssigned, sym->key);
1660 for (i = 0; i < sym->nRegs; i++)
1664 freeReg (sym->regs[i]);
1665 sym->regs[i] = NULL;
1668 /* if spilt on stack then free up r0 & r1
1669 if they could have been assigned to some
1671 if (!pic16_ptrRegReq && isSpiltOnStack (sym))
1674 spillLRWithPtrReg (sym);
1677 if (sym->usl.spillLoc && !sym->remat)
1678 sym->usl.spillLoc->allocreq = 1;
1682 /*-----------------------------------------------------------------*/
1683 /* selectSpil - select a iTemp to spil : rather a simple procedure */
1684 /*-----------------------------------------------------------------*/
1686 selectSpil (iCode * ic, eBBlock * ebp, symbol * forSym)
1688 bitVect *lrcs = NULL;
1692 debugLog ("%s\n", __FUNCTION__);
1693 /* get the spillable live ranges */
1694 lrcs = computeSpillable (ic);
1696 /* get all live ranges that are rematerizable */
1697 if ((selectS = liveRangesWith (lrcs, rematable, ebp, ic)))
1700 /* return the least used of these */
1701 return leastUsedLR (selectS);
1704 /* get live ranges with spillLocations in direct space */
1705 if ((selectS = liveRangesWith (lrcs, directSpilLoc, ebp, ic)))
1707 sym = leastUsedLR (selectS);
1708 strcpy (sym->rname, (sym->usl.spillLoc->rname[0] ?
1709 sym->usl.spillLoc->rname :
1710 sym->usl.spillLoc->name));
1712 /* mark it as allocation required */
1713 sym->usl.spillLoc->allocreq = 1;
1717 /* if the symbol is local to the block then */
1718 if (forSym->liveTo < ebp->lSeq)
1721 /* check if there are any live ranges allocated
1722 to registers that are not used in this block */
1723 if (!_G.blockSpil && (selectS = liveRangesWith (lrcs, notUsedInBlock, ebp, ic)))
1725 sym = leastUsedLR (selectS);
1726 /* if this is not rematerializable */
1735 /* check if there are any live ranges that not
1736 used in the remainder of the block */
1737 if (!_G.blockSpil && (selectS = liveRangesWith (lrcs, notUsedInRemaining, ebp, ic)))
1739 sym = leastUsedLR (selectS);
1742 sym->remainSpil = 1;
1749 /* find live ranges with spillocation && not used as pointers */
1750 if ((selectS = liveRangesWith (lrcs, hasSpilLocnoUptr, ebp, ic)))
1753 sym = leastUsedLR (selectS);
1754 /* mark this as allocation required */
1755 sym->usl.spillLoc->allocreq = 1;
1759 /* find live ranges with spillocation */
1760 if ((selectS = liveRangesWith (lrcs, hasSpilLoc, ebp, ic)))
1763 sym = leastUsedLR (selectS);
1764 sym->usl.spillLoc->allocreq = 1;
1768 /* couldn't find then we need to create a spil
1769 location on the stack , for which one? the least
1771 if ((selectS = liveRangesWith (lrcs, noSpilLoc, ebp, ic)))
1774 /* return a created spil location */
1775 sym = createStackSpil (leastUsedLR (selectS));
1776 sym->usl.spillLoc->allocreq = 1;
1780 /* this is an extreme situation we will spill
1781 this one : happens very rarely but it does happen */
1787 /*-----------------------------------------------------------------*/
1788 /* spilSomething - spil some variable & mark registers as free */
1789 /*-----------------------------------------------------------------*/
1791 spilSomething (iCode * ic, eBBlock * ebp, symbol * forSym)
1796 debugLog ("%s\n", __FUNCTION__);
1797 /* get something we can spil */
1798 ssym = selectSpil (ic, ebp, forSym);
1800 /* mark it as spilt */
1802 _G.spiltSet = bitVectSetBit (_G.spiltSet, ssym->key);
1804 /* mark it as not register assigned &
1805 take it away from the set */
1806 bitVectUnSetBit (_G.regAssigned, ssym->key);
1808 /* mark the registers as free */
1809 for (i = 0; i < ssym->nRegs; i++)
1811 freeReg (ssym->regs[i]);
1813 /* if spilt on stack then free up r0 & r1
1814 if they could have been assigned to as gprs */
1815 if (!pic16_ptrRegReq && isSpiltOnStack (ssym))
1818 spillLRWithPtrReg (ssym);
1821 /* if this was a block level spil then insert push & pop
1822 at the start & end of block respectively */
1823 if (ssym->blockSpil)
1825 iCode *nic = newiCode (IPUSH, operandFromSymbol (ssym), NULL);
1826 /* add push to the start of the block */
1827 addiCodeToeBBlock (ebp, nic, (ebp->sch->op == LABEL ?
1828 ebp->sch->next : ebp->sch));
1829 nic = newiCode (IPOP, operandFromSymbol (ssym), NULL);
1830 /* add pop to the end of the block */
1831 addiCodeToeBBlock (ebp, nic, NULL);
1834 /* if spilt because not used in the remainder of the
1835 block then add a push before this instruction and
1836 a pop at the end of the block */
1837 if (ssym->remainSpil)
1840 iCode *nic = newiCode (IPUSH, operandFromSymbol (ssym), NULL);
1841 /* add push just before this instruction */
1842 addiCodeToeBBlock (ebp, nic, ic);
1844 nic = newiCode (IPOP, operandFromSymbol (ssym), NULL);
1845 /* add pop to the end of the block */
1846 addiCodeToeBBlock (ebp, nic, NULL);
1855 /*-----------------------------------------------------------------*/
1856 /* getRegPtr - will try for PTR if not a GPR type if not spil */
1857 /*-----------------------------------------------------------------*/
1859 getRegPtr (iCode * ic, eBBlock * ebp, symbol * sym)
1864 debugLog ("%s\n", __FUNCTION__);
1866 /* try for a ptr type */
1867 if ((reg = allocReg (REG_PTR)))
1870 /* try for gpr type */
1871 if ((reg = allocReg (REG_GPR)))
1874 /* we have to spil */
1875 if (!spilSomething (ic, ebp, sym))
1878 /* make sure partially assigned registers aren't reused */
1879 for (j=0; j<=sym->nRegs; j++)
1881 sym->regs[j]->isFree = 0;
1883 /* this looks like an infinite loop but
1884 in really selectSpil will abort */
1888 /*-----------------------------------------------------------------*/
1889 /* getRegGpr - will try for GPR if not spil */
1890 /*-----------------------------------------------------------------*/
1892 getRegGpr (iCode * ic, eBBlock * ebp, symbol * sym)
1897 debugLog ("%s\n", __FUNCTION__);
1899 /* try for gpr type */
1900 if ((reg = allocReg (REG_GPR)))
1903 if (!pic16_ptrRegReq)
1904 if ((reg = allocReg (REG_PTR)))
1907 /* we have to spil */
1908 if (!spilSomething (ic, ebp, sym))
1911 /* make sure partially assigned registers aren't reused */
1912 for (j=0; j<=sym->nRegs; j++)
1914 sym->regs[j]->isFree = 0;
1916 /* this looks like an infinite loop but
1917 in really selectSpil will abort */
1921 /*-----------------------------------------------------------------*/
1922 /* symHasReg - symbol has a given register */
1923 /*-----------------------------------------------------------------*/
1925 symHasReg (symbol * sym, regs * reg)
1929 debugLog ("%s\n", __FUNCTION__);
1930 for (i = 0; i < sym->nRegs; i++)
1931 if (sym->regs[i] == reg)
1937 /*-----------------------------------------------------------------*/
1938 /* deassignLRs - check the live to and if they have registers & are */
1939 /* not spilt then free up the registers */
1940 /*-----------------------------------------------------------------*/
1942 deassignLRs (iCode * ic, eBBlock * ebp)
1948 debugLog ("%s\n", __FUNCTION__);
1949 for (sym = hTabFirstItem (liveRanges, &k); sym;
1950 sym = hTabNextItem (liveRanges, &k))
1953 symbol *psym = NULL;
1954 /* if it does not end here */
1955 if (sym->liveTo > ic->seq)
1958 /* if it was spilt on stack then we can
1959 mark the stack spil location as free */
1964 sym->usl.spillLoc->isFree = 1;
1970 if (!bitVectBitValue (_G.regAssigned, sym->key))
1973 /* special case for shifting: there is a case where shift count
1974 * can be allocated in the same register as the result, so do not
1975 * free right registers if same as result registers, cause genShiftLeft
1976 * will fail -- VR */
1977 if(ic->op == LEFT_OP)
1980 /* special case check if this is an IFX &
1981 the privious one was a pop and the
1982 previous one was not spilt then keep track
1984 if (ic->op == IFX && ic->prev &&
1985 ic->prev->op == IPOP &&
1986 !ic->prev->parmPush &&
1987 !OP_SYMBOL (IC_LEFT (ic->prev))->isspilt)
1988 psym = OP_SYMBOL (IC_LEFT (ic->prev));
1994 bitVectUnSetBit (_G.regAssigned, sym->key);
1996 /* if the result of this one needs registers
1997 and does not have it then assign it right
1999 if (IC_RESULT (ic) &&
2000 !(SKIP_IC2 (ic) || /* not a special icode */
2001 ic->op == JUMPTABLE ||
2006 POINTER_SET (ic)) &&
2007 (result = OP_SYMBOL (IC_RESULT (ic))) && /* has a result */
2008 result->liveTo > ic->seq && /* and will live beyond this */
2009 result->liveTo <= ebp->lSeq && /* does not go beyond this block */
2010 result->liveFrom == ic->seq && /* does not start before here */
2011 result->regType == sym->regType && /* same register types */
2012 result->nRegs && /* which needs registers */
2013 !result->isspilt && /* and does not already have them */
2015 !bitVectBitValue (_G.regAssigned, result->key) &&
2016 /* the number of free regs + number of regs in this LR
2017 can accomodate the what result Needs */
2018 ((nfreeRegsType (result->regType) +
2019 sym->nRegs) >= result->nRegs)
2023 for (i = 0; i < max (sym->nRegs, result->nRegs); i++)
2025 result->regs[i] = sym->regs[i];
2027 result->regs[i] = getRegGpr (ic, ebp, result);
2029 _G.regAssigned = bitVectSetBit (_G.regAssigned, result->key);
2033 /* free the remaining */
2034 for (; i < sym->nRegs; i++)
2038 if (!symHasReg (psym, sym->regs[i]))
2039 freeReg (sym->regs[i]);
2042 freeReg (sym->regs[i]);
2049 /*-----------------------------------------------------------------*/
2050 /* reassignLR - reassign this to registers */
2051 /*-----------------------------------------------------------------*/
2053 reassignLR (operand * op)
2055 symbol *sym = OP_SYMBOL (op);
2058 debugLog ("%s\n", __FUNCTION__);
2059 /* not spilt any more */
2060 sym->isspilt = sym->blockSpil = sym->remainSpil = 0;
2061 bitVectUnSetBit (_G.spiltSet, sym->key);
2063 _G.regAssigned = bitVectSetBit (_G.regAssigned, sym->key);
2067 for (i = 0; i < sym->nRegs; i++)
2068 sym->regs[i]->isFree = 0;
2071 /*-----------------------------------------------------------------*/
2072 /* willCauseSpill - determines if allocating will cause a spill */
2073 /*-----------------------------------------------------------------*/
2075 willCauseSpill (int nr, int rt)
2077 debugLog ("%s\n", __FUNCTION__);
2078 /* first check if there are any avlb registers
2079 of te type required */
2082 /* special case for pointer type
2083 if pointer type not avlb then
2084 check for type gpr */
2085 if (nFreeRegs (rt) >= nr)
2087 if (nFreeRegs (REG_GPR) >= nr)
2092 if (pic16_ptrRegReq)
2094 if (nFreeRegs (rt) >= nr)
2099 if (nFreeRegs (REG_PTR) +
2100 nFreeRegs (REG_GPR) >= nr)
2105 debugLog (" ... yep it will (cause a spill)\n");
2106 /* it will cause a spil */
2110 /*-----------------------------------------------------------------*/
2111 /* positionRegs - the allocator can allocate same registers to res- */
2112 /* ult and operand, if this happens make sure they are in the same */
2113 /* position as the operand otherwise chaos results */
2114 /*-----------------------------------------------------------------*/
2116 positionRegs (symbol * result, symbol * opsym, int lineno)
2118 int count = min (result->nRegs, opsym->nRegs);
2119 int i, j = 0, shared = 0;
2121 debugLog ("%s\n", __FUNCTION__);
2122 /* if the result has been spilt then cannot share */
2127 /* first make sure that they actually share */
2128 for (i = 0; i < count; i++)
2130 for (j = 0; j < count; j++)
2132 if (result->regs[i] == opsym->regs[j] && i != j)
2142 regs *tmp = result->regs[i];
2143 result->regs[i] = result->regs[j];
2144 result->regs[j] = tmp;
2149 /*------------------------------------------------------------------*/
2150 /* verifyRegsAssigned - make sure an iTemp is properly initialized; */
2151 /* it should either have registers or have beed spilled. Otherwise, */
2152 /* there was an uninitialized variable, so just spill this to get */
2153 /* the operand in a valid state. */
2154 /*------------------------------------------------------------------*/
2156 verifyRegsAssigned (operand *op, iCode * ic)
2161 if (!IS_ITEMP (op)) return;
2163 sym = OP_SYMBOL (op);
2164 if (sym->isspilt) return;
2165 if (!sym->nRegs) return;
2166 if (sym->regs[0]) return;
2168 werrorfl (ic->filename, ic->lineno, W_LOCAL_NOINIT,
2169 sym->prereqv ? sym->prereqv->name : sym->name);
2174 /*-----------------------------------------------------------------*/
2175 /* serialRegAssign - serially allocate registers to the variables */
2176 /*-----------------------------------------------------------------*/
2178 serialRegAssign (eBBlock ** ebbs, int count)
2182 debugLog ("%s\n", __FUNCTION__);
2183 /* for all blocks */
2184 for (i = 0; i < count; i++)
2189 if (ebbs[i]->noPath &&
2190 (ebbs[i]->entryLabel != entryLabel &&
2191 ebbs[i]->entryLabel != returnLabel))
2194 /* of all instructions do */
2195 for (ic = ebbs[i]->sch; ic; ic = ic->next)
2198 debugLog (" op: %s\n", decodeOp (ic->op));
2200 if(IC_RESULT(ic) && !IS_ITEMP( IC_RESULT(ic)))
2201 pic16_allocDirReg(IC_RESULT(ic));
2203 if(IC_LEFT(ic) && !IS_ITEMP( IC_LEFT(ic)))
2204 pic16_allocDirReg(IC_LEFT(ic));
2206 if(IC_RIGHT(ic) && !IS_ITEMP( IC_RIGHT(ic)))
2207 pic16_allocDirReg(IC_RIGHT(ic));
2209 /* if this is an ipop that means some live
2210 range will have to be assigned again */
2212 reassignLR (IC_LEFT (ic));
2214 /* if result is present && is a true symbol */
2215 if (IC_RESULT (ic) && ic->op != IFX &&
2216 IS_TRUE_SYMOP (IC_RESULT (ic)))
2217 OP_SYMBOL (IC_RESULT (ic))->allocreq = 1;
2219 /* take away registers from live
2220 ranges that end at this instruction */
2221 deassignLRs (ic, ebbs[i]);
2223 /* some don't need registers */
2224 if (SKIP_IC2 (ic) ||
2225 ic->op == JUMPTABLE ||
2229 (IC_RESULT (ic) && POINTER_SET (ic)))
2232 /* now we need to allocate registers
2233 only for the result */
2236 symbol *sym = OP_SYMBOL (IC_RESULT (ic));
2242 /* if it does not need or is spilt
2243 or is already assigned to registers
2244 or will not live beyond this instructions */
2247 bitVectBitValue (_G.regAssigned, sym->key) ||
2248 sym->liveTo <= ic->seq)
2251 /* if some liverange has been spilt at the block level
2252 and this one live beyond this block then spil this
2254 if (_G.blockSpil && sym->liveTo > ebbs[i]->lSeq)
2259 /* if trying to allocate this will cause
2260 a spill and there is nothing to spill
2261 or this one is rematerializable then
2263 willCS = willCauseSpill (sym->nRegs, sym->regType);
2264 spillable = computeSpillable (ic);
2266 (willCS && bitVectIsZero (spillable)))
2274 /* If the live range preceeds the point of definition
2275 then ideally we must take into account registers that
2276 have been allocated after sym->liveFrom but freed
2277 before ic->seq. This is complicated, so spill this
2278 symbol instead and let fillGaps handle the allocation. */
2279 if (sym->liveFrom < ic->seq)
2285 /* if it has a spillocation & is used less than
2286 all other live ranges then spill this */
2288 if (sym->usl.spillLoc) {
2289 symbol *leastUsed = leastUsedLR (liveRangesWith (spillable,
2290 allLRs, ebbs[i], ic));
2291 if (leastUsed && leastUsed->used > sym->used) {
2296 /* if none of the liveRanges have a spillLocation then better
2297 to spill this one than anything else already assigned to registers */
2298 if (liveRangesWith(spillable,noSpilLoc,ebbs[i],ic)) {
2299 /* if this is local to this block then we might find a block spil */
2300 if (!(sym->liveFrom >= ebbs[i]->fSeq && sym->liveTo <= ebbs[i]->lSeq)) {
2308 if (ic->op == RECEIVE)
2309 debugLog ("When I get clever, I'll optimize the receive logic\n");
2311 /* if we need ptr regs for the right side
2313 if (POINTER_GET (ic) && getSize (OP_SYMBOL (IC_LEFT (ic))->type)
2314 <= (unsigned) PTRSIZE)
2319 /* else we assign registers to it */
2320 _G.regAssigned = bitVectSetBit (_G.regAssigned, sym->key);
2322 debugLog (" %d - nRegs: %d\n", __LINE__, sym->nRegs);
2324 bitVectDebugOn(_G.regAssigned, debugF);
2326 for (j = 0; j < sym->nRegs; j++)
2328 if (sym->regType == REG_PTR)
2329 sym->regs[j] = getRegPtr (ic, ebbs[i], sym);
2331 sym->regs[j] = getRegGpr (ic, ebbs[i], sym);
2333 /* if the allocation falied which means
2334 this was spilt then break */
2338 debugLog (" %d - \n", __LINE__);
2340 /* if it shares registers with operands make sure
2341 that they are in the same position */
2342 if (IC_LEFT (ic) && IS_SYMOP (IC_LEFT (ic)) &&
2343 OP_SYMBOL (IC_LEFT (ic))->nRegs && ic->op != '=')
2344 positionRegs (OP_SYMBOL (IC_RESULT (ic)),
2345 OP_SYMBOL (IC_LEFT (ic)), ic->lineno);
2346 /* do the same for the right operand */
2347 if (IC_RIGHT (ic) && IS_SYMOP (IC_RIGHT (ic)) &&
2348 OP_SYMBOL (IC_RIGHT (ic))->nRegs && ic->op != '=')
2349 positionRegs (OP_SYMBOL (IC_RESULT (ic)),
2350 OP_SYMBOL (IC_RIGHT (ic)), ic->lineno);
2352 debugLog (" %d - \n", __LINE__);
2355 debugLog (" %d - \n", __LINE__);
2364 /* Check for and fix any problems with uninitialized operands */
2365 for (i = 0; i < count; i++)
2369 if (ebbs[i]->noPath &&
2370 (ebbs[i]->entryLabel != entryLabel &&
2371 ebbs[i]->entryLabel != returnLabel))
2374 for (ic = ebbs[i]->sch; ic; ic = ic->next)
2381 verifyRegsAssigned (IC_COND (ic), ic);
2385 if (ic->op == JUMPTABLE)
2387 verifyRegsAssigned (IC_JTCOND (ic), ic);
2391 verifyRegsAssigned (IC_RESULT (ic), ic);
2392 verifyRegsAssigned (IC_LEFT (ic), ic);
2393 verifyRegsAssigned (IC_RIGHT (ic), ic);
2399 /*-----------------------------------------------------------------*/
2400 /* rUmaskForOp :- returns register mask for an operand */
2401 /*-----------------------------------------------------------------*/
2403 rUmaskForOp (operand * op)
2409 debugLog ("%s\n", __FUNCTION__);
2410 /* only temporaries are assigned registers */
2414 sym = OP_SYMBOL (op);
2416 /* if spilt or no registers assigned to it
2418 if (sym->isspilt || !sym->nRegs)
2421 rumask = newBitVect (pic16_nRegs);
2423 for (j = 0; j < sym->nRegs; j++)
2425 rumask = bitVectSetBit (rumask,
2426 sym->regs[j]->rIdx);
2432 /*-----------------------------------------------------------------*/
2433 /* regsUsedIniCode :- returns bit vector of registers used in iCode */
2434 /*-----------------------------------------------------------------*/
2436 regsUsedIniCode (iCode * ic)
2438 bitVect *rmask = newBitVect (pic16_nRegs);
2440 debugLog ("%s\n", __FUNCTION__);
2441 /* do the special cases first */
2444 rmask = bitVectUnion (rmask,
2445 rUmaskForOp (IC_COND (ic)));
2449 /* for the jumptable */
2450 if (ic->op == JUMPTABLE)
2452 rmask = bitVectUnion (rmask,
2453 rUmaskForOp (IC_JTCOND (ic)));
2458 /* of all other cases */
2460 rmask = bitVectUnion (rmask,
2461 rUmaskForOp (IC_LEFT (ic)));
2465 rmask = bitVectUnion (rmask,
2466 rUmaskForOp (IC_RIGHT (ic)));
2469 rmask = bitVectUnion (rmask,
2470 rUmaskForOp (IC_RESULT (ic)));
2476 /*-----------------------------------------------------------------*/
2477 /* createRegMask - for each instruction will determine the regsUsed */
2478 /*-----------------------------------------------------------------*/
2480 createRegMask (eBBlock ** ebbs, int count)
2484 debugLog ("%s\n", __FUNCTION__);
2485 /* for all blocks */
2486 for (i = 0; i < count; i++)
2490 if (ebbs[i]->noPath &&
2491 (ebbs[i]->entryLabel != entryLabel &&
2492 ebbs[i]->entryLabel != returnLabel))
2495 /* for all instructions */
2496 for (ic = ebbs[i]->sch; ic; ic = ic->next)
2501 if (SKIP_IC2 (ic) || !ic->rlive)
2504 /* first mark the registers used in this
2506 ic->rUsed = regsUsedIniCode (ic);
2507 _G.funcrUsed = bitVectUnion (_G.funcrUsed, ic->rUsed);
2509 /* now create the register mask for those
2510 registers that are in use : this is a
2511 super set of ic->rUsed */
2512 ic->rMask = newBitVect (pic16_nRegs + 1);
2514 /* for all live Ranges alive at this point */
2515 for (j = 1; j < ic->rlive->size; j++)
2520 /* if not alive then continue */
2521 if (!bitVectBitValue (ic->rlive, j))
2524 /* find the live range we are interested in */
2525 if (!(sym = hTabItemWithKey (liveRanges, j)))
2527 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
2528 "createRegMask cannot find live range");
2532 /* if no register assigned to it */
2533 if (!sym->nRegs || sym->isspilt)
2536 /* for all the registers allocated to it */
2537 for (k = 0; k < sym->nRegs; k++)
2540 bitVectSetBit (ic->rMask, sym->regs[k]->rIdx);
2546 /*-----------------------------------------------------------------*/
2547 /* rematStr - returns the rematerialized string for a remat var */
2548 /*-----------------------------------------------------------------*/
2550 rematStr (symbol * sym)
2553 iCode *ic = sym->rematiCode;
2554 symbol *psym = NULL;
2556 debugLog ("%s\n", __FUNCTION__);
2558 //printf ("%s\n", s);
2560 /* if plus or minus print the right hand side */
2562 if (ic->op == '+' || ic->op == '-') {
2564 iCode *ric = OP_SYMBOL (IC_LEFT (ic))->rematiCode;
2566 sprintf (s, "(%s %c 0x%04x)",
2567 OP_SYMBOL (IC_LEFT (ric))->rname,
2569 (int) operandLitValue (IC_RIGHT (ic)));
2572 //fprintf(stderr, "ralloc.c:%d OOPS %s\n",__LINE__,s);
2574 psym = newSymbol (OP_SYMBOL (IC_LEFT (ric))->rname, 1);
2575 psym->offset = (int) operandLitValue (IC_RIGHT (ic));
2580 sprintf (s, "%s", OP_SYMBOL (IC_LEFT (ic))->rname);
2581 psym = newSymbol (OP_SYMBOL (IC_LEFT (ic))->rname, 1);
2583 //printf ("ralloc.c:%d %s\n", __LINE__,buffer);
2588 /*-----------------------------------------------------------------*/
2589 /* rematStr - returns the rematerialized string for a remat var */
2590 /*-----------------------------------------------------------------*/
2592 rematStr (symbol * sym)
2595 iCode *ic = sym->rematiCode;
2597 debugLog ("%s\n", __FUNCTION__);
2602 /* if plus or minus print the right hand side */
2604 if (ic->op == '+' || ic->op == '-') {
2605 sprintf(s,"0x%04x %c ",(int) operandLitValue(IC_RIGHT(ic)),
2608 ic = OP_SYMBOL(IC_LEFT(ic))->rematiCode;
2612 if (ic->op == '+' || ic->op == '-')
2614 iCode *ric = OP_SYMBOL (IC_LEFT (ic))->rematiCode;
2615 sprintf (s, "(%s %c 0x%04x)",
2616 OP_SYMBOL (IC_LEFT (ric))->rname,
2618 (int) operandLitValue (IC_RIGHT (ic)));
2621 //ic = OP_SYMBOL(IC_LEFT(ic))->rematiCode;
2623 //fprintf(stderr, "ralloc.c:%d OOPS %s\n",__LINE__,s);
2627 /* we reached the end */
2628 sprintf (s, "%s", OP_SYMBOL (IC_LEFT (ic))->rname);
2632 printf ("%s\n", buffer);
2637 /*-----------------------------------------------------------------*/
2638 /* regTypeNum - computes the type & number of registers required */
2639 /*-----------------------------------------------------------------*/
2647 debugLog ("%s\n", __FUNCTION__);
2648 /* for each live range do */
2649 for (sym = hTabFirstItem (liveRanges, &k); sym;
2650 sym = hTabNextItem (liveRanges, &k)) {
2652 debugLog (" %d - %s\n", __LINE__, sym->rname);
2653 //fprintf(stderr," %d - %s\n", __LINE__, sym->rname);
2655 /* if used zero times then no registers needed */
2656 if ((sym->liveTo - sym->liveFrom) == 0)
2660 /* if the live range is a temporary */
2663 debugLog (" %d - itemp register\n", __LINE__);
2665 /* if the type is marked as a conditional */
2666 if (sym->regType == REG_CND)
2669 /* if used in return only then we don't
2671 if (sym->ruonly || sym->accuse) {
2672 if (IS_AGGREGATE (sym->type) || sym->isptr)
2673 sym->type = aggrToPtr (sym->type, FALSE);
2674 debugLog (" %d - no reg needed - used as a return\n", __LINE__);
2679 /* if the symbol has only one definition &
2680 that definition is a get_pointer and the
2681 pointer we are getting is rematerializable and
2684 if (bitVectnBitsOn (sym->defs) == 1 &&
2685 (ic = hTabItemWithKey (iCodehTab,
2686 bitVectFirstBit (sym->defs))) &&
2688 !IS_BITVAR (sym->etype) &&
2689 (aggrToPtrDclType (operandType (IC_LEFT (ic)), FALSE) == POINTER)) {
2691 if (ptrPseudoSymSafe (sym, ic)) {
2695 debugLog (" %d - \n", __LINE__);
2697 /* create a psuedo symbol & force a spil */
2698 //X symbol *psym = newSymbol (rematStr (OP_SYMBOL (IC_LEFT (ic))), 1);
2699 psym = rematStr (OP_SYMBOL (IC_LEFT (ic)));
2700 psym->type = sym->type;
2701 psym->etype = sym->etype;
2702 psym->psbase = ptrBaseRematSym (OP_SYMBOL (IC_LEFT (ic)));
2703 strcpy (psym->rname, psym->name);
2705 sym->usl.spillLoc = psym;
2709 /* if in data space or idata space then try to
2710 allocate pointer register */
2714 /* if not then we require registers */
2715 sym->nRegs = ((IS_AGGREGATE (sym->type) || sym->isptr) ?
2716 getSize (sym->type = aggrToPtr (sym->type, FALSE)) :
2717 getSize (sym->type));
2721 if(IS_PTR_CONST (sym->type)) {
2723 if(IS_CODEPTR (sym->type)) {
2725 // what IS this ???? (HJD)
2726 debugLog (" %d const pointer type requires %d registers, changing to 3\n",__LINE__,sym->nRegs); // patch 14
2727 sym->nRegs = 3; // patch 14
2730 if (sym->nRegs > 4) {
2731 fprintf (stderr, "allocated more than 4 or 0 registers for type ");
2732 printTypeChain (sym->type, stderr);
2733 fprintf (stderr, "\n");
2736 /* determine the type of register required */
2737 if (sym->nRegs == 1 &&
2738 IS_PTR (sym->type) &&
2740 sym->regType = REG_PTR;
2742 sym->regType = REG_GPR;
2745 debugLog (" reg name %s, reg type %s\n", sym->rname, debugLogRegType (sym->regType));
2749 /* for the first run we don't provide */
2750 /* registers for true symbols we will */
2751 /* see how things go */
2756 static DEFSETFUNC (markRegFree)
2758 ((regs *)item)->isFree = 1;
2763 DEFSETFUNC (pic16_deallocReg)
2765 fprintf(stderr,"deallocting register %s\n",((regs *)item)->name);
2766 ((regs *)item)->isFree = 1;
2767 ((regs *)item)->wasUsed = 0;
2771 /*-----------------------------------------------------------------*/
2772 /* freeAllRegs - mark all registers as free */
2773 /*-----------------------------------------------------------------*/
2775 pic16_freeAllRegs ()
2777 debugLog ("%s\n", __FUNCTION__);
2779 applyToSet(pic16_dynAllocRegs,markRegFree);
2780 applyToSet(pic16_dynStackRegs,markRegFree);
2783 /*-----------------------------------------------------------------*/
2784 /*-----------------------------------------------------------------*/
2786 pic16_deallocateAllRegs ()
2788 debugLog ("%s\n", __FUNCTION__);
2790 applyToSet(pic16_dynAllocRegs,pic16_deallocReg);
2794 /*-----------------------------------------------------------------*/
2795 /* deallocStackSpil - this will set the stack pointer back */
2796 /*-----------------------------------------------------------------*/
2798 DEFSETFUNC (deallocStackSpil)
2802 debugLog ("%s\n", __FUNCTION__);
2807 /*-----------------------------------------------------------------*/
2808 /* farSpacePackable - returns the packable icode for far variables */
2809 /*-----------------------------------------------------------------*/
2811 farSpacePackable (iCode * ic)
2815 debugLog ("%s\n", __FUNCTION__);
2816 /* go thru till we find a definition for the
2817 symbol on the right */
2818 for (dic = ic->prev; dic; dic = dic->prev)
2821 /* if the definition is a call then no */
2822 if ((dic->op == CALL || dic->op == PCALL) &&
2823 IC_RESULT (dic)->key == IC_RIGHT (ic)->key)
2828 /* if shift by unknown amount then not */
2829 if ((dic->op == LEFT_OP || dic->op == RIGHT_OP) &&
2830 IC_RESULT (dic)->key == IC_RIGHT (ic)->key)
2833 /* if pointer get and size > 1 */
2834 if (POINTER_GET (dic) &&
2835 getSize (aggrToPtr (operandType (IC_LEFT (dic)), FALSE)) > 1)
2838 if (POINTER_SET (dic) &&
2839 getSize (aggrToPtr (operandType (IC_RESULT (dic)), FALSE)) > 1)
2842 /* if any three is a true symbol in far space */
2843 if (IC_RESULT (dic) &&
2844 IS_TRUE_SYMOP (IC_RESULT (dic)) &&
2845 isOperandInFarSpace (IC_RESULT (dic)))
2848 if (IC_RIGHT (dic) &&
2849 IS_TRUE_SYMOP (IC_RIGHT (dic)) &&
2850 isOperandInFarSpace (IC_RIGHT (dic)) &&
2851 !isOperandEqual (IC_RIGHT (dic), IC_RESULT (ic)))
2854 if (IC_LEFT (dic) &&
2855 IS_TRUE_SYMOP (IC_LEFT (dic)) &&
2856 isOperandInFarSpace (IC_LEFT (dic)) &&
2857 !isOperandEqual (IC_LEFT (dic), IC_RESULT (ic)))
2860 if (isOperandEqual (IC_RIGHT (ic), IC_RESULT (dic)))
2862 if ((dic->op == LEFT_OP ||
2863 dic->op == RIGHT_OP ||
2865 IS_OP_LITERAL (IC_RIGHT (dic)))
2875 /*-----------------------------------------------------------------*/
2876 /* packRegsForAssign - register reduction for assignment */
2877 /*-----------------------------------------------------------------*/
2879 packRegsForAssign (iCode * ic, eBBlock * ebp)
2884 debugLog ("%d\t%s\n", __LINE__, __FUNCTION__);
2885 debugLog ("ic->op = %s\n", decodeOp( ic->op ) );
2886 debugAopGet (" result:", IC_RESULT (ic));
2887 debugAopGet (" left:", IC_LEFT (ic));
2888 debugAopGet (" right:", IC_RIGHT (ic));
2890 // fprintf(stderr, "%s:%d symbol = %s\n", __FILE__, __LINE__, OP_SYMBOL( IC_RESULT(ic))->name);
2892 debugLog(" %d - actuall processing\n", __LINE__ );
2894 if (!IS_ITEMP (IC_RESULT (ic))) {
2895 pic16_allocDirReg(IC_RESULT (ic));
2896 debugLog (" %d - result is not temp\n", __LINE__);
2900 /* See BUGLOG0001 - VR */
2902 if (!IS_ITEMP (IC_RIGHT (ic))) {
2903 debugLog (" %d - not packing - right is not temp\n", __LINE__);
2904 pic16_allocDirReg(IC_RIGHT (ic));
2909 if (OP_SYMBOL (IC_RIGHT (ic))->isind ||
2910 OP_LIVETO (IC_RIGHT (ic)) > ic->seq)
2912 debugLog (" %d - not packing - right side fails \n", __LINE__);
2916 /* if the true symbol is defined in far space or on stack
2917 then we should not since this will increase register pressure */
2918 if (isOperandInFarSpace (IC_RESULT (ic)))
2920 if ((dic = farSpacePackable (ic)))
2927 /* find the definition of iTempNN scanning backwards if we find a
2928 a use of the true symbol before we find the definition then
2930 for (dic = ic->prev; dic; dic = dic->prev)
2933 /* if there is a function call and this is
2934 a parameter & not my parameter then don't pack it */
2935 if ((dic->op == CALL || dic->op == PCALL) &&
2936 (OP_SYMBOL (IC_RESULT (ic))->_isparm &&
2937 !OP_SYMBOL (IC_RESULT (ic))->ismyparm))
2939 debugLog (" %d - \n", __LINE__);
2948 debugLog("%d\tSearching for iTempNN\n", __LINE__);
2950 if (IS_TRUE_SYMOP (IC_RESULT (dic)) &&
2951 IS_OP_VOLATILE (IC_RESULT (dic)))
2953 debugLog (" %d - dic is VOLATILE \n", __LINE__);
2959 if( IS_SYMOP( IC_RESULT(dic)) &&
2960 IS_BITFIELD( OP_SYMBOL(IC_RESULT(dic))->etype ) ) {
2962 debugLog (" %d - result is bitfield\n", __LINE__);
2968 if (IS_SYMOP (IC_RESULT (dic)) &&
2969 IC_RESULT (dic)->key == IC_RIGHT (ic)->key)
2971 /* A previous result was assigned to the same register - we'll our definition */
2972 debugLog (" %d - dic result key == ic right key -- pointer set=%c\n",
2973 __LINE__, ((POINTER_SET (dic)) ? 'Y' : 'N'));
2974 if (POINTER_SET (dic))
2980 if (IS_SYMOP (IC_RIGHT (dic)) &&
2981 (IC_RIGHT (dic)->key == IC_RESULT (ic)->key ||
2982 IC_RIGHT (dic)->key == IC_RIGHT (ic)->key))
2984 debugLog (" %d - dic right key == ic rightor result key\n", __LINE__);
2989 if (IS_SYMOP (IC_LEFT (dic)) &&
2990 (IC_LEFT (dic)->key == IC_RESULT (ic)->key ||
2991 IC_LEFT (dic)->key == IC_RIGHT (ic)->key))
2993 debugLog (" %d - dic left key == ic rightor result key\n", __LINE__);
2998 if (POINTER_SET (dic) &&
2999 IC_RESULT (dic)->key == IC_RESULT (ic)->key)
3001 debugLog (" %d - dic result key == ic result key -- pointer set=Y\n",
3009 return 0; /* did not find */
3012 /* This code is taken from the hc08 port. Do not know
3013 * if it fits for pic16, but I leave it here just in case */
3015 /* if assignment then check that right is not a bit */
3016 if (ASSIGNMENT (dic) && !POINTER_SET (dic)) {
3017 sym_link *etype = operandType (IC_RIGHT (dic));
3019 if (IS_BITFIELD (etype)) {
3020 /* if result is a bit too then it's ok */
3021 etype = operandType (IC_RESULT (dic));
3022 if (!IS_BITFIELD (etype)) {
3023 debugLog(" %d bitfields\n");
3030 /* if the result is on stack or iaccess then it must be
3031 the same atleast one of the operands */
3032 if (OP_SYMBOL (IC_RESULT (ic))->onStack ||
3033 OP_SYMBOL (IC_RESULT (ic))->iaccess)
3035 /* the operation has only one symbol
3036 operator then we can pack */
3037 if ((IC_LEFT (dic) && !IS_SYMOP (IC_LEFT (dic))) ||
3038 (IC_RIGHT (dic) && !IS_SYMOP (IC_RIGHT (dic))))
3041 if (!((IC_LEFT (dic) &&
3042 IC_RESULT (ic)->key == IC_LEFT (dic)->key) ||
3044 IC_RESULT (ic)->key == IC_RIGHT (dic)->key)))
3048 debugLog (" packing. removing %s\n", OP_SYMBOL (IC_RIGHT (ic))->rname);
3049 debugLog (" replacing with %s\n", OP_SYMBOL (IC_RESULT (dic))->rname);
3050 /* found the definition */
3051 /* replace the result with the result of */
3052 /* this assignment and remove this assignment */
3053 bitVectUnSetBit(OP_SYMBOL(IC_RESULT(dic))->defs,dic->key);
3054 IC_RESULT (dic) = IC_RESULT (ic);
3056 if (IS_ITEMP (IC_RESULT (dic)) && OP_SYMBOL (IC_RESULT (dic))->liveFrom > dic->seq)
3058 OP_SYMBOL (IC_RESULT (dic))->liveFrom = dic->seq;
3060 /* delete from liverange table also
3061 delete from all the points inbetween and the new
3063 for (sic = dic; sic != ic; sic = sic->next)
3065 bitVectUnSetBit (sic->rlive, IC_RESULT (ic)->key);
3066 if (IS_ITEMP (IC_RESULT (dic)))
3067 bitVectSetBit (sic->rlive, IC_RESULT (dic)->key);
3070 remiCodeFromeBBlock (ebp, ic);
3071 bitVectUnSetBit(OP_SYMBOL(IC_RESULT(ic))->defs,ic->key);
3073 debugLog(" %d\n", __LINE__ );
3074 hTabDeleteItem (&iCodehTab, ic->key, ic, DELETE_ITEM, NULL);
3075 OP_DEFS (IC_RESULT (dic)) = bitVectSetBit (OP_DEFS (IC_RESULT (dic)), dic->key);
3083 #define NO_packRegsForAccUse
3084 #define NO_packRegsForSupport
3085 #define NO_packRegsForOneuse
3086 #define NO_cast_peep
3091 #ifndef NO_packRegsForSupport
3092 /*-----------------------------------------------------------------*/
3093 /* findAssignToSym : scanning backwards looks for first assig found */
3094 /*-----------------------------------------------------------------*/
3096 findAssignToSym (operand * op, iCode * ic)
3100 debugLog ("%s\n", __FUNCTION__);
3101 for (dic = ic->prev; dic; dic = dic->prev)
3104 /* if definition by assignment */
3105 if (dic->op == '=' &&
3106 !POINTER_SET (dic) &&
3107 IC_RESULT (dic)->key == op->key
3108 /* && IS_TRUE_SYMOP(IC_RIGHT(dic)) */
3112 /* we are interested only if defined in far space */
3113 /* or in stack space in case of + & - */
3115 /* if assigned to a non-symbol then return
3117 if (!IS_SYMOP (IC_RIGHT (dic)))
3120 /* if the symbol is in far space then
3122 if (isOperandInFarSpace (IC_RIGHT (dic)))
3125 /* for + & - operations make sure that
3126 if it is on the stack it is the same
3127 as one of the three operands */
3128 if ((ic->op == '+' || ic->op == '-') &&
3129 OP_SYMBOL (IC_RIGHT (dic))->onStack)
3131 if (IC_RESULT (ic)->key != IC_RIGHT (dic)->key &&
3132 IC_LEFT (ic)->key != IC_RIGHT (dic)->key &&
3133 IC_RIGHT (ic)->key != IC_RIGHT (dic)->key)
3141 /* if we find an usage then we cannot delete it */
3142 if (IC_LEFT (dic) && IC_LEFT (dic)->key == op->key)
3145 if (IC_RIGHT (dic) && IC_RIGHT (dic)->key == op->key)
3148 if (POINTER_SET (dic) && IC_RESULT (dic)->key == op->key)
3152 /* now make sure that the right side of dic
3153 is not defined between ic & dic */
3156 iCode *sic = dic->next;
3158 for (; sic != ic; sic = sic->next)
3159 if (IC_RESULT (sic) &&
3160 IC_RESULT (sic)->key == IC_RIGHT (dic)->key)
3171 #ifndef NO_packRegsForSupport
3172 /*-----------------------------------------------------------------*/
3173 /* packRegsForSupport :- reduce some registers for support calls */
3174 /*-----------------------------------------------------------------*/
3176 packRegsForSupport (iCode * ic, eBBlock * ebp)
3180 debugLog ("%s\n", __FUNCTION__);
3181 /* for the left & right operand :- look to see if the
3182 left was assigned a true symbol in far space in that
3183 case replace them */
3184 if (IS_ITEMP (IC_LEFT (ic)) &&
3185 OP_SYMBOL (IC_LEFT (ic))->liveTo <= ic->seq)
3187 iCode *dic = findAssignToSym (IC_LEFT (ic), ic);
3193 debugAopGet ("removing left:", IC_LEFT (ic));
3195 /* found it we need to remove it from the
3197 for (sic = dic; sic != ic; sic = sic->next)
3198 bitVectUnSetBit (sic->rlive, IC_LEFT (ic)->key);
3200 IC_LEFT (ic)->operand.symOperand =
3201 IC_RIGHT (dic)->operand.symOperand;
3202 IC_LEFT (ic)->key = IC_RIGHT (dic)->operand.symOperand->key;
3203 remiCodeFromeBBlock (ebp, dic);
3204 bitVectUnSetBit(OP_SYMBOL(IC_RESULT(dic))->defs,dic->key);
3205 hTabDeleteItem (&iCodehTab, dic->key, dic, DELETE_ITEM, NULL);
3209 /* do the same for the right operand */
3212 IS_ITEMP (IC_RIGHT (ic)) &&
3213 OP_SYMBOL (IC_RIGHT (ic))->liveTo <= ic->seq)
3215 iCode *dic = findAssignToSym (IC_RIGHT (ic), ic);
3221 /* if this is a subtraction & the result
3222 is a true symbol in far space then don't pack */
3223 if (ic->op == '-' && IS_TRUE_SYMOP (IC_RESULT (dic)))
3225 sym_link *etype = getSpec (operandType (IC_RESULT (dic)));
3226 if (IN_FARSPACE (SPEC_OCLS (etype)))
3230 debugAopGet ("removing right:", IC_RIGHT (ic));
3232 /* found it we need to remove it from the
3234 for (sic = dic; sic != ic; sic = sic->next)
3235 bitVectUnSetBit (sic->rlive, IC_RIGHT (ic)->key);
3237 IC_RIGHT (ic)->operand.symOperand =
3238 IC_RIGHT (dic)->operand.symOperand;
3239 IC_RIGHT (ic)->key = IC_RIGHT (dic)->operand.symOperand->key;
3241 remiCodeFromeBBlock (ebp, dic);
3242 bitVectUnSetBit(OP_SYMBOL(IC_RESULT(dic))->defs,dic->key);
3243 hTabDeleteItem (&iCodehTab, dic->key, dic, DELETE_ITEM, NULL);
3252 #define IS_OP_RUONLY(x) (x && IS_SYMOP(x) && OP_SYMBOL(x)->ruonly)
3254 #ifndef NO_packRegsForOneuse
3255 /*-----------------------------------------------------------------*/
3256 /* packRegsForOneuse : - will reduce some registers for single Use */
3257 /*-----------------------------------------------------------------*/
3259 packRegsForOneuse (iCode * ic, operand * op, eBBlock * ebp)
3264 debugLog ("%s\n", __FUNCTION__);
3265 /* if returning a literal then do nothing */
3269 /* only upto 2 bytes since we cannot predict
3270 the usage of b, & acc */
3271 if (getSize (operandType (op)) > (pic16_fReturnSizePic - 3) && /* was 2, changed to 3 -- VR */
3276 /* this routine will mark the a symbol as used in one
3277 instruction use only && if the definition is local
3278 (ie. within the basic block) && has only one definition &&
3279 that definition is either a return value from a
3280 function or does not contain any variables in
3282 uses = bitVectCopy (OP_USES (op));
3283 bitVectUnSetBit (uses, ic->key); /* take away this iCode */
3284 if (!bitVectIsZero (uses)) /* has other uses */
3287 /* if it has only one defintion */
3288 if (bitVectnBitsOn (OP_DEFS (op)) > 1)
3289 return NULL; /* has more than one definition */
3291 /* get that definition */
3293 hTabItemWithKey (iCodehTab,
3294 bitVectFirstBit (OP_DEFS (op)))))
3297 /* found the definition now check if it is local */
3298 if (dic->seq < ebp->fSeq ||
3299 dic->seq > ebp->lSeq)
3300 return NULL; /* non-local */
3302 /* now check if it is the return from
3304 if (dic->op == CALL || dic->op == PCALL)
3306 if (ic->op != SEND && ic->op != RETURN &&
3307 !POINTER_SET(ic) && !POINTER_GET(ic))
3309 OP_SYMBOL (op)->ruonly = 1;
3316 /* otherwise check that the definition does
3317 not contain any symbols in far space */
3318 if (isOperandInFarSpace (IC_LEFT (dic)) ||
3319 isOperandInFarSpace (IC_RIGHT (dic)) ||
3320 IS_OP_RUONLY (IC_LEFT (ic)) ||
3321 IS_OP_RUONLY (IC_RIGHT (ic)))
3326 /* if pointer set then make sure the pointer
3328 if (POINTER_SET (dic) &&
3329 !IS_DATA_PTR (aggrToPtr (operandType (IC_RESULT (dic)), FALSE)))
3332 if (POINTER_GET (dic) &&
3333 !IS_DATA_PTR (aggrToPtr (operandType (IC_LEFT (dic)), FALSE)))
3338 /* also make sure the intervenening instructions
3339 don't have any thing in far space */
3340 for (dic = dic->next; dic && dic != ic; dic = dic->next)
3343 /* if there is an intervening function call then no */
3344 if (dic->op == CALL || dic->op == PCALL)
3346 /* if pointer set then make sure the pointer
3348 if (POINTER_SET (dic) &&
3349 !IS_DATA_PTR (aggrToPtr (operandType (IC_RESULT (dic)), FALSE)))
3352 if (POINTER_GET (dic) &&
3353 !IS_DATA_PTR (aggrToPtr (operandType (IC_LEFT (dic)), FALSE)))
3356 /* if address of & the result is remat then okay */
3357 if (dic->op == ADDRESS_OF &&
3358 OP_SYMBOL (IC_RESULT (dic))->remat)
3361 /* if operand has size of three or more & this
3362 operation is a '*','/' or '%' then 'b' may
3364 if ((dic->op == '%' || dic->op == '/' || dic->op == '*') &&
3365 getSize (operandType (op)) >= 3)
3368 /* if left or right or result is in far space */
3369 if (isOperandInFarSpace (IC_LEFT (dic)) ||
3370 isOperandInFarSpace (IC_RIGHT (dic)) ||
3371 isOperandInFarSpace (IC_RESULT (dic)) ||
3372 IS_OP_RUONLY (IC_LEFT (dic)) ||
3373 IS_OP_RUONLY (IC_RIGHT (dic)) ||
3374 IS_OP_RUONLY (IC_RESULT (dic)))
3380 OP_SYMBOL (op)->ruonly = 1;
3387 /*-----------------------------------------------------------------*/
3388 /* isBitwiseOptimizable - requirements of JEAN LOUIS VERN */
3389 /*-----------------------------------------------------------------*/
3391 isBitwiseOptimizable (iCode * ic)
3393 sym_link *ltype = getSpec (operandType (IC_LEFT (ic)));
3394 sym_link *rtype = getSpec (operandType (IC_RIGHT (ic)));
3396 debugLog ("%s\n", __FUNCTION__);
3397 /* bitwise operations are considered optimizable
3398 under the following conditions (Jean-Louis VERN)
3410 if (IS_LITERAL (rtype) ||
3411 (IS_BITVAR (ltype) && IN_BITSPACE (SPEC_OCLS (ltype))))
3418 #ifndef NO_packRegsForAccUse
3420 /*-----------------------------------------------------------------*/
3421 /* packRegsForAccUse - pack registers for acc use */
3422 /*-----------------------------------------------------------------*/
3424 packRegsForAccUse (iCode * ic)
3428 debugLog ("%s\n", __FUNCTION__);
3430 /* if this is an aggregate, e.g. a one byte char array */
3431 if (IS_AGGREGATE(operandType(IC_RESULT(ic)))) {
3434 debugLog (" %s:%d\n", __FUNCTION__,__LINE__);
3436 /* if + or - then it has to be one byte result */
3437 if ((ic->op == '+' || ic->op == '-')
3438 && getSize (operandType (IC_RESULT (ic))) > 1)
3441 debugLog (" %s:%d\n", __FUNCTION__,__LINE__);
3442 /* if shift operation make sure right side is not a literal */
3443 if (ic->op == RIGHT_OP &&
3444 (isOperandLiteral (IC_RIGHT (ic)) ||
3445 getSize (operandType (IC_RESULT (ic))) > 1))
3448 debugLog (" %s:%d\n", __FUNCTION__,__LINE__);
3449 if (ic->op == LEFT_OP &&
3450 (isOperandLiteral (IC_RIGHT (ic)) ||
3451 getSize (operandType (IC_RESULT (ic))) > 1))
3454 debugLog (" %s:%d\n", __FUNCTION__,__LINE__);
3455 if (IS_BITWISE_OP (ic) &&
3456 getSize (operandType (IC_RESULT (ic))) > 1)
3460 debugLog (" %s:%d\n", __FUNCTION__,__LINE__);
3461 /* has only one definition */
3462 if (bitVectnBitsOn (OP_DEFS (IC_RESULT (ic))) > 1)
3465 debugLog (" %s:%d\n", __FUNCTION__,__LINE__);
3466 /* has only one use */
3467 if (bitVectnBitsOn (OP_USES (IC_RESULT (ic))) > 1)
3470 debugLog (" %s:%d\n", __FUNCTION__,__LINE__);
3471 /* and the usage immediately follows this iCode */
3472 if (!(uic = hTabItemWithKey (iCodehTab,
3473 bitVectFirstBit (OP_USES (IC_RESULT (ic))))))
3476 debugLog (" %s:%d\n", __FUNCTION__,__LINE__);
3477 if (ic->next != uic)
3480 /* if it is a conditional branch then we definitely can */
3484 if (uic->op == JUMPTABLE)
3487 /* if the usage is not is an assignment
3488 or an arithmetic / bitwise / shift operation then not */
3489 if (POINTER_SET (uic) &&
3490 getSize (aggrToPtr (operandType (IC_RESULT (uic)), FALSE)) > 1)
3493 debugLog (" %s:%d\n", __FUNCTION__,__LINE__);
3494 if (uic->op != '=' &&
3495 !IS_ARITHMETIC_OP (uic) &&
3496 !IS_BITWISE_OP (uic) &&
3497 uic->op != LEFT_OP &&
3498 uic->op != RIGHT_OP)
3501 debugLog (" %s:%d\n", __FUNCTION__,__LINE__);
3502 /* if used in ^ operation then make sure right is not a
3504 if (uic->op == '^' && isOperandLiteral (IC_RIGHT (uic)))
3507 /* if shift operation make sure right side is not a literal */
3508 if (uic->op == RIGHT_OP &&
3509 (isOperandLiteral (IC_RIGHT (uic)) ||
3510 getSize (operandType (IC_RESULT (uic))) > 1))
3513 if (uic->op == LEFT_OP &&
3514 (isOperandLiteral (IC_RIGHT (uic)) ||
3515 getSize (operandType (IC_RESULT (uic))) > 1))
3518 /* make sure that the result of this icode is not on the
3519 stack, since acc is used to compute stack offset */
3520 if (IS_TRUE_SYMOP (IC_RESULT (uic)) &&
3521 OP_SYMBOL (IC_RESULT (uic))->onStack)
3524 /* if either one of them in far space then we cannot */
3525 if ((IS_TRUE_SYMOP (IC_LEFT (uic)) &&
3526 isOperandInFarSpace (IC_LEFT (uic))) ||
3527 (IS_TRUE_SYMOP (IC_RIGHT (uic)) &&
3528 isOperandInFarSpace (IC_RIGHT (uic))))
3531 /* if the usage has only one operand then we can */
3532 if (IC_LEFT (uic) == NULL ||
3533 IC_RIGHT (uic) == NULL)
3536 /* make sure this is on the left side if not
3537 a '+' since '+' is commutative */
3538 if (ic->op != '+' &&
3539 IC_LEFT (uic)->key != IC_RESULT (ic)->key)
3543 debugLog (" %s:%d\n", __FUNCTION__,__LINE__);
3544 /* if one of them is a literal then we can */
3545 if ( ((IC_LEFT (uic) && IS_OP_LITERAL (IC_LEFT (uic))) ||
3546 (IC_RIGHT (uic) && IS_OP_LITERAL (IC_RIGHT (uic)))) &&
3547 (getSize (operandType (IC_RESULT (uic))) <= 1))
3549 OP_SYMBOL (IC_RESULT (ic))->accuse = 1;
3554 debugLog (" %s:%d\n", __FUNCTION__,__LINE__);
3555 /* if the other one is not on stack then we can */
3556 if (IC_LEFT (uic)->key == IC_RESULT (ic)->key &&
3557 (IS_ITEMP (IC_RIGHT (uic)) ||
3558 (IS_TRUE_SYMOP (IC_RIGHT (uic)) &&
3559 !OP_SYMBOL (IC_RIGHT (uic))->onStack)))
3562 if (IC_RIGHT (uic)->key == IC_RESULT (ic)->key &&
3563 (IS_ITEMP (IC_LEFT (uic)) ||
3564 (IS_TRUE_SYMOP (IC_LEFT (uic)) &&
3565 !OP_SYMBOL (IC_LEFT (uic))->onStack)))
3571 debugLog ("%s - Yes we are using the accumulator\n", __FUNCTION__);
3572 OP_SYMBOL (IC_RESULT (ic))->accuse = 1;
3579 /*-----------------------------------------------------------------*/
3580 /* packForPush - hueristics to reduce iCode for pushing */
3581 /*-----------------------------------------------------------------*/
3583 packForReceive (iCode * ic, eBBlock * ebp)
3587 debugLog ("%s\n", __FUNCTION__);
3588 debugAopGet (" result:", IC_RESULT (ic));
3589 debugAopGet (" left:", IC_LEFT (ic));
3590 debugAopGet (" right:", IC_RIGHT (ic));
3595 for (dic = ic->next; dic; dic = dic->next)
3600 if (IC_LEFT (dic) && (IC_RESULT (ic)->key == IC_LEFT (dic)->key))
3601 debugLog (" used on left\n");
3602 if (IC_RIGHT (dic) && IC_RESULT (ic)->key == IC_RIGHT (dic)->key)
3603 debugLog (" used on right\n");
3604 if (IC_RESULT (dic) && IC_RESULT (ic)->key == IC_RESULT (dic)->key)
3605 debugLog (" used on result\n");
3607 if ((IC_LEFT (dic) && (IC_RESULT (ic)->key == IC_LEFT (dic)->key)) ||
3608 (IC_RESULT (dic) && IC_RESULT (ic)->key == IC_RESULT (dic)->key))
3613 debugLog (" hey we can remove this unnecessary assign\n");
3615 /*-----------------------------------------------------------------*/
3616 /* packForPush - hueristics to reduce iCode for pushing */
3617 /*-----------------------------------------------------------------*/
3619 packForPush (iCode * ic, eBBlock * ebp)
3623 debugLog ("%s\n", __FUNCTION__);
3624 if (ic->op != IPUSH || !IS_ITEMP (IC_LEFT (ic)))
3627 /* must have only definition & one usage */
3628 if (bitVectnBitsOn (OP_DEFS (IC_LEFT (ic))) != 1 ||
3629 bitVectnBitsOn (OP_USES (IC_LEFT (ic))) != 1)
3632 /* find the definition */
3633 if (!(dic = hTabItemWithKey (iCodehTab,
3634 bitVectFirstBit (OP_DEFS (IC_LEFT (ic))))))
3637 if (dic->op != '=' || POINTER_SET (dic))
3640 /* we now we know that it has one & only one def & use
3641 and the that the definition is an assignment */
3642 IC_LEFT (ic) = IC_RIGHT (dic);
3644 remiCodeFromeBBlock (ebp, dic);
3645 bitVectUnSetBit(OP_SYMBOL(IC_RESULT(dic))->defs,dic->key);
3646 hTabDeleteItem (&iCodehTab, dic->key, dic, DELETE_ITEM, NULL);
3649 static void printSymType(char * str, sym_link *sl)
3651 if(!pic16_ralloc_debug)return;
3653 debugLog (" %s Symbol type: ",str);
3654 printTypeChain( sl, debugF);
3658 /*-----------------------------------------------------------------*/
3659 /* some debug code to print the symbol S_TYPE. Note that
3660 * the function checkSClass in src/SDCCsymt.c dinks with
3661 * the S_TYPE in ways the PIC port doesn't fully like...*/
3662 /*-----------------------------------------------------------------*/
3663 static void isData(sym_link *sl)
3667 if(!pic16_ralloc_debug)return;
3674 for ( ; sl; sl=sl->next) {
3676 switch (SPEC_SCLS(sl)) {
3677 case S_DATA: fprintf (of, "data "); break;
3678 case S_XDATA: fprintf (of, "xdata "); break;
3679 case S_SFR: fprintf (of, "sfr "); break;
3680 case S_SBIT: fprintf (of, "sbit "); break;
3681 case S_CODE: fprintf (of, "code "); break;
3682 case S_IDATA: fprintf (of, "idata "); break;
3683 case S_PDATA: fprintf (of, "pdata "); break;
3684 case S_LITERAL: fprintf (of, "literal "); break;
3685 case S_STACK: fprintf (of, "stack "); break;
3686 case S_XSTACK: fprintf (of, "xstack "); break;
3687 case S_BIT: fprintf (of, "bit "); break;
3688 case S_EEPROM: fprintf (of, "eeprom "); break;
3697 /*--------------------------------------------------------------------*/
3698 /* pic16_packRegisters - does some transformations to reduce */
3699 /* register pressure */
3701 /*--------------------------------------------------------------------*/
3703 pic16_packRegisters (eBBlock * ebp)
3708 debugLog ("%s\n", __FUNCTION__);
3714 /* look for assignments of the form */
3715 /* iTempNN = TRueSym (someoperation) SomeOperand */
3717 /* TrueSym := iTempNN:1 */
3718 for (ic = ebp->sch; ic; ic = ic->next)
3720 // debugLog("%d\n", __LINE__);
3721 /* find assignment of the form TrueSym := iTempNN:1 */
3722 /* see BUGLOG0001 for workaround with the CAST - VR */
3723 // if ( (ic->op == '=' || ic->op == CAST) && !POINTER_SET (ic) ) // patch 11
3724 if ( (ic->op == '=') && !POINTER_SET (ic) ) // patch 11
3725 change += packRegsForAssign (ic, ebp);
3729 if (POINTER_SET (ic))
3730 debugLog ("pointer is set\n");
3731 debugAopGet (" result:", IC_RESULT (ic));
3732 debugAopGet (" left:", IC_LEFT (ic));
3733 debugAopGet (" right:", IC_RIGHT (ic));
3742 for (ic = ebp->sch; ic; ic = ic->next) {
3744 if(IS_SYMOP ( IC_LEFT(ic))) {
3745 sym_link *etype = getSpec (operandType (IC_LEFT (ic)));
3747 debugAopGet ("x left:", IC_LEFT (ic));
3749 if(IS_PTR_CONST(OP_SYMBOL(IC_LEFT(ic))->type))
3751 if(IS_CODEPTR(OP_SYMBOL(IC_LEFT(ic))->type))
3753 debugLog (" is a pointer\n");
3755 if(IS_PTR(OP_SYMBOL(IC_LEFT(ic))->type))
3756 debugLog (" is a ptr\n");
3758 if(IS_OP_VOLATILE(IC_LEFT(ic)))
3759 debugLog (" is volatile\n");
3763 if(IS_OP_VOLATILE(IC_LEFT(ic))) {
3764 debugLog (" %d - left is not temp, allocating\n", __LINE__);
3765 pic16_allocDirReg(IC_LEFT (ic));
3768 printSymType("c ", OP_SYMBOL(IC_LEFT(ic))->type);
3771 if(IS_SYMOP ( IC_RIGHT(ic))) {
3772 debugAopGet (" right:", IC_RIGHT (ic));
3773 printSymType(" ", OP_SYMBOL(IC_RIGHT(ic))->type);
3776 if(IS_SYMOP ( IC_RESULT(ic))) {
3777 debugAopGet (" result:", IC_RESULT (ic));
3778 printSymType(" ", OP_SYMBOL(IC_RESULT(ic))->type);
3781 if(IS_TRUE_SYMOP ( IC_RIGHT(ic))) {
3782 debugAopGet (" right:", IC_RIGHT (ic));
3783 printSymType(" ", OP_SYMBOL(IC_RIGHT(ic))->type);
3784 // pic16_allocDirReg(IC_RIGHT(ic));
3787 if(IS_TRUE_SYMOP ( IC_RESULT(ic))) {
3788 debugAopGet (" result:", IC_RESULT (ic));
3789 printSymType(" ", OP_SYMBOL(IC_RESULT(ic))->type);
3790 // pic16_allocDirReg(IC_RESULT(ic));
3794 if (POINTER_SET (ic))
3795 debugLog (" %d - Pointer set\n", __LINE__);
3798 /* if this is an itemp & result of a address of a true sym
3799 then mark this as rematerialisable */
3800 if (ic->op == ADDRESS_OF &&
3801 IS_ITEMP (IC_RESULT (ic)) &&
3802 IS_TRUE_SYMOP (IC_LEFT (ic)) &&
3803 bitVectnBitsOn (OP_DEFS (IC_RESULT (ic))) == 1 &&
3804 !OP_SYMBOL (IC_LEFT (ic))->onStack)
3807 debugLog (" %d - %s. result is rematerializable\n", __LINE__,__FUNCTION__);
3809 OP_SYMBOL (IC_RESULT (ic))->remat = 1;
3810 OP_SYMBOL (IC_RESULT (ic))->rematiCode = ic;
3811 OP_SYMBOL (IC_RESULT (ic))->usl.spillLoc = NULL;
3815 /* if straight assignment then carry remat flag if
3816 this is the only definition */
3817 if (ic->op == '=' &&
3818 !POINTER_SET (ic) &&
3819 IS_SYMOP (IC_RIGHT (ic)) &&
3820 OP_SYMBOL (IC_RIGHT (ic))->remat &&
3821 bitVectnBitsOn (OP_SYMBOL (IC_RESULT (ic))->defs) <= 1)
3823 debugLog (" %d - %s. straight rematerializable\n", __LINE__,__FUNCTION__);
3825 OP_SYMBOL (IC_RESULT (ic))->remat =
3826 OP_SYMBOL (IC_RIGHT (ic))->remat;
3827 OP_SYMBOL (IC_RESULT (ic))->rematiCode =
3828 OP_SYMBOL (IC_RIGHT (ic))->rematiCode;
3831 /* if this is a +/- operation with a rematerizable
3832 then mark this as rematerializable as well */
3833 if ((ic->op == '+' || ic->op == '-') &&
3834 (IS_SYMOP (IC_LEFT (ic)) &&
3835 IS_ITEMP (IC_RESULT (ic)) &&
3836 OP_SYMBOL (IC_LEFT (ic))->remat &&
3837 bitVectnBitsOn (OP_DEFS (IC_RESULT (ic))) == 1 &&
3838 IS_OP_LITERAL (IC_RIGHT (ic))))
3840 debugLog (" %d - %s. rematerializable because op is +/-\n", __LINE__,__FUNCTION__);
3842 operandLitValue (IC_RIGHT (ic));
3843 OP_SYMBOL (IC_RESULT (ic))->remat = 1;
3844 OP_SYMBOL (IC_RESULT (ic))->rematiCode = ic;
3845 OP_SYMBOL (IC_RESULT (ic))->usl.spillLoc = NULL;
3848 /* mark the pointer usages */
3849 if (POINTER_SET (ic))
3851 OP_SYMBOL (IC_RESULT (ic))->uptr = 1;
3852 debugLog (" marking as a pointer (set) =>");
3853 debugAopGet (" result:", IC_RESULT (ic));
3855 if (POINTER_GET (ic))
3857 OP_SYMBOL (IC_LEFT (ic))->uptr = 1;
3858 debugLog (" marking as a pointer (get) =>");
3859 debugAopGet (" left:", IC_LEFT (ic));
3862 //debugLog(" %d %s\n", __LINE__, __FUNCTION__);
3866 //debugLog(" %d %s\n", __LINE__, __FUNCTION__ );
3867 /* if we are using a symbol on the stack
3868 then we should say pic16_ptrRegReq */
3869 if (ic->op == IFX && IS_SYMOP (IC_COND (ic)))
3870 pic16_ptrRegReq += ((OP_SYMBOL (IC_COND (ic))->onStack ||
3871 OP_SYMBOL (IC_COND (ic))->iaccess) ? 1 : 0);
3872 else if (ic->op == JUMPTABLE && IS_SYMOP (IC_JTCOND (ic)))
3873 pic16_ptrRegReq += ((OP_SYMBOL (IC_JTCOND (ic))->onStack ||
3874 OP_SYMBOL (IC_JTCOND (ic))->iaccess) ? 1 : 0);
3878 //debugLog(" %d %s\n", __LINE__, __FUNCTION__ );
3879 if (IS_SYMOP (IC_LEFT (ic)))
3880 pic16_ptrRegReq += ((OP_SYMBOL (IC_LEFT (ic))->onStack ||
3881 OP_SYMBOL (IC_LEFT (ic))->iaccess) ? 1 : 0);
3882 if (IS_SYMOP (IC_RIGHT (ic)))
3883 pic16_ptrRegReq += ((OP_SYMBOL (IC_RIGHT (ic))->onStack ||
3884 OP_SYMBOL (IC_RIGHT (ic))->iaccess) ? 1 : 0);
3885 if (IS_SYMOP (IC_RESULT (ic)))
3886 pic16_ptrRegReq += ((OP_SYMBOL (IC_RESULT (ic))->onStack ||
3887 OP_SYMBOL (IC_RESULT (ic))->iaccess) ? 1 : 0);
3890 debugLog (" %d - pointer reg req = %d\n", __LINE__,pic16_ptrRegReq);
3894 /* if the condition of an if instruction
3895 is defined in the previous instruction then
3896 mark the itemp as a conditional */
3897 if ((IS_CONDITIONAL (ic) ||
3898 ((ic->op == BITWISEAND ||
3901 isBitwiseOptimizable (ic))) &&
3902 ic->next && ic->next->op == IFX &&
3903 isOperandEqual (IC_RESULT (ic), IC_COND (ic->next)) &&
3904 OP_SYMBOL (IC_RESULT (ic))->liveTo <= ic->next->seq)
3907 debugLog (" %d\n", __LINE__);
3908 OP_SYMBOL (IC_RESULT (ic))->regType = REG_CND;
3912 debugLog(" %d\n", __LINE__);
3914 #ifndef NO_packRegsForSupport
3915 /* reduce for support function calls */
3916 if (ic->supportRtn || ic->op == '+' || ic->op == '-')
3917 packRegsForSupport (ic, ebp);
3920 /* if a parameter is passed, it's in W, so we may not
3921 need to place a copy in a register */
3922 if (ic->op == RECEIVE)
3923 packForReceive (ic, ebp);
3925 #ifndef NO_packRegsForOneuse
3926 /* some cases the redundant moves can
3927 can be eliminated for return statements */
3928 if ((ic->op == RETURN || ic->op == SEND) &&
3929 !isOperandInFarSpace (IC_LEFT (ic)) &&
3931 packRegsForOneuse (ic, IC_LEFT (ic), ebp);
3934 #ifndef NO_packRegsForOneuse
3935 /* if pointer set & left has a size more than
3936 one and right is not in far space */
3937 if (POINTER_SET (ic) &&
3938 !isOperandInFarSpace (IC_RIGHT (ic)) &&
3939 !OP_SYMBOL (IC_RESULT (ic))->remat &&
3940 !IS_OP_RUONLY (IC_RIGHT (ic)) &&
3941 getSize (aggrToPtr (operandType (IC_RESULT (ic)), FALSE)) > 1)
3943 packRegsForOneuse (ic, IC_RESULT (ic), ebp);
3946 #ifndef NO_packRegsForOneuse
3947 /* if pointer get */
3948 if (POINTER_GET (ic) &&
3949 !isOperandInFarSpace (IC_RESULT (ic)) &&
3950 !OP_SYMBOL (IC_LEFT (ic))->remat &&
3951 !IS_OP_RUONLY (IC_RESULT (ic)) &&
3952 getSize (aggrToPtr (operandType (IC_LEFT (ic)), FALSE)) > 1)
3954 packRegsForOneuse (ic, IC_LEFT (ic), ebp);
3955 debugLog("%d - return from packRegsForOneuse\n", __LINE__);
3958 #ifndef NO_cast_peep
3959 /* if this is cast for intergral promotion then
3960 check if only use of the definition of the
3961 operand being casted/ if yes then replace
3962 the result of that arithmetic operation with
3963 this result and get rid of the cast */
3964 if (ic->op == CAST) {
3966 sym_link *fromType = operandType (IC_RIGHT (ic));
3967 sym_link *toType = operandType (IC_LEFT (ic));
3969 debugLog (" %d - casting\n", __LINE__);
3971 if (IS_INTEGRAL (fromType) && IS_INTEGRAL (toType) &&
3972 getSize (fromType) != getSize (toType)) {
3975 iCode *dic = packRegsForOneuse (ic, IC_RIGHT (ic), ebp);
3978 if (IS_ARITHMETIC_OP (dic)) {
3979 debugLog(" %d %s\n", __LINE__, __FUNCTION__ );
3981 bitVectUnSetBit(OP_SYMBOL(IC_RESULT(dic))->defs,dic->key);
3982 IC_RESULT (dic) = IC_RESULT (ic);
3983 remiCodeFromeBBlock (ebp, ic);
3984 bitVectUnSetBit(OP_SYMBOL(IC_RESULT(ic))->defs,ic->key);
3985 hTabDeleteItem (&iCodehTab, ic->key, ic, DELETE_ITEM, NULL);
3986 OP_DEFS (IC_RESULT (dic)) = bitVectSetBit (OP_DEFS (IC_RESULT (dic)), dic->key);
3990 OP_SYMBOL (IC_RIGHT (ic))->ruonly = 0;
3994 /* if the type from and type to are the same
3995 then if this is the only use then packit */
3996 if (compareType (operandType (IC_RIGHT (ic)),
3997 operandType (IC_LEFT (ic))) == 1) {
3999 iCode *dic = packRegsForOneuse (ic, IC_RIGHT (ic), ebp);
4002 debugLog(" %d\n", __LINE__);
4004 bitVectUnSetBit(OP_SYMBOL(IC_RESULT(dic))->defs,dic->key);
4005 IC_RESULT (dic) = IC_RESULT (ic);
4006 bitVectUnSetBit(OP_SYMBOL(IC_RESULT(ic))->defs,ic->key);
4007 remiCodeFromeBBlock (ebp, ic);
4008 hTabDeleteItem (&iCodehTab, ic->key, ic, DELETE_ITEM, NULL);
4009 OP_DEFS (IC_RESULT (dic)) = bitVectSetBit (OP_DEFS (IC_RESULT (dic)), dic->key);
4017 iTempNN := (some variable in farspace) V1
4022 if (ic->op == IPUSH)
4024 packForPush (ic, ebp);
4028 #ifndef NO_packRegsForAccUse
4029 /* pack registers for accumulator use, when the
4030 result of an arithmetic or bit wise operation
4031 has only one use, that use is immediately following
4032 the defintion and the using iCode has only one
4033 operand or has two operands but one is literal &
4034 the result of that operation is not on stack then
4035 we can leave the result of this operation in acc:b
4037 if ((IS_ARITHMETIC_OP (ic)
4039 || IS_BITWISE_OP (ic)
4041 || ic->op == LEFT_OP || ic->op == RIGHT_OP
4044 IS_ITEMP (IC_RESULT (ic)) &&
4045 getSize (operandType (IC_RESULT (ic))) <= 1)
4047 packRegsForAccUse (ic);
4054 dumpEbbsToDebug (eBBlock ** ebbs, int count)
4058 if (!pic16_ralloc_debug || !debugF)
4061 for (i = 0; i < count; i++)
4063 fprintf (debugF, "\n----------------------------------------------------------------\n");
4064 fprintf (debugF, "Basic Block %s : loop Depth = %d noPath = %d , lastinLoop = %d\n",
4065 ebbs[i]->entryLabel->name,
4068 ebbs[i]->isLastInLoop);
4069 fprintf (debugF, "depth 1st num %d : bbnum = %d 1st iCode = %d , last iCode = %d\n",
4074 fprintf (debugF, "visited %d : hasFcall = %d\n",
4078 fprintf (debugF, "\ndefines bitVector :");
4079 bitVectDebugOn (ebbs[i]->defSet, debugF);
4080 fprintf (debugF, "\nlocal defines bitVector :");
4081 bitVectDebugOn (ebbs[i]->ldefs, debugF);
4082 fprintf (debugF, "\npointers Set bitvector :");
4083 bitVectDebugOn (ebbs[i]->ptrsSet, debugF);
4084 fprintf (debugF, "\nin pointers Set bitvector :");
4085 bitVectDebugOn (ebbs[i]->inPtrsSet, debugF);
4086 fprintf (debugF, "\ninDefs Set bitvector :");
4087 bitVectDebugOn (ebbs[i]->inDefs, debugF);
4088 fprintf (debugF, "\noutDefs Set bitvector :");
4089 bitVectDebugOn (ebbs[i]->outDefs, debugF);
4090 fprintf (debugF, "\nusesDefs Set bitvector :");
4091 bitVectDebugOn (ebbs[i]->usesDefs, debugF);
4092 fprintf (debugF, "\n----------------------------------------------------------------\n");
4093 printiCChain (ebbs[i]->sch, debugF);
4096 /*-----------------------------------------------------------------*/
4097 /* pic16_assignRegisters - assigns registers to each live range as need */
4098 /*-----------------------------------------------------------------*/
4100 pic16_assignRegisters (eBBlock ** ebbs, int count)
4105 debugLog ("<><><><><><><><><><><><><><><><><>\nstarting\t%s:%s", __FILE__, __FUNCTION__);
4106 debugLog ("\nebbs before optimizing:\n");
4107 dumpEbbsToDebug (ebbs, count);
4109 setToNull ((void *) &_G.funcrUsed);
4110 pic16_ptrRegReq = _G.stackExtend = _G.dataExtend = 0;
4113 /* change assignments this will remove some
4114 live ranges reducing some register pressure */
4115 for (i = 0; i < count; i++)
4116 pic16_packRegisters (ebbs[i]);
4123 debugLog("dir registers allocated so far:\n");
4124 reg = hTabFirstItem(dynDirectRegNames, &hkey);
4127 debugLog(" -- #%d reg = %s key %d, rIdx = %d, size %d\n",i++,reg->name,hkey, reg->rIdx,reg->size);
4128 // fprintf(stderr, " -- #%d reg = %s key %d, rIdx = %d, size %d\n",i++,reg->name,hkey, reg->rIdx,reg->size);
4129 reg = hTabNextItem(dynDirectRegNames, &hkey);
4134 /* liveranges probably changed by register packing
4135 so we compute them again */
4136 recomputeLiveRanges (ebbs, count);
4138 if (options.dump_pack)
4139 dumpEbbsToFileExt (DUMP_PACK, ebbs, count);
4141 /* first determine for each live range the number of
4142 registers & the type of registers required for each */
4145 /* and serially allocate registers */
4146 serialRegAssign (ebbs, count);
4148 // debugLog ("ebbs after serialRegAssign:\n");
4149 // dumpEbbsToDebug (ebbs, count);
4152 //pic16_freeAllRegs();
4154 /* if stack was extended then tell the user */
4157 /* werror(W_TOOMANY_SPILS,"stack", */
4158 /* _G.stackExtend,currFunc->name,""); */
4164 /* werror(W_TOOMANY_SPILS,"data space", */
4165 /* _G.dataExtend,currFunc->name,""); */
4169 /* after that create the register mask
4170 for each of the instruction */
4171 createRegMask (ebbs, count);
4173 /* redo that offsets for stacked automatic variables */
4174 redoStackOffsets ();
4176 if (options.dump_rassgn)
4177 dumpEbbsToFileExt (DUMP_RASSGN, ebbs, count);
4179 /* now get back the chain */
4180 ic = iCodeLabelOptimize (iCodeFromeBBlock (ebbs, count));
4182 debugLog ("ebbs after optimizing:\n");
4183 dumpEbbsToDebug (ebbs, count);
4188 /* free up any _G.stackSpil locations allocated */
4189 applyToSet (_G.stackSpil, deallocStackSpil);
4191 setToNull ((void *) &_G.stackSpil);
4192 setToNull ((void *) &_G.spiltSet);
4193 /* mark all registers as free */
4194 pic16_freeAllRegs ();
4196 debugLog ("leaving\n<><><><><><><><><><><><><><><><><>\n");