1 /*-----------------------------------------------------------------*/
2 /* SDCCmem.c - 8051 memory management routines */
3 /*-----------------------------------------------------------------*/
8 memmap *xstack = NULL; /* xternal stack data */
9 memmap *istack = NULL; /* internal stack */
10 memmap *code = NULL; /* code segment */
11 memmap *data = NULL; /* internal data upto 128 */
12 memmap *pdata = NULL; /* paged external data */
13 memmap *xdata = NULL; /* external data */
14 memmap *xidata = NULL; /* the initialized xdata */
15 memmap *xinit = NULL; /* the initializers for xidata */
16 memmap *idata = NULL; /* internal data upto 256 */
17 memmap *bit = NULL; /* bit addressable space */
18 memmap *statsg = NULL; /* the constant data segment */
19 memmap *sfr = NULL; /* register space */
20 memmap *reg = NULL; /* register space */
21 memmap *sfrbit = NULL; /* sfr bit space */
22 memmap *generic = NULL; /* is a generic pointer */
23 memmap *overlay = NULL; /* overlay segment */
24 memmap *eeprom = NULL; /* eeprom location */
25 memmap *home = NULL; /* Unswitchable code bank */
27 /* this is a set of sets each set containing
28 symbols in a single overlay */
29 set *ovrSetSets = NULL;
32 int fatalError = 0; /* fatal error flag */
34 /*-----------------------------------------------------------------*/
35 /* allocMap - allocates a memory map */
36 /*-----------------------------------------------------------------*/
38 allocMap (char rspace, /* sfr space */
39 char farmap, /* far or near segment */
40 char paged, /* can this segment be paged */
41 char direct, /* directly addressable */
42 char bitaddr, /* bit addressable space */
43 char codemap, /* this is code space */
44 unsigned sloc, /* starting location */
45 const char *name, /* 2 character name */
46 char dbName, /* debug name */
47 int ptrType /* pointer type for this space */
52 if (!(map = Safe_alloc (sizeof (memmap))))
54 werror (E_OUT_OF_MEM, __FILE__, sizeof (memmap));
58 memset (map, ZERO, sizeof (memmap));
64 map->codesp = codemap;
68 map->ptrType = ptrType;
69 if (!(map->oFile = tempfile ()))
71 werror (E_TMPFILE_FAILED);
74 addSetHead (&tmpfileSet, map->oFile);
79 /*-----------------------------------------------------------------*/
80 /* initMem - allocates and initializes all the segments */
81 /*-----------------------------------------------------------------*/
85 /* allocate all the segments */
86 /* xternal stack segment ;
94 POINTER-TYPE - FPOINTER
96 xstack = allocMap (0, 1, 1, 0, 0, 0, options.xstack_loc, XSTACK_NAME, 'A', PPOINTER);
98 /* internal stack segment ;
106 POINTER-TYPE - POINTER
109 istack = allocMap (0, 0, 0, 0, 0, 0, options.stack_loc,
110 ISTACK_NAME, 'B', POINTER);
123 POINTER-TYPE - CPOINTER
125 code = allocMap (0, 1, 0, 0, 0, 1, options.code_loc, CODE_NAME, 'C', CPOINTER);
135 POINTER-TYPE - CPOINTER
137 home = allocMap (0, 1, 0, 0, 0, 1, options.code_loc, CODE_NAME, 'C', CPOINTER);
139 /* Static segment (code for variables );
147 POINTER-TYPE - CPOINTER
149 statsg = allocMap (0, 1, 0, 0, 0, 1, 0, STATIC_NAME, 'D', CPOINTER);
151 /* Data segment - internal storage segment ;
159 POINTER-TYPE - POINTER
161 data = allocMap (0, 0, 0, 1, 0, 0, options.data_loc, DATA_NAME, 'E', POINTER);
163 /* overlay segment - same as internal storage segment ;
171 POINTER-TYPE - POINTER
174 overlay = allocMap (0, 0, 0, 1, 0, 0, options.data_loc, DATA_NAME, 'E', POINTER);
179 /* Xternal paged segment ;
187 POINTER-TYPE - PPOINTER
190 pdata = allocMap (0, 1, 1, 0, 0, 0, options.xstack_loc, PDATA_NAME, 'P', PPOINTER);
195 /* Xternal Data segment -
203 POINTER-TYPE - FPOINTER
205 xdata = allocMap (0, 1, 0, 0, 0, 0, options.xdata_loc, XDATA_NAME, 'F', FPOINTER);
206 xidata = allocMap (0, 1, 0, 0, 0, 0, 0, XIDATA_NAME, 'F', FPOINTER);
207 xinit = allocMap (0, 1, 0, 0, 0, 1, 0, XINIT_NAME, 'C', CPOINTER);
209 /* Indirectly addressed internal data segment
217 POINTER-TYPE - IPOINTER
220 idata = allocMap (0, 0, 0, 0, 0, 0, options.idata_loc,
221 IDATA_NAME, 'G', IPOINTER);
226 /* Static segment (code for variables );
234 POINTER-TYPE - _NONE_
236 bit = allocMap (0, 0, 0, 1, 1, 0, 0, BIT_NAME, 'H', 0);
238 /* Special function register space :-
246 POINTER-TYPE - _NONE_
248 sfr = allocMap (1, 0, 0, 1, 0, 0, 0, REG_NAME, 'I', 0);
258 POINTER-TYPE - _NONE_
260 reg = allocMap (1, 0, 0, 0, 0, 0, 0, REG_NAME, ' ', 0);
270 POINTER-TYPE - _NONE_
272 sfrbit = allocMap (1, 0, 0, 1, 1, 0, 0, REG_NAME, 'J', 0);
282 POINTER-TYPE - EEPPOINTER
284 eeprom = allocMap (0, 1, 0, 0, 0, 0, 0, REG_NAME, 'K', EEPPOINTER);
286 /* the unknown map */
287 generic = allocMap (1, 0, 0, 1, 1, 0, 0, REG_NAME, ' ', GPOINTER);
291 /*-----------------------------------------------------------------*/
292 /* allocIntoSeg - puts a symbol into a memory segment */
293 /*-----------------------------------------------------------------*/
295 allocIntoSeg (symbol * sym)
297 memmap *segment = SPEC_OCLS (sym->etype);
298 addSet (&segment->syms, sym);
301 /*-----------------------------------------------------------------*/
302 /* deleteFromSeg - deletes a symbol from segment used when a var */
303 /* firest declared as "extern" then no extern */
304 /*-----------------------------------------------------------------*/
305 void deleteFromSeg(symbol *sym)
307 if (SPEC_OCLS(sym->etype)) {
308 memmap *segment = SPEC_OCLS (sym->etype);
309 deleteSetItem(&segment->syms,sym);
314 /*-----------------------------------------------------------------*/
315 /* allocGlobal - assigns the output segment to a global var */
316 /*-----------------------------------------------------------------*/
318 allocGlobal (symbol * sym)
321 /* symbol name is internal name */
322 if (!sym->level) /* local statics can come here */
323 SNPRINTF (sym->rname, sizeof(sym->rname),
324 "%s%s", port->fun_prefix, sym->name);
326 /* add it to the operandKey reset */
327 if (!isinSet (operKeyReset, sym)) {
328 addSet(&operKeyReset, sym);
331 /* if this is a literal e.g. enumerated type */
332 /* put it in the data segment & do nothing */
333 if (IS_LITERAL (sym->etype))
335 SPEC_OCLS (sym->etype) = data;
339 /* if this is a function then assign code space */
340 if (IS_FUNC (sym->type))
342 SPEC_OCLS (sym->etype) = code;
343 /* if this is an interrupt service routine
344 then put it in the interrupt service array */
345 if (FUNC_ISISR (sym->type) && !options.noiv
346 && (FUNC_INTNO (sym->type) != INTNO_UNSPEC))
348 if (interrupts[FUNC_INTNO (sym->type)])
349 werror (E_INT_DEFINED,
350 FUNC_INTNO (sym->type),
351 interrupts[FUNC_INTNO (sym->type)]->name);
353 interrupts[FUNC_INTNO (sym->type)] = sym;
355 /* automagically extend the maximum interrupts */
356 if (FUNC_INTNO (sym->type) >= maxInterrupts)
357 maxInterrupts = FUNC_INTNO (sym->type) + 1;
359 /* if it is not compiler defined */
366 /* if this is a SFR or SBIT */
367 if (SPEC_SCLS (sym->etype) == S_SFR ||
368 SPEC_SCLS (sym->etype) == S_SBIT)
371 SPEC_OCLS (sym->etype) =
372 (SPEC_SCLS (sym->etype) == S_SFR ? sfr : sfrbit);
378 /* if this is a bit variable and no storage class */
379 if (SPEC_NOUN (sym->etype) == V_BIT
380 && SPEC_SCLS (sym->etype) == S_BIT)
382 SPEC_OCLS (sym->etype) = bit;
387 /* if bit storage class */
388 if (SPEC_SCLS (sym->etype) == S_SBIT)
390 SPEC_OCLS (sym->etype) = bit;
395 if(!TARGET_IS_PIC16 || (TARGET_IS_PIC16 && sym->level))
396 /* register storage class ignored changed to FIXED */
397 if (SPEC_SCLS (sym->etype) == S_REGISTER)
398 SPEC_SCLS (sym->etype) = S_FIXED;
400 /* if data specified then */
401 if (SPEC_SCLS (sym->etype) == S_DATA)
403 /* set the output class */
404 SPEC_OCLS (sym->etype) = data;
405 /* generate the symbol */
410 /* if it is fixed, then allocate depending on the */
411 /* current memory model, same for automatics */
412 if (SPEC_SCLS (sym->etype) == S_FIXED ||
413 (TARGET_IS_PIC16 && (SPEC_SCLS (sym->etype) == S_REGISTER) && (sym->level==0)) ||
414 SPEC_SCLS (sym->etype) == S_AUTO) {
415 if (port->mem.default_globl_map != xdata) {
416 /* set the output class */
417 SPEC_OCLS (sym->etype) = port->mem.default_globl_map;
418 /* generate the symbol */
422 SPEC_SCLS (sym->etype) = S_XDATA;
426 /* if code change to constant */
427 if (SPEC_SCLS (sym->etype) == S_CODE) {
428 SPEC_OCLS (sym->etype) = statsg;
433 if (SPEC_SCLS (sym->etype) == S_XDATA)
435 // should we move this to the initialized data segment?
436 if (port->genXINIT &&
437 sym->ival && (sym->level==0) && !SPEC_ABSA(sym->etype)) {
438 SPEC_OCLS(sym->etype)=xidata;
440 SPEC_OCLS (sym->etype) = xdata;
446 if (SPEC_SCLS (sym->etype) == S_IDATA)
448 SPEC_OCLS (sym->etype) = idata;
454 if (SPEC_SCLS (sym->etype) == S_PDATA)
456 SPEC_OCLS (sym->etype) = pdata;
462 if (SPEC_SCLS (sym->etype) == S_EEPROM)
464 SPEC_OCLS (sym->etype) = eeprom;
472 /*-----------------------------------------------------------------*/
473 /* allocParms - parameters are always passed on stack */
474 /*-----------------------------------------------------------------*/
476 allocParms (value * val)
481 for (lval = val; lval; lval = lval->next, pNum++)
484 /* check the declaration */
485 checkDecl (lval->sym, 0);
487 /* if this a register parm then allocate
488 it as a local variable by adding it
489 to the first block we see in the body */
490 if (IS_REGPARM (lval->etype))
493 /* mark it as my parameter */
494 lval->sym->ismyparm = 1;
495 lval->sym->localof = currFunc;
498 /* if automatic variables r 2b stacked */
499 if (options.stackAuto || IFFUNC_ISREENT (currFunc->type))
503 lval->sym->onStack = 1;
505 /* choose which stack 2 use */
506 /* use xternal stack */
507 if (options.useXstack)
509 /* PENDING: stack direction support */
510 SPEC_OCLS (lval->etype) = SPEC_OCLS (lval->sym->etype) = xstack;
511 SPEC_STAK (lval->etype) = SPEC_STAK (lval->sym->etype) = lval->sym->stack =
512 xstackPtr - getSize (lval->type);
513 xstackPtr -= getSize (lval->type);
516 { /* use internal stack */
517 SPEC_OCLS (lval->etype) = SPEC_OCLS (lval->sym->etype) = istack;
518 if (port->stack.direction > 0)
520 SPEC_STAK (lval->etype) = SPEC_STAK (lval->sym->etype) = lval->sym->stack =
521 stackPtr - (FUNC_REGBANK (currFunc->type) ? port->stack.bank_overhead : 0) -
522 getSize (lval->type) -
523 (FUNC_ISISR (currFunc->type) ? port->stack.isr_overhead : 0);
524 stackPtr -= getSize (lval->type);
528 /* This looks like the wrong order but it turns out OK... */
529 /* PENDING: isr, bank overhead, ... */
530 SPEC_STAK (lval->etype) = SPEC_STAK (lval->sym->etype) = lval->sym->stack =
532 ((IFFUNC_ISBANKEDCALL (currFunc->type) && !SPEC_STAT(getSpec(currFunc->etype)))? port->stack.banked_overhead : 0) +
533 (FUNC_ISISR (currFunc->type) ? port->stack.isr_overhead : 0) +
535 stackPtr += getSize (lval->type);
538 allocIntoSeg (lval->sym);
541 { /* allocate them in the automatic space */
542 /* generate a unique name */
543 SNPRINTF (lval->sym->rname, sizeof(lval->sym->rname),
544 "%s%s_PARM_%d", port->fun_prefix, currFunc->name, pNum);
545 strncpyz (lval->name, lval->sym->rname, sizeof(lval->name));
547 /* if declared in external storage */
548 if (SPEC_SCLS (lval->etype) == S_XDATA)
549 SPEC_OCLS (lval->etype) = SPEC_OCLS (lval->sym->etype) = xdata;
551 /* other wise depending on the memory model
552 note here that we put it into the overlay segment
553 first, we will remove it from the overlay segment
554 after the overlay determination has been done */
555 if (options.model == MODEL_SMALL)
557 SPEC_OCLS (lval->etype) = SPEC_OCLS (lval->sym->etype) =
558 (options.noOverlay ? port->mem.default_local_map
563 SPEC_SCLS (lval->etype) = S_XDATA;
564 SPEC_OCLS (lval->etype) = SPEC_OCLS (lval->sym->etype) = xdata;
566 allocIntoSeg (lval->sym);
573 /*-----------------------------------------------------------------*/
574 /* deallocParms - parameters are always passed on stack */
575 /*-----------------------------------------------------------------*/
577 deallocParms (value * val)
581 for (lval = val; lval; lval = lval->next)
584 /* unmark is myparm */
585 lval->sym->ismyparm = 0;
587 /* delete it from the symbol table */
588 deleteSym (SymbolTab, lval->sym, lval->sym->name);
590 if (!lval->sym->isref)
592 lval->sym->allocreq = 0;
593 werror (W_NO_REFERENCE,
594 currFunc ? currFunc->name : "(unknown)",
595 "function argument", lval->sym->name);
598 /* move the rname if any to the name for both val & sym */
599 /* and leave a copy of it in the symbol table */
600 if (lval->sym->rname[0])
602 char buffer[SDCC_NAME_MAX];
603 strncpyz (buffer, lval->sym->rname, sizeof(buffer));
604 lval->sym = copySymbol (lval->sym);
605 strncpyz (lval->sym->rname, buffer, sizeof(lval->sym->rname));
606 strncpyz (lval->sym->name, buffer, sizeof(lval->sym->name));
607 strncpyz (lval->name, buffer, sizeof(lval->name));
608 addSym (SymbolTab, lval->sym, lval->sym->name,
609 lval->sym->level, lval->sym->block, 1);
610 lval->sym->_isparm = 1;
611 if (!isinSet (operKeyReset, lval->sym)) {
612 addSet(&operKeyReset, lval->sym);
621 /*-----------------------------------------------------------------*/
622 /* allocLocal - allocate local variables */
623 /*-----------------------------------------------------------------*/
625 allocLocal (symbol * sym)
628 /* generate an unique name */
629 SNPRINTF (sym->rname, sizeof(sym->rname),
632 currFunc->name, sym->name, sym->level, sym->block);
635 sym->localof = currFunc;
637 /* if this is a static variable */
638 if (IS_STATIC (sym->etype))
645 /* if volatile then */
646 if (IS_VOLATILE (sym->etype))
649 /* this is automatic */
651 /* if it's to be placed on the stack */
652 if (options.stackAuto || reentrant) {
654 if (options.useXstack) {
655 /* PENDING: stack direction for xstack */
656 SPEC_OCLS (sym->etype) = xstack;
657 SPEC_STAK (sym->etype) = sym->stack = (xstackPtr + 1);
658 xstackPtr += getSize (sym->type);
660 SPEC_OCLS (sym->etype) = istack;
661 if (port->stack.direction > 0) {
662 SPEC_STAK (sym->etype) = sym->stack = (stackPtr + 1);
663 stackPtr += getSize (sym->type);
665 stackPtr -= getSize (sym->type);
666 SPEC_STAK (sym->etype) = sym->stack = stackPtr;
673 /* else depending on the storage class specified */
674 if (SPEC_SCLS (sym->etype) == S_XDATA)
676 SPEC_OCLS (sym->etype) = xdata;
681 if (SPEC_SCLS (sym->etype) == S_CODE && !sym->_isparm) {
682 SPEC_OCLS (sym->etype) = statsg;
687 if (SPEC_SCLS (sym->etype) == S_IDATA)
689 SPEC_OCLS (sym->etype) = idata;
695 /* if this is a function then assign code space */
696 if (IS_FUNC (sym->type))
698 SPEC_OCLS (sym->etype) = code;
702 /* if this is a SFR or SBIT */
703 if (SPEC_SCLS (sym->etype) == S_SFR ||
704 SPEC_SCLS (sym->etype) == S_SBIT)
706 SPEC_OCLS (sym->etype) =
707 (SPEC_SCLS (sym->etype) == S_SFR ? sfr : sfrbit);
713 /* if this is a bit variable and no storage class */
714 if (SPEC_NOUN (sym->etype) == V_BIT
715 && (SPEC_SCLS (sym->etype) == S_BIT))
717 SPEC_OCLS (sym->etype) = bit;
722 if (SPEC_SCLS (sym->etype) == S_DATA)
724 SPEC_OCLS (sym->etype) = (options.noOverlay ? data : overlay);
729 if (SPEC_SCLS (sym->etype) == S_EEPROM)
731 SPEC_OCLS (sym->etype) = eeprom;
736 /* again note that we have put it into the overlay segment
737 will remove and put into the 'data' segment if required after
738 overlay analysis has been done */
739 if (options.model == MODEL_SMALL) {
740 SPEC_OCLS (sym->etype) =
741 (options.noOverlay ? port->mem.default_local_map
744 SPEC_OCLS (sym->etype) = port->mem.default_local_map;
749 /*-----------------------------------------------------------------*/
750 /* deallocLocal - deallocates the local variables */
751 /*-----------------------------------------------------------------*/
753 deallocLocal (symbol * csym)
757 for (sym = csym; sym; sym = sym->next)
762 /* if it is on the stack */
765 if (options.useXstack)
766 xstackPtr -= getSize (sym->type);
768 stackPtr -= getSize (sym->type);
770 /* if not used give a warning */
771 if (!sym->isref && !IS_STATIC (sym->etype))
772 werror (W_NO_REFERENCE,
773 currFunc ? currFunc->name : "(unknown)",
774 "local variable", sym->name);
775 /* now delete it from the symbol table */
776 deleteSym (SymbolTab, sym, sym->name);
780 /*-----------------------------------------------------------------*/
781 /* overlay2data - moves declarations from the overlay seg to data */
782 /*-----------------------------------------------------------------*/
788 for (sym = setFirstItem (overlay->syms); sym;
789 sym = setNextItem (overlay->syms))
792 SPEC_OCLS (sym->etype) = data;
796 setToNull ((void *) &overlay->syms);
800 /*-----------------------------------------------------------------*/
801 /* overlay2Set - will add all symbols from the overlay segment to */
802 /* the set of sets containing the overlable symbols */
803 /*-----------------------------------------------------------------*/
810 for (sym = setFirstItem (overlay->syms); sym;
811 sym = setNextItem (overlay->syms))
817 setToNull ((void *) &overlay->syms);
818 addSet (&ovrSetSets, oset);
822 /*-----------------------------------------------------------------*/
823 /* allocVariables - creates decl & assign storage class for a v */
824 /*-----------------------------------------------------------------*/
826 allocVariables (symbol * symChain)
833 /* go thru the symbol chain */
834 for (sym = symChain; sym; sym = sym->next)
837 /* if this is a typedef then add it */
838 /* to the typedef table */
839 if (IS_TYPEDEF (sym->etype))
841 /* check if the typedef already exists */
842 csym = findSym (TypedefTab, NULL, sym->name);
843 if (csym && csym->level == sym->level)
844 werror (E_DUPLICATE_TYPEDEF, sym->name);
846 SPEC_EXTR (sym->etype) = 0;
847 addSym (TypedefTab, sym, sym->name, sym->level, sym->block, 0);
848 continue; /* go to the next one */
850 /* make sure it already exist */
851 csym = findSymWithLevel (SymbolTab, sym);
852 if (!csym || (csym && csym->level != sym->level))
855 /* check the declaration */
858 /* if this is a function or a pointer to function */
859 /* then args processing */
860 if (funcInChain (csym->type))
862 processFuncArgs (csym);
864 /* if register bank specified then update maxRegBank */
865 if (maxRegBank < FUNC_REGBANK (csym->type))
866 maxRegBank = FUNC_REGBANK (csym->type);
867 /*JCF: Mark the register bank as used*/
868 RegBankUsed[FUNC_REGBANK(csym->type)]=1;
871 /* if this is a extern variable then change the */
872 /* level to zero temporarily */
873 if (IS_EXTERN (csym->etype) || IS_FUNC (csym->type))
875 saveLevel = csym->level;
879 /* if this is a literal then it is an enumerated */
880 /* type so need not allocate it space for it */
881 if (IS_LITERAL (sym->etype))
884 /* generate the actual declaration */
889 stack += getSize (csym->type);
894 /* restore the level */
895 if (IS_EXTERN (csym->etype) || IS_FUNC (csym->type))
896 csym->level = saveLevel;
902 /*-----------------------------------------------------------------*/
903 /* redoStackOffsets :- will reassign the values for stack offsets */
904 /*-----------------------------------------------------------------*/
906 redoStackOffsets (void)
912 /* after register allocation is complete we know
913 which variables will need to be assigned space
914 on the stack. We will eliminate those variables
915 which do not have the allocReq flag thus reducing
917 for (sym = setFirstItem (istack->syms); sym;
918 sym = setNextItem (istack->syms))
921 int size = getSize (sym->type);
922 /* nothing to do with parameters so continue */
923 if ((sym->_isparm && !IS_REGPARM (sym->etype)))
926 if (IS_AGGREGATE (sym->type))
928 if (port->stack.direction > 0)
930 SPEC_STAK (sym->etype) = sym->stack = (sPtr + 1);
936 SPEC_STAK (sym->etype) = sym->stack = sPtr;
941 /* if allocation not required then subtract
942 size from overall stack size & continue */
945 currFunc->stack -= size;
946 SPEC_STAK (currFunc->etype) -= size;
950 if (port->stack.direction > 0)
952 SPEC_STAK (sym->etype) = sym->stack = (sPtr + 1);
958 SPEC_STAK (sym->etype) = sym->stack = sPtr;
962 /* do the same for the external stack */
964 for (sym = setFirstItem (xstack->syms); sym;
965 sym = setNextItem (xstack->syms))
968 int size = getSize (sym->type);
969 /* nothing to do with parameters so continue */
970 if ((sym->_isparm && !IS_REGPARM (sym->etype)))
973 if (IS_AGGREGATE (sym->type))
975 SPEC_STAK (sym->etype) = sym->stack = (xsPtr + 1);
980 /* if allocation not required then subtract
981 size from overall stack size & continue */
984 currFunc->xstack -= size;
985 SPEC_STAK (currFunc->etype) -= size;
989 SPEC_STAK (sym->etype) = sym->stack = (xsPtr + 1);
995 /*-----------------------------------------------------------------*/
996 /* printAllocInfoSeg- print the allocation for a given section */
997 /*-----------------------------------------------------------------*/
999 printAllocInfoSeg (memmap * map, symbol * func, FILE * of)
1008 for (sym = setFirstItem (map->syms); sym;
1009 sym = setNextItem (map->syms))
1012 if (sym->level == 0)
1014 if (sym->localof != func)
1017 fprintf (of, ";%-25s Allocated ", sym->name);
1019 /* if assigned to registers */
1020 if (!sym->allocreq && sym->reqv)
1024 sym = OP_SYMBOL (sym->reqv);
1025 if (!sym->isspilt || sym->remat)
1027 fprintf (of, "to registers ");
1028 for (i = 0; i < 4 && sym->regs[i]; i++)
1029 fprintf (of, "%s ", port->getRegName (sym->regs[i]));
1035 sym = sym->usl.spillLoc;
1042 fprintf (of, "to stack - offset %d\n", sym->stack);
1046 /* otherwise give rname */
1047 fprintf (of, "with name '%s'\n", sym->rname);
1051 /*-----------------------------------------------------------------*/
1052 /* canOverlayLocals - returns true if the local variables can overlayed */
1053 /*-----------------------------------------------------------------*/
1055 canOverlayLocals (eBBlock ** ebbs, int count)
1058 /* if staticAuto is in effect or the current function
1059 being compiled is reentrant or the overlay segment
1060 is empty or no overlay option is in effect then */
1061 if (options.noOverlay ||
1062 options.stackAuto ||
1064 (IFFUNC_ISREENT (currFunc->type) ||
1065 FUNC_ISISR (currFunc->type))) ||
1066 elementsInSet (overlay->syms) == 0)
1070 /* if this is a forces overlay */
1071 if (IFFUNC_ISOVERLAY(currFunc->type)) return TRUE;
1073 /* otherwise do thru the blocks and see if there
1074 any function calls if found then return false */
1075 for (i = 0; i < count; i++)
1079 for (ic = ebbs[i]->sch; ic; ic = ic->next)
1081 if (ic->op == CALL) {
1082 sym_link *ftype = operandType(IC_LEFT(ic));
1083 /* builtins only can use overlays */
1084 if (!IFFUNC_ISBUILTIN(ftype)) return FALSE;
1085 } else if (ic->op == PCALL) return FALSE;
1089 /* no function calls found return TRUE */
1093 /*-----------------------------------------------------------------*/
1094 /* doOverlays - move the overlay segment to appropriate location */
1095 /*-----------------------------------------------------------------*/
1097 doOverlays (eBBlock ** ebbs, int count)
1103 /* check if the parameters and local variables
1104 of this function can be put in the overlay segment
1105 This check is essentially to see if the function
1106 calls any other functions if yes then we cannot
1108 if (canOverlayLocals (ebbs, count))
1109 /* if we can then put the parameters &
1110 local variables in the overlay set */
1113 /* otherwise put them into data where
1118 /*-----------------------------------------------------------------*/
1119 /* printAllocInfo - prints allocation information for a function */
1120 /*-----------------------------------------------------------------*/
1122 printAllocInfo (symbol * func, FILE * of)
1130 /* must be called after register allocation is complete */
1131 fprintf (of, ";------------------------------------------------------------\n");
1132 fprintf (of, ";Allocation info for local variables in function '%s'\n", func->name);
1133 fprintf (of, ";------------------------------------------------------------\n");
1135 printAllocInfoSeg (xstack, func, of);
1136 printAllocInfoSeg (istack, func, of);
1137 printAllocInfoSeg (code, func, of);
1138 printAllocInfoSeg (data, func, of);
1139 printAllocInfoSeg (xdata, func, of);
1140 printAllocInfoSeg (idata, func, of);
1141 printAllocInfoSeg (sfr, func, of);
1142 printAllocInfoSeg (sfrbit, func, of);
1146 set *tempOverlaySyms = overlay->syms;
1148 /* search the set of overlay sets for local variables/parameters */
1149 for (ovrset = setFirstItem (ovrSetSets); ovrset;
1150 ovrset = setNextItem (ovrSetSets))
1152 overlay->syms = ovrset;
1153 printAllocInfoSeg (overlay, func, of);
1155 overlay->syms = tempOverlaySyms;
1158 fprintf (of, ";------------------------------------------------------------\n");