1 /*-------------------------------------------------------------------------
3 pcode.c - post code generation
4 Written By - Scott Dattalo scott@dattalo.com
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 -------------------------------------------------------------------------*/
23 #include "common.h" // Include everything in the SDCC src directory
28 #include "pcodeflow.h"
32 #if defined(__BORLANDC__) || defined(_MSC_VER)
33 #define STRCASECMP stricmp
35 #define STRCASECMP strcasecmp
38 /****************************************************************/
39 /****************************************************************/
41 peepCommand peepCommands[] = {
43 {NOTBITSKIP, "_NOTBITSKIP_"},
44 {BITSKIP, "_BITSKIP_"},
45 {INVERTBITSKIP, "_INVERTBITSKIP_"},
52 // Eventually this will go into device dependent files:
53 pCodeOpReg pc_status = {{PO_STATUS, "_STATUS"}, -1, NULL,0,NULL};
54 pCodeOpReg pc_indf = {{PO_INDF, "INDF"}, -1, NULL,0,NULL};
55 pCodeOpReg pc_fsr = {{PO_FSR, "FSR"}, -1, NULL,0,NULL};
56 pCodeOpReg pc_intcon = {{PO_INTCON, ""}, -1, NULL,0,NULL};
57 pCodeOpReg pc_pcl = {{PO_PCL, "PCL"}, -1, NULL,0,NULL};
58 pCodeOpReg pc_pclath = {{PO_PCLATH, "_PCLATH"}, -1, NULL,0,NULL};
60 pCodeOpReg pc_kzero = {{PO_GPR_REGISTER, "KZ"}, -1, NULL,0,NULL};
61 pCodeOpReg pc_wsave = {{PO_GPR_REGISTER, "WSAVE"}, -1, NULL,0,NULL};
62 pCodeOpReg pc_ssave = {{PO_GPR_REGISTER, "SSAVE"}, -1, NULL,0,NULL};
64 static int mnemonics_initialized = 0;
67 static hTab *pic14MnemonicsHash = NULL;
68 static hTab *pic14pCodePeepCommandsHash = NULL;
72 static pFile *the_pFile = NULL;
73 static pBlock *pb_dead_pcodes = NULL;
75 /* Hardcoded flags to change the behavior of the PIC port */
76 static int peepOptimizing = 1; /* run the peephole optimizer if nonzero */
77 static int functionInlining = 1; /* inline functions if nonzero */
78 int debug_verbose = 0; /* Set true to inundate .asm file */
80 static int GpCodeSequenceNumber = 1;
83 extern void RemoveUnusedRegisters(void);
84 extern void RegsUnMapLiveRanges(void);
85 extern void BuildFlowTree(pBlock *pb);
86 extern void pCodeRegOptimizeRegUsage(int level);
87 extern int picIsInitialized(void);
89 /****************************************************************/
90 /* Forward declarations */
91 /****************************************************************/
93 void unlinkpCode(pCode *pc);
95 static void genericAnalyze(pCode *pc);
96 static void AnalyzeGOTO(pCode *pc);
97 static void AnalyzeSKIP(pCode *pc);
98 static void AnalyzeRETURN(pCode *pc);
101 static void genericDestruct(pCode *pc);
102 static void genericPrint(FILE *of,pCode *pc);
104 static void pCodePrintLabel(FILE *of, pCode *pc);
105 static void pCodePrintFunction(FILE *of, pCode *pc);
106 static void pCodeOpPrint(FILE *of, pCodeOp *pcop);
107 static char *get_op_from_instruction( pCodeInstruction *pcc);
108 char *get_op( pCodeOp *pcop,char *buff,int buf_size);
109 int pCodePeepMatchLine(pCodePeep *peepBlock, pCode *pcs, pCode *pcd);
110 int pCodePeepMatchRule(pCode *pc);
111 void pBlockStats(FILE *of, pBlock *pb);
112 pBlock *newpBlock(void);
113 extern void pCodeInsertAfter(pCode *pc1, pCode *pc2);
114 extern pCodeOp *popCopyReg(pCodeOpReg *pc);
115 pCodeOp *popCopyGPR2Bit(pCodeOp *pc, int bitval);
116 void pCodeRegMapLiveRanges(pBlock *pb);
119 /****************************************************************/
120 /* PIC Instructions */
121 /****************************************************************/
123 pCodeInstruction pciADDWF = {
124 {PC_OPCODE, NULL, NULL, 0, NULL,
137 1,0, // dest, bit instruction
140 (PCC_W | PCC_REGISTER), // inCond
141 (PCC_REGISTER | PCC_Z) // outCond
144 pCodeInstruction pciADDFW = {
145 {PC_OPCODE, NULL, NULL, 0, NULL,
158 0,0, // dest, bit instruction
161 (PCC_W | PCC_REGISTER), // inCond
162 (PCC_W | PCC_Z) // outCond
165 pCodeInstruction pciADDLW = {
166 {PC_OPCODE, NULL, NULL, 0, NULL,
179 0,0, // dest, bit instruction
182 (PCC_W | PCC_LITERAL), // inCond
183 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
186 pCodeInstruction pciANDLW = {
187 {PC_OPCODE, NULL, NULL, 0, NULL,
200 0,0, // dest, bit instruction
203 (PCC_W | PCC_LITERAL), // inCond
204 (PCC_W | PCC_Z) // outCond
207 pCodeInstruction pciANDWF = {
208 {PC_OPCODE, NULL, NULL, 0, NULL,
221 1,0, // dest, bit instruction
224 (PCC_W | PCC_REGISTER), // inCond
225 (PCC_REGISTER | PCC_Z) // outCond
228 pCodeInstruction pciANDFW = {
229 {PC_OPCODE, NULL, NULL, 0, NULL,
242 0,0, // dest, bit instruction
245 (PCC_W | PCC_REGISTER), // inCond
246 (PCC_W | PCC_Z) // outCond
249 pCodeInstruction pciBCF = {
250 {PC_OPCODE, NULL, NULL, 0, NULL,
263 1,1, // dest, bit instruction
266 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
267 PCC_REGISTER // outCond
270 pCodeInstruction pciBSF = {
271 {PC_OPCODE, NULL, NULL, 0, NULL,
284 1,1, // dest, bit instruction
287 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
288 (PCC_REGISTER | PCC_EXAMINE_PCOP) // outCond
291 pCodeInstruction pciBTFSC = {
292 {PC_OPCODE, NULL, NULL, 0, NULL,
305 0,1, // dest, bit instruction
308 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
309 PCC_EXAMINE_PCOP // outCond
312 pCodeInstruction pciBTFSS = {
313 {PC_OPCODE, NULL, NULL, 0, NULL,
326 0,1, // dest, bit instruction
329 (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
330 PCC_EXAMINE_PCOP // outCond
333 pCodeInstruction pciCALL = {
334 {PC_OPCODE, NULL, NULL, 0, NULL,
347 0,0, // dest, bit instruction
354 pCodeInstruction pciCOMF = {
355 {PC_OPCODE, NULL, NULL, 0, NULL,
368 1,0, // dest, bit instruction
371 PCC_REGISTER, // inCond
372 PCC_REGISTER // outCond
375 pCodeInstruction pciCOMFW = {
376 {PC_OPCODE, NULL, NULL, 0, NULL,
389 0,0, // dest, bit instruction
392 PCC_REGISTER, // inCond
396 pCodeInstruction pciCLRF = {
397 {PC_OPCODE, NULL, NULL, 0, NULL,
410 0,0, // dest, bit instruction
414 PCC_REGISTER // outCond
417 pCodeInstruction pciCLRW = {
418 {PC_OPCODE, NULL, NULL, 0, NULL,
431 0,0, // dest, bit instruction
438 pCodeInstruction pciCLRWDT = {
439 {PC_OPCODE, NULL, NULL, 0, NULL,
452 0,0, // dest, bit instruction
459 pCodeInstruction pciDECF = {
460 {PC_OPCODE, NULL, NULL, 0, NULL,
473 1,0, // dest, bit instruction
476 PCC_REGISTER, // inCond
477 PCC_REGISTER // outCond
480 pCodeInstruction pciDECFW = {
481 {PC_OPCODE, NULL, NULL, 0, NULL,
494 0,0, // dest, bit instruction
497 PCC_REGISTER, // inCond
501 pCodeInstruction pciDECFSZ = {
502 {PC_OPCODE, NULL, NULL, 0, NULL,
515 1,0, // dest, bit instruction
518 PCC_REGISTER, // inCond
519 PCC_REGISTER // outCond
522 pCodeInstruction pciDECFSZW = {
523 {PC_OPCODE, NULL, NULL, 0, NULL,
536 0,0, // dest, bit instruction
539 PCC_REGISTER, // inCond
543 pCodeInstruction pciGOTO = {
544 {PC_OPCODE, NULL, NULL, 0, NULL,
557 0,0, // dest, bit instruction
564 pCodeInstruction pciINCF = {
565 {PC_OPCODE, NULL, NULL, 0, NULL,
578 1,0, // dest, bit instruction
581 PCC_REGISTER, // inCond
582 PCC_REGISTER // outCond
585 pCodeInstruction pciINCFW = {
586 {PC_OPCODE, NULL, NULL, 0, NULL,
599 0,0, // dest, bit instruction
602 PCC_REGISTER, // inCond
606 pCodeInstruction pciINCFSZ = {
607 {PC_OPCODE, NULL, NULL, 0, NULL,
620 1,0, // dest, bit instruction
623 PCC_REGISTER, // inCond
624 PCC_REGISTER // outCond
627 pCodeInstruction pciINCFSZW = {
628 {PC_OPCODE, NULL, NULL, 0, NULL,
641 0,0, // dest, bit instruction
644 PCC_REGISTER, // inCond
648 pCodeInstruction pciIORWF = {
649 {PC_OPCODE, NULL, NULL, 0, NULL,
662 1,0, // dest, bit instruction
665 (PCC_W | PCC_REGISTER), // inCond
666 (PCC_REGISTER | PCC_Z) // outCond
669 pCodeInstruction pciIORFW = {
670 {PC_OPCODE, NULL, NULL, 0, NULL,
683 0,0, // dest, bit instruction
686 (PCC_W | PCC_REGISTER), // inCond
687 (PCC_W | PCC_Z) // outCond
690 pCodeInstruction pciIORLW = {
691 {PC_OPCODE, NULL, NULL, 0, NULL,
704 0,0, // dest, bit instruction
707 (PCC_W | PCC_LITERAL), // inCond
708 (PCC_W | PCC_Z) // outCond
711 pCodeInstruction pciMOVF = {
712 {PC_OPCODE, NULL, NULL, 0, NULL,
725 1,0, // dest, bit instruction
728 PCC_REGISTER, // inCond
732 pCodeInstruction pciMOVFW = {
733 {PC_OPCODE, NULL, NULL, 0, NULL,
746 0,0, // dest, bit instruction
749 PCC_REGISTER, // inCond
750 (PCC_W | PCC_Z) // outCond
753 pCodeInstruction pciMOVWF = {
754 {PC_OPCODE, NULL, NULL, 0, NULL,
767 0,0, // dest, bit instruction
771 PCC_REGISTER // outCond
774 pCodeInstruction pciMOVLW = {
775 {PC_OPCODE, NULL, NULL, 0, NULL,
788 0,0, // dest, bit instruction
791 (PCC_NONE | PCC_LITERAL), // inCond
795 pCodeInstruction pciNOP = {
796 {PC_OPCODE, NULL, NULL, 0, NULL,
808 0,0, // dest, bit instruction
815 pCodeInstruction pciRETFIE = {
816 {PC_OPCODE, NULL, NULL, 0, NULL,
829 0,0, // dest, bit instruction
833 PCC_NONE // outCond (not true... affects the GIE bit too)
836 pCodeInstruction pciRETLW = {
837 {PC_OPCODE, NULL, NULL, 0, NULL,
850 0,0, // dest, bit instruction
853 PCC_LITERAL, // inCond
857 pCodeInstruction pciRETURN = {
858 {PC_OPCODE, NULL, NULL, 0, NULL,
871 0,0, // dest, bit instruction
878 pCodeInstruction pciRLF = {
879 {PC_OPCODE, NULL, NULL, 0, NULL,
892 1,0, // dest, bit instruction
895 (PCC_C | PCC_REGISTER), // inCond
896 (PCC_REGISTER | PCC_Z | PCC_C | PCC_DC) // outCond
899 pCodeInstruction pciRLFW = {
900 {PC_OPCODE, NULL, NULL, 0, NULL,
913 0,0, // dest, bit instruction
916 (PCC_C | PCC_REGISTER), // inCond
917 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
920 pCodeInstruction pciRRF = {
921 {PC_OPCODE, NULL, NULL, 0, NULL,
934 1,0, // dest, bit instruction
937 (PCC_C | PCC_REGISTER), // inCond
938 (PCC_REGISTER | PCC_Z | PCC_C | PCC_DC) // outCond
941 pCodeInstruction pciRRFW = {
942 {PC_OPCODE, NULL, NULL, 0, NULL,
955 0,0, // dest, bit instruction
958 (PCC_C | PCC_REGISTER), // inCond
959 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
962 pCodeInstruction pciSUBWF = {
963 {PC_OPCODE, NULL, NULL, 0, NULL,
976 1,0, // dest, bit instruction
979 (PCC_W | PCC_REGISTER), // inCond
980 (PCC_REGISTER | PCC_Z) // outCond
983 pCodeInstruction pciSUBFW = {
984 {PC_OPCODE, NULL, NULL, 0, NULL,
997 0,0, // dest, bit instruction
1000 (PCC_W | PCC_REGISTER), // inCond
1001 (PCC_W | PCC_Z) // outCond
1004 pCodeInstruction pciSUBLW = {
1005 {PC_OPCODE, NULL, NULL, 0, NULL,
1011 NULL, // from branch
1018 0,0, // dest, bit instruction
1019 0,0, // branch, skip
1021 (PCC_W | PCC_LITERAL), // inCond
1022 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
1025 pCodeInstruction pciSWAPF = {
1026 {PC_OPCODE, NULL, NULL, 0, NULL,
1032 NULL, // from branch
1039 1,0, // dest, bit instruction
1040 0,0, // branch, skip
1042 (PCC_REGISTER), // inCond
1043 (PCC_REGISTER) // outCond
1046 pCodeInstruction pciSWAPFW = {
1047 {PC_OPCODE, NULL, NULL, 0, NULL,
1053 NULL, // from branch
1060 0,0, // dest, bit instruction
1061 0,0, // branch, skip
1063 (PCC_REGISTER), // inCond
1067 pCodeInstruction pciTRIS = {
1068 {PC_OPCODE, NULL, NULL, 0, NULL,
1074 NULL, // from branch
1081 0,0, // dest, bit instruction
1082 0,0, // branch, skip
1085 PCC_REGISTER // outCond
1088 pCodeInstruction pciXORWF = {
1089 {PC_OPCODE, NULL, NULL, 0, NULL,
1095 NULL, // from branch
1102 1,0, // dest, bit instruction
1103 0,0, // branch, skip
1105 (PCC_W | PCC_REGISTER), // inCond
1106 (PCC_REGISTER | PCC_Z) // outCond
1109 pCodeInstruction pciXORFW = {
1110 {PC_OPCODE, NULL, NULL, 0, NULL,
1116 NULL, // from branch
1123 0,0, // dest, bit instruction
1124 0,0, // branch, skip
1126 (PCC_W | PCC_REGISTER), // inCond
1127 (PCC_W | PCC_Z) // outCond
1130 pCodeInstruction pciXORLW = {
1131 {PC_OPCODE, NULL, NULL, 0, NULL,
1137 NULL, // from branch
1144 0,0, // dest, bit instruction
1145 0,0, // branch, skip
1147 (PCC_W | PCC_LITERAL), // inCond
1148 (PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
1152 #define MAX_PIC14MNEMONICS 100
1153 pCodeInstruction *pic14Mnemonics[MAX_PIC14MNEMONICS];
1155 /* This definition needs to be part of configure.in */
1156 // #define USE_VSNPRINTF
1158 #ifdef USE_VSNPRINTF
1159 // Alas, vsnprintf is not ANSI standard, and does not exist
1160 // on Solaris (and probably other non-Gnu flavored Unixes).
1162 /*-----------------------------------------------------------------*/
1163 /* SAFE_snprintf - like snprintf except the string pointer is */
1164 /* after the string has been printed to. This is */
1165 /* useful for printing to string as though if it */
1166 /* were a stream. */
1167 /*-----------------------------------------------------------------*/
1168 void SAFE_snprintf(char **str, size_t *size, const char *format, ...)
1176 va_start(val, format);
1178 vsnprintf(*str, *size, format, val);
1184 fprintf(stderr,"WARNING, it looks like %s has overflowed\n",__FUNCTION__);
1185 fprintf(stderr,"len = %d is > str size %d\n",len,*size);
1193 #else // USE_VSNPRINTF
1195 // This version is *not* safe, despite the name.
1197 void SAFE_snprintf(char **str, size_t *size, const char *format, ...)
1201 static char buffer[1024]; /* grossly conservative, but still not inherently safe */
1206 va_start(val, format);
1208 vsprintf(buffer, format, val);
1211 len = strlen(buffer);
1213 fprintf(stderr,"WARNING, it looks like %s has overflowed\n",__FUNCTION__);
1214 fprintf(stderr,"len = %d is > str size %d\n",len,*size);
1217 strcpy(*str, buffer);
1223 #endif // USE_VSNPRINTF
1226 extern void initStack(int base_address, int size);
1227 extern regs *allocProcessorRegister(int rIdx, char * name, short po_type, int alias);
1228 extern regs *allocInternalRegister(int rIdx, char * name, short po_type, int alias);
1229 extern void init_pic(char *);
1231 void pCodeInitRegisters(void)
1233 static int initialized=0;
1239 initStack(0xfff, 8);
1240 init_pic(port->processor);
1242 pc_status.r = allocProcessorRegister(IDX_STATUS,"_STATUS", PO_STATUS, 0x80);
1243 pc_pcl.r = allocProcessorRegister(IDX_PCL,"PCL", PO_PCL, 0x80);
1244 pc_pclath.r = allocProcessorRegister(IDX_PCLATH,"_PCLATH", PO_PCLATH, 0x80);
1245 pc_fsr.r = allocProcessorRegister(IDX_FSR,"FSR", PO_FSR, 0x80);
1246 pc_indf.r = allocProcessorRegister(IDX_INDF,"INDF", PO_INDF, 0x80);
1247 pc_intcon.r = allocProcessorRegister(IDX_INTCON,"INTCON", PO_INTCON, 0x80);
1249 pc_status.rIdx = IDX_STATUS;
1250 pc_fsr.rIdx = IDX_FSR;
1251 pc_indf.rIdx = IDX_INDF;
1252 pc_intcon.rIdx = IDX_INTCON;
1253 pc_pcl.rIdx = IDX_PCL;
1254 pc_pclath.rIdx = IDX_PCLATH;
1256 pc_kzero.r = allocInternalRegister(IDX_KZ,"KZ",PO_GPR_REGISTER,0);
1257 pc_ssave.r = allocInternalRegister(IDX_SSAVE,"SSAVE", PO_GPR_REGISTER, 0x80);
1258 pc_wsave.r = allocInternalRegister(IDX_WSAVE,"WSAVE", PO_GPR_REGISTER, 0);
1260 pc_kzero.rIdx = IDX_KZ;
1261 pc_wsave.rIdx = IDX_WSAVE;
1262 pc_ssave.rIdx = IDX_SSAVE;
1264 /* probably should put this in a separate initialization routine */
1265 pb_dead_pcodes = newpBlock();
1269 /*-----------------------------------------------------------------*/
1270 /* mnem2key - convert a pic mnemonic into a hash key */
1271 /* (BTW - this spreads the mnemonics quite well) */
1273 /*-----------------------------------------------------------------*/
1275 int mnem2key(char const *mnem)
1284 key += toupper(*mnem++) +1;
1288 return (key & 0x1f);
1292 void pic14initMnemonics(void)
1297 pCodeInstruction *pci;
1299 if(mnemonics_initialized)
1302 //FIXME - probably should NULL out the array before making the assignments
1303 //since we check the array contents below this initialization.
1305 pic14Mnemonics[POC_ADDLW] = &pciADDLW;
1306 pic14Mnemonics[POC_ADDWF] = &pciADDWF;
1307 pic14Mnemonics[POC_ADDFW] = &pciADDFW;
1308 pic14Mnemonics[POC_ANDLW] = &pciANDLW;
1309 pic14Mnemonics[POC_ANDWF] = &pciANDWF;
1310 pic14Mnemonics[POC_ANDFW] = &pciANDFW;
1311 pic14Mnemonics[POC_BCF] = &pciBCF;
1312 pic14Mnemonics[POC_BSF] = &pciBSF;
1313 pic14Mnemonics[POC_BTFSC] = &pciBTFSC;
1314 pic14Mnemonics[POC_BTFSS] = &pciBTFSS;
1315 pic14Mnemonics[POC_CALL] = &pciCALL;
1316 pic14Mnemonics[POC_COMF] = &pciCOMF;
1317 pic14Mnemonics[POC_COMFW] = &pciCOMFW;
1318 pic14Mnemonics[POC_CLRF] = &pciCLRF;
1319 pic14Mnemonics[POC_CLRW] = &pciCLRW;
1320 pic14Mnemonics[POC_CLRWDT] = &pciCLRWDT;
1321 pic14Mnemonics[POC_DECF] = &pciDECF;
1322 pic14Mnemonics[POC_DECFW] = &pciDECFW;
1323 pic14Mnemonics[POC_DECFSZ] = &pciDECFSZ;
1324 pic14Mnemonics[POC_DECFSZW] = &pciDECFSZW;
1325 pic14Mnemonics[POC_GOTO] = &pciGOTO;
1326 pic14Mnemonics[POC_INCF] = &pciINCF;
1327 pic14Mnemonics[POC_INCFW] = &pciINCFW;
1328 pic14Mnemonics[POC_INCFSZ] = &pciINCFSZ;
1329 pic14Mnemonics[POC_INCFSZW] = &pciINCFSZW;
1330 pic14Mnemonics[POC_IORLW] = &pciIORLW;
1331 pic14Mnemonics[POC_IORWF] = &pciIORWF;
1332 pic14Mnemonics[POC_IORFW] = &pciIORFW;
1333 pic14Mnemonics[POC_MOVF] = &pciMOVF;
1334 pic14Mnemonics[POC_MOVFW] = &pciMOVFW;
1335 pic14Mnemonics[POC_MOVLW] = &pciMOVLW;
1336 pic14Mnemonics[POC_MOVWF] = &pciMOVWF;
1337 pic14Mnemonics[POC_NOP] = &pciNOP;
1338 pic14Mnemonics[POC_RETFIE] = &pciRETFIE;
1339 pic14Mnemonics[POC_RETLW] = &pciRETLW;
1340 pic14Mnemonics[POC_RETURN] = &pciRETURN;
1341 pic14Mnemonics[POC_RLF] = &pciRLF;
1342 pic14Mnemonics[POC_RLFW] = &pciRLFW;
1343 pic14Mnemonics[POC_RRF] = &pciRRF;
1344 pic14Mnemonics[POC_RRFW] = &pciRRFW;
1345 pic14Mnemonics[POC_SUBLW] = &pciSUBLW;
1346 pic14Mnemonics[POC_SUBWF] = &pciSUBWF;
1347 pic14Mnemonics[POC_SUBFW] = &pciSUBFW;
1348 pic14Mnemonics[POC_SWAPF] = &pciSWAPF;
1349 pic14Mnemonics[POC_SWAPFW] = &pciSWAPFW;
1350 pic14Mnemonics[POC_TRIS] = &pciTRIS;
1351 pic14Mnemonics[POC_XORLW] = &pciXORLW;
1352 pic14Mnemonics[POC_XORWF] = &pciXORWF;
1353 pic14Mnemonics[POC_XORFW] = &pciXORFW;
1355 for(i=0; i<MAX_PIC14MNEMONICS; i++)
1356 if(pic14Mnemonics[i])
1357 hTabAddItem(&pic14MnemonicsHash, mnem2key(pic14Mnemonics[i]->mnemonic), pic14Mnemonics[i]);
1358 pci = hTabFirstItem(pic14MnemonicsHash, &key);
1361 DFPRINTF((stderr, "element %d key %d, mnem %s\n",i++,key,pci->mnemonic));
1362 pci = hTabNextItem(pic14MnemonicsHash, &key);
1365 mnemonics_initialized = 1;
1368 int getpCodePeepCommand(char *cmd);
1370 int getpCode(char *mnem,unsigned dest)
1373 pCodeInstruction *pci;
1374 int key = mnem2key(mnem);
1376 if(!mnemonics_initialized)
1377 pic14initMnemonics();
1379 pci = hTabFirstItemWK(pic14MnemonicsHash, key);
1383 if(STRCASECMP(pci->mnemonic, mnem) == 0) {
1384 if((pci->num_ops <= 1) || (pci->isModReg == dest))
1388 pci = hTabNextItemWK (pic14MnemonicsHash);
1395 /*-----------------------------------------------------------------*
1396 * pic14initpCodePeepCommands
1398 *-----------------------------------------------------------------*/
1399 void pic14initpCodePeepCommands(void)
1407 hTabAddItem(&pic14pCodePeepCommandsHash,
1408 mnem2key(peepCommands[i].cmd), &peepCommands[i]);
1410 } while (peepCommands[i].cmd);
1412 pcmd = hTabFirstItem(pic14pCodePeepCommandsHash, &key);
1415 //fprintf(stderr, "peep command %s key %d\n",pcmd->cmd,pcmd->id);
1416 pcmd = hTabNextItem(pic14pCodePeepCommandsHash, &key);
1421 /*-----------------------------------------------------------------
1424 *-----------------------------------------------------------------*/
1426 int getpCodePeepCommand(char *cmd)
1430 int key = mnem2key(cmd);
1433 pcmd = hTabFirstItemWK(pic14pCodePeepCommandsHash, key);
1436 // fprintf(stderr," comparing %s to %s\n",pcmd->cmd,cmd);
1437 if(STRCASECMP(pcmd->cmd, cmd) == 0) {
1441 pcmd = hTabNextItemWK (pic14pCodePeepCommandsHash);
1448 char getpBlock_dbName(pBlock *pb)
1454 return pb->cmemmap->dbName;
1458 void pBlockConvert2ISR(pBlock *pb)
1469 /*-----------------------------------------------------------------*/
1470 /* movepBlock2Head - given the dbname of a pBlock, move all */
1471 /* instances to the front of the doubly linked */
1472 /* list of pBlocks */
1473 /*-----------------------------------------------------------------*/
1475 void movepBlock2Head(char dbName)
1479 pb = the_pFile->pbHead;
1483 if(getpBlock_dbName(pb) == dbName) {
1484 pBlock *pbn = pb->next;
1485 pb->next = the_pFile->pbHead;
1486 the_pFile->pbHead->prev = pb;
1487 the_pFile->pbHead = pb;
1490 pb->prev->next = pbn;
1492 // If the pBlock that we just moved was the last
1493 // one in the link of all of the pBlocks, then we
1494 // need to point the tail to the block just before
1495 // the one we moved.
1496 // Note: if pb->next is NULL, then pb must have
1497 // been the last pBlock in the chain.
1500 pbn->prev = pb->prev;
1502 the_pFile->pbTail = pb->prev;
1513 void copypCode(FILE *of, char dbName)
1517 if(!of || !the_pFile)
1520 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
1521 if(getpBlock_dbName(pb) == dbName) {
1528 void pcode_test(void)
1531 DFPRINTF((stderr,"pcode is alive!\n"));
1541 /* create the file name */
1542 strcpy(buffer,srcFileName);
1543 strcat(buffer,".p");
1545 if( !(pFile = fopen(buffer, "w" ))) {
1546 werror(E_FILE_OPEN_ERR,buffer);
1550 fprintf(pFile,"pcode dump\n\n");
1552 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
1553 fprintf(pFile,"\n\tNew pBlock\n\n");
1555 fprintf(pFile,"%s",pb->cmemmap->sname);
1557 fprintf(pFile,"internal pblock");
1559 fprintf(pFile,", dbName =%c\n",getpBlock_dbName(pb));
1560 printpBlock(pFile,pb);
1564 /*-----------------------------------------------------------------*/
1565 /* int RegCond(pCodeOp *pcop) - if pcop points to the STATUS reg- */
1566 /* ister, RegCond will return the bit being referenced. */
1568 /* fixme - why not just OR in the pcop bit field */
1569 /*-----------------------------------------------------------------*/
1571 static int RegCond(pCodeOp *pcop)
1577 if(pcop->type == PO_GPR_BIT && !strcmp(pcop->name, pc_status.pcop.name)) {
1578 switch(PCORB(pcop)->bit) {
1592 /*-----------------------------------------------------------------*/
1593 /* newpCode - create and return a newly initialized pCode */
1595 /* fixme - rename this */
1597 /* The purpose of this routine is to create a new Instruction */
1598 /* pCode. This is called by gen.c while the assembly code is being */
1602 /* PIC_OPCODE op - the assembly instruction we wish to create. */
1603 /* (note that the op is analogous to but not the */
1604 /* same thing as the opcode of the instruction.) */
1605 /* pCdoeOp *pcop - pointer to the operand of the instruction. */
1608 /* a pointer to the new malloc'd pCode is returned. */
1612 /*-----------------------------------------------------------------*/
1613 pCode *newpCode (PIC_OPCODE op, pCodeOp *pcop)
1615 pCodeInstruction *pci ;
1617 if(!mnemonics_initialized)
1618 pic14initMnemonics();
1620 pci = Safe_calloc(1, sizeof(pCodeInstruction));
1622 if((op>=0) && (op < MAX_PIC14MNEMONICS) && pic14Mnemonics[op]) {
1623 memcpy(pci, pic14Mnemonics[op], sizeof(pCodeInstruction));
1626 if(pci->inCond & PCC_EXAMINE_PCOP)
1627 pci->inCond |= RegCond(pcop);
1629 if(pci->outCond & PCC_EXAMINE_PCOP)
1630 pci->outCond |= RegCond(pcop);
1632 pci->pc.prev = pci->pc.next = NULL;
1633 return (pCode *)pci;
1636 fprintf(stderr, "pCode mnemonic error %s,%d\n",__FUNCTION__,__LINE__);
1642 /*-----------------------------------------------------------------*/
1643 /* newpCodeWild - create a "wild" as in wild card pCode */
1645 /* Wild pcodes are used during the peep hole optimizer to serve */
1646 /* as place holders for any instruction. When a snippet of code is */
1647 /* compared to a peep hole rule, the wild card opcode will match */
1648 /* any instruction. However, the optional operand and label are */
1649 /* additional qualifiers that must also be matched before the */
1650 /* line (of assembly code) is declared matched. Note that the */
1651 /* operand may be wild too. */
1653 /* Note, a wild instruction is specified just like a wild var: */
1654 /* %4 ; A wild instruction, */
1655 /* See the peeph.def file for additional examples */
1657 /*-----------------------------------------------------------------*/
1659 pCode *newpCodeWild(int pCodeID, pCodeOp *optional_operand, pCodeOp *optional_label)
1664 pcw = Safe_calloc(1,sizeof(pCodeWild));
1666 pcw->pci.pc.type = PC_WILD;
1667 pcw->pci.pc.prev = pcw->pci.pc.next = NULL;
1668 pcw->pci.from = pcw->pci.to = pcw->pci.label = NULL;
1669 pcw->pci.pc.pb = NULL;
1671 // pcw->pci.pc.analyze = genericAnalyze;
1672 pcw->pci.pc.destruct = genericDestruct;
1673 pcw->pci.pc.print = genericPrint;
1675 pcw->id = pCodeID; // this is the 'n' in %n
1676 pcw->operand = optional_operand;
1677 pcw->label = optional_label;
1679 pcw->mustBeBitSkipInst = 0;
1680 pcw->mustNotBeBitSkipInst = 0;
1681 pcw->invertBitSkipInst = 0;
1683 return ( (pCode *)pcw);
1687 /*-----------------------------------------------------------------*/
1688 /* newPcodeInlineP - create a new pCode from a char string */
1689 /*-----------------------------------------------------------------*/
1692 pCode *newpCodeInlineP(char *cP)
1697 pcc = Safe_calloc(1,sizeof(pCodeComment));
1699 pcc->pc.type = PC_INLINE;
1700 pcc->pc.prev = pcc->pc.next = NULL;
1701 //pcc->pc.from = pcc->pc.to = pcc->pc.label = NULL;
1704 // pcc->pc.analyze = genericAnalyze;
1705 pcc->pc.destruct = genericDestruct;
1706 pcc->pc.print = genericPrint;
1709 pcc->comment = Safe_strdup(cP);
1711 pcc->comment = NULL;
1713 return ( (pCode *)pcc);
1717 /*-----------------------------------------------------------------*/
1718 /* newPcodeCharP - create a new pCode from a char string */
1719 /*-----------------------------------------------------------------*/
1721 pCode *newpCodeCharP(char *cP)
1726 pcc = Safe_calloc(1,sizeof(pCodeComment));
1728 pcc->pc.type = PC_COMMENT;
1729 pcc->pc.prev = pcc->pc.next = NULL;
1730 //pcc->pc.from = pcc->pc.to = pcc->pc.label = NULL;
1733 // pcc->pc.analyze = genericAnalyze;
1734 pcc->pc.destruct = genericDestruct;
1735 pcc->pc.print = genericPrint;
1738 pcc->comment = Safe_strdup(cP);
1740 pcc->comment = NULL;
1742 return ( (pCode *)pcc);
1746 /*-----------------------------------------------------------------*/
1747 /* newpCodeFunction - */
1748 /*-----------------------------------------------------------------*/
1751 pCode *newpCodeFunction(char *mod,char *f)
1755 pcf = Safe_calloc(1,sizeof(pCodeFunction));
1756 //_ALLOC(pcf,sizeof(pCodeFunction));
1758 pcf->pc.type = PC_FUNCTION;
1759 pcf->pc.prev = pcf->pc.next = NULL;
1760 //pcf->pc.from = pcf->pc.to = pcf->pc.label = NULL;
1763 // pcf->pc.analyze = genericAnalyze;
1764 pcf->pc.destruct = genericDestruct;
1765 pcf->pc.print = pCodePrintFunction;
1770 //_ALLOC_ATOMIC(pcf->modname,strlen(mod)+1);
1771 pcf->modname = Safe_calloc(1,strlen(mod)+1);
1772 strcpy(pcf->modname,mod);
1774 pcf->modname = NULL;
1777 //_ALLOC_ATOMIC(pcf->fname,strlen(f)+1);
1778 pcf->fname = Safe_calloc(1,strlen(f)+1);
1779 strcpy(pcf->fname,f);
1783 return ( (pCode *)pcf);
1787 /*-----------------------------------------------------------------*/
1789 /*-----------------------------------------------------------------*/
1790 void destructpCodeFlow(pCode *pc)
1792 if(!pc || !isPCFL(pc))
1801 deleteSet(&PCFL(pc)->registers);
1802 deleteSet(&PCFL(pc)->from);
1803 deleteSet(&PCFL(pc)->to);
1808 pCode *newpCodeFlow(void )
1812 //_ALLOC(pcflow,sizeof(pCodeFlow));
1813 pcflow = Safe_calloc(1,sizeof(pCodeFlow));
1815 pcflow->pc.type = PC_FLOW;
1816 pcflow->pc.prev = pcflow->pc.next = NULL;
1817 pcflow->pc.pb = NULL;
1819 // pcflow->pc.analyze = genericAnalyze;
1820 pcflow->pc.destruct = destructpCodeFlow;
1821 pcflow->pc.print = genericPrint;
1823 pcflow->pc.seq = GpcFlowSeq++;
1825 pcflow->from = pcflow->to = NULL;
1827 pcflow->inCond = PCC_NONE;
1828 pcflow->outCond = PCC_NONE;
1830 pcflow->firstBank = -1;
1831 pcflow->lastBank = -1;
1833 pcflow->FromConflicts = 0;
1834 pcflow->ToConflicts = 0;
1838 pcflow->registers = newSet();
1840 return ( (pCode *)pcflow);
1844 /*-----------------------------------------------------------------*/
1845 /*-----------------------------------------------------------------*/
1846 pCodeFlowLink *newpCodeFlowLink(pCodeFlow *pcflow)
1848 pCodeFlowLink *pcflowLink;
1850 pcflowLink = Safe_calloc(1,sizeof(pCodeFlowLink));
1852 pcflowLink->pcflow = pcflow;
1853 pcflowLink->bank_conflict = 0;
1858 /*-----------------------------------------------------------------*/
1859 /* newpCodeCSource - create a new pCode Source Symbol */
1860 /*-----------------------------------------------------------------*/
1862 pCode *newpCodeCSource(int ln, char *f, char *l)
1867 pccs = Safe_calloc(1,sizeof(pCodeCSource));
1869 pccs->pc.type = PC_CSOURCE;
1870 pccs->pc.prev = pccs->pc.next = NULL;
1873 pccs->pc.destruct = genericDestruct;
1874 pccs->pc.print = genericPrint;
1876 pccs->line_number = ln;
1878 pccs->line = Safe_strdup(l);
1883 pccs->file_name = Safe_strdup(f);
1885 pccs->file_name = NULL;
1887 return ( (pCode *)pccs);
1890 /*-----------------------------------------------------------------*/
1891 /* pCodeLabelDestruct - free memory used by a label. */
1892 /*-----------------------------------------------------------------*/
1893 static void pCodeLabelDestruct(pCode *pc)
1899 if((pc->type == PC_LABEL) && PCL(pc)->label)
1900 free(PCL(pc)->label);
1906 pCode *newpCodeLabel(char *name, int key)
1912 pcl = Safe_calloc(1,sizeof(pCodeLabel) );
1914 pcl->pc.type = PC_LABEL;
1915 pcl->pc.prev = pcl->pc.next = NULL;
1916 //pcl->pc.from = pcl->pc.to = pcl->pc.label = NULL;
1919 // pcl->pc.analyze = genericAnalyze;
1920 pcl->pc.destruct = pCodeLabelDestruct;
1921 pcl->pc.print = pCodePrintLabel;
1927 sprintf(s,"_%05d_DS_",key);
1932 pcl->label = Safe_strdup(s);
1935 return ( (pCode *)pcl);
1940 /*-----------------------------------------------------------------*/
1941 /* newpBlock - create and return a pointer to a new pBlock */
1942 /*-----------------------------------------------------------------*/
1943 pBlock *newpBlock(void)
1948 PpB = Safe_calloc(1,sizeof(pBlock) );
1949 PpB->next = PpB->prev = NULL;
1951 PpB->function_entries = PpB->function_exits = PpB->function_calls = NULL;
1952 PpB->tregisters = NULL;
1954 PpB->FlowTree = NULL;
1960 /*-----------------------------------------------------------------*/
1961 /* newpCodeChain - create a new chain of pCodes */
1962 /*-----------------------------------------------------------------*
1964 * This function will create a new pBlock and the pointer to the
1965 * pCode that is passed in will be the first pCode in the block.
1966 *-----------------------------------------------------------------*/
1969 pBlock *newpCodeChain(memmap *cm,char c, pCode *pc)
1972 pBlock *pB = newpBlock();
1974 pB->pcHead = pB->pcTail = pc;
1981 /*-----------------------------------------------------------------*/
1982 /* newpCodeOpLabel - Create a new label given the key */
1983 /* Note, a negative key means that the label is part of wild card */
1984 /* (and hence a wild card label) used in the pCodePeep */
1985 /* optimizations). */
1986 /*-----------------------------------------------------------------*/
1988 pCodeOp *newpCodeOpLabel(char *name, int key)
1991 static int label_key=-1;
1995 pcop = Safe_calloc(1,sizeof(pCodeOpLabel) );
1996 pcop->type = PO_LABEL;
2001 sprintf(s=buffer,"_%05d_DS_",key);
2003 s = name, key = label_key--;
2006 pcop->name = Safe_strdup(s);
2008 ((pCodeOpLabel *)pcop)->key = key;
2013 /*-----------------------------------------------------------------*/
2014 /*-----------------------------------------------------------------*/
2015 pCodeOp *newpCodeOpLit(int lit)
2021 pcop = Safe_calloc(1,sizeof(pCodeOpLit) );
2022 pcop->type = PO_LITERAL;
2026 sprintf(s,"0x%02x",lit);
2028 pcop->name = Safe_strdup(s);
2031 ((pCodeOpLit *)pcop)->lit = lit;
2036 /*-----------------------------------------------------------------*/
2037 /*-----------------------------------------------------------------*/
2038 pCodeOp *newpCodeOpImmd(char *name, int offset, int index, int code_space)
2042 pcop = Safe_calloc(1,sizeof(pCodeOpImmd) );
2043 pcop->type = PO_IMMEDIATE;
2045 regs *r = dirregWithName(name);
2046 pcop->name = Safe_strdup(name);
2049 //fprintf(stderr, " newpCodeOpImmd reg %s exists\n",name);
2050 PCOI(pcop)->rIdx = r->rIdx;
2052 //fprintf(stderr, " newpCodeOpImmd reg %s doesn't exist\n",name);
2053 PCOI(pcop)->rIdx = -1;
2055 //fprintf(stderr,"%s %s %d\n",__FUNCTION__,name,offset);
2060 PCOI(pcop)->index = index;
2061 PCOI(pcop)->offset = offset;
2062 PCOI(pcop)->_const = code_space;
2067 /*-----------------------------------------------------------------*/
2068 /*-----------------------------------------------------------------*/
2069 pCodeOp *newpCodeOpWild(int id, pCodeWildBlock *pcwb, pCodeOp *subtype)
2075 if(!pcwb || !subtype) {
2076 fprintf(stderr, "Wild opcode declaration error: %s-%d\n",__FILE__,__LINE__);
2080 pcop = Safe_calloc(1,sizeof(pCodeOpWild));
2081 pcop->type = PO_WILD;
2082 sprintf(s,"%%%d",id);
2083 pcop->name = Safe_strdup(s);
2085 PCOW(pcop)->id = id;
2086 PCOW(pcop)->pcwb = pcwb;
2087 PCOW(pcop)->subtype = subtype;
2088 PCOW(pcop)->matched = NULL;
2093 /*-----------------------------------------------------------------*/
2094 /*-----------------------------------------------------------------*/
2095 pCodeOp *newpCodeOpBit(char *s, int bit, int inBitSpace)
2099 pcop = Safe_calloc(1,sizeof(pCodeOpRegBit) );
2100 pcop->type = PO_GPR_BIT;
2102 pcop->name = Safe_strdup(s);
2106 PCORB(pcop)->bit = bit;
2107 PCORB(pcop)->inBitSpace = inBitSpace;
2112 /*-----------------------------------------------------------------*
2113 * pCodeOp *newpCodeOpReg(int rIdx) - allocate a new register
2115 * If rIdx >=0 then a specific register from the set of registers
2116 * will be selected. If rIdx <0, then a new register will be searched
2118 *-----------------------------------------------------------------*/
2120 pCodeOp *newpCodeOpReg(int rIdx)
2124 pcop = Safe_calloc(1,sizeof(pCodeOpReg) );
2129 PCOR(pcop)->rIdx = rIdx;
2130 PCOR(pcop)->r = pic14_regWithIdx(rIdx);
2132 PCOR(pcop)->r = pic14_findFreeReg(REG_GPR);
2135 PCOR(pcop)->rIdx = PCOR(pcop)->r->rIdx;
2136 //fprintf(stderr, "newpcodeOpReg - rIdx = %d\n", PCOR(pcop)->r->rIdx);
2139 pcop->type = PCOR(pcop)->r->pc_type;
2144 pCodeOp *newpCodeOpRegFromStr(char *name)
2148 pcop = Safe_calloc(1,sizeof(pCodeOpReg) );
2149 PCOR(pcop)->r = allocRegByName(name, 1);
2150 PCOR(pcop)->rIdx = PCOR(pcop)->r->rIdx;
2151 pcop->type = PCOR(pcop)->r->pc_type;
2152 pcop->name = PCOR(pcop)->r->name;
2157 /*-----------------------------------------------------------------*/
2158 /*-----------------------------------------------------------------*/
2160 pCodeOp *newpCodeOp(char *name, PIC_OPTYPE type)
2167 pcop = newpCodeOpBit(name, -1,0);
2171 pcop = newpCodeOpLit(-1);
2175 pcop = newpCodeOpLabel(NULL,-1);
2178 pcop = newpCodeOpReg(-1);
2182 pcop = Safe_calloc(1,sizeof(pCodeOp) );
2185 pcop->name = Safe_strdup(name);
2193 /*-----------------------------------------------------------------*/
2194 /*-----------------------------------------------------------------*/
2195 void pCodeConstString(char *name, char *value)
2199 // fprintf(stderr, " %s %s %s\n",__FUNCTION__,name,value);
2204 pb = newpCodeChain(NULL, 'P',newpCodeCharP("; Starting pCode block"));
2208 sprintf(buffer,"; %s = %s",name,value);
2210 addpCode2pBlock(pb,newpCodeCharP(buffer));
2211 addpCode2pBlock(pb,newpCodeLabel(name,-1));
2214 addpCode2pBlock(pb,newpCode(POC_RETLW,newpCodeOpLit(*value)));
2220 /*-----------------------------------------------------------------*/
2221 /*-----------------------------------------------------------------*/
2222 void pCodeReadCodeTable(void)
2226 fprintf(stderr, " %s\n",__FUNCTION__);
2228 pb = newpCodeChain(NULL, 'P',newpCodeCharP("; Starting pCode block"));
2232 addpCode2pBlock(pb,newpCodeCharP("; ReadCodeTable - built in function"));
2233 addpCode2pBlock(pb,newpCodeCharP("; Inputs: temp1,temp2 = code pointer"));
2234 addpCode2pBlock(pb,newpCodeCharP("; Outpus: W (from RETLW at temp2:temp1)"));
2235 addpCode2pBlock(pb,newpCodeLabel("ReadCodeTable:",-1));
2237 addpCode2pBlock(pb,newpCode(POC_MOVFW,newpCodeOpRegFromStr("temp2")));
2238 addpCode2pBlock(pb,newpCode(POC_MOVWF,newpCodeOpRegFromStr("PCLATH")));
2239 addpCode2pBlock(pb,newpCode(POC_MOVFW,newpCodeOpRegFromStr("temp1")));
2240 addpCode2pBlock(pb,newpCode(POC_MOVWF,newpCodeOpRegFromStr("PCL")));
2245 /*-----------------------------------------------------------------*/
2246 /* addpCode2pBlock - place the pCode into the pBlock linked list */
2247 /*-----------------------------------------------------------------*/
2248 void addpCode2pBlock(pBlock *pb, pCode *pc)
2255 /* If this is the first pcode to be added to a block that
2256 * was initialized with a NULL pcode, then go ahead and
2257 * make this pcode the head and tail */
2258 pb->pcHead = pb->pcTail = pc;
2261 pb->pcTail->next = pc;
2263 pc->prev = pb->pcTail;
2270 /*-----------------------------------------------------------------*/
2271 /* addpBlock - place a pBlock into the pFile */
2272 /*-----------------------------------------------------------------*/
2273 void addpBlock(pBlock *pb)
2275 // fprintf(stderr," Adding pBlock: dbName =%c\n",getpBlock_dbName(pb));
2278 /* First time called, we'll pass through here. */
2279 //_ALLOC(the_pFile,sizeof(pFile));
2280 the_pFile = Safe_calloc(1,sizeof(pFile));
2281 the_pFile->pbHead = the_pFile->pbTail = pb;
2282 the_pFile->functions = NULL;
2286 the_pFile->pbTail->next = pb;
2287 pb->prev = the_pFile->pbTail;
2289 the_pFile->pbTail = pb;
2292 /*-----------------------------------------------------------------*/
2293 /* removepBlock - remove a pBlock from the pFile */
2294 /*-----------------------------------------------------------------*/
2295 void removepBlock(pBlock *pb)
2303 //fprintf(stderr," Removing pBlock: dbName =%c\n",getpBlock_dbName(pb));
2305 for(pbs = the_pFile->pbHead; pbs; pbs = pbs->next) {
2308 if(pbs == the_pFile->pbHead)
2309 the_pFile->pbHead = pbs->next;
2311 if (pbs == the_pFile->pbTail)
2312 the_pFile->pbTail = pbs->prev;
2315 pbs->next->prev = pbs->prev;
2318 pbs->prev->next = pbs->next;
2325 fprintf(stderr, "Warning: call to %s:%s didn't find pBlock\n",__FILE__,__FUNCTION__);
2329 /*-----------------------------------------------------------------*/
2330 /* printpCode - write the contents of a pCode to a file */
2331 /*-----------------------------------------------------------------*/
2332 void printpCode(FILE *of, pCode *pc)
2343 fprintf(of,"warning - unable to print pCode\n");
2346 /*-----------------------------------------------------------------*/
2347 /* printpBlock - write the contents of a pBlock to a file */
2348 /*-----------------------------------------------------------------*/
2349 void printpBlock(FILE *of, pBlock *pb)
2359 for(pc = pb->pcHead; pc; pc = pc->next)
2364 /*-----------------------------------------------------------------*/
2366 /* pCode processing */
2370 /*-----------------------------------------------------------------*/
2372 void unlinkpCode(pCode *pc)
2378 fprintf(stderr,"Unlinking: ");
2379 printpCode(stderr, pc);
2382 pc->prev->next = pc->next;
2384 pc->next->prev = pc->prev;
2386 pc->prev = pc->next = NULL;
2390 /*-----------------------------------------------------------------*/
2391 /*-----------------------------------------------------------------*/
2393 static void genericDestruct(pCode *pc)
2399 /* For instructions, tell the register (if there's one used)
2400 * that it's no longer needed */
2401 regs *reg = getRegFromInstruction(pc);
2403 deleteSetItem (&(reg->reglives.usedpCodes),pc);
2406 /* Instead of deleting the memory used by this pCode, mark
2407 * the object as bad so that if there's a pointer to this pCode
2408 * dangling around somewhere then (hopefully) when the type is
2409 * checked we'll catch it.
2414 addpCode2pBlock(pb_dead_pcodes, pc);
2421 /*-----------------------------------------------------------------*/
2422 /*-----------------------------------------------------------------*/
2423 void pBlockRegs(FILE *of, pBlock *pb)
2428 r = setFirstItem(pb->tregisters);
2430 r = setNextItem(pb->tregisters);
2435 /*-----------------------------------------------------------------*/
2436 /*-----------------------------------------------------------------*/
2437 char *get_op(pCodeOp *pcop,char *buffer, int size)
2442 int use_buffer = 1; // copy the string to the passed buffer pointer
2447 use_buffer = 0; // Don't bother copying the string to the buffer.
2451 switch(pcop->type) {
2455 SAFE_snprintf(&buffer,&size,"%s",PCOR(pcop)->r->name);
2458 return PCOR(pcop)->r->name;
2461 r = pic14_regWithIdx(PCOR(pcop)->r->rIdx);
2464 SAFE_snprintf(&buffer,&size,"%s",r->name);
2474 if(PCOI(pcop)->_const) {
2476 if( PCOI(pcop)->offset && PCOI(pcop)->offset<4) {
2477 SAFE_snprintf(&s,&size,"(((%s+%d) >> %d)&0xff)",
2480 8 * PCOI(pcop)->offset );
2482 SAFE_snprintf(&s,&size,"LOW(%s+%d)",pcop->name,PCOI(pcop)->index);
2485 if( PCOI(pcop)->index) { // && PCOI(pcc->pcop)->offset<4) {
2486 SAFE_snprintf(&s,&size,"(%s + %d)",
2488 PCOI(pcop)->index );
2490 SAFE_snprintf(&s,&size,"%s",pcop->name);
2497 //size = sizeof(buffer);
2498 if( PCOR(pcop)->instance) {
2499 SAFE_snprintf(&s,&size,"(%s + %d)",
2501 PCOR(pcop)->instance );
2502 //fprintf(stderr,"PO_DIR %s\n",buffer);
2504 SAFE_snprintf(&s,&size,"%s",pcop->name);
2510 SAFE_snprintf(&buffer,&size,"%s",pcop->name);
2519 return "NO operand";
2523 /*-----------------------------------------------------------------*/
2524 /*-----------------------------------------------------------------*/
2525 static char *get_op_from_instruction( pCodeInstruction *pcc)
2529 return get_op(pcc->pcop,NULL,0);
2531 return ("ERROR Null: "__FUNCTION__);
2535 /*-----------------------------------------------------------------*/
2536 /*-----------------------------------------------------------------*/
2537 static void pCodeOpPrint(FILE *of, pCodeOp *pcop)
2540 fprintf(of,"pcodeopprint- not implemented\n");
2543 /*-----------------------------------------------------------------*/
2544 /*-----------------------------------------------------------------*/
2545 char *pCode2str(char *str, int size, pCode *pc)
2553 SAFE_snprintf(&s,&size, "\t%s\t", PCI(pc)->mnemonic);
2555 if( (PCI(pc)->num_ops >= 1) && (PCI(pc)->pcop)) {
2557 if(PCI(pc)->isBitInst) {
2558 if(PCI(pc)->pcop->type == PO_GPR_BIT) {
2559 if( (((pCodeOpRegBit *)(PCI(pc)->pcop))->inBitSpace) )
2560 SAFE_snprintf(&s,&size,"(%s >> 3), (%s & 7)",
2561 PCI(pc)->pcop->name ,
2562 PCI(pc)->pcop->name );
2564 SAFE_snprintf(&s,&size,"%s,%d", get_op_from_instruction(PCI(pc)),
2565 (((pCodeOpRegBit *)(PCI(pc)->pcop))->bit ));
2566 } else if(PCI(pc)->pcop->type == PO_GPR_BIT) {
2567 SAFE_snprintf(&s,&size,"%s,%d", get_op_from_instruction(PCI(pc)),PCORB(PCI(pc)->pcop)->bit);
2569 SAFE_snprintf(&s,&size,"%s,0 ; ?bug", get_op_from_instruction(PCI(pc)));
2570 //PCI(pc)->pcop->t.bit );
2573 if(PCI(pc)->pcop->type == PO_GPR_BIT) {
2574 if( PCI(pc)->num_ops == 2)
2575 SAFE_snprintf(&s,&size,"(%s >> 3),%c",get_op_from_instruction(PCI(pc)),((PCI(pc)->isModReg) ? 'F':'W'));
2577 SAFE_snprintf(&s,&size,"(1 << (%s & 7))",get_op_from_instruction(PCI(pc)));
2580 SAFE_snprintf(&s,&size,"%s",get_op_from_instruction(PCI(pc)));
2582 if( PCI(pc)->num_ops == 2)
2583 SAFE_snprintf(&s,&size,",%c", ( (PCI(pc)->isModReg) ? 'F':'W'));
2591 /* assuming that comment ends with a \n */
2592 SAFE_snprintf(&s,&size,";%s", ((pCodeComment *)pc)->comment);
2596 /* assuming that inline code ends with a \n */
2597 SAFE_snprintf(&s,&size,"%s", ((pCodeComment *)pc)->comment);
2601 SAFE_snprintf(&s,&size,";label=%s, key=%d\n",PCL(pc)->label,PCL(pc)->key);
2604 SAFE_snprintf(&s,&size,";modname=%s,function=%s: id=%d\n",PCF(pc)->modname,PCF(pc)->fname);
2607 SAFE_snprintf(&s,&size,";\tWild opcode: id=%d\n",PCW(pc)->id);
2610 SAFE_snprintf(&s,&size,";\t--FLOW change\n");
2613 SAFE_snprintf(&s,&size,";#CSRC\t%s %d\n; %s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
2617 SAFE_snprintf(&s,&size,";A bad pCode is being used\n");
2624 /*-----------------------------------------------------------------*/
2625 /* genericPrint - the contents of a pCode to a file */
2626 /*-----------------------------------------------------------------*/
2627 static void genericPrint(FILE *of, pCode *pc)
2635 fprintf(of,";%s\n", ((pCodeComment *)pc)->comment);
2639 fprintf(of,"%s\n", ((pCodeComment *)pc)->comment);
2643 // If the opcode has a label, print that first
2645 pBranch *pbl = PCI(pc)->label;
2646 while(pbl && pbl->pc) {
2647 if(pbl->pc->type == PC_LABEL)
2648 pCodePrintLabel(of, pbl->pc);
2654 genericPrint(of,PCODE(PCI(pc)->cline));
2659 pCode2str(str, 256, pc);
2661 fprintf(of,"%s",str);
2665 fprintf(of, "\t;key=%03x",pc->seq);
2667 fprintf(of,",flow seq=%03x",PCI(pc)->pcflow->pc.seq);
2672 pBranch *dpb = pc->to; // debug
2674 switch ( dpb->pc->type) {
2676 fprintf(of, "\t;%s", PCI(dpb->pc)->mnemonic);
2679 fprintf(of, "\t;label %d", PCL(dpb->pc)->key);
2682 fprintf(of, "\t;function %s", ( (PCF(dpb->pc)->fname) ? (PCF(dpb->pc)->fname) : "[END]"));
2685 fprintf(of, "\t;flow");
2699 fprintf(of,";\tWild opcode: id=%d\n",PCW(pc)->id);
2700 if(PCW(pc)->pci.label)
2701 pCodePrintLabel(of, PCW(pc)->pci.label->pc);
2703 if(PCW(pc)->operand) {
2704 fprintf(of,";\toperand ");
2705 pCodeOpPrint(of,PCW(pc)->operand );
2711 fprintf(of,";<>Start of new flow, seq=%d\n",pc->seq);
2715 fprintf(of,";#CSRC\t%s %d\n; %s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
2719 fprintf(of,"unknown pCode type %d\n",pc->type);
2724 /*-----------------------------------------------------------------*/
2725 /* pCodePrintFunction - prints function begin/end */
2726 /*-----------------------------------------------------------------*/
2728 static void pCodePrintFunction(FILE *of, pCode *pc)
2734 if( ((pCodeFunction *)pc)->modname)
2735 fprintf(of,"F_%s",((pCodeFunction *)pc)->modname);
2737 if(PCF(pc)->fname) {
2738 pBranch *exits = PCF(pc)->to;
2740 fprintf(of,"%s\t;Function start\n",PCF(pc)->fname);
2743 exits = exits->next;
2746 fprintf(of,"; %d exit point%c\n",i, ((i==1) ? ' ':'s'));
2749 if((PCF(pc)->from &&
2750 PCF(pc)->from->pc->type == PC_FUNCTION &&
2751 PCF(PCF(pc)->from->pc)->fname) )
2752 fprintf(of,"; exit point of %s\n",PCF(PCF(pc)->from->pc)->fname);
2754 fprintf(of,"; exit point [can't find entry point]\n");
2757 /*-----------------------------------------------------------------*/
2758 /* pCodePrintLabel - prints label */
2759 /*-----------------------------------------------------------------*/
2761 static void pCodePrintLabel(FILE *of, pCode *pc)
2768 fprintf(of,"%s\n",PCL(pc)->label);
2769 else if (PCL(pc)->key >=0)
2770 fprintf(of,"_%05d_DS_:\n",PCL(pc)->key);
2772 fprintf(of,";wild card label: id=%d\n",-PCL(pc)->key);
2775 /*-----------------------------------------------------------------*/
2776 /* unlinkpCodeFromBranch - Search for a label in a pBranch and */
2777 /* remove it if it is found. */
2778 /*-----------------------------------------------------------------*/
2779 static void unlinkpCodeFromBranch(pCode *pcl , pCode *pc)
2786 if(pcl->type == PC_OPCODE)
2787 b = PCI(pcl)->label;
2789 fprintf(stderr, "LINE %d. can't unlink from non opcode\n",__LINE__);
2794 //fprintf (stderr, "%s \n",__FUNCTION__);
2795 //pcl->print(stderr,pcl);
2796 //pc->print(stderr,pc);
2799 //fprintf (stderr, "found label\n");
2803 bprev->next = b->next; /* Not first pCode in chain */
2807 PCI(pcl)->label = b->next; /* First pCode in chain */
2810 return; /* A label can't occur more than once */
2818 /*-----------------------------------------------------------------*/
2819 /*-----------------------------------------------------------------*/
2820 pBranch * pBranchAppend(pBranch *h, pBranch *n)
2839 /*-----------------------------------------------------------------*/
2840 /* pBranchLink - given two pcodes, this function will link them */
2841 /* together through their pBranches */
2842 /*-----------------------------------------------------------------*/
2843 static void pBranchLink(pCodeFunction *f, pCodeFunction *t)
2847 // Declare a new branch object for the 'from' pCode.
2849 //_ALLOC(b,sizeof(pBranch));
2850 b = Safe_calloc(1,sizeof(pBranch));
2851 b->pc = PCODE(t); // The link to the 'to' pCode.
2854 f->to = pBranchAppend(f->to,b);
2856 // Now do the same for the 'to' pCode.
2858 //_ALLOC(b,sizeof(pBranch));
2859 b = Safe_calloc(1,sizeof(pBranch));
2863 t->from = pBranchAppend(t->from,b);
2868 /*-----------------------------------------------------------------*/
2869 /* pBranchFind - find the pBranch in a pBranch chain that contains */
2871 /*-----------------------------------------------------------------*/
2872 static pBranch *pBranchFind(pBranch *pb,pCode *pc)
2885 /*-----------------------------------------------------------------*/
2886 /* pCodeUnlink - Unlink the given pCode from its pCode chain. */
2887 /*-----------------------------------------------------------------*/
2888 static void pCodeUnlink(pCode *pc)
2893 if(!pc->prev || !pc->next) {
2894 fprintf(stderr,"unlinking bad pCode in %s:%d\n",__FILE__,__LINE__);
2898 /* first remove the pCode from the chain */
2899 pc->prev->next = pc->next;
2900 pc->next->prev = pc->prev;
2902 /* Now for the hard part... */
2904 /* Remove the branches */
2908 pc1 = pb1->pc; /* Get the pCode that branches to the
2909 * one we're unlinking */
2911 /* search for the link back to this pCode (the one we're
2913 if(pb2 = pBranchFind(pc1->to,pc)) {
2914 pb2->pc = pc->to->pc; // make the replacement
2916 /* if the pCode we're unlinking contains multiple 'to'
2917 * branches (e.g. this a skip instruction) then we need
2918 * to copy these extra branches to the chain. */
2920 pBranchAppend(pb2, pc->to->next);
2929 /*-----------------------------------------------------------------*/
2930 /*-----------------------------------------------------------------*/
2932 static void genericAnalyze(pCode *pc)
2942 // Go through the pCodes that are in pCode chain and link
2943 // them together through the pBranches. Note, the pCodes
2944 // are linked together as a contiguous stream like the
2945 // assembly source code lines. The linking here mimics this
2946 // except that comments are not linked in.
2948 pCode *npc = pc->next;
2950 if(npc->type == PC_OPCODE || npc->type == PC_LABEL) {
2951 pBranchLink(pc,npc);
2956 /* reached the end of the pcode chain without finding
2957 * an instruction we could link to. */
2961 fprintf(stderr,"analyze PC_FLOW\n");
2965 fprintf(stderr,,";A bad pCode is being used\n");
2971 /*-----------------------------------------------------------------*/
2972 /*-----------------------------------------------------------------*/
2973 int compareLabel(pCode *pc, pCodeOpLabel *pcop_label)
2977 if(pc->type == PC_LABEL) {
2978 if( ((pCodeLabel *)pc)->key == pcop_label->key)
2981 if(pc->type == PC_OPCODE) {
2982 pbr = PCI(pc)->label;
2984 if(pbr->pc->type == PC_LABEL) {
2985 if( ((pCodeLabel *)(pbr->pc))->key == pcop_label->key)
2995 /*-----------------------------------------------------------------*/
2996 /*-----------------------------------------------------------------*/
2997 int checkLabel(pCode *pc)
3001 if(pc && isPCI(pc)) {
3002 pbr = PCI(pc)->label;
3004 if(isPCL(pbr->pc) && (PCL(pbr->pc)->key >= 0))
3014 /*-----------------------------------------------------------------*/
3015 /* findLabelinpBlock - Search the pCode for a particular label */
3016 /*-----------------------------------------------------------------*/
3017 pCode * findLabelinpBlock(pBlock *pb,pCodeOpLabel *pcop_label)
3024 for(pc = pb->pcHead; pc; pc = pc->next)
3025 if(compareLabel(pc,pcop_label))
3031 /*-----------------------------------------------------------------*/
3032 /* findLabel - Search the pCode for a particular label */
3033 /*-----------------------------------------------------------------*/
3034 pCode * findLabel(pCodeOpLabel *pcop_label)
3042 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
3043 if( (pc = findLabelinpBlock(pb,pcop_label)) != NULL)
3047 fprintf(stderr,"Couldn't find label %s", pcop_label->pcop.name);
3051 /*-----------------------------------------------------------------*/
3052 /* findNextpCode - given a pCode, find the next of type 'pct' */
3053 /* in the linked list */
3054 /*-----------------------------------------------------------------*/
3055 pCode * findNextpCode(pCode *pc, PC_TYPE pct)
3068 /*-----------------------------------------------------------------*/
3069 /* findPrevpCode - given a pCode, find the previous of type 'pct' */
3070 /* in the linked list */
3071 /*-----------------------------------------------------------------*/
3072 pCode * findPrevpCode(pCode *pc, PC_TYPE pct)
3084 /*-----------------------------------------------------------------*/
3085 /* findNextInstruction - given a pCode, find the next instruction */
3086 /* in the linked list */
3087 /*-----------------------------------------------------------------*/
3088 pCode * findNextInstruction(pCode *pci)
3093 if((pc->type == PC_OPCODE) || (pc->type == PC_WILD))
3097 fprintf(stderr,"findNextInstruction: ");
3098 printpCode(stderr, pc);
3103 //fprintf(stderr,"Couldn't find instruction\n");
3107 /*-----------------------------------------------------------------*/
3108 /* findNextInstruction - given a pCode, find the next instruction */
3109 /* in the linked list */
3110 /*-----------------------------------------------------------------*/
3111 pCode * findPrevInstruction(pCode *pci)
3113 return findPrevpCode(pci, PC_OPCODE);
3116 /*-----------------------------------------------------------------*/
3117 /* findFunctionEnd - given a pCode find the end of the function */
3118 /* that contains it */
3119 /*-----------------------------------------------------------------*/
3120 pCode * findFunctionEnd(pCode *pc)
3124 if(pc->type == PC_FUNCTION && !(PCF(pc)->fname))
3130 fprintf(stderr,"Couldn't find function end\n");
3135 /*-----------------------------------------------------------------*/
3136 /* AnalyzeLabel - if the pCode is a label, then merge it with the */
3137 /* instruction with which it is associated. */
3138 /*-----------------------------------------------------------------*/
3139 static void AnalyzeLabel(pCode *pc)
3148 static void AnalyzeGOTO(pCode *pc)
3151 pBranchLink(pc,findLabel( (pCodeOpLabel *) (PCI(pc)->pcop) ));
3155 static void AnalyzeSKIP(pCode *pc)
3158 pBranchLink(pc,findNextInstruction(pc->next));
3159 pBranchLink(pc,findNextInstruction(pc->next->next));
3163 static void AnalyzeRETURN(pCode *pc)
3166 // branch_link(pc,findFunctionEnd(pc->next));
3172 /*-----------------------------------------------------------------*/
3173 /*-----------------------------------------------------------------*/
3174 regs * getRegFromInstruction(pCode *pc)
3180 PCI(pc)->num_ops == 0 )
3183 switch(PCI(pc)->pcop->type) {
3186 return PCOR(PCI(pc)->pcop)->r;
3188 // return typeRegWithIdx (PCOR(PCI(pc)->pcop)->rIdx, REG_SFR, 0);
3192 //fprintf(stderr, "getRegFromInstruction - bit or temp\n");
3193 return PCOR(PCI(pc)->pcop)->r;
3196 if(PCOI(PCI(pc)->pcop)->r)
3197 return (PCOI(PCI(pc)->pcop)->r);
3199 //fprintf(stderr, "getRegFromInstruction - immediate\n");
3200 return dirregWithName(PCI(pc)->pcop->name);
3201 //return NULL; // PCOR(PCI(pc)->pcop)->r;
3204 return PCOR(PCI(pc)->pcop)->r;
3207 //fprintf(stderr, "getRegFromInstruction - dir\n");
3208 return PCOR(PCI(pc)->pcop)->r;
3210 //fprintf(stderr, "getRegFromInstruction - literal\n");
3214 //fprintf(stderr, "getRegFromInstruction - unknown reg type %d\n",PCI(pc)->pcop->type);
3215 //genericPrint(stderr, pc);
3223 /*-----------------------------------------------------------------*/
3224 /*-----------------------------------------------------------------*/
3226 void AnalyzepBlock(pBlock *pb)
3233 /* Find all of the registers used in this pBlock
3234 * by looking at each instruction and examining it's
3237 for(pc = pb->pcHead; pc; pc = pc->next) {
3239 /* Is this an instruction with operands? */
3240 if(pc->type == PC_OPCODE && PCI(pc)->pcop) {
3242 if(PCI(pc)->pcop->type == PO_GPR_TEMP) {
3244 /* Loop through all of the registers declared so far in
3245 this block and see if we find this one there */
3247 regs *r = setFirstItem(pb->tregisters);
3250 if(r->rIdx == PCOR(PCI(pc)->pcop)->r->rIdx) {
3251 PCOR(PCI(pc)->pcop)->r = r;
3254 r = setNextItem(pb->tregisters);
3258 /* register wasn't found */
3259 //r = Safe_calloc(1, sizeof(regs));
3260 //memcpy(r,PCOR(PCI(pc)->pcop)->r, sizeof(regs));
3261 //addSet(&pb->tregisters, r);
3262 addSet(&pb->tregisters, PCOR(PCI(pc)->pcop)->r);
3263 //PCOR(PCI(pc)->pcop)->r = r;
3264 //fprintf(stderr,"added register to pblock: reg %d\n",r->rIdx);
3266 fprintf(stderr,"found register in pblock: reg %d\n",r->rIdx);
3269 if(PCI(pc)->pcop->type == PO_GPR_REGISTER) {
3270 if(PCOR(PCI(pc)->pcop)->r) {
3271 pic14_allocWithIdx (PCOR(PCI(pc)->pcop)->r->rIdx);
3272 DFPRINTF((stderr,"found register in pblock: reg 0x%x\n",PCOR(PCI(pc)->pcop)->r->rIdx));
3274 if(PCI(pc)->pcop->name)
3275 fprintf(stderr,"ERROR: %s is a NULL register\n",PCI(pc)->pcop->name );
3277 fprintf(stderr,"ERROR: NULL register\n");
3286 /*-----------------------------------------------------------------*/
3288 /*-----------------------------------------------------------------*/
3289 #define PCI_HAS_LABEL(x) ((x) && (PCI(x)->label != NULL))
3291 void InsertpFlow(pCode *pc, pCode **pflow)
3294 PCFL(*pflow)->end = pc;
3296 if(!pc || !pc->next)
3299 *pflow = newpCodeFlow();
3300 pCodeInsertAfter(pc, *pflow);
3303 /*-----------------------------------------------------------------*/
3304 /* BuildFlow(pBlock *pb) - examine the code in a pBlock and build */
3305 /* the flow blocks. */
3307 * BuildFlow inserts pCodeFlow objects into the pCode chain at each
3308 * point the instruction flow changes.
3310 /*-----------------------------------------------------------------*/
3311 void BuildFlow(pBlock *pb)
3314 pCode *last_pci=NULL;
3321 //fprintf (stderr,"build flow start seq %d ",GpcFlowSeq);
3322 /* Insert a pCodeFlow object at the beginning of a pBlock */
3324 InsertpFlow(pb->pcHead, &pflow);
3326 //pflow = newpCodeFlow(); /* Create a new Flow object */
3327 //pflow->next = pb->pcHead; /* Make the current head the next object */
3328 //pb->pcHead->prev = pflow; /* let the current head point back to the flow object */
3329 //pb->pcHead = pflow; /* Make the Flow object the head */
3332 for( pc = findNextInstruction(pb->pcHead);
3334 pc=findNextInstruction(pc)) {
3337 PCI(pc)->pcflow = PCFL(pflow);
3339 //fprintf(stderr," build: ");
3340 //pflow->print(stderr,pflow);
3342 if( PCI(pc)->isSkip) {
3344 /* The two instructions immediately following this one
3345 * mark the beginning of a new flow segment */
3347 while(pc && PCI(pc)->isSkip) {
3349 PCI(pc)->pcflow = PCFL(pflow);
3353 InsertpFlow(pc, &pflow);
3354 pc=findNextInstruction(pc->next);
3362 PCI(pc)->pcflow = PCFL(pflow);
3364 InsertpFlow(pc, &pflow);
3366 } else if ( PCI(pc)->isBranch && !checkLabel(findNextInstruction(pc->next))) {
3368 InsertpFlow(pc, &pflow);
3371 } else if (checkLabel(pc)) { //(PCI_HAS_LABEL(pc)) {
3373 /* This instruction marks the beginning of a
3374 * new flow segment */
3378 InsertpFlow(findPrevInstruction(pc->prev), &pflow);
3380 PCI(pc)->pcflow = PCFL(pflow);
3387 //fprintf (stderr,",end seq %d",GpcFlowSeq);
3389 PCFL(pflow)->end = pb->pcTail;
3392 /*-------------------------------------------------------------------*/
3393 /* unBuildFlow(pBlock *pb) - examine the code in a pBlock and build */
3394 /* the flow blocks. */
3396 * unBuildFlow removes pCodeFlow objects from a pCode chain
3398 /*-----------------------------------------------------------------*/
3399 void unBuildFlow(pBlock *pb)
3414 if(PCI(pc)->pcflow) {
3415 //free(PCI(pc)->pcflow);
3416 PCI(pc)->pcflow = NULL;
3419 } else if(isPCFL(pc) )
3428 /*-----------------------------------------------------------------*/
3429 /*-----------------------------------------------------------------*/
3430 void dumpCond(int cond)
3433 static char *pcc_str[] = {
3447 int ncond = sizeof(pcc_str) / sizeof(char *);
3450 fprintf(stderr, "0x%04X\n",cond);
3452 for(i=0,j=1; i<ncond; i++, j<<=1)
3454 fprintf(stderr, " %s\n",pcc_str[i]);
3458 /*-----------------------------------------------------------------*/
3459 /*-----------------------------------------------------------------*/
3460 void FlowStats(pCodeFlow *pcflow)
3468 fprintf(stderr, " FlowStats - flow block (seq=%d)\n", pcflow->pc.seq);
3470 pc = findNextpCode(PCODE(pcflow), PC_OPCODE);
3473 fprintf(stderr, " FlowStats - empty flow (seq=%d)\n", pcflow->pc.seq);
3478 fprintf(stderr, " FlowStats inCond: ");
3479 dumpCond(pcflow->inCond);
3480 fprintf(stderr, " FlowStats outCond: ");
3481 dumpCond(pcflow->outCond);
3485 /*-----------------------------------------------------------------*
3486 * int isBankInstruction(pCode *pc) - examine the pCode *pc to determine
3487 * if it affects the banking bits.
3489 * return: -1 == Banking bits are unaffected by this pCode.
3491 * return: > 0 == Banking bits are affected.
3493 * If the banking bits are affected, then the returned value describes
3494 * which bits are affected and how they're affected. The lower half
3495 * of the integer maps to the bits that are affected, the upper half
3496 * to whether they're set or cleared.
3498 *-----------------------------------------------------------------*/
3499 #define SET_BANK_BIT (1 << 16)
3500 #define CLR_BANK_BIT 0
3502 int isBankInstruction(pCode *pc)
3510 if( ( (reg = getRegFromInstruction(pc)) != NULL) && isSTATUS_REG(reg)) {
3512 /* Check to see if the register banks are changing */
3513 if(PCI(pc)->isModReg) {
3515 pCodeOp *pcop = PCI(pc)->pcop;
3516 switch(PCI(pc)->op) {
3519 if(PCORB(pcop)->bit == PIC_RP0_BIT) {
3520 //fprintf(stderr, " isBankInstruction - Set RP0\n");
3521 return SET_BANK_BIT | PIC_RP0_BIT;
3524 if(PCORB(pcop)->bit == PIC_RP1_BIT) {
3525 //fprintf(stderr, " isBankInstruction - Set RP1\n");
3526 return CLR_BANK_BIT | PIC_RP0_BIT;
3531 if(PCORB(pcop)->bit == PIC_RP0_BIT) {
3532 //fprintf(stderr, " isBankInstruction - Clr RP0\n");
3533 return CLR_BANK_BIT | PIC_RP1_BIT;
3535 if(PCORB(pcop)->bit == PIC_RP1_BIT) {
3536 //fprintf(stderr, " isBankInstruction - Clr RP1\n");
3537 return CLR_BANK_BIT | PIC_RP1_BIT;
3541 //fprintf(stderr, " isBankInstruction - Status register is getting Modified by:\n");
3542 //genericPrint(stderr, pc);
3553 /*-----------------------------------------------------------------*/
3554 /*-----------------------------------------------------------------*/
3555 void FillFlow(pCodeFlow *pcflow)
3564 // fprintf(stderr, " FillFlow - flow block (seq=%d)\n", pcflow->pc.seq);
3566 pc = findNextpCode(PCODE(pcflow), PC_OPCODE);
3569 //fprintf(stderr, " FillFlow - empty flow (seq=%d)\n", pcflow->pc.seq);
3576 isBankInstruction(pc);
3578 } while (pc && (pc != pcflow->end) && !isPCFL(pc));
3582 fprintf(stderr, " FillFlow - Bad end of flow\n");
3584 fprintf(stderr, " FillFlow - Ending flow with\n ");
3585 pc->print(stderr,pc);
3588 fprintf(stderr, " FillFlow inCond: ");
3589 dumpCond(pcflow->inCond);
3590 fprintf(stderr, " FillFlow outCond: ");
3591 dumpCond(pcflow->outCond);
3595 /*-----------------------------------------------------------------*/
3596 /*-----------------------------------------------------------------*/
3597 void LinkFlow_pCode(pCodeInstruction *from, pCodeInstruction *to)
3599 pCodeFlowLink *fromLink, *toLink;
3601 if(!from || !to || !to->pcflow || !from->pcflow)
3604 fromLink = newpCodeFlowLink(from->pcflow);
3605 toLink = newpCodeFlowLink(to->pcflow);
3607 addSetIfnotP(&(from->pcflow->to), toLink); //to->pcflow);
3608 addSetIfnotP(&(to->pcflow->from), fromLink); //from->pcflow);
3612 /*-----------------------------------------------------------------*
3613 * void LinkFlow(pBlock *pb)
3615 * In BuildFlow, the PIC code has been partitioned into contiguous
3616 * non-branching segments. In LinkFlow, we determine the execution
3617 * order of these segments. For example, if one of the segments ends
3618 * with a skip, then we know that there are two possible flow segments
3619 * to which control may be passed.
3620 *-----------------------------------------------------------------*/
3621 void LinkFlow(pBlock *pb)
3627 //fprintf(stderr,"linkflow \n");
3629 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
3631 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
3634 fprintf(stderr, "LinkFlow - pcflow is not a flow object ");
3636 //fprintf(stderr," link: ");
3637 //pcflow->print(stderr,pcflow);
3639 //FillFlow(PCFL(pcflow));
3641 pc = PCFL(pcflow)->end;
3643 //fprintf(stderr, "LinkFlow - flow block (seq=%d) ", pcflow->seq);
3644 if(isPCI_SKIP(pc)) {
3645 //fprintf(stderr, "ends with skip\n");
3646 //pc->print(stderr,pc);
3647 pct=findNextInstruction(pc->next);
3648 LinkFlow_pCode(PCI(pc),PCI(pct));
3649 pct=findNextInstruction(pct->next);
3650 LinkFlow_pCode(PCI(pc),PCI(pct));
3654 if(isPCI_BRANCH(pc)) {
3655 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
3657 //fprintf(stderr, "ends with branch\n ");
3658 //pc->print(stderr,pc);
3660 if(!(pcol && isPCOLAB(pcol))) {
3661 if((PCI(pc)->op != POC_RETLW) && (PCI(pc)->op != POC_RETURN) && (PCI(pc)->op != POC_CALL)) {
3662 pc->print(stderr,pc);
3663 fprintf(stderr, "ERROR: %s, branch instruction doesn't have label\n",__FUNCTION__);
3668 if( (pct = findLabelinpBlock(pb,pcol)) != NULL)
3669 LinkFlow_pCode(PCI(pc),PCI(pct));
3671 fprintf(stderr, "ERROR: %s, couldn't find label\n",__FUNCTION__);
3677 //fprintf(stderr, "ends with non-branching instruction:\n");
3678 //pc->print(stderr,pc);
3680 LinkFlow_pCode(PCI(pc),PCI(findNextInstruction(pc->next)));
3686 //fprintf(stderr, "ends with unknown\n");
3687 //pc->print(stderr,pc);
3691 //fprintf(stderr, "ends with nothing: ERROR\n");
3695 /*-----------------------------------------------------------------*/
3696 /*-----------------------------------------------------------------*/
3698 /*-----------------------------------------------------------------*/
3699 /*-----------------------------------------------------------------*/
3700 int isPCinFlow(pCode *pc, pCode *pcflow)
3706 if(!isPCI(pc) || !PCI(pc)->pcflow || !isPCFL(pcflow) )
3709 if( PCI(pc)->pcflow->pc.seq == pcflow->seq)
3715 /*-----------------------------------------------------------------*/
3716 /*-----------------------------------------------------------------*/
3717 void BanksUsedFlow2(pCode *pcflow)
3726 if(!isPCFL(pcflow)) {
3727 fprintf(stderr, "BanksUsed - pcflow is not a flow object ");
3731 pc = findNextInstruction(pcflow->next);
3733 PCFL(pcflow)->lastBank = -1;
3735 while(isPCinFlow(pc,pcflow)) {
3737 int bank_selected = isBankInstruction(pc);
3739 //if(PCI(pc)->pcflow)
3740 //fprintf(stderr,"BanksUsedFlow2, looking at seq %d\n",PCI(pc)->pcflow->pc.seq);
3742 if(bank_selected > 0) {
3743 //fprintf(stderr,"BanksUsed - mucking with bank %d\n",bank_selected);
3745 /* This instruction is modifying banking bits before accessing registers */
3747 PCFL(pcflow)->firstBank = -1;
3749 if(PCFL(pcflow)->lastBank == -1)
3750 PCFL(pcflow)->lastBank = 0;
3752 bank = (1 << (bank_selected & (PIC_RP0_BIT | PIC_RP1_BIT)));
3753 if(bank_selected & SET_BANK_BIT)
3754 PCFL(pcflow)->lastBank |= bank;
3758 reg = getRegFromInstruction(pc);
3760 if(reg && !isREGinBank(reg, bank)) {
3761 int allbanks = REGallBanks(reg);
3763 PCFL(pcflow)->firstBank = allbanks;
3765 PCFL(pcflow)->lastBank = allbanks;
3772 pc = findNextInstruction(pc->next);
3775 // fprintf(stderr,"BanksUsedFlow2 flow seq=%3d, first bank = 0x%03x, Last bank 0x%03x\n",
3776 // pcflow->seq,PCFL(pcflow)->firstBank,PCFL(pcflow)->lastBank);
3781 /*-----------------------------------------------------------------*/
3782 /*-----------------------------------------------------------------*/
3783 void BanksUsedFlow(pBlock *pb)
3788 //pb->pcHead->print(stderr, pb->pcHead);
3790 pcflow = findNextpCode(pb->pcHead, PC_FLOW);
3791 //pcflow->print(stderr,pcflow);
3793 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
3795 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
3797 BanksUsedFlow2(pcflow);
3803 /*-----------------------------------------------------------------*/
3804 /*-----------------------------------------------------------------*/
3805 void insertBankSwitch(pCode *pc, int Set_Clear, int RP_BankBit)
3813 new_pc = newpCode(POC_CLRF, popCopyReg(&pc_status));
3815 new_pc = newpCode((Set_Clear ? POC_BSF : POC_BCF),
3816 popCopyGPR2Bit(PCOP(&pc_status),RP_BankBit));
3818 pCodeInsertAfter(pc->prev, new_pc);
3820 /* Move the label, if there is one */
3822 if(PCI(pc)->label) {
3823 PCI(new_pc)->label = PCI(pc)->label;
3824 PCI(pc)->label = NULL;
3827 /* The new instruction has the same pcflow block */
3828 PCI(new_pc)->pcflow = PCI(pc)->pcflow;
3831 /*-----------------------------------------------------------------*/
3832 /*-----------------------------------------------------------------*/
3833 void FixRegisterBankingInFlow(pCodeFlow *pcfl, int cur_bank)
3844 pc = findNextInstruction(pcfl->pc.next);
3846 while(isPCinFlow(pc,PCODE(pcfl))) {
3849 reg = getRegFromInstruction(pc);
3852 fprintf(stderr, " %s ",reg->name);
3853 fprintf(stderr, "addr = 0x%03x, bank = %d\n",reg->address,REG_BANK(reg));
3858 if(reg && REG_BANK(reg)!=cur_bank) {
3859 /* Examine the instruction before this one to make sure it is
3860 * not a skip type instruction */
3861 pcprev = findPrevpCode(pc->prev, PC_OPCODE);
3862 if(!pcprev || (pcprev && !isPCI_SKIP(pcprev))) {
3863 int b = cur_bank ^ REG_BANK(reg);
3865 //fprintf(stderr, "Cool! can switch banks\n");
3866 cur_bank = REG_BANK(reg);
3871 insertBankSwitch(pc, cur_bank&1, PIC_RP0_BIT);
3874 insertBankSwitch(pc, cur_bank&2, PIC_RP1_BIT);
3875 insertBankSwitch(pc, cur_bank&2, PIC_RP1_BIT);
3879 insertBankSwitch(pc, cur_bank&1, PIC_RP0_BIT);
3880 insertBankSwitch(pc, cur_bank&2, PIC_RP1_BIT);
3882 insertBankSwitch(pc, -1, -1);
3885 new_pc = newpCode(((cur_bank&1) ? POC_BSF : POC_BCF),
3886 popCopyGPR2Bit(PCOP(&pc_status),PIC_RP0_BIT));
3887 pCodeInsertAfter(pc->prev, new_pc);
3888 if(PCI(pc)->label) {
3889 PCI(new_pc)->label = PCI(pc)->label;
3890 PCI(pc)->label = NULL;
3894 new_pc = newpCode(((cur_bank&1) ? POC_BCF : POC_BSF),
3895 popCopyGPR2Bit(PCOP(&pc_status),PIC_RP0_BIT));
3896 pCodeInsertAfter(pc, new_pc);
3902 //fprintf(stderr, "Bummer can't switch banks\n");
3908 pc = findNextInstruction(pc->next);
3912 if(pcprev && cur_bank) {
3913 /* Brute force - make sure that we point to bank 0 at the
3914 * end of each flow block */
3915 new_pc = newpCode(POC_BCF,
3916 popCopyGPR2Bit(PCOP(&pc_status),PIC_RP0_BIT));
3917 pCodeInsertAfter(pcprev, new_pc);
3923 /*-----------------------------------------------------------------*/
3924 /*int compareBankFlow - compare the banking requirements between */
3926 /*-----------------------------------------------------------------*/
3927 int compareBankFlow(pCodeFlow *pcflow, pCodeFlowLink *pcflowLink, int toORfrom)
3930 if(!pcflow || !pcflowLink || !pcflowLink->pcflow)
3933 if(!isPCFL(pcflow) || !isPCFL(pcflowLink->pcflow))
3936 if(pcflow->firstBank == -1)
3940 if(pcflowLink->pcflow->firstBank == -1) {
3941 pCodeFlowLink *pctl = setFirstItem( toORfrom ?
3942 pcflowLink->pcflow->to :
3943 pcflowLink->pcflow->from);
3944 return compareBankFlow(pcflow, pctl, toORfrom);
3948 if(pcflow->lastBank == pcflowLink->pcflow->firstBank)
3951 pcflowLink->bank_conflict++;
3952 pcflowLink->pcflow->FromConflicts++;
3953 pcflow->ToConflicts++;
3956 if(pcflow->firstBank == pcflowLink->pcflow->lastBank)
3959 pcflowLink->bank_conflict++;
3960 pcflowLink->pcflow->ToConflicts++;
3961 pcflow->FromConflicts++;
3965 fprintf(stderr,"compare flow found conflict: seq %d from conflicts %d, to conflicts %d\n",
3966 pcflowLink->pcflow->pc.seq,
3967 pcflowLink->pcflow->FromConflicts,
3968 pcflowLink->pcflow->ToConflicts);
3973 /*-----------------------------------------------------------------*/
3974 /*-----------------------------------------------------------------*/
3975 void FixBankFlow(pBlock *pb)
3979 pCodeFlowLink *pcfl;
3981 pCode *pcflow_max_To=NULL;
3982 pCode *pcflow_max_From=NULL;
3983 int max_ToConflicts=0;
3984 int max_FromConflicts=0;
3986 //fprintf(stderr,"Fix Bank flow \n");
3987 pcflow = findNextpCode(pb->pcHead, PC_FLOW);
3991 First loop through all of the flow objects in this pcode block
3992 and fix the ones that have banking conflicts between the
3996 //fprintf(stderr, "FixBankFlow - Phase 1\n");
3998 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4000 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4002 if(!isPCFL(pcflow)) {
4003 fprintf(stderr, "FixBankFlow - pcflow is not a flow object ");
4007 if(PCFL(pcflow)->firstBank != PCFL(pcflow)->lastBank &&
4008 PCFL(pcflow)->firstBank >= 0 &&
4009 PCFL(pcflow)->lastBank >= 0 ) {
4011 int cur_bank = (PCFL(pcflow)->firstBank < PCFL(pcflow)->lastBank) ?
4012 PCFL(pcflow)->firstBank : PCFL(pcflow)->lastBank;
4014 FixRegisterBankingInFlow(PCFL(pcflow),cur_bank);
4015 BanksUsedFlow2(pcflow);
4020 //fprintf(stderr, "FixBankFlow - Phase 2\n");
4022 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4024 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4029 if(!isPCFL(pcflow)) {
4030 fprintf(stderr, "FixBankFlow - pcflow is not a flow object ");
4034 PCFL(pcflow)->FromConflicts = 0;
4035 PCFL(pcflow)->ToConflicts = 0;
4040 //fprintf(stderr, " FixBankFlow flow seq %d\n",pcflow->seq);
4041 pcfl = setFirstItem(PCFL(pcflow)->from);
4044 pc = PCODE(pcfl->pcflow);
4047 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
4048 pc->print(stderr,pc);
4051 nConflicts += compareBankFlow(PCFL(pcflow), pcfl, 0);
4054 pcfl=setNextItem(PCFL(pcflow)->from);
4057 if((nFlows >= 2) && nConflicts && (PCFL(pcflow)->firstBank>0)) {
4058 //fprintf(stderr, " From conflicts flow seq %d, nflows %d ,nconflicts %d\n",pcflow->seq,nFlows, nConflicts);
4060 FixRegisterBankingInFlow(PCFL(pcflow),0);
4061 BanksUsedFlow2(pcflow);
4063 continue; /* Don't need to check the flow from here - it's already been fixed */
4070 pcfl = setFirstItem(PCFL(pcflow)->to);
4073 pc = PCODE(pcfl->pcflow);
4075 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
4076 pc->print(stderr,pc);
4079 nConflicts += compareBankFlow(PCFL(pcflow), pcfl, 1);
4082 pcfl=setNextItem(PCFL(pcflow)->to);
4085 if((nFlows >= 2) && nConflicts &&(nConflicts != nFlows) && (PCFL(pcflow)->lastBank>0)) {
4086 //fprintf(stderr, " To conflicts flow seq %d, nflows %d ,nconflicts %d\n",pcflow->seq,nFlows, nConflicts);
4088 FixRegisterBankingInFlow(PCFL(pcflow),0);
4089 BanksUsedFlow2(pcflow);
4094 Loop through the flow objects again and find the ones with the
4098 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4100 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4102 if(PCFL(pcflow)->ToConflicts > max_ToConflicts)
4103 pcflow_max_To = pcflow;
4105 if(PCFL(pcflow)->FromConflicts > max_FromConflicts)
4106 pcflow_max_From = pcflow;
4110 fprintf(stderr,"compare flow Max To conflicts: seq %d conflicts %d\n",
4111 PCFL(pcflow_max_To)->pc.seq,
4112 PCFL(pcflow_max_To)->ToConflicts);
4115 fprintf(stderr,"compare flow Max From conflicts: seq %d conflicts %d\n",
4116 PCFL(pcflow_max_From)->pc.seq,
4117 PCFL(pcflow_max_From)->FromConflicts);
4121 /*-----------------------------------------------------------------*/
4122 /*-----------------------------------------------------------------*/
4123 void DumpFlow(pBlock *pb)
4127 pCodeFlowLink *pcfl;
4130 fprintf(stderr,"Dump flow \n");
4131 pb->pcHead->print(stderr, pb->pcHead);
4133 pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4134 pcflow->print(stderr,pcflow);
4136 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4138 pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
4140 if(!isPCFL(pcflow)) {
4141 fprintf(stderr, "DumpFlow - pcflow is not a flow object ");
4144 fprintf(stderr,"dumping: ");
4145 pcflow->print(stderr,pcflow);
4146 FlowStats(PCFL(pcflow));
4148 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
4150 pc = PCODE(pcfl->pcflow);
4152 fprintf(stderr, " from seq %d:\n",pc->seq);
4154 fprintf(stderr,"oops dumpflow - from is not a pcflow\n");
4155 pc->print(stderr,pc);
4160 for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
4162 pc = PCODE(pcfl->pcflow);
4164 fprintf(stderr, " to seq %d:\n",pc->seq);
4166 fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
4167 pc->print(stderr,pc);
4176 /*-----------------------------------------------------------------*/
4177 /*-----------------------------------------------------------------*/
4178 int OptimizepBlock(pBlock *pb)
4183 if(!pb || !peepOptimizing)
4186 DFPRINTF((stderr," Optimizing pBlock: %c\n",getpBlock_dbName(pb)));
4188 for(pc = pb->pcHead; pc; pc = pc->next)
4189 matches += pCodePeepMatchRule(pc);
4192 pc = findNextInstruction(pb->pcHead);
4200 if(pCodePeepMatchRule(pc)) {
4205 pc = findNextInstruction(pcprev->next);
4207 pc = findNextInstruction(pb->pcHead);
4209 pc = findNextInstruction(pc->next);
4213 DFPRINTF((stderr," Optimizing pBlock: %c - matches=%d\n",getpBlock_dbName(pb),matches));
4218 /*-----------------------------------------------------------------*/
4219 /* pBlockRemoveUnusedLabels - remove the pCode labels from the */
4220 /*-----------------------------------------------------------------*/
4221 pCode * findInstructionUsingLabel(pCodeLabel *pcl, pCode *pcs)
4225 for(pc = pcs; pc; pc = pc->next) {
4227 if((pc->type == PC_OPCODE) &&
4229 (PCI(pc)->pcop->type == PO_LABEL) &&
4230 (PCOLAB(PCI(pc)->pcop)->key == pcl->key))
4238 /*-----------------------------------------------------------------*/
4239 /*-----------------------------------------------------------------*/
4240 void exchangeLabels(pCodeLabel *pcl, pCode *pc)
4245 (PCI(pc)->pcop->type == PO_LABEL)) {
4247 pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
4249 //fprintf(stderr,"changing label key from %d to %d\n",pcol->key, pcl->key);
4251 free(pcol->pcop.name);
4253 sprintf(buffer,"_%05d_DS_",pcl->key);
4255 pcol->pcop.name = Safe_strdup(buffer);
4256 pcol->key = pcl->key;
4257 //pc->print(stderr,pc);
4264 /*-----------------------------------------------------------------*/
4265 /* pBlockRemoveUnusedLabels - remove the pCode labels from the */
4266 /* pCode chain if they're not used. */
4267 /*-----------------------------------------------------------------*/
4268 void pBlockRemoveUnusedLabels(pBlock *pb)
4270 pCode *pc; pCodeLabel *pcl;
4275 for(pc = pb->pcHead; (pc=findNextInstruction(pc->next)) != NULL; ) {
4277 pBranch *pbr = PCI(pc)->label;
4278 if(pbr && pbr->next) {
4279 pCode *pcd = pb->pcHead;
4281 //fprintf(stderr, "multiple labels\n");
4282 //pc->print(stderr,pc);
4287 while ( (pcd = findInstructionUsingLabel(PCL(PCI(pc)->label->pc), pcd)) != NULL) {
4288 //fprintf(stderr,"Used by:\n");
4289 //pcd->print(stderr,pcd);
4291 exchangeLabels(PCL(pbr->pc),pcd);
4300 for(pc = pb->pcHead; pc; pc = pc->next) {
4302 if(isPCL(pc)) // pc->type == PC_LABEL)
4304 else if (isPCI(pc) && PCI(pc)->label) //((pc->type == PC_OPCODE) && PCI(pc)->label)
4305 pcl = PCL(PCI(pc)->label->pc);
4308 //fprintf(stderr," found A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
4310 /* This pCode is a label, so search the pBlock to see if anyone
4313 if( (pcl->key>0) && (!findInstructionUsingLabel(pcl, pb->pcHead))) {
4314 //if( !findInstructionUsingLabel(pcl, pb->pcHead)) {
4315 /* Couldn't find an instruction that refers to this label
4316 * So, unlink the pCode label from it's pCode chain
4317 * and destroy the label */
4318 //fprintf(stderr," removed A LABEL !!! key = %d, %s\n", pcl->key,pcl->label);
4320 DFPRINTF((stderr," !!! REMOVED A LABEL !!! key = %d, %s\n", pcl->key,pcl->label));
4321 if(pc->type == PC_LABEL) {
4323 pCodeLabelDestruct(pc);
4325 unlinkpCodeFromBranch(pc, PCODE(pcl));
4326 /*if(pc->label->next == NULL && pc->label->pc == NULL) {
4337 /*-----------------------------------------------------------------*/
4338 /* pBlockMergeLabels - remove the pCode labels from the pCode */
4339 /* chain and put them into pBranches that are */
4340 /* associated with the appropriate pCode */
4342 /*-----------------------------------------------------------------*/
4343 void pBlockMergeLabels(pBlock *pb)
4346 pCode *pc, *pcnext=NULL;
4351 /* First, Try to remove any unused labels */
4352 //pBlockRemoveUnusedLabels(pb);
4354 /* Now loop through the pBlock and merge the labels with the opcodes */
4357 // for(pc = pb->pcHead; pc; pc = pc->next) {
4360 pCode *pcn = pc->next;
4362 if(pc->type == PC_LABEL) {
4364 //fprintf(stderr," checking merging label %s\n",PCL(pc)->label);
4365 //fprintf(stderr,"Checking label key = %d\n",PCL(pc)->key);
4366 if((pcnext = findNextInstruction(pc) )) {
4368 // Unlink the pCode label from it's pCode chain
4371 //fprintf(stderr,"Merged label key = %d\n",PCL(pc)->key);
4372 // And link it into the instruction's pBranch labels. (Note, since
4373 // it's possible to have multiple labels associated with one instruction
4374 // we must provide a means to accomodate the additional labels. Thus
4375 // the labels are placed into the singly-linked list "label" as
4376 // opposed to being a single member of the pCodeInstruction.)
4378 //_ALLOC(pbr,sizeof(pBranch));
4379 pbr = Safe_calloc(1,sizeof(pBranch));
4383 PCI(pcnext)->label = pBranchAppend(PCI(pcnext)->label,pbr);
4386 fprintf(stderr, "WARNING: couldn't associate label %s with an instruction\n",PCL(pc)->label);
4388 } else if(pc->type == PC_CSOURCE) {
4390 /* merge the source line symbolic info into the next instruction */
4391 if((pcnext = findNextInstruction(pc) )) {
4393 // Unlink the pCode label from it's pCode chain
4395 PCI(pcnext)->cline = PCCS(pc);
4396 //fprintf(stderr, "merging CSRC\n");
4397 //genericPrint(stderr,pcnext);
4403 pBlockRemoveUnusedLabels(pb);
4407 /*-----------------------------------------------------------------*/
4408 /*-----------------------------------------------------------------*/
4409 int OptimizepCode(char dbName)
4411 #define MAX_PASSES 4
4420 DFPRINTF((stderr," Optimizing pCode\n"));
4424 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
4425 if('*' == dbName || getpBlock_dbName(pb) == dbName)
4426 matches += OptimizepBlock(pb);
4429 while(matches && ++passes < MAX_PASSES);
4434 /*-----------------------------------------------------------------*/
4435 /* popCopyGPR2Bit - copy a pcode operator */
4436 /*-----------------------------------------------------------------*/
4438 pCodeOp *popCopyGPR2Bit(pCodeOp *pc, int bitval)
4442 pcop = newpCodeOpBit(pc->name, bitval, 0);
4444 if( !( (pcop->type == PO_LABEL) ||
4445 (pcop->type == PO_LITERAL) ||
4446 (pcop->type == PO_STR) ))
4447 PCOR(pcop)->r = PCOR(pc)->r; /* This is dangerous... */
4455 /*-----------------------------------------------------------------*/
4456 /*-----------------------------------------------------------------*/
4457 int InstructionRegBank(pCode *pc)
4461 if( (reg = getRegFromInstruction(pc)) == NULL)
4464 return REG_BANK(reg);
4469 /*-----------------------------------------------------------------*/
4470 /*-----------------------------------------------------------------*/
4471 void FixRegisterBanking(pBlock *pb)
4483 //pc = findNextpCode(pb->pcHead, PC_FLOW);
4484 pc = findNextpCode(pb->pcHead, PC_OPCODE);
4487 /* loop through all of the flow blocks with in one pblock */
4489 //fprintf(stderr,"Register banking\n");
4492 /* at this point, pc should point to a PC_FLOW object */
4495 /* for each flow block, determine the register banking
4500 //genericPrint(stderr, pc);
4502 reg = getRegFromInstruction(pc);
4505 fprintf(stderr, " %s ",reg->name);
4506 fprintf(stderr, "addr = 0x%03x, bank = %d\n",reg->address,REG_BANK(reg));
4510 if(reg && REG_BANK(reg)!=cur_bank) {
4511 /* Examine the instruction before this one to make sure it is
4512 * not a skip type instruction */
4513 pcprev = findPrevpCode(pc->prev, PC_OPCODE);
4514 if(!pcprev || (pcprev && !isPCI_SKIP(pcprev))) {
4515 int b = cur_bank ^ REG_BANK(reg);
4517 //fprintf(stderr, "Cool! can switch banks\n");
4518 cur_bank = REG_BANK(reg);
4520 new_pc = newpCode(((cur_bank&1) ? POC_BSF : POC_BCF),
4521 popCopyGPR2Bit(PCOP(&pc_status),PIC_RP0_BIT));
4522 pCodeInsertAfter(pc->prev, new_pc);
4523 if(PCI(pc)->label) {
4524 PCI(new_pc)->label = PCI(pc)->label;
4525 PCI(pc)->label = NULL;
4528 new_pc = newpCode(((cur_bank&1) ? POC_BCF : POC_BSF),
4529 popCopyGPR2Bit(PCOP(&pc_status),PIC_RP0_BIT));
4530 pCodeInsertAfter(pc, new_pc);
4536 //fprintf(stderr, "Bummer can't switch banks\n");
4544 // } while(pc && !(isPCFL(pc)));
4549 if(pcprev && cur_bank) {
4550 /* Brute force - make sure that we point to bank 0 at the
4551 * end of each flow block */
4552 new_pc = newpCode(POC_BCF,
4553 popCopyGPR2Bit(PCOP(&pc_status),PIC_RP0_BIT));
4554 pCodeInsertAfter(pcprev, new_pc);
4560 void pBlockDestruct(pBlock *pb)
4571 /*-----------------------------------------------------------------*/
4572 /* void mergepBlocks(char dbName) - Search for all pBlocks with the*/
4573 /* name dbName and combine them */
4574 /* into one block */
4575 /*-----------------------------------------------------------------*/
4576 void mergepBlocks(char dbName)
4579 pBlock *pb, *pbmerged = NULL,*pbn;
4581 pb = the_pFile->pbHead;
4583 //fprintf(stderr," merging blocks named %c\n",dbName);
4587 //fprintf(stderr,"looking at %c\n",getpBlock_dbName(pb));
4588 if( getpBlock_dbName(pb) == dbName) {
4590 //fprintf(stderr," merged block %c\n",dbName);
4595 addpCode2pBlock(pbmerged, pb->pcHead);
4596 /* addpCode2pBlock doesn't handle the tail: */
4597 pbmerged->pcTail = pb->pcTail;
4599 pb->prev->next = pbn;
4601 pbn->prev = pb->prev;
4606 //printpBlock(stderr, pbmerged);
4613 /*-----------------------------------------------------------------*/
4614 /* AnalyzeFlow - Examine the flow of the code and optimize */
4616 /* level 0 == minimal optimization */
4617 /* optimize registers that are used only by two instructions */
4618 /* level 1 == maximal optimization */
4619 /* optimize by looking at pairs of instructions that use the */
4621 /*-----------------------------------------------------------------*/
4623 void AnalyzeFlow(int level)
4625 static int times_called=0;
4633 /* if this is not the first time this function has been called,
4634 then clean up old flow information */
4635 if(times_called++) {
4636 for(pb = the_pFile->pbHead; pb; pb = pb->next)
4639 RegsUnMapLiveRanges();
4645 /* Phase 2 - Flow Analysis - Register Banking
4647 * In this phase, the individual flow blocks are examined
4648 * and register banking is fixed.
4651 //for(pb = the_pFile->pbHead; pb; pb = pb->next)
4652 //FixRegisterBanking(pb);
4654 /* Phase 2 - Flow Analysis
4656 * In this phase, the pCode is partition into pCodeFlow
4657 * blocks. The flow blocks mark the points where a continuous
4658 * stream of instructions changes flow (e.g. because of
4659 * a call or goto or whatever).
4662 for(pb = the_pFile->pbHead; pb; pb = pb->next)
4666 /* Phase 2 - Flow Analysis - linking flow blocks
4668 * In this phase, the individual flow blocks are examined
4669 * to determine their order of excution.
4672 for(pb = the_pFile->pbHead; pb; pb = pb->next)
4675 /* Phase 3 - Flow Analysis - Flow Tree
4677 * In this phase, the individual flow blocks are examined
4678 * to determine their order of excution.
4681 for(pb = the_pFile->pbHead; pb; pb = pb->next)
4686 /* Phase x - Flow Analysis - Used Banks
4688 * In this phase, the individual flow blocks are examined
4689 * to determine the Register Banks they use
4692 for(pb = the_pFile->pbHead; pb; pb = pb->next)
4696 for(pb = the_pFile->pbHead; pb; pb = pb->next)
4697 pCodeRegMapLiveRanges(pb);
4699 RemoveUnusedRegisters();
4701 // for(pb = the_pFile->pbHead; pb; pb = pb->next)
4702 pCodeRegOptimizeRegUsage(level);
4708 for(pb = the_pFile->pbHead; pb; pb = pb->next)
4712 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
4714 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4715 (pcflow = findNextpCode(pcflow, PC_FLOW)) != NULL;
4716 pcflow = pcflow->next) {
4718 FillFlow(PCFL(pcflow));
4723 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
4725 for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
4726 (pcflow = findNextpCode(pcflow, PC_FLOW)) != NULL;
4727 pcflow = pcflow->next) {
4729 FlowStats(PCFL(pcflow));
4735 /*-----------------------------------------------------------------*/
4736 /* AnalyzeBanking - Called after the memory addresses have been */
4737 /* assigned to the registers. */
4739 /*-----------------------------------------------------------------*/
4741 void AnalyzeBanking(void)
4745 if(!picIsInitialized()) {
4746 fprintf(stderr,"Temporary ERROR: at the moment you have to use\n");
4747 fprintf(stderr,"an include file create by inc2h.pl. See SDCC source:\n");
4748 fprintf(stderr,"support/scripts/inc2h.pl\n");
4749 fprintf(stderr,"this is a nuisance bug that will be fixed shortly\n");
4754 /* Phase x - Flow Analysis - Used Banks
4756 * In this phase, the individual flow blocks are examined
4757 * to determine the Register Banks they use
4763 for(pb = the_pFile->pbHead; pb; pb = pb->next)
4765 for(pb = the_pFile->pbHead; pb; pb = pb->next)
4766 FixRegisterBanking(pb);
4770 /*-----------------------------------------------------------------*/
4771 /* buildCallTree - look at the flow and extract all of the calls */
4773 /*-----------------------------------------------------------------*/
4774 set *register_usage(pBlock *pb);
4776 void buildCallTree(void )
4787 /* Now build the call tree.
4788 First we examine all of the pCodes for functions.
4789 Keep in mind that the function boundaries coincide
4790 with pBlock boundaries.
4792 The algorithm goes something like this:
4793 We have two nested loops. The outer loop iterates
4794 through all of the pBlocks/functions. The inner
4795 loop iterates through all of the pCodes for
4796 a given pBlock. When we begin iterating through
4797 a pBlock, the variable pc_fstart, pCode of the start
4798 of a function, is cleared. We then search for pCodes
4799 of type PC_FUNCTION. When one is encountered, we
4800 initialize pc_fstart to this and at the same time
4801 associate a new pBranch object that signifies a
4802 branch entry. If a return is found, then this signifies
4803 a function exit point. We'll link the pCodes of these
4804 returns to the matching pc_fstart.
4806 When we're done, a doubly linked list of pBranches
4807 will exist. The head of this list is stored in
4808 `the_pFile', which is the meta structure for all
4809 of the pCode. Look at the printCallTree function
4810 on how the pBranches are linked together.
4813 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
4814 pCode *pc_fstart=NULL;
4815 for(pc = pb->pcHead; pc; pc = pc->next) {
4817 if (PCF(pc)->fname) {
4819 if(STRCASECMP(PCF(pc)->fname, "_main") == 0) {
4820 //fprintf(stderr," found main \n");
4821 pb->cmemmap = NULL; /* FIXME do we need to free ? */
4825 pbr = Safe_calloc(1,sizeof(pBranch));
4826 pbr->pc = pc_fstart = pc;
4829 the_pFile->functions = pBranchAppend(the_pFile->functions,pbr);
4831 // Here's a better way of doing the same:
4832 addSet(&pb->function_entries, pc);
4835 // Found an exit point in a function, e.g. return
4836 // (Note, there may be more than one return per function)
4838 pBranchLink(PCF(pc_fstart), PCF(pc));
4840 addSet(&pb->function_exits, pc);
4842 } else if(isCALL(pc)) {
4843 addSet(&pb->function_calls,pc);
4848 /* Re-allocate the registers so that there are no collisions
4849 * between local variables when one function call another */
4852 // pic14_deallocateAllRegs();
4854 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
4861 /*-----------------------------------------------------------------*/
4862 /* AnalyzepCode - parse the pCode that has been generated and form */
4863 /* all of the logical connections. */
4865 /* Essentially what's done here is that the pCode flow is */
4867 /*-----------------------------------------------------------------*/
4869 void AnalyzepCode(char dbName)
4880 /* Phase 1 - Register allocation and peep hole optimization
4882 * The first part of the analysis is to determine the registers
4883 * that are used in the pCode. Once that is done, the peep rules
4884 * are applied to the code. We continue to loop until no more
4885 * peep rule optimizations are found (or until we exceed the
4886 * MAX_PASSES threshold).
4888 * When done, the required registers will be determined.
4894 DFPRINTF((stderr," Analyzing pCode: PASS #%d\n",i+1));
4895 //fprintf(stderr," Analyzing pCode: PASS #%d\n",i+1);
4897 /* First, merge the labels with the instructions */
4898 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
4899 if('*' == dbName || getpBlock_dbName(pb) == dbName) {
4901 DFPRINTF((stderr," analyze and merging block %c\n",dbName));
4902 //fprintf(stderr," analyze and merging block %c\n",dbName);
4903 pBlockMergeLabels(pb);
4906 DFPRINTF((stderr," skipping block analysis dbName=%c blockname=%c\n",dbName,getpBlock_dbName));
4910 changes = OptimizepCode(dbName);
4912 } while(changes && (i++ < MAX_PASSES));
4917 /*-----------------------------------------------------------------*/
4918 /* ispCodeFunction - returns true if *pc is the pCode of a */
4920 /*-----------------------------------------------------------------*/
4921 bool ispCodeFunction(pCode *pc)
4924 if(pc && pc->type == PC_FUNCTION && PCF(pc)->fname)
4930 /*-----------------------------------------------------------------*/
4931 /* findFunction - Search for a function by name (given the name) */
4932 /* in the set of all functions that are in a pBlock */
4933 /* (note - I expect this to change because I'm planning to limit */
4934 /* pBlock's to just one function declaration */
4935 /*-----------------------------------------------------------------*/
4936 pCode *findFunction(char *fname)
4943 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
4945 pc = setFirstItem(pb->function_entries);
4948 if((pc->type == PC_FUNCTION) &&
4950 (strcmp(fname, PCF(pc)->fname)==0))
4953 pc = setNextItem(pb->function_entries);
4961 void MarkUsedRegisters(set *regset)
4966 for(r1=setFirstItem(regset); r1; r1=setNextItem(regset)) {
4967 r2 = pic14_regWithIdx(r1->rIdx);
4973 void pBlockStats(FILE *of, pBlock *pb)
4979 fprintf(of,";***\n; pBlock Stats: dbName = %c\n;***\n",getpBlock_dbName(pb));
4981 // for now just print the first element of each set
4982 pc = setFirstItem(pb->function_entries);
4984 fprintf(of,";entry: ");
4987 pc = setFirstItem(pb->function_exits);
4989 fprintf(of,";has an exit\n");
4993 pc = setFirstItem(pb->function_calls);
4995 fprintf(of,";functions called:\n");
4998 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
4999 fprintf(of,"; %s\n",get_op_from_instruction(PCI(pc)));
5001 pc = setNextItem(pb->function_calls);
5005 r = setFirstItem(pb->tregisters);
5007 int n = elementsInSet(pb->tregisters);
5009 fprintf(of,";%d compiler assigned register%c:\n",n, ( (n!=1) ? 's' : ' '));
5012 fprintf(of,"; %s\n",r->name);
5013 r = setNextItem(pb->tregisters);
5018 /*-----------------------------------------------------------------*/
5019 /*-----------------------------------------------------------------*/
5021 static void sequencepCode(void)
5027 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5029 pb->seq = GpCodeSequenceNumber+1;
5031 for( pc = pb->pcHead; pc; pc = pc->next)
5032 pc->seq = ++GpCodeSequenceNumber;
5038 /*-----------------------------------------------------------------*/
5039 /*-----------------------------------------------------------------*/
5040 set *register_usage(pBlock *pb)
5043 set *registers=NULL;
5044 set *registersInCallPath = NULL;
5046 /* check recursion */
5048 pc = setFirstItem(pb->function_entries);
5055 if(pc->type != PC_FUNCTION)
5056 fprintf(stderr,"%s, first pc is not a function???\n",__FUNCTION__);
5058 pc = setFirstItem(pb->function_calls);
5059 for( ; pc; pc = setNextItem(pb->function_calls)) {
5061 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
5062 char *dest = get_op_from_instruction(PCI(pc));
5064 pcn = findFunction(dest);
5066 registersInCallPath = register_usage(pcn->pb);
5068 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
5073 pBlockStats(stderr,pb); // debug
5076 // Mark the registers in this block as used.
5078 MarkUsedRegisters(pb->tregisters);
5079 if(registersInCallPath) {
5080 /* registers were used in the functions this pBlock has called */
5081 /* so now, we need to see if these collide with the ones we are */
5084 regs *r1,*r2, *newreg;
5086 DFPRINTF((stderr,"comparing registers\n"));
5088 r1 = setFirstItem(registersInCallPath);
5091 r2 = setFirstItem(pb->tregisters);
5093 while(r2 && (r1->type != REG_STK)) {
5095 if(r2->rIdx == r1->rIdx) {
5096 newreg = pic14_findFreeReg(REG_GPR);
5100 DFPRINTF((stderr,"Bummer, no more registers.\n"));
5104 DFPRINTF((stderr,"Cool found register collision nIdx=%d moving to %d\n",
5105 r1->rIdx, newreg->rIdx));
5106 r2->rIdx = newreg->rIdx;
5107 //if(r2->name) free(r2->name);
5109 r2->name = Safe_strdup(newreg->name);
5113 newreg->wasUsed = 1;
5115 r2 = setNextItem(pb->tregisters);
5118 r1 = setNextItem(registersInCallPath);
5121 /* Collisions have been resolved. Now free the registers in the call path */
5122 r1 = setFirstItem(registersInCallPath);
5124 if(r1->type != REG_STK) {
5125 newreg = pic14_regWithIdx(r1->rIdx);
5128 r1 = setNextItem(registersInCallPath);
5132 // MarkUsedRegisters(pb->registers);
5134 registers = unionSets(pb->tregisters, registersInCallPath, THROW_NONE);
5137 DFPRINTF((stderr,"returning regs\n"));
5139 DFPRINTF((stderr,"not returning regs\n"));
5141 DFPRINTF((stderr,"pBlock after register optim.\n"));
5142 pBlockStats(stderr,pb); // debug
5148 /*-----------------------------------------------------------------*/
5149 /* printCallTree - writes the call tree to a file */
5151 /*-----------------------------------------------------------------*/
5152 void pct2(FILE *of,pBlock *pb,int indent)
5156 // set *registersInCallPath = NULL;
5162 return; //recursion ?
5164 pc = setFirstItem(pb->function_entries);
5171 for(i=0;i<indent;i++) // Indentation
5174 if(pc->type == PC_FUNCTION)
5175 fprintf(of,"%s\n",PCF(pc)->fname);
5180 pc = setFirstItem(pb->function_calls);
5181 for( ; pc; pc = setNextItem(pb->function_calls)) {
5183 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL) {
5184 char *dest = get_op_from_instruction(PCI(pc));
5186 pcn = findFunction(dest);
5188 pct2(of,pcn->pb,indent+1);
5190 fprintf(of,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
5198 /*-----------------------------------------------------------------*/
5199 /* printCallTree - writes the call tree to a file */
5201 /*-----------------------------------------------------------------*/
5203 void printCallTree(FILE *of)
5215 fprintf(of, "\npBlock statistics\n");
5216 for(pb = the_pFile->pbHead; pb; pb = pb->next )
5221 fprintf(of,"Call Tree\n");
5222 pbr = the_pFile->functions;
5226 if(!ispCodeFunction(pc))
5227 fprintf(of,"bug in call tree");
5230 fprintf(of,"Function: %s\n", PCF(pc)->fname);
5232 while(pc->next && !ispCodeFunction(pc->next)) {
5234 if(pc->type == PC_OPCODE && PCI(pc)->op == POC_CALL)
5235 fprintf(of,"\t%s\n",get_op_from_instruction(PCI(pc)));
5243 fprintf(of,"\n**************\n\na better call tree\n");
5244 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5249 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5250 fprintf(of,"block dbname: %c\n", getpBlock_dbName(pb));
5256 /*-----------------------------------------------------------------*/
5258 /*-----------------------------------------------------------------*/
5260 void InlineFunction(pBlock *pb)
5268 pc = setFirstItem(pb->function_calls);
5270 for( ; pc; pc = setNextItem(pb->function_calls)) {
5273 pCode *pcn = findFunction(get_op_from_instruction(PCI(pc)));
5279 if(pcn && isPCF(pcn) && (PCF(pcn)->ncalled == 1)) {
5281 //fprintf(stderr,"Cool can inline:\n");
5282 //pcn->print(stderr,pcn);
5284 //fprintf(stderr,"recursive call Inline\n");
5285 InlineFunction(pcn->pb);
5286 //fprintf(stderr,"return from recursive call Inline\n");
5289 At this point, *pc points to a CALL mnemonic, and
5290 *pcn points to the function that is being called.
5292 To in-line this call, we need to remove the CALL
5293 and RETURN(s), and link the function pCode in with
5299 /* Remove the CALL */
5303 /* remove callee pBlock from the pBlock linked list */
5304 removepBlock(pcn->pb);
5312 /* Remove the Function pCode */
5313 pct = findNextInstruction(pcn->next);
5315 /* Link the function with the callee */
5316 pc->next = pcn->next;
5317 pcn->next->prev = pc;
5319 /* Convert the function name into a label */
5321 pbr = Safe_calloc(1,sizeof(pBranch));
5322 pbr->pc = newpCodeLabel(PCF(pcn)->fname, -1);
5324 PCI(pct)->label = pBranchAppend(PCI(pct)->label,pbr);
5325 PCI(pct)->label = pBranchAppend(PCI(pct)->label,PCI(pc_call)->label);
5327 /* turn all of the return's except the last into goto's */
5328 /* check case for 2 instruction pBlocks */
5329 pce = findNextInstruction(pcn->next);
5331 pCode *pce_next = findNextInstruction(pce->next);
5333 if(pce_next == NULL) {
5334 /* found the last return */
5335 pCode *pc_call_next = findNextInstruction(pc_call->next);
5337 //fprintf(stderr,"found last return\n");
5338 //pce->print(stderr,pce);
5339 pce->prev->next = pc_call->next;
5340 pc_call->next->prev = pce->prev;
5341 PCI(pc_call_next)->label = pBranchAppend(PCI(pc_call_next)->label,
5351 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
5357 /*-----------------------------------------------------------------*/
5359 /*-----------------------------------------------------------------*/
5361 void InlinepCode(void)
5370 if(!functionInlining)
5373 /* Loop through all of the function definitions and count the
5374 * number of times each one is called */
5375 //fprintf(stderr,"inlining %d\n",__LINE__);
5377 for(pb = the_pFile->pbHead; pb; pb = pb->next) {
5379 pc = setFirstItem(pb->function_calls);
5381 for( ; pc; pc = setNextItem(pb->function_calls)) {
5384 pCode *pcn = findFunction(get_op_from_instruction(PCI(pc)));
5385 if(pcn && isPCF(pcn)) {
5386 PCF(pcn)->ncalled++;
5389 fprintf(stderr,"BUG? pCode isn't a POC_CALL %d\n",__LINE__);
5394 //fprintf(stderr,"inlining %d\n",__LINE__);
5396 /* Now, Loop through the function definitions again, but this
5397 * time inline those functions that have only been called once. */
5399 InlineFunction(the_pFile->pbHead);
5400 //fprintf(stderr,"inlining %d\n",__LINE__);
5402 for(pb = the_pFile->pbHead; pb; pb = pb->next)