// Eventually this will go into device dependent files:
-pCodeOpReg pc_status = {{PO_STATUS, "STATUS"}, -1, NULL,0,NULL};
+pCodeOpReg pc_status = {{PO_STATUS, "_STATUS"}, -1, NULL,0,NULL};
pCodeOpReg pc_indf = {{PO_INDF, "INDF"}, -1, NULL,0,NULL};
pCodeOpReg pc_fsr = {{PO_FSR, "FSR"}, -1, NULL,0,NULL};
pCodeOpReg pc_intcon = {{PO_INTCON, ""}, -1, NULL,0,NULL};
pCodeOpReg pc_pcl = {{PO_PCL, "PCL"}, -1, NULL,0,NULL};
-pCodeOpReg pc_pclath = {{PO_PCLATH, "PCLATH"}, -1, NULL,0,NULL};
+pCodeOpReg pc_pclath = {{PO_PCLATH, "_PCLATH"}, -1, NULL,0,NULL};
pCodeOpReg pc_kzero = {{PO_GPR_REGISTER, "KZ"}, -1, NULL,0,NULL};
pCodeOpReg pc_wsave = {{PO_GPR_REGISTER, "WSAVE"}, -1, NULL,0,NULL};
static pFile *the_pFile = NULL;
-static int peepOptimizing = 1;
-static int GpCodeSequenceNumber = 1;
-static int GpcFlowSeq = 1;
+static pBlock *pb_dead_pcodes = NULL;
+
+/* Hardcoded flags to change the behavior of the PIC port */
+static int peepOptimizing = 1; /* run the peephole optimizer if nonzero */
+static int functionInlining = 1; /* inline functions if nonzero */
+int debug_verbose = 0; /* Set true to inundate .asm file */
-#define isPCI(x) ((PCODE(x)->type == PC_OPCODE))
-#define isPCI_BRANCH(x) ((PCODE(x)->type == PC_OPCODE) && PCI(x)->isBranch)
-#define isPCI_SKIP(x) ((PCODE(x)->type == PC_OPCODE) && PCI(x)->isSkip)
-#define isPCI_BITSKIP(x)((PCODE(x)->type == PC_OPCODE) && PCI(x)->isSkip && PCI(x)->isBitInst)
-#define isPCFL(x) ((PCODE(x)->type == PC_FLOW))
-#define isPCF(x) ((PCODE(x)->type == PC_FUNCTION))
-#define isPCL(x) ((PCODE(x)->type == PC_LABEL))
-#define isPCW(x) ((PCODE(x)->type == PC_WILD))
-#define isPCCS(x) ((PCODE(x)->type == PC_CSOURCE))
+static int GpCodeSequenceNumber = 1;
+int GpcFlowSeq = 1;
-#define isCALL(x) ((isPCI(x)) && (PCI(x)->op == POC_CALL))
-#define isSTATUS_REG(r) ((r)->pc_type == PO_STATUS)
+extern void RemoveUnusedRegisters(void);
+extern void RegsUnMapLiveRanges(void);
+extern void BuildFlowTree(pBlock *pb);
+extern void pCodeRegOptimizeRegUsage(int level);
+extern int picIsInitialized(void);
/****************************************************************/
/* Forward declarations */
/****************************************************************/
-static void unlinkPC(pCode *pc);
+void unlinkpCode(pCode *pc);
#if 0
static void genericAnalyze(pCode *pc);
static void AnalyzeGOTO(pCode *pc);
static void pCodePrintFunction(FILE *of, pCode *pc);
static void pCodeOpPrint(FILE *of, pCodeOp *pcop);
static char *get_op_from_instruction( pCodeInstruction *pcc);
-char *get_op( pCodeOp *pcop);
+char *get_op( pCodeOp *pcop,char *buff,int buf_size);
int pCodePeepMatchLine(pCodePeep *peepBlock, pCode *pcs, pCode *pcd);
int pCodePeepMatchRule(pCode *pc);
void pBlockStats(FILE *of, pBlock *pb);
+pBlock *newpBlock(void);
extern void pCodeInsertAfter(pCode *pc1, pCode *pc2);
+extern pCodeOp *popCopyReg(pCodeOpReg *pc);
+pCodeOp *popCopyGPR2Bit(pCodeOp *pc, int bitval);
+void pCodeRegMapLiveRanges(pBlock *pb);
+
+
+/****************************************************************/
+/* PIC Instructions */
+/****************************************************************/
pCodeInstruction pciADDWF = {
{PC_OPCODE, NULL, NULL, 0, NULL,
0,0, // dest, bit instruction
0,0, // branch, skip
POC_NOP,
- PCC_W, // inCond
+ (PCC_W | PCC_LITERAL), // inCond
(PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
};
0,0, // dest, bit instruction
0,0, // branch, skip
POC_NOP,
- PCC_W, // inCond
+ (PCC_W | PCC_LITERAL), // inCond
(PCC_W | PCC_Z) // outCond
};
1,1, // dest, bit instruction
0,0, // branch, skip
POC_BSF,
- PCC_REGISTER, // inCond
+ (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
PCC_REGISTER // outCond
};
1,1, // dest, bit instruction
0,0, // branch, skip
POC_BCF,
- PCC_REGISTER, // inCond
- PCC_REGISTER // outCond
+ (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
+ (PCC_REGISTER | PCC_EXAMINE_PCOP) // outCond
};
pCodeInstruction pciBTFSC = {
0,1, // dest, bit instruction
1,1, // branch, skip
POC_BTFSS,
- PCC_REGISTER, // inCond
- PCC_NONE // outCond
+ (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
+ PCC_EXAMINE_PCOP // outCond
};
pCodeInstruction pciBTFSS = {
0,1, // dest, bit instruction
1,1, // branch, skip
POC_BTFSC,
- PCC_REGISTER, // inCond
- PCC_NONE // outCond
+ (PCC_REGISTER | PCC_EXAMINE_PCOP), // inCond
+ PCC_EXAMINE_PCOP // outCond
};
pCodeInstruction pciCALL = {
0,0, // dest, bit instruction
0,0, // branch, skip
POC_NOP,
- PCC_REGISTER, // inCond
+ PCC_NONE, // inCond
PCC_REGISTER // outCond
};
0,0, // dest, bit instruction
0,0, // branch, skip
POC_NOP,
- PCC_W, // inCond
+ PCC_NONE, // inCond
PCC_W // outCond
};
+pCodeInstruction pciCLRWDT = {
+ {PC_OPCODE, NULL, NULL, 0, NULL,
+ // genericAnalyze,
+ genericDestruct,
+ genericPrint},
+ POC_CLRWDT,
+ "CLRWDT",
+ NULL, // from branch
+ NULL, // to branch
+ NULL, // label
+ NULL, // operand
+ NULL, // flow block
+ NULL, // C source
+ 0, // num ops
+ 0,0, // dest, bit instruction
+ 0,0, // branch, skip
+ POC_NOP,
+ PCC_NONE, // inCond
+ PCC_NONE // outCond
+};
+
pCodeInstruction pciDECF = {
{PC_OPCODE, NULL, NULL, 0, NULL,
// genericAnalyze,
0,0, // dest, bit instruction
0,0, // branch, skip
POC_NOP,
- PCC_W, // inCond
+ (PCC_W | PCC_LITERAL), // inCond
(PCC_W | PCC_Z) // outCond
};
0,0, // dest, bit instruction
0,0, // branch, skip
POC_NOP,
- PCC_NONE, // inCond
+ (PCC_NONE | PCC_LITERAL), // inCond
PCC_W // outCond
};
0,0, // dest, bit instruction
1,0, // branch, skip
POC_NOP,
- PCC_NONE, // inCond
+ PCC_LITERAL, // inCond
PCC_W // outCond
};
0,0, // dest, bit instruction
0,0, // branch, skip
POC_NOP,
- PCC_W, // inCond
+ (PCC_W | PCC_LITERAL), // inCond
(PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
};
0,0, // dest, bit instruction
0,0, // branch, skip
POC_NOP,
- PCC_W, // inCond
+ (PCC_W | PCC_LITERAL), // inCond
(PCC_W | PCC_Z | PCC_C | PCC_DC) // outCond
};
len = strlen(*str);
if(len > *size) {
fprintf(stderr,"WARNING, it looks like %s has overflowed\n",__FUNCTION__);
+ fprintf(stderr,"len = %d is > str size %d\n",len,*size);
}
*str += len;
len = strlen(buffer);
if(len > *size) {
fprintf(stderr,"WARNING, it looks like %s has overflowed\n",__FUNCTION__);
+ fprintf(stderr,"len = %d is > str size %d\n",len,*size);
}
strcpy(*str, buffer);
void pCodeInitRegisters(void)
{
+ static int initialized=0;
+
+ if(initialized)
+ return;
+ initialized = 1;
initStack(0xfff, 8);
init_pic(port->processor);
- pc_status.r = allocProcessorRegister(IDX_STATUS,"STATUS", PO_STATUS, 0x80);
+ pc_status.r = allocProcessorRegister(IDX_STATUS,"_STATUS", PO_STATUS, 0x80);
pc_pcl.r = allocProcessorRegister(IDX_PCL,"PCL", PO_PCL, 0x80);
- pc_pclath.r = allocProcessorRegister(IDX_PCLATH,"PCLATH", PO_PCLATH, 0x80);
+ pc_pclath.r = allocProcessorRegister(IDX_PCLATH,"_PCLATH", PO_PCLATH, 0x80);
pc_fsr.r = allocProcessorRegister(IDX_FSR,"FSR", PO_FSR, 0x80);
pc_indf.r = allocProcessorRegister(IDX_INDF,"INDF", PO_INDF, 0x80);
pc_intcon.r = allocProcessorRegister(IDX_INTCON,"INTCON", PO_INTCON, 0x80);
pc_wsave.rIdx = IDX_WSAVE;
pc_ssave.rIdx = IDX_SSAVE;
+ /* probably should put this in a separate initialization routine */
+ pb_dead_pcodes = newpBlock();
+
}
/*-----------------------------------------------------------------*/
memcpy(pci, pic14Mnemonics[op], sizeof(pCodeInstruction));
pci->pcop = pcop;
- if(pci->inCond == PCC_EXAMINE_PCOP)
- pci->inCond = RegCond(pcop);
+ if(pci->inCond & PCC_EXAMINE_PCOP)
+ pci->inCond |= RegCond(pcop);
- if(pci->outCond == PCC_EXAMINE_PCOP)
- pci->outCond = RegCond(pcop);
+ if(pci->outCond & PCC_EXAMINE_PCOP)
+ pci->outCond |= RegCond(pcop);
pci->pc.prev = pci->pc.next = NULL;
return (pCode *)pci;
/*-----------------------------------------------------------------*/
/* newpCodeFlow */
/*-----------------------------------------------------------------*/
-
void destructpCodeFlow(pCode *pc)
{
if(!pc || !isPCFL(pc))
return;
- if(PCFL(pc)->uses)
- free(PCFL(pc)->uses);
/*
if(PCFL(pc)->from)
if(PCFL(pc)->to)
*/
+ unlinkpCode(pc);
+
+ deleteSet(&PCFL(pc)->registers);
+ deleteSet(&PCFL(pc)->from);
+ deleteSet(&PCFL(pc)->to);
free(pc);
+
}
pCode *newpCodeFlow(void )
pcflow->pc.type = PC_FLOW;
pcflow->pc.prev = pcflow->pc.next = NULL;
- //pcflow->pc.from = pcflow->pc.to = pcflow->pc.label = NULL;
pcflow->pc.pb = NULL;
// pcflow->pc.analyze = genericAnalyze;
pcflow->pc.seq = GpcFlowSeq++;
- pcflow->nuses = 7;
- pcflow->uses = Safe_calloc(pcflow->nuses, sizeof(set *));
-
pcflow->from = pcflow->to = NULL;
pcflow->inCond = PCC_NONE;
pcflow->outCond = PCC_NONE;
+ pcflow->firstBank = -1;
+ pcflow->lastBank = -1;
+
+ pcflow->FromConflicts = 0;
+ pcflow->ToConflicts = 0;
+
pcflow->end = NULL;
+
+ pcflow->registers = newSet();
+
return ( (pCode *)pcflow);
}
+/*-----------------------------------------------------------------*/
+/*-----------------------------------------------------------------*/
+pCodeFlowLink *newpCodeFlowLink(pCodeFlow *pcflow)
+{
+ pCodeFlowLink *pcflowLink;
+
+ pcflowLink = Safe_calloc(1,sizeof(pCodeFlowLink));
+
+ pcflowLink->pcflow = pcflow;
+ pcflowLink->bank_conflict = 0;
+
+ return pcflowLink;
+}
+
/*-----------------------------------------------------------------*/
/* newpCodeCSource - create a new pCode Source Symbol */
/*-----------------------------------------------------------------*/
PpB->function_entries = PpB->function_exits = PpB->function_calls = NULL;
PpB->tregisters = NULL;
PpB->visited = 0;
+ PpB->FlowTree = NULL;
return PpB;
pcop = Safe_calloc(1,sizeof(pCodeOpImmd) );
pcop->type = PO_IMMEDIATE;
if(name) {
+ regs *r = dirregWithName(name);
pcop->name = Safe_strdup(name);
+ PCOI(pcop)->r = r;
+ if(r) {
+ //fprintf(stderr, " newpCodeOpImmd reg %s exists\n",name);
+ PCOI(pcop)->rIdx = r->rIdx;
+ } else {
+ //fprintf(stderr, " newpCodeOpImmd reg %s doesn't exist\n",name);
+ PCOI(pcop)->rIdx = -1;
+ }
//fprintf(stderr,"%s %s %d\n",__FUNCTION__,name,offset);
} else {
pcop->name = NULL;
}
-
PCOI(pcop)->index = index;
PCOI(pcop)->offset = offset;
PCOI(pcop)->_const = code_space;
/*-----------------------------------------------------------------*/
void addpCode2pBlock(pBlock *pb, pCode *pc)
{
+
+ if(!pc)
+ return;
+
if(!pb->pcHead) {
/* If this is the first pcode to be added to a block that
* was initialized with a NULL pcode, then go ahead and
* make this pcode the head and tail */
pb->pcHead = pb->pcTail = pc;
} else {
+ // if(pb->pcTail)
pb->pcTail->next = pc;
+
pc->prev = pb->pcTail;
- //pc->next = NULL;
pc->pb = pb;
+
pb->pcTail = pc;
}
}
/* */
/*-----------------------------------------------------------------*/
-static void unlinkPC(pCode *pc)
+void unlinkpCode(pCode *pc)
{
pc->prev = pc->next = NULL;
}
}
+
+/*-----------------------------------------------------------------*/
+/*-----------------------------------------------------------------*/
+
static void genericDestruct(pCode *pc)
{
- //fprintf(stderr,"warning, calling default pCode destructor\n");
- unlinkPC(pc);
+ unlinkpCode(pc);
- free(pc);
+ if(isPCI(pc)) {
+ /* For instructions, tell the register (if there's one used)
+ * that it's no longer needed */
+ regs *reg = getRegFromInstruction(pc);
+ if(reg)
+ deleteSetItem (&(reg->reglives.usedpCodes),pc);
+ }
+
+ /* Instead of deleting the memory used by this pCode, mark
+ * the object as bad so that if there's a pointer to this pCode
+ * dangling around somewhere then (hopefully) when the type is
+ * checked we'll catch it.
+ */
+
+ pc->type = PC_BAD;
+
+ addpCode2pBlock(pb_dead_pcodes, pc);
+
+ //free(pc);
}
/*-----------------------------------------------------------------*/
/*-----------------------------------------------------------------*/
-char *get_op(pCodeOp *pcop)
+char *get_op(pCodeOp *pcop,char *buffer, int size)
{
regs *r;
- static char buffer[50];
+ static char b[50];
char *s;
- int size;
+ int use_buffer = 1; // copy the string to the passed buffer pointer
+ if(!buffer) {
+ buffer = b;
+ size = sizeof(b);
+ use_buffer = 0; // Don't bother copying the string to the buffer.
+ }
if(pcop) {
switch(pcop->type) {
case PO_INDF:
case PO_FSR:
- //fprintf(stderr,"get_op getting register name rIdx=%d\n",PCOR(pcc->pcop)->rIdx);
- //r = pic14_regWithIdx(PCOR(pcc->pcop)->rIdx);
- //return r->name;
+ if(use_buffer) {
+ SAFE_snprintf(&buffer,&size,"%s",PCOR(pcop)->r->name);
+ return buffer;
+ }
return PCOR(pcop)->r->name;
break;
case PO_GPR_TEMP:
r = pic14_regWithIdx(PCOR(pcop)->r->rIdx);
- //fprintf(stderr,"getop: getting %s\nfrom:\n",r->name); //pcc->pcop->name);
+
+ if(use_buffer) {
+ SAFE_snprintf(&buffer,&size,"%s",r->name);
+ return buffer;
+ }
+
return r->name;
- // case PO_GPR_BIT:
- // return PCOR(pcc->pcop)->r)->name;
+
case PO_IMMEDIATE:
s = buffer;
- size = sizeof(buffer);
- //fprintf(stderr,"PO_IMMEDIATE name = %s offset = %d\n",pcc->pcop->name,PCOI(pcc->pcop)->offset);
+
if(PCOI(pcop)->_const) {
if( PCOI(pcop)->offset && PCOI(pcop)->offset<4) {
case PO_DIR:
s = buffer;
- size = sizeof(buffer);
+ //size = sizeof(buffer);
if( PCOR(pcop)->instance) {
SAFE_snprintf(&s,&size,"(%s + %d)",
pcop->name,
return buffer;
default:
- if (pcop->name)
+ if (pcop->name) {
+ if(use_buffer) {
+ SAFE_snprintf(&buffer,&size,"%s",pcop->name);
+ return buffer;
+ }
return pcop->name;
+ }
}
}
{
if(pcc )
- return get_op(pcc->pcop);
+ return get_op(pcc->pcop,NULL,0);
return ("ERROR Null: "__FUNCTION__);
SAFE_snprintf(&s,&size,";\t--FLOW change\n");
break;
case PC_CSOURCE:
- SAFE_snprintf(&s,&size,";#CSRC\t%s %d\n; %s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
+ SAFE_snprintf(&s,&size,";#CSRC\t%s %d\n; %s\n", PCCS(pc)->file_name, PCCS(pc)->line_number, PCCS(pc)->line);
break;
+ case PC_BAD:
+ SAFE_snprintf(&s,&size,";A bad pCode is being used\n");
}
return str;
fprintf(of,"%s",str);
/* Debug */
- fprintf(of, "\t;key=%03x",pc->seq);
- if(PCI(pc)->pcflow)
- fprintf(of,",flow seq=%03x",PCI(pc)->pcflow->pc.seq);
+ if(debug_verbose) {
+ fprintf(of, "\t;key=%03x",pc->seq);
+ if(PCI(pc)->pcflow)
+ fprintf(of,",flow seq=%03x",PCI(pc)->pcflow->pc.seq);
+ }
}
#if 0
{
break;
case PC_FLOW:
- fprintf(of,";<>Start of new flow, seq=%d\n",pc->seq);
+ if(debug_verbose)
+ fprintf(of,";<>Start of new flow, seq=%d\n",pc->seq);
break;
case PC_CSOURCE:
/*-----------------------------------------------------------------*/
/*-----------------------------------------------------------------*/
-static pBranch * pBranchAppend(pBranch *h, pBranch *n)
+pBranch * pBranchAppend(pBranch *h, pBranch *n)
{
pBranch *b;
if(!h)
return n;
+ if(h == n)
+ return n;
+
b = h;
while(b->next)
b = b->next;
fprintf(stderr,"analyze PC_FLOW\n");
return;
+ case PC_BAD:
+ fprintf(stderr,,";A bad pCode is being used\n");
+
}
}
#endif
return FALSE;
}
+/*-----------------------------------------------------------------*/
+/* findLabelinpBlock - Search the pCode for a particular label */
+/*-----------------------------------------------------------------*/
+pCode * findLabelinpBlock(pBlock *pb,pCodeOpLabel *pcop_label)
+{
+ pCode *pc;
+
+ if(!pb)
+ return NULL;
+
+ for(pc = pb->pcHead; pc; pc = pc->next)
+ if(compareLabel(pc,pcop_label))
+ return pc;
+
+ return NULL;
+}
+
/*-----------------------------------------------------------------*/
/* findLabel - Search the pCode for a particular label */
/*-----------------------------------------------------------------*/
return NULL;
for(pb = the_pFile->pbHead; pb; pb = pb->next) {
- for(pc = pb->pcHead; pc; pc = pc->next)
- if(compareLabel(pc,pcop_label))
- return pc;
-
+ if( (pc = findLabelinpBlock(pb,pcop_label)) != NULL)
+ return pc;
}
fprintf(stderr,"Couldn't find label %s", pcop_label->pcop.name);
/*-----------------------------------------------------------------*/
regs * getRegFromInstruction(pCode *pc)
{
+
if(!pc ||
!isPCI(pc) ||
!PCI(pc)->pcop ||
switch(PCI(pc)->pcop->type) {
case PO_INDF:
case PO_FSR:
- return pic14_regWithIdx(PCOR(PCI(pc)->pcop)->rIdx);
+ return PCOR(PCI(pc)->pcop)->r;
+
+ // return typeRegWithIdx (PCOR(PCI(pc)->pcop)->rIdx, REG_SFR, 0);
case PO_BIT:
case PO_GPR_TEMP:
return PCOR(PCI(pc)->pcop)->r;
case PO_IMMEDIATE:
+ if(PCOI(PCI(pc)->pcop)->r)
+ return (PCOI(PCI(pc)->pcop)->r);
+
//fprintf(stderr, "getRegFromInstruction - immediate\n");
- return NULL; // PCOR(PCI(pc)->pcop)->r;
+ return dirregWithName(PCI(pc)->pcop->name);
+ //return NULL; // PCOR(PCI(pc)->pcop)->r;
case PO_GPR_BIT:
return PCOR(PCI(pc)->pcop)->r;
if(!r) {
/* register wasn't found */
- r = Safe_calloc(1, sizeof(regs));
- memcpy(r,PCOR(PCI(pc)->pcop)->r, sizeof(regs));
- addSet(&pb->tregisters, r);
- PCOR(PCI(pc)->pcop)->r = r;
+ //r = Safe_calloc(1, sizeof(regs));
+ //memcpy(r,PCOR(PCI(pc)->pcop)->r, sizeof(regs));
+ //addSet(&pb->tregisters, r);
+ addSet(&pb->tregisters, PCOR(PCI(pc)->pcop)->r);
+ //PCOR(PCI(pc)->pcop)->r = r;
//fprintf(stderr,"added register to pblock: reg %d\n",r->rIdx);
}/* else
fprintf(stderr,"found register in pblock: reg %d\n",r->rIdx);
void InsertpFlow(pCode *pc, pCode **pflow)
{
- PCFL(*pflow)->end = pc;
+ if(*pflow)
+ PCFL(*pflow)->end = pc;
if(!pc || !pc->next)
return;
{
pCode *pc;
pCode *last_pci=NULL;
- pCode *pflow;
+ pCode *pflow=NULL;
int seq = 0;
if(!pb)
//fprintf (stderr,"build flow start seq %d ",GpcFlowSeq);
/* Insert a pCodeFlow object at the beginning of a pBlock */
- pflow = newpCodeFlow(); /* Create a new Flow object */
- pflow->next = pb->pcHead; /* Make the current head the next object */
- pb->pcHead->prev = pflow; /* let the current head point back to the flow object */
- pb->pcHead = pflow; /* Make the Flow object the head */
- pflow->pb = pb;
+ InsertpFlow(pb->pcHead, &pflow);
+
+ //pflow = newpCodeFlow(); /* Create a new Flow object */
+ //pflow->next = pb->pcHead; /* Make the current head the next object */
+ //pb->pcHead->prev = pflow; /* let the current head point back to the flow object */
+ //pb->pcHead = pflow; /* Make the Flow object the head */
+ //pflow->pb = pb;
- for( pc = findNextInstruction(pb->pcHead);
- (pc=findNextInstruction(pc)) != NULL; ) {
+ for( pc = findNextInstruction(pb->pcHead);
+ pc != NULL;
+ pc=findNextInstruction(pc)) {
pc->seq = seq++;
PCI(pc)->pcflow = PCFL(pflow);
+ //fprintf(stderr," build: ");
+ //pflow->print(stderr,pflow);
+
if( PCI(pc)->isSkip) {
/* The two instructions immediately following this one
}
//fprintf (stderr,",end seq %d",GpcFlowSeq);
- PCFL(pflow)->end = pb->pcTail;
+ if(pflow)
+ PCFL(pflow)->end = pb->pcTail;
}
/*-------------------------------------------------------------------*/
/*-----------------------------------------------------------------*/
void unBuildFlow(pBlock *pb)
{
- pCode *pc;
+ pCode *pc,*pcnext;
if(!pb)
return;
pc = pb->pcHead;
+
while(pc) {
- pCode *pcn = pc->next;
+ pcnext = pc->next;
if(isPCI(pc)) {
+
pc->seq = 0;
- PCI(pc)->pcflow = NULL;
- pc = pcn;
- } else if(isPCFL(pc)) {
- unlinkPC(pc);
+ if(PCI(pc)->pcflow) {
+ //free(PCI(pc)->pcflow);
+ PCI(pc)->pcflow = NULL;
+ }
+
+ } else if(isPCFL(pc) )
pc->destruct(pc);
- } else
- pc = pcn;
+ pc = pcnext;
}
+
}
/*-----------------------------------------------------------------*/
}
+/*-----------------------------------------------------------------*
+ * int isBankInstruction(pCode *pc) - examine the pCode *pc to determine
+ * if it affects the banking bits.
+ *
+ * return: -1 == Banking bits are unaffected by this pCode.
+ *
+ * return: > 0 == Banking bits are affected.
+ *
+ * If the banking bits are affected, then the returned value describes
+ * which bits are affected and how they're affected. The lower half
+ * of the integer maps to the bits that are affected, the upper half
+ * to whether they're set or cleared.
+ *
+ *-----------------------------------------------------------------*/
+#define SET_BANK_BIT (1 << 16)
+#define CLR_BANK_BIT 0
+
+int isBankInstruction(pCode *pc)
+{
+ regs *reg;
+ int bank = -1;
+
+ if(!isPCI(pc))
+ return -1;
+
+ if( ( (reg = getRegFromInstruction(pc)) != NULL) && isSTATUS_REG(reg)) {
+
+ /* Check to see if the register banks are changing */
+ if(PCI(pc)->isModReg) {
+
+ pCodeOp *pcop = PCI(pc)->pcop;
+ switch(PCI(pc)->op) {
+
+ case POC_BSF:
+ if(PCORB(pcop)->bit == PIC_RP0_BIT) {
+ //fprintf(stderr, " isBankInstruction - Set RP0\n");
+ return SET_BANK_BIT | PIC_RP0_BIT;
+ }
+
+ if(PCORB(pcop)->bit == PIC_RP1_BIT) {
+ //fprintf(stderr, " isBankInstruction - Set RP1\n");
+ return CLR_BANK_BIT | PIC_RP0_BIT;
+ }
+ break;
+
+ case POC_BCF:
+ if(PCORB(pcop)->bit == PIC_RP0_BIT) {
+ //fprintf(stderr, " isBankInstruction - Clr RP0\n");
+ return CLR_BANK_BIT | PIC_RP1_BIT;
+ }
+ if(PCORB(pcop)->bit == PIC_RP1_BIT) {
+ //fprintf(stderr, " isBankInstruction - Clr RP1\n");
+ return CLR_BANK_BIT | PIC_RP1_BIT;
+ }
+ break;
+ default:
+ //fprintf(stderr, " isBankInstruction - Status register is getting Modified by:\n");
+ //genericPrint(stderr, pc);
+ ;
+ }
+ }
+
+ }
+
+ return bank;
+}
+
+
/*-----------------------------------------------------------------*/
/*-----------------------------------------------------------------*/
void FillFlow(pCodeFlow *pcflow)
cur_bank = -1;
do {
- regs *reg;
-
- if(isPCI(pc)) {
-
- int inCond = PCI(pc)->inCond;
- int outCond = PCI(pc)->outCond;
-
- if( (reg = getRegFromInstruction(pc)) != NULL) {
- if(isSTATUS_REG(reg)) {
-
- //fprintf(stderr, " FillFlow - Status register\n");
- //pc->print(stderr,pc);
- /* Check to see if the register banks are changing */
- if(PCI(pc)->isModReg) {
-
- pCodeOp *pcop = PCI(pc)->pcop;
- switch(PCI(pc)->op) {
- /*
- case POC_BSF:
- if(PCORB(pcop)->bit == PIC_RP0_BIT)
- fprintf(stderr, " FillFlow - Set RP0\n");
- //outCond |= PCC_REG_BANK1;
- if(PCORB(pcop)->bit == PIC_RP1_BIT)
- //fprintf(stderr, " FillFlow - Set RP1\n");
- //outCond |= PCC_REG_BANK3;
- break;
-
- case POC_BCF:
- if(PCORB(pcop)->bit == PIC_RP0_BIT)
- fprintf(stderr, " FillFlow - Clr RP0\n");
- //outCond |= PCC_REG_BANK1;
- if(PCORB(pcop)->bit == PIC_RP1_BIT)
- fprintf(stderr, " FillFlow - Clr RP1\n");
- //outCond |= PCC_REG_BANK3;
- break;
- */
- default:
- fprintf(stderr, " FillFlow - Status register is getting Modified by:\n");
- genericPrint(stderr, pc);
- }
- }
-
- } else
- inCond |= PCC_REG_BANK0 << (REG_BANK(reg) & 3);
- }
-
- pcflow->inCond |= (inCond & ~pcflow->outCond);
- pcflow->outCond |= outCond;
- }
-
+ isBankInstruction(pc);
pc = pc->next;
} while (pc && (pc != pcflow->end) && !isPCFL(pc));
/*-----------------------------------------------------------------*/
void LinkFlow_pCode(pCodeInstruction *from, pCodeInstruction *to)
{
+ pCodeFlowLink *fromLink, *toLink;
if(!from || !to || !to->pcflow || !from->pcflow)
return;
- addSet(&(from->pcflow->to), to->pcflow);
- addSet(&(to->pcflow->from), from->pcflow);
+ fromLink = newpCodeFlowLink(from->pcflow);
+ toLink = newpCodeFlowLink(to->pcflow);
+
+ addSetIfnotP(&(from->pcflow->to), toLink); //to->pcflow);
+ addSetIfnotP(&(to->pcflow->from), fromLink); //from->pcflow);
}
-/*-----------------------------------------------------------------*/
-/*-----------------------------------------------------------------*/
+/*-----------------------------------------------------------------*
+ * void LinkFlow(pBlock *pb)
+ *
+ * In BuildFlow, the PIC code has been partitioned into contiguous
+ * non-branching segments. In LinkFlow, we determine the execution
+ * order of these segments. For example, if one of the segments ends
+ * with a skip, then we know that there are two possible flow segments
+ * to which control may be passed.
+ *-----------------------------------------------------------------*/
void LinkFlow(pBlock *pb)
{
pCode *pc=NULL;
pCode *pct;
//fprintf(stderr,"linkflow \n");
+
for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
- (pcflow = findNextpCode(pcflow->next, PC_FLOW)) != NULL;) {
+ pcflow != NULL;
+ pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
if(!isPCFL(pcflow))
fprintf(stderr, "LinkFlow - pcflow is not a flow object ");
+ //fprintf(stderr," link: ");
+ //pcflow->print(stderr,pcflow);
+
//FillFlow(PCFL(pcflow));
pc = PCFL(pcflow)->end;
//fprintf(stderr, "LinkFlow - flow block (seq=%d) ", pcflow->seq);
if(isPCI_SKIP(pc)) {
//fprintf(stderr, "ends with skip\n");
+ //pc->print(stderr,pc);
pct=findNextInstruction(pc->next);
LinkFlow_pCode(PCI(pc),PCI(pct));
pct=findNextInstruction(pct->next);
continue;
}
- //if(isPCI_BRANCH(pc)) {
- //fprintf(stderr, "ends with branch\n");
+ if(isPCI_BRANCH(pc)) {
+ pCodeOpLabel *pcol = PCOLAB(PCI(pc)->pcop);
+
+ //fprintf(stderr, "ends with branch\n ");
+ //pc->print(stderr,pc);
+
+ if(!(pcol && isPCOLAB(pcol))) {
+ if((PCI(pc)->op != POC_RETLW) && (PCI(pc)->op != POC_RETURN) && (PCI(pc)->op != POC_CALL)) {
+ pc->print(stderr,pc);
+ fprintf(stderr, "ERROR: %s, branch instruction doesn't have label\n",__FUNCTION__);
+ }
+ continue;
+ }
+
+ if( (pct = findLabelinpBlock(pb,pcol)) != NULL)
+ LinkFlow_pCode(PCI(pc),PCI(pct));
+ else
+ fprintf(stderr, "ERROR: %s, couldn't find label\n",__FUNCTION__);
+
+ continue;
+ }
- // continue;
- //}
- #if 0
if(isPCI(pc)) {
- fprintf(stderr, "ends with non-branching instruction:\n");
+ //fprintf(stderr, "ends with non-branching instruction:\n");
+ //pc->print(stderr,pc);
+
+ LinkFlow_pCode(PCI(pc),PCI(findNextInstruction(pc->next)));
+
+ continue;
+ }
+
+ if(pc) {
+ //fprintf(stderr, "ends with unknown\n");
//pc->print(stderr,pc);
+ continue;
}
- else
- fprintf(stderr, "has no end pcode\n");
- #endif
+
+ //fprintf(stderr, "ends with nothing: ERROR\n");
}
}
+/*-----------------------------------------------------------------*/
+/*-----------------------------------------------------------------*/
+
+/*-----------------------------------------------------------------*/
+/*-----------------------------------------------------------------*/
+int isPCinFlow(pCode *pc, pCode *pcflow)
+{
+
+ if(!pc || !pcflow)
+ return 0;
+
+ if(!isPCI(pc) || !PCI(pc)->pcflow || !isPCFL(pcflow) )
+ return 0;
+
+ if( PCI(pc)->pcflow->pc.seq == pcflow->seq)
+ return 1;
+
+ return 0;
+}
+
+/*-----------------------------------------------------------------*/
+/*-----------------------------------------------------------------*/
+void BanksUsedFlow2(pCode *pcflow)
+{
+ pCode *pc=NULL;
+
+ int bank = -1;
+ bool RegUsed = 0;
+
+ regs *reg;
+
+ if(!isPCFL(pcflow)) {
+ fprintf(stderr, "BanksUsed - pcflow is not a flow object ");
+ return;
+ }
+
+ pc = findNextInstruction(pcflow->next);
+
+ PCFL(pcflow)->lastBank = -1;
+
+ while(isPCinFlow(pc,pcflow)) {
+
+ int bank_selected = isBankInstruction(pc);
+
+ //if(PCI(pc)->pcflow)
+ //fprintf(stderr,"BanksUsedFlow2, looking at seq %d\n",PCI(pc)->pcflow->pc.seq);
+
+ if(bank_selected > 0) {
+ //fprintf(stderr,"BanksUsed - mucking with bank %d\n",bank_selected);
+
+ /* This instruction is modifying banking bits before accessing registers */
+ if(!RegUsed)
+ PCFL(pcflow)->firstBank = -1;
+
+ if(PCFL(pcflow)->lastBank == -1)
+ PCFL(pcflow)->lastBank = 0;
+
+ bank = (1 << (bank_selected & (PIC_RP0_BIT | PIC_RP1_BIT)));
+ if(bank_selected & SET_BANK_BIT)
+ PCFL(pcflow)->lastBank |= bank;
+
+
+ } else {
+ reg = getRegFromInstruction(pc);
+
+ if(reg && !isREGinBank(reg, bank)) {
+ int allbanks = REGallBanks(reg);
+ if(bank == -1)
+ PCFL(pcflow)->firstBank = allbanks;
+
+ PCFL(pcflow)->lastBank = allbanks;
+
+ bank = allbanks;
+ }
+ RegUsed = 1;
+ }
+
+ pc = findNextInstruction(pc->next);
+ }
+
+// fprintf(stderr,"BanksUsedFlow2 flow seq=%3d, first bank = 0x%03x, Last bank 0x%03x\n",
+// pcflow->seq,PCFL(pcflow)->firstBank,PCFL(pcflow)->lastBank);
+
+
+
+}
+/*-----------------------------------------------------------------*/
+/*-----------------------------------------------------------------*/
+void BanksUsedFlow(pBlock *pb)
+{
+ pCode *pcflow;
+
+
+ //pb->pcHead->print(stderr, pb->pcHead);
+
+ pcflow = findNextpCode(pb->pcHead, PC_FLOW);
+ //pcflow->print(stderr,pcflow);
+
+ for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
+ pcflow != NULL;
+ pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
+
+ BanksUsedFlow2(pcflow);
+ }
+
+}
+
+
+/*-----------------------------------------------------------------*/
+/*-----------------------------------------------------------------*/
+void insertBankSwitch(pCode *pc, int Set_Clear, int RP_BankBit)
+{
+ pCode *new_pc;
+
+ if(!pc)
+ return;
+
+ if(RP_BankBit < 0)
+ new_pc = newpCode(POC_CLRF, popCopyReg(&pc_status));
+ else
+ new_pc = newpCode((Set_Clear ? POC_BSF : POC_BCF),
+ popCopyGPR2Bit(PCOP(&pc_status),RP_BankBit));
+
+ pCodeInsertAfter(pc->prev, new_pc);
+
+ /* Move the label, if there is one */
+
+ if(PCI(pc)->label) {
+ PCI(new_pc)->label = PCI(pc)->label;
+ PCI(pc)->label = NULL;
+ }
+
+ /* The new instruction has the same pcflow block */
+ PCI(new_pc)->pcflow = PCI(pc)->pcflow;
+
+}
+/*-----------------------------------------------------------------*/
+/*-----------------------------------------------------------------*/
+void FixRegisterBankingInFlow(pCodeFlow *pcfl, int cur_bank)
+{
+ pCode *pc=NULL;
+ pCode *pcprev=NULL;
+ pCode *new_pc;
+
+ regs *reg;
+
+ if(!pcfl)
+ return;
+
+ pc = findNextInstruction(pcfl->pc.next);
+
+ while(isPCinFlow(pc,PCODE(pcfl))) {
+
+
+ reg = getRegFromInstruction(pc);
+#if 0
+ if(reg) {
+ fprintf(stderr, " %s ",reg->name);
+ fprintf(stderr, "addr = 0x%03x, bank = %d\n",reg->address,REG_BANK(reg));
+
+ }
+#endif
+
+ if(reg && REG_BANK(reg)!=cur_bank) {
+ /* Examine the instruction before this one to make sure it is
+ * not a skip type instruction */
+ pcprev = findPrevpCode(pc->prev, PC_OPCODE);
+ if(!pcprev || (pcprev && !isPCI_SKIP(pcprev))) {
+ int b = cur_bank ^ REG_BANK(reg);
+
+ //fprintf(stderr, "Cool! can switch banks\n");
+ cur_bank = REG_BANK(reg);
+ switch(b & 3) {
+ case 0:
+ break;
+ case 1:
+ insertBankSwitch(pc, cur_bank&1, PIC_RP0_BIT);
+ break;
+ case 2:
+ insertBankSwitch(pc, cur_bank&2, PIC_RP1_BIT);
+ insertBankSwitch(pc, cur_bank&2, PIC_RP1_BIT);
+ break;
+ case 3:
+ if(cur_bank & 3) {
+ insertBankSwitch(pc, cur_bank&1, PIC_RP0_BIT);
+ insertBankSwitch(pc, cur_bank&2, PIC_RP1_BIT);
+ } else
+ insertBankSwitch(pc, -1, -1);
+ break;
+ /*
+ new_pc = newpCode(((cur_bank&1) ? POC_BSF : POC_BCF),
+ popCopyGPR2Bit(PCOP(&pc_status),PIC_RP0_BIT));
+ pCodeInsertAfter(pc->prev, new_pc);
+ if(PCI(pc)->label) {
+ PCI(new_pc)->label = PCI(pc)->label;
+ PCI(pc)->label = NULL;
+ }
+ */
+ /*
+ new_pc = newpCode(((cur_bank&1) ? POC_BCF : POC_BSF),
+ popCopyGPR2Bit(PCOP(&pc_status),PIC_RP0_BIT));
+ pCodeInsertAfter(pc, new_pc);
+ */
+
+ }
+
+ } else {
+ //fprintf(stderr, "Bummer can't switch banks\n");
+ ;
+ }
+ }
+
+ pcprev = pc;
+ pc = findNextInstruction(pc->next);
+
+ }
+
+ if(pcprev && cur_bank) {
+ /* Brute force - make sure that we point to bank 0 at the
+ * end of each flow block */
+ new_pc = newpCode(POC_BCF,
+ popCopyGPR2Bit(PCOP(&pc_status),PIC_RP0_BIT));
+ pCodeInsertAfter(pcprev, new_pc);
+ cur_bank = 0;
+ }
+
+}
+
+/*-----------------------------------------------------------------*/
+/*int compareBankFlow - compare the banking requirements between */
+/* flow objects. */
+/*-----------------------------------------------------------------*/
+int compareBankFlow(pCodeFlow *pcflow, pCodeFlowLink *pcflowLink, int toORfrom)
+{
+
+ if(!pcflow || !pcflowLink || !pcflowLink->pcflow)
+ return 0;
+
+ if(!isPCFL(pcflow) || !isPCFL(pcflowLink->pcflow))
+ return 0;
+
+ if(pcflow->firstBank == -1)
+ return 0;
+
+
+ if(pcflowLink->pcflow->firstBank == -1) {
+ pCodeFlowLink *pctl = setFirstItem( toORfrom ?
+ pcflowLink->pcflow->to :
+ pcflowLink->pcflow->from);
+ return compareBankFlow(pcflow, pctl, toORfrom);
+ }
+
+ if(toORfrom) {
+ if(pcflow->lastBank == pcflowLink->pcflow->firstBank)
+ return 0;
+
+ pcflowLink->bank_conflict++;
+ pcflowLink->pcflow->FromConflicts++;
+ pcflow->ToConflicts++;
+ } else {
+
+ if(pcflow->firstBank == pcflowLink->pcflow->lastBank)
+ return 0;
+
+ pcflowLink->bank_conflict++;
+ pcflowLink->pcflow->ToConflicts++;
+ pcflow->FromConflicts++;
+
+ }
+ /*
+ fprintf(stderr,"compare flow found conflict: seq %d from conflicts %d, to conflicts %d\n",
+ pcflowLink->pcflow->pc.seq,
+ pcflowLink->pcflow->FromConflicts,
+ pcflowLink->pcflow->ToConflicts);
+ */
+ return 1;
+
+}
+/*-----------------------------------------------------------------*/
+/*-----------------------------------------------------------------*/
+void FixBankFlow(pBlock *pb)
+{
+ pCode *pc=NULL;
+ pCode *pcflow;
+ pCodeFlowLink *pcfl;
+
+ pCode *pcflow_max_To=NULL;
+ pCode *pcflow_max_From=NULL;
+ int max_ToConflicts=0;
+ int max_FromConflicts=0;
+
+ //fprintf(stderr,"Fix Bank flow \n");
+ pcflow = findNextpCode(pb->pcHead, PC_FLOW);
+
+
+ /*
+ First loop through all of the flow objects in this pcode block
+ and fix the ones that have banking conflicts between the
+ entry and exit.
+ */
+
+ //fprintf(stderr, "FixBankFlow - Phase 1\n");
+
+ for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
+ pcflow != NULL;
+ pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
+
+ if(!isPCFL(pcflow)) {
+ fprintf(stderr, "FixBankFlow - pcflow is not a flow object ");
+ continue;
+ }
+
+ if(PCFL(pcflow)->firstBank != PCFL(pcflow)->lastBank &&
+ PCFL(pcflow)->firstBank >= 0 &&
+ PCFL(pcflow)->lastBank >= 0 ) {
+
+ int cur_bank = (PCFL(pcflow)->firstBank < PCFL(pcflow)->lastBank) ?
+ PCFL(pcflow)->firstBank : PCFL(pcflow)->lastBank;
+
+ FixRegisterBankingInFlow(PCFL(pcflow),cur_bank);
+ BanksUsedFlow2(pcflow);
+
+ }
+ }
+
+ //fprintf(stderr, "FixBankFlow - Phase 2\n");
+
+ for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
+ pcflow != NULL;
+ pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
+
+ int nFlows;
+ int nConflicts;
+
+ if(!isPCFL(pcflow)) {
+ fprintf(stderr, "FixBankFlow - pcflow is not a flow object ");
+ continue;
+ }
+
+ PCFL(pcflow)->FromConflicts = 0;
+ PCFL(pcflow)->ToConflicts = 0;
+
+ nFlows = 0;
+ nConflicts = 0;
+
+ //fprintf(stderr, " FixBankFlow flow seq %d\n",pcflow->seq);
+ pcfl = setFirstItem(PCFL(pcflow)->from);
+ while (pcfl) {
+
+ pc = PCODE(pcfl->pcflow);
+
+ if(!isPCFL(pc)) {
+ fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
+ pc->print(stderr,pc);
+ }
+
+ nConflicts += compareBankFlow(PCFL(pcflow), pcfl, 0);
+ nFlows++;
+
+ pcfl=setNextItem(PCFL(pcflow)->from);
+ }
+
+ if((nFlows >= 2) && nConflicts && (PCFL(pcflow)->firstBank>0)) {
+ //fprintf(stderr, " From conflicts flow seq %d, nflows %d ,nconflicts %d\n",pcflow->seq,nFlows, nConflicts);
+
+ FixRegisterBankingInFlow(PCFL(pcflow),0);
+ BanksUsedFlow2(pcflow);
+
+ continue; /* Don't need to check the flow from here - it's already been fixed */
+
+ }
+
+ nFlows = 0;
+ nConflicts = 0;
+
+ pcfl = setFirstItem(PCFL(pcflow)->to);
+ while (pcfl) {
+
+ pc = PCODE(pcfl->pcflow);
+ if(!isPCFL(pc)) {
+ fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
+ pc->print(stderr,pc);
+ }
+
+ nConflicts += compareBankFlow(PCFL(pcflow), pcfl, 1);
+ nFlows++;
+
+ pcfl=setNextItem(PCFL(pcflow)->to);
+ }
+
+ if((nFlows >= 2) && nConflicts &&(nConflicts != nFlows) && (PCFL(pcflow)->lastBank>0)) {
+ //fprintf(stderr, " To conflicts flow seq %d, nflows %d ,nconflicts %d\n",pcflow->seq,nFlows, nConflicts);
+
+ FixRegisterBankingInFlow(PCFL(pcflow),0);
+ BanksUsedFlow2(pcflow);
+ }
+ }
+
+ /*
+ Loop through the flow objects again and find the ones with the
+ maximum conflicts
+ */
+
+ for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
+ pcflow != NULL;
+ pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
+
+ if(PCFL(pcflow)->ToConflicts > max_ToConflicts)
+ pcflow_max_To = pcflow;
+
+ if(PCFL(pcflow)->FromConflicts > max_FromConflicts)
+ pcflow_max_From = pcflow;
+ }
+/*
+ if(pcflow_max_To)
+ fprintf(stderr,"compare flow Max To conflicts: seq %d conflicts %d\n",
+ PCFL(pcflow_max_To)->pc.seq,
+ PCFL(pcflow_max_To)->ToConflicts);
+
+ if(pcflow_max_From)
+ fprintf(stderr,"compare flow Max From conflicts: seq %d conflicts %d\n",
+ PCFL(pcflow_max_From)->pc.seq,
+ PCFL(pcflow_max_From)->FromConflicts);
+*/
+}
+
+/*-----------------------------------------------------------------*/
+/*-----------------------------------------------------------------*/
+void DumpFlow(pBlock *pb)
+{
+ pCode *pc=NULL;
+ pCode *pcflow;
+ pCodeFlowLink *pcfl;
+
+
+ fprintf(stderr,"Dump flow \n");
+ pb->pcHead->print(stderr, pb->pcHead);
+
+ pcflow = findNextpCode(pb->pcHead, PC_FLOW);
+ pcflow->print(stderr,pcflow);
+
+ for( pcflow = findNextpCode(pb->pcHead, PC_FLOW);
+ pcflow != NULL;
+ pcflow = findNextpCode(pcflow->next, PC_FLOW) ) {
+
+ if(!isPCFL(pcflow)) {
+ fprintf(stderr, "DumpFlow - pcflow is not a flow object ");
+ continue;
+ }
+ fprintf(stderr,"dumping: ");
+ pcflow->print(stderr,pcflow);
+ FlowStats(PCFL(pcflow));
+
+ for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
+
+ pc = PCODE(pcfl->pcflow);
+
+ fprintf(stderr, " from seq %d:\n",pc->seq);
+ if(!isPCFL(pc)) {
+ fprintf(stderr,"oops dumpflow - from is not a pcflow\n");
+ pc->print(stderr,pc);
+ }
+
+ }
+
+ for(pcfl = setFirstItem(PCFL(pcflow)->to); pcfl; pcfl=setNextItem(PCFL(pcflow)->to)) {
+
+ pc = PCODE(pcfl->pcflow);
+
+ fprintf(stderr, " to seq %d:\n",pc->seq);
+ if(!isPCFL(pc)) {
+ fprintf(stderr,"oops dumpflow - to is not a pcflow\n");
+ pc->print(stderr,pc);
+ }
+
+ }
+
+ }
+
+}
+
/*-----------------------------------------------------------------*/
/*-----------------------------------------------------------------*/
int OptimizepBlock(pBlock *pb)
*/
pc = findNextInstruction(pb->pcHead);
+ if(!pc)
+ return 0;
+
pcprev = pc->prev;
do {
DFPRINTF((stderr," !!! REMOVED A LABEL !!! key = %d, %s\n", pcl->key,pcl->label));
if(pc->type == PC_LABEL) {
- unlinkPC(pc);
+ unlinkpCode(pc);
pCodeLabelDestruct(pc);
} else {
unlinkpCodeFromBranch(pc, PCODE(pcl));
/* Now loop through the pBlock and merge the labels with the opcodes */
- for(pc = pb->pcHead; pc; pc = pc->next) {
+ pc = pb->pcHead;
+ // for(pc = pb->pcHead; pc; pc = pc->next) {
+
+ while(pc) {
+ pCode *pcn = pc->next;
if(pc->type == PC_LABEL) {
//fprintf(stderr,"Checking label key = %d\n",PCL(pc)->key);
if((pcnext = findNextInstruction(pc) )) {
- pCode *pcn = pc->next;
-
// Unlink the pCode label from it's pCode chain
- unlinkPC(pc);
+ unlinkpCode(pc);
//fprintf(stderr,"Merged label key = %d\n",PCL(pc)->key);
// And link it into the instruction's pBranch labels. (Note, since
pbr->pc = pc;
pbr->next = NULL;
-
PCI(pcnext)->label = pBranchAppend(PCI(pcnext)->label,pbr);
-
- pc = pcn;
} else {
fprintf(stderr, "WARNING: couldn't associate label %s with an instruction\n",PCL(pc)->label);
/* merge the source line symbolic info into the next instruction */
if((pcnext = findNextInstruction(pc) )) {
- pCode *pcn = pc->next;
-
// Unlink the pCode label from it's pCode chain
- unlinkPC(pc);
+ unlinkpCode(pc);
PCI(pcnext)->cline = PCCS(pc);
//fprintf(stderr, "merging CSRC\n");
//genericPrint(stderr,pcnext);
- pc = pcn;
}
}
-
+ pc = pcn;
}
pBlockRemoveUnusedLabels(pb);
if(!pb)
return;
- pc = findNextpCode(pb->pcHead, PC_FLOW);
+ //pc = findNextpCode(pb->pcHead, PC_FLOW);
+ pc = findNextpCode(pb->pcHead, PC_OPCODE);
if(!pc)
return;
/* loop through all of the flow blocks with in one pblock */
/* for each flow block, determine the register banking
requirements */
- do {
+ // do {
if(isPCI(pc)) {
//genericPrint(stderr, pc);
pcprev = pc;
pc = pc->next;
- } while(pc && !(isPCFL(pc)));
+ // } while(pc && !(isPCFL(pc)));
+
+
+ }while (pc);
if(pcprev && cur_bank) {
/* Brute force - make sure that we point to bank 0 at the
cur_bank = 0;
}
- }while (pc);
-
}
void pBlockDestruct(pBlock *pb)
}
/*-----------------------------------------------------------------*/
-/* AnalyzeBanking - Called after the memory addresses have been */
-/* assigned to the registers. */
+/* AnalyzeFlow - Examine the flow of the code and optimize */
/* */
+/* level 0 == minimal optimization */
+/* optimize registers that are used only by two instructions */
+/* level 1 == maximal optimization */
+/* optimize by looking at pairs of instructions that use the */
+/* register. */
/*-----------------------------------------------------------------*/
-void AnalyzeBanking(void)
+
+void AnalyzeFlow(int level)
{
+ static int times_called=0;
pBlock *pb;
return;
+ /* if this is not the first time this function has been called,
+ then clean up old flow information */
+ if(times_called++) {
+ for(pb = the_pFile->pbHead; pb; pb = pb->next)
+ unBuildFlow(pb);
+
+ RegsUnMapLiveRanges();
+
+ }
+
+ GpcFlowSeq = 1;
+
+ /* Phase 2 - Flow Analysis - Register Banking
+ *
+ * In this phase, the individual flow blocks are examined
+ * and register banking is fixed.
+ */
+
+ //for(pb = the_pFile->pbHead; pb; pb = pb->next)
+ //FixRegisterBanking(pb);
+
/* Phase 2 - Flow Analysis
*
* In this phase, the pCode is partition into pCodeFlow
for(pb = the_pFile->pbHead; pb; pb = pb->next)
BuildFlow(pb);
+
/* Phase 2 - Flow Analysis - linking flow blocks
*
* In this phase, the individual flow blocks are examined
for(pb = the_pFile->pbHead; pb; pb = pb->next)
LinkFlow(pb);
+ /* Phase 3 - Flow Analysis - Flow Tree
+ *
+ * In this phase, the individual flow blocks are examined
+ * to determine their order of excution.
+ */
+ /*
for(pb = the_pFile->pbHead; pb; pb = pb->next)
- FixRegisterBanking(pb);
+ BuildFlowTree(pb);
+ */
+ /* Phase x - Flow Analysis - Used Banks
+ *
+ * In this phase, the individual flow blocks are examined
+ * to determine the Register Banks they use
+ */
+
+ for(pb = the_pFile->pbHead; pb; pb = pb->next)
+ FixBankFlow(pb);
+
+
+ for(pb = the_pFile->pbHead; pb; pb = pb->next)
+ pCodeRegMapLiveRanges(pb);
+
+ RemoveUnusedRegisters();
+
+ // for(pb = the_pFile->pbHead; pb; pb = pb->next)
+ pCodeRegOptimizeRegUsage(level);
+
+ OptimizepCode('*');
+
+
+/*
+ for(pb = the_pFile->pbHead; pb; pb = pb->next)
+ DumpFlow(pb);
+*/
/* debug stuff */
for(pb = the_pFile->pbHead; pb; pb = pb->next) {
pCode *pcflow;
FillFlow(PCFL(pcflow));
}
}
+
/*
for(pb = the_pFile->pbHead; pb; pb = pb->next) {
pCode *pcflow;
*/
}
+/*-----------------------------------------------------------------*/
+/* AnalyzeBanking - Called after the memory addresses have been */
+/* assigned to the registers. */
+/* */
+/*-----------------------------------------------------------------*/
+
+void AnalyzeBanking(void)
+{
+ pBlock *pb;
+
+ if(!picIsInitialized()) {
+ fprintf(stderr,"Temporary ERROR: at the moment you have to use\n");
+ fprintf(stderr,"an include file create by inc2h.pl. See SDCC source:\n");
+ fprintf(stderr,"support/scripts/inc2h.pl\n");
+ fprintf(stderr,"this is a nuisance bug that will be fixed shortly\n");
+
+ exit(1);
+ }
+
+ /* Phase x - Flow Analysis - Used Banks
+ *
+ * In this phase, the individual flow blocks are examined
+ * to determine the Register Banks they use
+ */
+
+ AnalyzeFlow(0);
+ AnalyzeFlow(1);
+
+ for(pb = the_pFile->pbHead; pb; pb = pb->next)
+ BanksUsedFlow(pb);
+ for(pb = the_pFile->pbHead; pb; pb = pb->next)
+ FixRegisterBanking(pb);
+
+}
+
/*-----------------------------------------------------------------*/
/* buildCallTree - look at the flow and extract all of the calls */
/* */
/* Re-allocate the registers so that there are no collisions
* between local variables when one function call another */
- pic14_deallocateAllRegs();
+ // this is weird...
+ // pic14_deallocateAllRegs();
for(pb = the_pFile->pbHead; pb; pb = pb->next) {
if(!pb->visited)
/*-----------------------------------------------------------------*/
/*-----------------------------------------------------------------*/
+#if 0
static void sequencepCode(void)
{
pBlock *pb;
}
}
+#endif
/*-----------------------------------------------------------------*/
/*-----------------------------------------------------------------*/
if(!the_pFile)
return;
+ if(!functionInlining)
+ return;
/* Loop through all of the function definitions and count the
* number of times each one is called */
/* Now, Loop through the function definitions again, but this
* time inline those functions that have only been called once. */
-
+
InlineFunction(the_pFile->pbHead);
//fprintf(stderr,"inlining %d\n",__LINE__);
projects / fw / sdcc / blobdiff