bitVect *spiltSet;
set *stackSpil;
bitVect *regAssigned;
+ bitVect *totRegAssigned; /* final set of LRs that got into registers */
short blockSpil;
int slocNum;
bitVect *funcrUsed; /* registers used in a function */
regs regs390[] =
{
- {REG_GPR, R2_IDX, REG_GPR, "r2", "ar2", "0", 2, 1},
- {REG_GPR, R3_IDX, REG_GPR, "r3", "ar3", "0", 3, 1},
- {REG_GPR, R4_IDX, REG_GPR, "r4", "ar4", "0", 4, 1},
- {REG_GPR, R5_IDX, REG_GPR, "r5", "ar5", "0", 5, 1},
- {REG_GPR, R6_IDX, REG_GPR, "r6", "ar6", "0", 6, 1},
- {REG_GPR, R7_IDX, REG_GPR, "r7", "ar7", "0", 7, 1},
- {REG_PTR, R0_IDX, REG_PTR, "r0", "ar0", "0", 0, 1},
- {REG_PTR, R1_IDX, REG_PTR, "r1", "ar1", "0", 1, 1},
- {REG_GPR, X8_IDX, REG_GPR, "x8", "x8", "xreg", 0, 1},
- {REG_GPR, X9_IDX, REG_GPR, "x9", "x9", "xreg", 1, 1},
- {REG_GPR, X10_IDX, REG_GPR, "x10", "x10", "xreg", 2, 1},
- {REG_GPR, X11_IDX, REG_GPR, "x11", "x11", "xreg", 3, 1},
- {REG_GPR, X12_IDX, REG_GPR, "x12", "x12", "xreg", 4, 1},
- {REG_CND, CND_IDX, REG_CND, "C", "C", "xreg", 0, 1},
+ {REG_GPR, R2_IDX, REG_GPR, "r2", "ar2", "0", 2, 1, 1},
+ {REG_GPR, R3_IDX, REG_GPR, "r3", "ar3", "0", 3, 1, 1},
+ {REG_GPR, R4_IDX, REG_GPR, "r4", "ar4", "0", 4, 1, 1},
+ {REG_GPR, R5_IDX, REG_GPR, "r5", "ar5", "0", 5, 1, 1},
+ {REG_GPR, R6_IDX, REG_GPR, "r6", "ar6", "0", 6, 1, 1},
+ {REG_GPR, R7_IDX, REG_GPR, "r7", "ar7", "0", 7, 1, 1},
+ {REG_PTR, R0_IDX, REG_PTR, "r0", "ar0", "0", 0, 1, 1},
+ {REG_PTR, R1_IDX, REG_PTR, "r1", "ar1", "0", 1, 1, 1},
+ {REG_GPR, X8_IDX, REG_GPR, "x8", "x8", "xreg", 0, 0, 0},
+ {REG_GPR, X9_IDX, REG_GPR, "x9", "x9", "xreg", 1, 0, 0},
+ {REG_GPR, X10_IDX, REG_GPR, "x10", "x10", "xreg", 2, 0, 0},
+ {REG_GPR, X11_IDX, REG_GPR, "x11", "x11", "xreg", 3, 0, 0},
+ {REG_GPR, X12_IDX, REG_GPR, "x12", "x12", "xreg", 4, 0, 0},
+ {REG_CND, CND_IDX, REG_GPR, "C", "C", "xreg", 0, 0, 0},
+ {REG_GPR, DPL_IDX, REG_GPR, "dpl", "dpl", "dpl", 0, 0, 0},
+ {REG_GPR, DPH_IDX, REG_GPR, "dph", "dph", "dph", 0, 0, 0},
+ {REG_GPR, DPX_IDX, REG_GPR, "dpx", "dpx", "dpx", 0, 0, 0},
+ {REG_GPR, B_IDX, REG_GPR, "b", "b", "b", 0, 0, 0},
};
int ds390_nRegs = 13;
static void spillThis (symbol *);
+static void freeAllRegs ();
/*-----------------------------------------------------------------*/
/* allocReg - allocates register of given type */
reg->isFree = 1;
}
+/*-----------------------------------------------------------------*/
+/* useReg - marks a register as used */
+/*-----------------------------------------------------------------*/
+static void
+useReg (regs * reg)
+{
+ reg->isFree = 0;
+}
+
/*-----------------------------------------------------------------*/
/* nFreeRegs - returns number of free registers */
for (sym = setFirstItem (itmpStack); sym;
sym = setNextItem (itmpStack))
{
- // if sym starts before (or on) our end point
- // and ends after (or on) our start point,
- // it is an overlap.
- if (sym->liveFrom <= fsym->liveTo &&
- sym->liveTo >= fsym->liveFrom)
- {
- return 0;
- }
+ if (bitVectBitValue(sym->clashes,fsym->key)) return 0;
}
return 1;
}
if (applyToSet (_G.stackSpil, isFree, &sloc, sym))
{
/* found a free one : just update & return */
- sym->usl.spillLoc = sloc;
+ sym->usl.spillLoc = sloc;
sym->stackSpil = 1;
sloc->isFree = 0;
addSetHead (&sloc->usl.itmpStack, sym);
SPEC_SCLS (sloc->etype) = S_XDATA;
}
SPEC_EXTR (sloc->etype) = 0;
+ SPEC_STAT (sloc->etype) = 0;
/* we don't allow it to be allocated`
onto the external stack since : so we
/* mark it has spilt & put it in the spilt set */
- sym->isspilt = 1;
+ sym->isspilt = sym->spillA = 1;
_G.spiltSet = bitVectSetBit (_G.spiltSet, sym->key);
bitVectUnSetBit (_G.regAssigned, sym->key);
+ bitVectUnSetBit (_G.totRegAssigned, sym->key);
for (i = 0; i < sym->nRegs; i++)
}
if (sym->usl.spillLoc && !sym->remat)
- sym->usl.spillLoc->allocreq = 1;
+ sym->usl.spillLoc->allocreq++;
return;
}
sym->usl.spillLoc->name));
sym->spildir = 1;
/* mark it as allocation required */
- sym->usl.spillLoc->allocreq = 1;
+ sym->usl.spillLoc->allocreq++;
return sym;
}
sym = leastUsedLR (selectS);
/* mark this as allocation required */
- sym->usl.spillLoc->allocreq = 1;
+ sym->usl.spillLoc->allocreq++;
return sym;
}
{
sym = leastUsedLR (selectS);
- sym->usl.spillLoc->allocreq = 1;
+ sym->usl.spillLoc->allocreq++;
return sym;
}
/* return a created spil location */
sym = createStackSpil (leastUsedLR (selectS));
- sym->usl.spillLoc->allocreq = 1;
+ sym->usl.spillLoc->allocreq++;
return sym;
}
ssym = selectSpil (ic, ebp, forSym);
/* mark it as spilt */
- ssym->isspilt = 1;
+ ssym->isspilt = ssym->spillA = 1;
_G.spiltSet = bitVectSetBit (_G.spiltSet, ssym->key);
/* mark it as not register assigned &
take it away from the set */
bitVectUnSetBit (_G.regAssigned, ssym->key);
+ bitVectUnSetBit (_G.totRegAssigned, ssym->key);
/* mark the registers as free */
for (i = 0; i < ssym->nRegs; i++)
goto tryAgain;
}
+/*-----------------------------------------------------------------*/
+/* getRegPtrNoSpil - get it cannot split */
+/*-----------------------------------------------------------------*/
+static regs *getRegPtrNoSpil()
+{
+ regs *reg;
+
+ /* try for a ptr type */
+ if ((reg = allocReg (REG_PTR)))
+ return reg;
+
+ /* try for gpr type */
+ if ((reg = allocReg (REG_GPR)))
+ return reg;
+
+ assert(0);
+}
+
+/*-----------------------------------------------------------------*/
+/* getRegGprNoSpil - get it cannot split */
+/*-----------------------------------------------------------------*/
+static regs *getRegGprNoSpil()
+{
+
+ regs *reg;
+ if ((reg = allocReg (REG_GPR)))
+ return reg;
+
+ if (!ds390_ptrRegReq)
+ if ((reg = allocReg (REG_PTR)))
+ return reg;
+
+ assert(0);
+}
+
/*-----------------------------------------------------------------*/
/* symHasReg - symbol has a given register */
/*-----------------------------------------------------------------*/
result->regs[i] = getRegGpr (ic, ebp, result);
_G.regAssigned = bitVectSetBit (_G.regAssigned, result->key);
+ _G.totRegAssigned = bitVectSetBit (_G.totRegAssigned, result->key);
}
int i;
/* not spilt any more */
- sym->isspilt = sym->blockSpil = sym->remainSpil = 0;
+ sym->isspilt = sym->spillA = sym->blockSpil = sym->remainSpil = 0;
bitVectUnSetBit (_G.spiltSet, sym->key);
_G.regAssigned = bitVectSetBit (_G.regAssigned, sym->key);
+ _G.totRegAssigned = bitVectSetBit (_G.totRegAssigned, sym->key);
_G.blockSpil--;
/* ult and operand, if this happens make sure they are in the same */
/* position as the operand otherwise chaos results */
/*-----------------------------------------------------------------*/
-static void
-positionRegs (symbol * result, symbol * opsym, int lineno)
+static int
+positionRegs (symbol * result, symbol * opsym)
{
int count = min (result->nRegs, opsym->nRegs);
int i, j = 0, shared = 0;
+ int change = 0;
/* if the result has been spilt then cannot share */
if (opsym->isspilt)
- return;
+ return 0;
again:
shared = 0;
/* first make sure that they actually share */
regs *tmp = result->regs[i];
result->regs[i] = result->regs[j];
result->regs[j] = tmp;
+ change ++;
goto again;
}
+ return change ;
}
/*-----------------------------------------------------------------*/
/* if result is present && is a true symbol */
if (IC_RESULT (ic) && ic->op != IFX &&
IS_TRUE_SYMOP (IC_RESULT (ic)))
- OP_SYMBOL (IC_RESULT (ic))->allocreq = 1;
+ OP_SYMBOL (IC_RESULT (ic))->allocreq++;
/* take away registers from live
ranges that end at this instruction */
/* if none of the liveRanges have a spillLocation then better
to spill this one than anything else already assigned to registers */
if (liveRangesWith(spillable,noSpilLoc,ebbs[i],ic)) {
- spillThis (sym);
- continue;
+ /* if this is local to this block then we might find a block spil */
+ if (!(sym->liveFrom >= ebbs[i]->fSeq && sym->liveTo <= ebbs[i]->lSeq)) {
+ spillThis (sym);
+ continue;
+ }
}
}
}
}
/* else we assign registers to it */
_G.regAssigned = bitVectSetBit (_G.regAssigned, sym->key);
+ _G.totRegAssigned = bitVectSetBit (_G.totRegAssigned, sym->key);
for (j = 0; j < sym->nRegs; j++)
{
if (IC_LEFT (ic) && IS_SYMOP (IC_LEFT (ic)) &&
OP_SYMBOL (IC_LEFT (ic))->nRegs && ic->op != '=')
positionRegs (OP_SYMBOL (IC_RESULT (ic)),
- OP_SYMBOL (IC_LEFT (ic)), ic->lineno);
+ OP_SYMBOL (IC_LEFT (ic)));
/* do the same for the right operand */
if (IC_RIGHT (ic) && IS_SYMOP (IC_RIGHT (ic)) &&
OP_SYMBOL (IC_RIGHT (ic))->nRegs)
positionRegs (OP_SYMBOL (IC_RESULT (ic)),
- OP_SYMBOL (IC_RIGHT (ic)), ic->lineno);
+ OP_SYMBOL (IC_RIGHT (ic)));
if (ptrRegSet)
{
}
}
+/*-----------------------------------------------------------------*/
+/* fillGaps - Try to fill in the Gaps left by Pass1 */
+/*-----------------------------------------------------------------*/
+static void fillGaps()
+{
+ symbol *sym =NULL;
+ int key =0;
+
+ if (getenv("DISABLE_FILL_GAPS")) return;
+ /* look for livernages that was spilt by the allocator */
+ for (sym = hTabFirstItem(liveRanges,&key) ; sym ;
+ sym = hTabNextItem(liveRanges,&key)) {
+
+ int i;
+ int pdone = 0;
+
+ if (!sym->spillA || !sym->clashes || sym->remat) continue ;
+
+ /* find the liveRanges this one clashes with, that are
+ still assigned to registers & mark the registers as used*/
+ for ( i = 0 ; i < sym->clashes->size ; i ++) {
+ int k;
+ symbol *clr;
+
+ if (bitVectBitValue(sym->clashes,i) == 0 || /* those that clash with this */
+ bitVectBitValue(_G.totRegAssigned,i) == 0) /* and are still assigned to registers */
+ continue ;
+
+ assert (clr = hTabItemWithKey(liveRanges,i));
+
+ /* mark these registers as used */
+ for (k = 0 ; k < clr->nRegs ; k++ )
+ useReg(clr->regs[k]);
+ }
+
+ if (willCauseSpill(sym->nRegs,sym->regType)) {
+ /* NOPE :( clear all registers & and continue */
+ freeAllRegs();
+ continue ;
+ }
+
+ /* THERE IS HOPE !!!! */
+ for (i=0; i < sym->nRegs ; i++ ) {
+ if (sym->regType == REG_PTR)
+ sym->regs[i] = getRegPtrNoSpil ();
+ else
+ sym->regs[i] = getRegGprNoSpil ();
+ }
+
+ /* for all its definitions check if the registers
+ allocated needs positioning NOTE: we can position
+ only ONCE if more than One positioning required
+ then give up */
+ sym->isspilt = 0;
+ for (i = 0 ; i < sym->defs->size ; i++ ) {
+ if (bitVectBitValue(sym->defs,i)) {
+ iCode *ic;
+ if (!(ic = hTabItemWithKey(iCodehTab,i))) continue ;
+ if (SKIP_IC(ic)) continue;
+ assert(isSymbolEqual(sym,OP_SYMBOL(IC_RESULT(ic)))); /* just making sure */
+ /* if left is assigned to registers */
+ if (IS_SYMOP(IC_LEFT(ic)) &&
+ bitVectBitValue(_G.totRegAssigned,OP_SYMBOL(IC_LEFT(ic))->key)) {
+ pdone += positionRegs(sym,OP_SYMBOL(IC_LEFT(ic)));
+ }
+ if (IS_SYMOP(IC_RIGHT(ic)) &&
+ bitVectBitValue(_G.totRegAssigned,OP_SYMBOL(IC_RIGHT(ic))->key)) {
+ pdone += positionRegs(sym,OP_SYMBOL(IC_RIGHT(ic)));
+ }
+ if (pdone > 1) break;
+ }
+ }
+ /* had to position more than once GIVE UP */
+ if (pdone > 1) {
+ /* UNDO all the changes we made to try this */
+ sym->isspilt = 0;
+ for (i=0; i < sym->nRegs ; i++ ) {
+ sym->regs[i] = NULL;
+ }
+ freeAllRegs();
+ printf("Fill Gap gave up due to positioning for %s in function %s\n",sym->name, currFunc ? currFunc->name : "UNKNOWN");
+ continue ;
+ }
+ printf("FILLED GAP for %s in function %s\n",sym->name, currFunc ? currFunc->name : "UNKNOWN");
+ _G.totRegAssigned = bitVectSetBit(_G.totRegAssigned,sym->key);
+ sym->isspilt = sym->spillA = 0 ;
+ sym->usl.spillLoc->allocreq--;
+ freeAllRegs();
+ }
+}
+
/*-----------------------------------------------------------------*/
/* rUmaskForOp :- returns register mask for an operand */
/*-----------------------------------------------------------------*/
"createRegMask cannot find live range");
exit (0);
}
-
+
+ /* special case for ruonly */
+ if (sym->ruonly && sym->liveFrom != sym->liveTo) {
+ int size = getSize(sym->type);
+ int j = DPL_IDX;
+ for (k = 0 ; k < size; k++ )
+ ic->rMask = bitVectSetBit (ic->rMask, j++);
+ continue ;
+ }
/* if no register assigned to it */
if (!sym->nRegs || sym->isspilt)
continue;
/* found the definition */
/* replace the result with the result of */
/* this assignment and remove this assignment */
+ bitVectUnSetBit(OP_SYMBOL(IC_RESULT(dic))->defs,dic->key);
IC_RESULT (dic) = IC_RESULT (ic);
if (IS_ITEMP (IC_RESULT (dic)) && OP_SYMBOL (IC_RESULT (dic))->liveFrom > dic->seq)
}
remiCodeFromeBBlock (ebp, ic);
+ bitVectUnSetBit(OP_SYMBOL(IC_RESULT(ic))->defs,ic->key);
hTabDeleteItem (&iCodehTab, ic->key, ic, DELETE_ITEM, NULL);
OP_DEFS (IC_RESULT (dic)) = bitVectSetBit (OP_DEFS (IC_RESULT (dic)), dic->key);
return 1;
IC_LEFT (ic)->operand.symOperand =
IC_RIGHT (dic)->operand.symOperand;
IC_LEFT (ic)->key = IC_RIGHT (dic)->operand.symOperand->key;
+ bitVectUnSetBit(OP_SYMBOL(IC_RESULT(dic))->defs,dic->key);
remiCodeFromeBBlock (ebp, dic);
hTabDeleteItem (&iCodehTab, dic->key, dic, DELETE_ITEM, NULL);
change++;
IC_RIGHT (ic)->key = IC_RIGHT (dic)->operand.symOperand->key;
remiCodeFromeBBlock (ebp, dic);
+ bitVectUnSetBit(OP_SYMBOL(IC_RESULT(dic))->defs,dic->key);
hTabDeleteItem (&iCodehTab, dic->key, dic, DELETE_ITEM, NULL);
change++;
}
/*-----------------------------------------------------------------*/
-/* packRegsForOneuse : - will reduce some registers for single Use */
+/* packRegsDPTRuse : - will reduce some registers for single Use */
/*-----------------------------------------------------------------*/
static iCode *
-packRegsForOneuse (iCode * ic, operand * op, eBBlock * ebp)
+packRegsDPTRuse (iCode * lic, operand * op, eBBlock * ebp)
{
-#if 1
-
- /* I can't figure out how to make this safe yet. */
- if ((int)ic+(int)op+(int)ebp) {
- return 0;
- } else {
- return 0;
- }
- return NULL;
-
-#else
- bitVect *uses;
- iCode *dic, *sic;
-
- /* if returning a literal then do nothing */
- if (!IS_SYMOP (op))
- return NULL;
-
- /* only upto 2 bytes since we cannot predict
- the usage of b, & acc */
- if (getSize (operandType (op)) > (fReturnSizeDS390 - 2))
- return 0;
-
- if (ic->op != RETURN &&
- ic->op != SEND &&
- !POINTER_SET (ic) &&
- !POINTER_GET (ic))
- return NULL;
-
- /* this routine will mark the a symbol as used in one
- instruction use only && if the defintion is local
- (ie. within the basic block) && has only one definition &&
- that definiion is either a return value from a
- function or does not contain any variables in
- far space */
- uses = bitVectCopy (OP_USES (op));
- bitVectUnSetBit (uses, ic->key); /* take away this iCode */
- if (!bitVectIsZero (uses)) /* has other uses */
- return NULL;
-
- /* if it has only one defintion */
- if (bitVectnBitsOn (OP_DEFS (op)) > 1)
- return NULL; /* has more than one definition */
-
- /* get the that definition */
- if (!(dic =
- hTabItemWithKey (iCodehTab,
- bitVectFirstBit (OP_DEFS (op)))))
- return NULL;
-
- /* if that only usage is a cast */
- if (dic->op == CAST) {
- /* to a bigger type */
- if (getSize(OP_SYM_TYPE(IC_RESULT(dic))) >
- getSize(OP_SYM_TYPE(IC_RIGHT(dic)))) {
- /* than we can not, since we cannot predict the usage of b & acc */
- return NULL;
- }
- }
-
- /* found the definition now check if it is local */
- if (dic->seq < ebp->fSeq ||
- dic->seq > ebp->lSeq)
- return NULL; /* non-local */
-
- /* now check if it is the return from
- a function call */
- if (dic->op == CALL || dic->op == PCALL)
- {
- if (ic->op != SEND && ic->op != RETURN)
- {
- OP_SYMBOL (op)->ruonly = 1;
- return dic;
+ /* go thru entire liveRange of this variable & check for
+ other possible usage of DPTR , if we don't find it the
+ assign this to DPTR (ruonly)
+ */
+ int i, key;
+ symbol *sym;
+ iCode *ic, *dic;
+ sym_link *type, *etype;
+
+ if (!IS_SYMOP(op) || !IS_ITEMP(op)) return NULL;
+ if (OP_SYMBOL(op)->remat || OP_SYMBOL(op)->ruonly) return NULL;
+
+ /* first check if any overlapping liverange has already been
+ assigned to DPTR */
+ if (OP_SYMBOL(op)->clashes) {
+ for (i = 0 ; i < OP_SYMBOL(op)->clashes->size ; i++ ) {
+ if (bitVectBitValue(OP_SYMBOL(op)->clashes,i)) {
+ sym = hTabItemWithKey(liveRanges,i);
+ if (sym->ruonly) return NULL ;
+ }
}
- dic = dic->next;
}
+ /* no then go thru this guys live range */
+ dic = ic = hTabFirstItemWK(iCodeSeqhTab,OP_SYMBOL(op)->liveFrom);
+ for (; ic && ic->seq <= OP_SYMBOL(op)->liveTo;
+ ic = hTabNextItem(iCodeSeqhTab,&key)) {
- /* otherwise check that the definition does
- not contain any symbols in far space */
- if (isOperandInFarSpace (IC_LEFT (dic)) ||
- isOperandInFarSpace (IC_RIGHT (dic)) ||
- IS_OP_RUONLY (IC_LEFT (ic)) ||
- IS_OP_RUONLY (IC_RIGHT (ic)))
- {
- return NULL;
- }
+ if (SKIP_IC3(ic)) continue;
- /* if pointer set then make sure the pointer
- is one byte */
- if (POINTER_SET (dic) &&
- !IS_DATA_PTR (aggrToPtr (operandType (IC_RESULT (dic)), FALSE)))
- return NULL;
-
- if (POINTER_GET (dic) &&
- !IS_DATA_PTR (aggrToPtr (operandType (IC_LEFT (dic)), FALSE)))
- return NULL;
-
- sic = dic;
+ /* if PCALL cannot be sure give up */
+ if (ic->op == PCALL) return NULL;
- /* also make sure the intervenening instructions
- don't have any thing in far space */
- for (dic = dic->next; dic && dic != ic; dic = dic->next)
- {
-
- /* if there is an intervening function call then no */
- if (dic->op == CALL || dic->op == PCALL)
- return NULL;
- /* if pointer set then make sure the pointer
- is one byte */
- if (POINTER_SET (dic) &&
- !IS_DATA_PTR (aggrToPtr (operandType (IC_RESULT (dic)), FALSE)))
- return NULL;
-
- if (POINTER_GET (dic) &&
- !IS_DATA_PTR (aggrToPtr (operandType (IC_LEFT (dic)), FALSE)))
- return NULL;
-
- /* if address of & the result is remat the okay */
- if (dic->op == ADDRESS_OF &&
- OP_SYMBOL (IC_RESULT (dic))->remat)
- continue;
-
- /* if operand has size of three or more & this
- operation is a '*','/' or '%' then 'b' may
- cause a problem */
- if ((dic->op == '%' || dic->op == '/' || dic->op == '*') &&
- getSize (operandType (op)) >= 3)
- return NULL;
-
- /* if left or right or result is in far space */
- if (isOperandInFarSpace (IC_LEFT (dic)) ||
- isOperandInFarSpace (IC_RIGHT (dic)) ||
- isOperandInFarSpace (IC_RESULT (dic)) ||
- IS_OP_RUONLY (IC_LEFT (dic)) ||
- IS_OP_RUONLY (IC_RIGHT (dic)) ||
- IS_OP_RUONLY (IC_RESULT (dic)))
- {
- return NULL;
+ /* if CALL then make sure it is VOID || return value not used */
+ if (ic->op == CALL) {
+ if (OP_SYMBOL(IC_RESULT(ic))->liveTo ==
+ OP_SYMBOL(IC_RESULT(ic))->liveFrom) continue ;
+ etype = getSpec(type = operandType(IC_RESULT(ic)));
+ if (getSize(type) == 0) continue ;
+ return NULL ;
}
- }
- OP_SYMBOL (op)->ruonly = 1;
- return sic;
-#endif
+ /* special case of add with a [remat] */
+ if (ic->op == '+' &&
+ OP_SYMBOL(IC_LEFT(ic))->remat &&
+ !isOperandInFarSpace(IC_RIGHT(ic))) continue ;
+
+ /* special case */
+ /* pointerGet */
+ if (POINTER_GET(ic) && isOperandEqual(IC_RESULT(ic),op) &&
+ getSize(operandType(IC_LEFT(ic))) > 1) return NULL ;
+
+ if (POINTER_SET(ic) && isOperandEqual(IC_RIGHT(ic),op) &&
+ getSize(operandType(IC_RESULT(ic))) > 1) return NULL;
+
+ /* general case */
+ if (IC_RESULT(ic) && IS_SYMOP(IC_RESULT(ic)) &&
+ !isOperandEqual(IC_RESULT(ic),op) &&
+ (isOperandInFarSpace(IC_RESULT(ic)) ||
+ OP_SYMBOL(IC_RESULT(ic))->ruonly ||
+ OP_SYMBOL(IC_RESULT(ic))->onStack)) return NULL;
+
+ if (IC_RIGHT(ic) && IS_SYMOP(IC_RIGHT(ic)) &&
+ !isOperandEqual(IC_RIGHT(ic),op) &&
+ (OP_SYMBOL(IC_RIGHT(ic))->liveTo > ic->seq ||
+ IS_TRUE_SYMOP(IC_RIGHT(ic)) ||
+ OP_SYMBOL(IC_RIGHT(ic))->ruonly) &&
+ (isOperandInFarSpace(IC_RIGHT(ic)) ||
+ OP_SYMBOL(IC_RIGHT(ic))->onStack)) return NULL;
+
+ if (IC_LEFT(ic) && IS_SYMOP(IC_LEFT(ic)) &&
+ !isOperandEqual(IC_LEFT(ic),op) &&
+ (OP_SYMBOL(IC_LEFT(ic))->liveTo > ic->seq ||
+ IS_TRUE_SYMOP(IC_LEFT(ic)) ||
+ OP_SYMBOL(IC_LEFT(ic))->ruonly) &&
+ (isOperandInFarSpace(IC_LEFT(ic)) ||
+ OP_SYMBOL(IC_LEFT(ic))->onStack)) return NULL;
+
+ if (IC_LEFT(ic) && IC_RIGHT(ic) &&
+ IS_ITEMP(IC_LEFT(ic)) && IS_ITEMP(IC_RIGHT(ic)) &&
+ isOperandInFarSpace(IC_LEFT(ic)) && isOperandInFarSpace(IC_RIGHT(ic)))
+ return NULL;
+ }
+ OP_SYMBOL(op)->ruonly = 1;
+ return dic;
}
/*-----------------------------------------------------------------*/
{
iCode *uic;
+ /* if this is an aggregate, e.g. a one byte char array */
+ if (IS_AGGREGATE(operandType(IC_RESULT(ic)))) {
+ return;
+ }
+
/* if + or - then it has to be one byte result */
if ((ic->op == '+' || ic->op == '-')
&& getSize (operandType (IC_RESULT (ic))) > 1)
IC_LEFT (ic) = IC_RIGHT (dic);
remiCodeFromeBBlock (ebp, dic);
+ bitVectUnSetBit(OP_SYMBOL(IC_RESULT(dic))->defs,dic->key);
hTabDeleteItem (&iCodehTab, dic->key, dic, DELETE_ITEM, NULL);
}
/* some cases the redundant moves can
can be eliminated for return statements */
- if ((ic->op == RETURN || ic->op == SEND) &&
+ if ((ic->op == RETURN || ic->op == SEND) &&
!isOperandInFarSpace (IC_LEFT (ic)) &&
- !options.model)
- packRegsForOneuse (ic, IC_LEFT (ic), ebp);
+ !options.model) {
+
+ packRegsDPTRuse (ic, IC_LEFT (ic), ebp);
+ }
+
+ if ((ic->op == CALL && getSize(operandType(IC_RESULT(ic))) <= 4)) {
+ packRegsDPTRuse (ic, IC_RESULT (ic), ebp);
+ }
/* if pointer set & left has a size more than
one and right is not in far space */
!isOperandInFarSpace (IC_RIGHT (ic)) &&
!OP_SYMBOL (IC_RESULT (ic))->remat &&
!IS_OP_RUONLY (IC_RIGHT (ic)) &&
- getSize (aggrToPtr (operandType (IC_RESULT (ic)), FALSE)) > 1)
-
- packRegsForOneuse (ic, IC_RESULT (ic), ebp);
+ getSize (aggrToPtr (operandType (IC_RESULT (ic)), FALSE)) > 1) {
+
+ packRegsDPTRuse (ic, IC_RESULT (ic), ebp);
+ }
/* if pointer get */
if (POINTER_GET (ic) &&
!isOperandInFarSpace (IC_RESULT (ic)) &&
!OP_SYMBOL (IC_LEFT (ic))->remat &&
!IS_OP_RUONLY (IC_RESULT (ic)) &&
- getSize (aggrToPtr (operandType (IC_LEFT (ic)), FALSE)) > 1)
-
- packRegsForOneuse (ic, IC_LEFT (ic), ebp);
+ getSize (aggrToPtr (operandType (IC_LEFT (ic)), FALSE)) > 1) {
+ packRegsDPTRuse (ic, IC_LEFT (ic), ebp);
+ }
/* if this is cast for intergral promotion then
check if only use of the definition of the
SPEC_USIGN (fromType) == SPEC_USIGN (toType))
{
- iCode *dic = packRegsForOneuse (ic, IC_RIGHT (ic), ebp);
+ iCode *dic = packRegsDPTRuse (ic, IC_RIGHT (ic), ebp);
if (dic)
{
if (IS_ARITHMETIC_OP (dic))
{
+ bitVectUnSetBit(OP_SYMBOL(IC_RESULT(dic))->defs,dic->key);
IC_RESULT (dic) = IC_RESULT (ic);
remiCodeFromeBBlock (ebp, ic);
+ bitVectUnSetBit(OP_SYMBOL(IC_RESULT(ic))->defs,ic->key);
hTabDeleteItem (&iCodehTab, ic->key, ic, DELETE_ITEM, NULL);
OP_DEFS (IC_RESULT (dic)) = bitVectSetBit (OP_DEFS (IC_RESULT (dic)), dic->key);
ic = ic->prev;
if (compareType (operandType (IC_RIGHT (ic)),
operandType (IC_LEFT (ic))) == 1)
{
- iCode *dic = packRegsForOneuse (ic, IC_RIGHT (ic), ebp);
+ iCode *dic = packRegsDPTRuse (ic, IC_RIGHT (ic), ebp);
if (dic)
{
+ bitVectUnSetBit(OP_SYMBOL(IC_RESULT(ic))->defs,ic->key);
IC_RESULT (dic) = IC_RESULT (ic);
remiCodeFromeBBlock (ebp, ic);
+ bitVectUnSetBit(OP_SYMBOL(IC_RESULT(ic))->defs,ic->key);
hTabDeleteItem (&iCodehTab, ic->key, ic, DELETE_ITEM, NULL);
OP_DEFS (IC_RESULT (dic)) = bitVectSetBit (OP_DEFS (IC_RESULT (dic)), dic->key);
ic = ic->prev;
if ((IS_ARITHMETIC_OP (ic)
|| IS_CONDITIONAL(ic)
|| IS_BITWISE_OP (ic)
- || ic->op == LEFT_OP || ic->op == RIGHT_OP
+ || ic->op == LEFT_OP || ic->op == RIGHT_OP || ic->op == CALL
|| (ic->op == ADDRESS_OF && isOperandOnStack (IC_LEFT (ic)))
) &&
IS_ITEMP (IC_RESULT (ic)) &&
getSize (operandType (IC_RESULT (ic))) <= 2)
packRegsForAccUse (ic);
-
+
}
}
iCode *ic;
int i;
- setToNull ((void *) &_G.funcrUsed);
+ setToNull ((void *) &_G.funcrUsed);
+ setToNull ((void *) &_G.regAssigned);
+ setToNull ((void *) &_G.totRegAssigned);
+ setToNull ((void *) &_G.funcrUsed);
ds390_ptrRegReq = _G.stackExtend = _G.dataExtend = 0;
- ds390_nRegs = 8;
+ ds390_nRegs = 18;
if (options.model != MODEL_FLAT24) options.stack10bit = 0;
/* change assignments this will remove some
live ranges reducing some register pressure */
/* and serially allocate registers */
serialRegAssign (ebbs, count);
+ ds390_nRegs = 8;
+ freeAllRegs ();
+ fillGaps();
+ ds390_nRegs = 18;
+
/* if stack was extended then tell the user */
if (_G.stackExtend)
{
/* redo that offsets for stacked automatic variables */
redoStackOffsets ();
- if (options.dump_rassgn)
+ if (options.dump_rassgn) {
dumpEbbsToFileExt (DUMP_RASSGN, ebbs, count);
+ dumpLiveRanges (DUMP_LRANGE, liveRanges);
+ }
/* do the overlaysegment stuff SDCCmem.c */
doOverlays (ebbs, count);
setToNull ((void **) &_G.stackSpil);
setToNull ((void **) &_G.spiltSet);
/* mark all registers as free */
+ ds390_nRegs = 8;
freeAllRegs ();
return;
projects / fw / sdcc / blobdiff