#include "common.h"
#include "newalloc.h"
+
/*-----------------------------------------------------------------*/
/* newCseDef - new cseDef */
/*-----------------------------------------------------------------*/
void ReplaceOpWithCheaperOp(operand **op, operand *cop) {
#ifdef RANGEHUNT
- printf ("ReplaceOpWithCheaperOp %s with %s: ",
- IS_SYMOP((*op)) ? OP_SYMBOL((*op))->name : "!SYM",
+ printf ("ReplaceOpWithCheaperOp %s with %s: ",
+ IS_SYMOP((*op)) ? OP_SYMBOL((*op))->name : "!SYM",
IS_SYMOP(cop) ? OP_SYMBOL(cop)->name : "!SYM");
// if op is a register equivalent
if (IS_ITEMP(cop) && OP_SYMBOL((*op))->isreqv) {
/* replaceAllSymBySym - replaces all operands by operand in an */
/* instruction chain */
/*-----------------------------------------------------------------*/
-void
+void
replaceAllSymBySym (iCode * ic, operand * from, operand * to, bitVect ** ndpset)
{
iCode *lic;
IS_ITEMP (IC_RESULT (cdp->diCode)))
*opp = IC_RESULT (cdp->diCode);
- if ((*opp) &&
- (isOperandLiteral(*opp) || !checkSign ||
+ if ((*opp) &&
+ (isOperandLiteral(*opp) || !checkSign ||
(checkSign &&
IS_SPEC(operandType (cop)) && IS_SPEC(operandType (*opp)) &&
(SPEC_USIGN(operandType (cop))==SPEC_USIGN(operandType (*opp)) &&
*opp = operandFromOperand (*opp);
(*opp)->isaddr = cop->isaddr;
}
-
+
if (IS_SPEC(operandType (cop)) && IS_SPEC(operandType (*opp)) &&
SPEC_NOUN(operandType(cop)) != SPEC_NOUN(operandType(*opp)))
{
- // special case: we can make an unsigned char literal
+ // special case: we can make an unsigned char literal
// into an int literal with no cost.
if (isOperandLiteral(*opp)
&& SPEC_NOUN(operandType(*opp)) == V_CHAR
*opp = NULL;
return 0;
}
-
+
}
-
+
return 1;
}
/*-----------------------------------------------------------------*/
/* ifDefSymIs - if a definition is found in the set */
/*-----------------------------------------------------------------*/
-int
+int
ifDefSymIs (set * cseSet, operand * sym)
{
cseDef *loop;
/*-----------------------------------------------------------------*/
/* ifDiCodeIs - returns truw if diCode is same */
/*-----------------------------------------------------------------*/
-int
+int
ifDiCodeIs (set * cseSet, iCode * ic)
{
cseDef *loop;
{
ic->op = CAST;
IC_LEFT (ic)->type = TYPE;
+ IC_LEFT (ic)->isLiteral = 0;
setOperandType (IC_LEFT (ic), operandType (IC_RESULT (ic)));
}
return;
IC_RIGHT (ic) = IC_LEFT (ic);
IC_LEFT (ic) = op;
IC_LEFT (ic)->type = TYPE;
+ IC_LEFT (ic)->isLiteral = 0;
setOperandType (IC_LEFT (ic), operandType (IC_RESULT (ic)));
}
return;
if (ic->nosupdate)
return;
+#if 0
/* for the form true_symbol := iTempNN */
if (ASSIGN_ITEMP_TO_SYM (ic) &&
!SPIL_LOC (IC_RIGHT (ic))) {
}
}
+#endif
#if 0 /* this needs furthur investigation can save a lot of code */
if (ASSIGN_SYM_TO_ITEMP(ic) &&
isinSet (ebb->succList, eBBWithEntryLabel (ebbs, label, count)))
{
- remiCodeFromeBBlock (ebb, ic);
- computeControlFlow (ebbs, count, 1);
if (!options.lessPedantic) {
werror (W_CONTROL_FLOW, ic->filename, ic->lineno);
}
- return;
+ if (IS_OP_VOLATILE (IC_COND (ic)))
+ {
+ IC_RIGHT (ic) = IC_COND (ic);
+ IC_LEFT (ic) = NULL;
+ IC_RESULT (ic) = NULL;
+ ic->op = DUMMY_READ_VOLATILE;
+ }
+ else
+ {
+ remiCodeFromeBBlock (ebb, ic);
+ computeControlFlow (ebbs, count, 1);
+ return;
+ }
}
/* if it remains an IFX the update the use Set */
- OP_USES(IC_COND (ic))=bitVectSetBit (OP_USES (IC_COND (ic)), ic->key);
- setUsesDefs (IC_COND (ic), ebb->defSet, ebb->outDefs, &ebb->usesDefs);
+ if (ic->op == IFX)
+ {
+ OP_USES(IC_COND (ic))=bitVectSetBit (OP_USES (IC_COND (ic)), ic->key);
+ setUsesDefs (IC_COND (ic), ebb->defSet, ebb->outDefs, &ebb->usesDefs);
+ }
+ else if (ic->op == DUMMY_READ_VOLATILE)
+ {
+ OP_USES(IC_RIGHT (ic))=bitVectSetBit (OP_USES (IC_RIGHT (ic)), ic->key);
+ setUsesDefs (IC_RIGHT (ic), ebb->defSet, ebb->outDefs, &ebb->usesDefs);
+ }
return;
}
set *compItems = NULL;
cseDef *cdp;
operand *cop;
+ int changes;
/* easy return */
if (!*cseSet && !*pss)
return;
- /* first find all items computed from this operand .
+ addSet (&compItems, op);
+
+ /* Recursively find all items computed from this operand .
This done fairly simply go thru the list and find
- those that are computed by arthimetic with this
- op */
- for (cdp = setFirstItem (*cseSet); cdp; cdp = setNextItem (*cseSet))
+ those that are computed by arthimetic with these
+ ops */
+ /* Also check for those computed from our computed
+ list . This will take care of situations like
+ iTemp1 = iTemp0 + 8;
+ iTemp2 = iTemp1 + 8; */
+ do
{
- if (IS_ARITHMETIC_OP (cdp->diCode))
+ changes = 0;
+ for (cdp = setFirstItem (*cseSet); cdp; cdp = setNextItem (*cseSet))
{
- if (isOperandEqual (IC_LEFT (cdp->diCode), op) ||
- isOperandEqual (IC_RIGHT (cdp->diCode), op))
- {
- /* save it in our list of items */
- addSet (&compItems, IC_RESULT (cdp->diCode));
- }
- /* also check for those computed from our computed
- list . This will take care of situations like
- iTemp1 = iTemp0 + 8;
- iTemp2 = iTemp1 + 8; */
- if (isinSetWith (compItems, (void*)IC_LEFT (cdp->diCode),
- (insetwithFunc)isOperandEqual) ||
- isinSetWith (compItems, (void*)IC_RIGHT (cdp->diCode),
- (insetwithFunc)isOperandEqual))
+ if (IS_ARITHMETIC_OP (cdp->diCode) || POINTER_GET(cdp->diCode))
{
- addSet (&compItems, IC_RESULT (cdp->diCode));
+ if (isinSetWith (compItems, (void*)IC_LEFT (cdp->diCode),
+ (insetwithFunc)isOperandEqual) ||
+ isinSetWith (compItems, (void*)IC_RIGHT (cdp->diCode),
+ (insetwithFunc)isOperandEqual))
+ {
+ if (!isinSetWith (compItems, (void*)IC_RESULT (cdp->diCode),
+ (insetwithFunc)isOperandEqual))
+ {
+ addSet (&compItems, IC_RESULT (cdp->diCode));
+ changes++;
+ }
+ }
}
}
}
-
- /* now delete all pointer gets with this op */
- deleteItemIf (cseSet, ifPointerGet, op);
- deleteItemIf (pss, ifPointerSet, op);
-
- /* set the bit vector used by dataFlow computation later */
- ebb->ptrsSet = bitVectSetBit (ebb->ptrsSet, op->key);
+ while (changes);
+
/* now for the computed items */
for (cop = setFirstItem (compItems); cop; cop = setNextItem (compItems))
{
}
}
+#if 0
+static void
+dumpCseSet(set *cseSet)
+{
+ while (cseSet)
+ {
+ cseDef *item=cseSet->item;
+ printf("->");
+ printOperand (item->sym, NULL);
+ printf(" ");
+ piCode (item->diCode, NULL);
+ cseSet = cseSet->next;
+ }
+}
+#endif
+
/*-----------------------------------------------------------------*/
/* cseBBlock - common subexpression elimination for basic blocks */
/* this is the hackiest kludgiest routine in the whole */
cseSet = setFromSet (ebb->inExprs);
/* these will be computed by this routine */
- setToNull ((void **) &ebb->outDefs);
- setToNull ((void **) &ebb->defSet);
- setToNull ((void **) &ebb->usesDefs);
- setToNull ((void **) &ebb->ptrsSet);
- setToNull ((void **) &ebb->addrOf);
- setToNull ((void **) &ebb->ldefs);
+ setToNull ((void *) &ebb->outDefs);
+ setToNull ((void *) &ebb->defSet);
+ setToNull ((void *) &ebb->usesDefs);
+ setToNull ((void *) &ebb->ptrsSet);
+ setToNull ((void *) &ebb->addrOf);
+ setToNull ((void *) &ebb->ldefs);
ebb->outDefs = bitVectCopy (ebb->inDefs);
bitVectDefault = iCodeKey;
be done only for global arrays & pointers but at this
point we don't know if globals, so to be safe do all */
deleteItemIf (&cseSet, ifAnyGetPointer);
+
+ /* can't cache pointer set/get operations across a call */
+ deleteSet (&ptrSetSet);
}
/* for pcall & ipush we need to add to the useSet */
/* if jumptable then mark the usage */
if (ic->op == JUMPTABLE)
{
- OP_USES(IC_JTCOND (ic))=
- bitVectSetBit (OP_USES (IC_JTCOND (ic)), ic->key);
- setUsesDefs (IC_JTCOND (ic), ebb->defSet,
- ebb->outDefs, &ebb->usesDefs);
+ if (IS_SYMOP (IC_JTCOND (ic)))
+ {
+ OP_USES(IC_JTCOND (ic)) =
+ bitVectSetBit (OP_USES (IC_JTCOND (ic)), ic->key);
+ setUsesDefs (IC_JTCOND (ic), ebb->defSet,
+ ebb->outDefs, &ebb->usesDefs);
+ }
continue;
}
/* update the spill location for this */
updateSpillLocation (ic,0);
- if (POINTER_SET (ic) &&
+ if (POINTER_SET (ic) &&
!(IS_BITFIELD (OP_SYMBOL (IC_RESULT (ic))->etype)))
{
pdop = NULL;
change = 1;
}
}
-
+
/* if left or right changed then do algebraic */
if (!computeOnly && change)
{
if (pdic && compareType (operandType (IC_RESULT (pdic)),
operandType (IC_RESULT (ic))) != 1)
pdic = NULL;
- if (pdic && port->cseOk && (*port->cseOk)(ic,pdic) == 0)
+ if (pdic && port->cseOk && (*port->cseOk)(ic,pdic) == 0)
pdic = NULL;
}
/* Alternate code */
if (pdic && IS_ITEMP(IC_RESULT(ic))) {
if (POINTER_GET(ic) && bitVectBitValue(ebb->ptrsSet,IC_LEFT(ic)->key)) {
- /* Mmm, found an equivalent pointer get at a lower level.
- This could be a loop however with the same pointer set
+ /* Mmm, found an equivalent pointer get at a lower level.
+ This could be a loop however with the same pointer set
later on */
} else {
/* if previous definition found change this to an assignment */
IC_LEFT(ic) = NULL;
IC_RIGHT(ic) = operandFromOperand(IC_RESULT(pdic));
SET_ISADDR(IC_RESULT(ic),0);
- SET_ISADDR(IC_RIGHT (ic),0);
+ SET_ISADDR(IC_RIGHT (ic),0);
}
}
}
}
- setToNull ((void **) &ebb->outExprs);
+ setToNull ((void *) &ebb->outExprs);
ebb->outExprs = cseSet;
ebb->outDefs = bitVectUnion (ebb->outDefs, ebb->defSet);
ebb->ptrsSet = bitVectUnion (ebb->ptrsSet, ebb->inPtrsSet);
projects / fw / sdcc / blobdiff