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Fix optimizing loop with subtract negative constant on counter

This commit is contained in:
drmortalwombat 2024-09-18 18:30:53 +02:00
parent 534a42d2fe
commit 8bd5ec76c3
1 changed files with 11 additions and 6 deletions
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15
oscar64/InterCode.cpp
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@ -7986,6 +7986,9 @@ void InterCodeBasicBlock::UpdateLocalIntegerRangeSetsForward(const GrowingVariab
vr.mMaxState = IntegerValueRange::S_UNBOUND;
else if (ins->mSrc[0].mIntConst < 0 && vr.mMinState == IntegerValueRange::S_WEAK)
vr.mMinState = IntegerValueRange::S_UNBOUND;
if (ins->mDst.mType == IT_INT8 && ins->mSrc[0].mIntConst >= 128 && vr.mMaxState != IntegerValueRange::S_BOUND)
vr.mMinState = IntegerValueRange::S_UNBOUND;
vr.mMaxValue += ins->mSrc[0].mIntConst;
vr.mMinValue += ins->mSrc[0].mIntConst;
}
@ -10635,7 +10638,6 @@ bool InterCodeBasicBlock::SimplifyIntegerNumeric(const GrowingInstructionPtrArra
mVisited = true;
for (int i = 0; i < mInstructions.Size(); i++)
{
InterInstruction* ins = mInstructions[i];
@ -10690,6 +10692,7 @@ bool InterCodeBasicBlock::SimplifyIntegerNumeric(const GrowingInstructionPtrArra
ins->mOperator = ains->mOperator;
ins->mSrc[0] = ains->mSrc[0];
ins->mSrc[0].mIntConst <<= nins->mSrc[0].mIntConst;
ins->mSrc[0].mType = IT_INT16;
ins->mSrc[1] = nins->mDst;
changed = true;
@ -15712,7 +15715,12 @@ void InterCodeBasicBlock::EliminateDoubleLoopCounter(void)
{
lc.mStart = lc.mInit->mConst.mIntConst;
if (lc.mInc->mSrc[0].mTemp < 0)
{
if (lc.mInc->mOperator == IA_SUB)
lc.mStep = -lc.mInc->mSrc[0].mIntConst;
else
lc.mStep = lc.mInc->mSrc[0].mIntConst;
}
else
lc.mStep = lc.mInc->mSrc[1].mIntConst;
lcs.Push(lc);
@ -15735,9 +15743,6 @@ void InterCodeBasicBlock::EliminateDoubleLoopCounter(void)
int64 end = lcs[k].mEnd;
int64 step = lcs[k].mStep;
if (lcs[k].mInc->mCode == IC_BINARY_OPERATOR && lcs[k].mInc->mOperator == IA_SUB)
step = -step;
if (step > 0 && end > start || step < 0 && end < start)
loop = (end - start) / step;
}
@ -22062,7 +22067,7 @@ void InterCodeProcedure::Close(void)
{
GrowingTypeArray tstack(IT_NONE);
CheckFunc = !strcmp(mIdent->mString, "main");
CheckFunc = !strcmp(mIdent->mString, "f");
CheckCase = false;
mEntryBlock = mBlocks[0];