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Fix value propagation in loop dependency analysis

This commit is contained in:
drmortalwombat 2024-09-19 08:12:04 +02:00
parent dec7580d8d
commit ce0ac30280
2 changed files with 30 additions and 3 deletions
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31
oscar64/InterCode.cpp
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@ -109,6 +109,30 @@ void IntegerValueRange::LimitMinWeak(int64 value)
}
void IntegerValueRange::AddConstValue(InterType type, int64 value)
{
if (value > 0 && IntegerValueRange::S_WEAK)
mMaxState = S_UNBOUND;
else if (value < 0 && mMinState == S_WEAK)
mMinState = S_UNBOUND;
if (type == IT_INT8 && value >= 128 && mMaxState != S_BOUND)
mMinState = S_UNBOUND;
mMinValue += value;
mMaxValue += value;
if (type == IT_INT8)
{
if (mMinState == S_BOUND && mMinValue < -255 || mMaxState == S_BOUND && mMaxValue > 255)
{
LimitMax(255);
LimitMin(-128);
}
}
}
void IntegerValueRange::LimitMaxWeak(int64 value)
{
if (mMaxState == S_UNBOUND || mMaxState != S_UNKNOWN && mMaxValue > value)
@ -15187,6 +15211,7 @@ bool InterCodeBasicBlock::SingleTailLoopOptimization(const NumberSet& aliasedPar
ains->mSrc[0].mTemp = -1;
ains->mSrc[0].mIntConst = s;
tail->AppendBeforeBranch(ains);
ains->mDst.mRange.AddConstValue(ains->mDst.mType, s);
indexScale[ains->mDst.mTemp] = s;
@ -15219,7 +15244,7 @@ bool InterCodeBasicBlock::SingleTailLoopOptimization(const NumberSet& aliasedPar
ains->mSrc[0] = nins->mSrc[0];
ains->mSrc[0].mIntConst *= indexScale[lins->mSrc[0].mTemp];
tail->AppendBeforeBranch(ains);
ains->mDst.mRange.mMaxValue += ains->mSrc[0].mIntConst;
ains->mDst.mRange.AddConstValue(ains->mDst.mType, ains->mSrc[0].mIntConst);
indexScale[ains->mDst.mTemp] = (int)ains->mSrc[0].mIntConst;
@ -15254,7 +15279,7 @@ bool InterCodeBasicBlock::SingleTailLoopOptimization(const NumberSet& aliasedPar
ains->mSrc[0].mTemp = -1;
ains->mSrc[0].mIntConst = s;
tail->AppendBeforeBranch(ains);
ains->mDst.mRange.mMaxValue += ains->mSrc[0].mIntConst;
ains->mDst.mRange.AddConstValue(ains->mDst.mType, s);
indexScale[ains->mDst.mTemp] = s;
@ -22074,7 +22099,7 @@ void InterCodeProcedure::Close(void)
{
GrowingTypeArray tstack(IT_NONE);
CheckFunc = !strcmp(mIdent->mString, "bar2");
CheckFunc = !strcmp(mIdent->mString, "main");
CheckCase = false;
mEntryBlock = mBlocks[0];

2
oscar64/InterCode.h
View File

@ -185,6 +185,8 @@ public:
void LimitMinWeak(int64 value);
void LimitMaxWeak(int64 value);
void AddConstValue(InterType type, int64 value);
};