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Fix right + left shift optimization when shifting from long to int

This commit is contained in:
drmortalwombat 2023-01-13 15:41:21 +01:00
parent 7c11a5347c
commit fdb051bd2b
1 changed files with 43 additions and 34 deletions
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11
oscar64/InterCode.cpp
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@ -12180,13 +12180,15 @@ void InterCodeBasicBlock::PeepholeOptimization(const GrowingVariableArray& stati
{ {
int shift = mInstructions[i + 0]->mSrc[0].mIntConst; int shift = mInstructions[i + 0]->mSrc[0].mIntConst;
if (shift & 7)
{
int mshift = mInstructions[i + 1]->mSrc[0].mIntConst; int mshift = mInstructions[i + 1]->mSrc[0].mIntConst;
mInstructions[i + 0]->mOperator = IA_AND; mInstructions[i + 0]->mOperator = IA_AND;
mInstructions[i + 0]->mSrc[0].mType = IT_INT16; mInstructions[i + 0]->mSrc[0].mType = IT_INT16;
mInstructions[i + 0]->mSrc[0].mType = mInstructions[i + 1]->mSrc[0].mType; mInstructions[i + 0]->mSrc[0].mType = mInstructions[i + 1]->mSrc[0].mType;
switch (mInstructions[i + 0]->mSrc[0].mType) switch (mInstructions[i + 0]->mSrc[1].mType)
{ {
case IT_INT8: case IT_INT8:
mInstructions[i + 0]->mSrc[0].mIntConst = (0xffu >> shift) << shift; mInstructions[i + 0]->mSrc[0].mIntConst = (0xffu >> shift) << shift;
@ -12199,6 +12201,12 @@ void InterCodeBasicBlock::PeepholeOptimization(const GrowingVariableArray& stati
break; break;
} }
if (shift > mshift && mInstructions[i + 0]->mDst.mType > mInstructions[i + 1]->mSrc[1].mType)
{
mInstructions[i + 1]->mSrc[1].mType = mInstructions[i + 0]->mDst.mType;
mInstructions[i + 1]->mDst.mType = mInstructions[i + 0]->mDst.mType;
}
if (shift > mshift) if (shift > mshift)
{ {
mInstructions[i + 1]->mOperator = IA_SHR; mInstructions[i + 1]->mOperator = IA_SHR;
@ -12218,6 +12226,7 @@ void InterCodeBasicBlock::PeepholeOptimization(const GrowingVariableArray& stati
changed = true; changed = true;
} }
}
#endif #endif
#if 1 #if 1
else if ( else if (