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Remove superfluous CPX/CPY with #0

This commit is contained in:
drmortalwombat 2024-07-06 15:08:03 +02:00
parent 470462fe8b
commit fcc2cbbebe
1 changed files with 15 additions and 0 deletions
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15
oscar64/NativeCodeGenerator.cpp
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@ -42908,6 +42908,21 @@ bool NativeCodeBasicBlock::PeepHoleOptimizerIterate2(int i, int pass)
return true;
}
}
else if ((mIns[i + 0].mType == ASMIT_LDX || mIns[i + 0].mType == ASMIT_TAX || mIns[i + 0].mType == ASMIT_INX || mIns[i + 0].mType == ASMIT_DEX) &&
mIns[i + 1].mType == ASMIT_CPX && mIns[i + 1].mMode == ASMIM_IMMEDIATE && mIns[i + 1].mAddress == 0 && !(mIns[i + 1].mLive & LIVE_CPU_REG_C))
{
mIns[i + 0].mLive |= LIVE_CPU_REG_Z;
mIns[i + 1].mType = ASMIT_NOP; mIns[i + 1].mMode = ASMIM_IMPLIED;
return true;
}
else if ((mIns[i + 0].mType == ASMIT_LDY || mIns[i + 0].mType == ASMIT_TAY || mIns[i + 0].mType == ASMIT_INY || mIns[i + 0].mType == ASMIT_DEY) &&
mIns[i + 1].mType == ASMIT_CPY && mIns[i + 1].mMode == ASMIM_IMMEDIATE && mIns[i + 1].mAddress == 0 && !(mIns[i + 1].mLive & LIVE_CPU_REG_C))
{
mIns[i + 0].mLive |= LIVE_CPU_REG_Z;
mIns[i + 1].mType = ASMIT_NOP; mIns[i + 1].mMode = ASMIM_IMPLIED;
return true;
}
#if 0
else if (
mIns[i + 0].mType == ASMIT_LDA && mIns[i + 0].mMode == ASMIM_IMMEDIATE &&