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Some peephole optimizing for native compiler

This commit is contained in:
drmortalwombat 2021-11-08 20:18:40 +01:00
parent a65d65d3d1
commit 7dddcc772b
1 changed files with 30 additions and 0 deletions
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30
oscar64/NativeCodeGenerator.cpp
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@ -10016,6 +10016,21 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(int pass)
mIns[i + 0].mType = ASMIT_SEC;
progress = true;
}
else if (
mIns[i + 0].mType == ASMIT_CLC &&
mIns[i + 1].mType == ASMIT_TYA &&
mIns[i + 2].mType == ASMIT_ADC && mIns[i + 2].mMode == ASMIM_IMMEDIATE && mIns[i + 2].mAddress <= 2 && !(mIns[i + 2].mLive & (LIVE_CPU_REG_C | LIVE_CPU_REG_Y)))
{
int t = mIns[i + 2].mAddress;
mIns[i + 0].mType = ASMIT_INY;
if (t > 1)
mIns[i + 1].mType = ASMIT_INY;
else
mIns[i + 1].mType = ASMIT_NOP;
mIns[i + 1].mLive |= LIVE_CPU_REG_Y;
mIns[i + 2].mType = ASMIT_TYA; mIns[i + 2].mMode = ASMIM_IMPLIED;
progress = true;
}
#if 1
else if (
@ -10211,6 +10226,21 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(int pass)
mIns[i + 3].mType = ASMIT_ROL;
progress = true;
}
else if (
mIns[i + 0].mType == ASMIT_LDA &&
mIns[i + 1].mType == ASMIT_STA && mIns[i + 1].mMode == ASMIM_ZERO_PAGE &&
mIns[i + 3].mMode == ASMIM_ZERO_PAGE && mIns[i + 1].mAddress && mIns[i + 3].mAddress &&
mIns[i + 2].mMode == ASMIM_IMPLIED && !(mIns[i + 3].mLive & LIVE_MEM) &&
(mIns[i + 2].mType == ASMIT_ASL || mIns[i + 2].mType == ASMIT_LSR || mIns[i + 2].mType == ASMIT_ROL || mIns[i + 2].mType == ASMIT_ROR) &&
(mIns[i + 3].mType == ASMIT_ORA || mIns[i + 3].mType == ASMIT_AND || mIns[i + 3].mType == ASMIT_EOR || mIns[i + 3].mType == ASMIT_ADC || mIns[i + 3].mType == ASMIT_SBC))
{
mIns[i + 1].mType = ASMIT_NOP;
mIns[i + 3].mMode = mIns[i + 0].mMode;
mIns[i + 3].mAddress= mIns[i + 0].mAddress;
mIns[i + 3].mLinkerObject = mIns[i + 0].mLinkerObject;
mIns[i + 3].mFlags = mIns[i + 0].mFlags;
progress = true;
}
#if 0
if (
mIns[i + 0].mType == ASMIT_LDY && mIns[i + 0].mMode == ASMIM_IMMEDIATE && mIns[i + 0].mAddress == 0 &&