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Fix register spilling optimization

This commit is contained in:
drmortalwombat 2021-10-24 22:27:08 +02:00
parent 480270f4c9
commit 1074c29092
1 changed files with 14 additions and 1 deletions
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15
oscar64/NativeCodeGenerator.cpp
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@ -7936,6 +7936,16 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(void)
mIns[i].mType = ASMIT_NOP;
progress = true;
}
else if (mIns[i].mType == ASMIT_ROR && mIns[i].mMode == ASMIM_IMPLIED && (mIns[i].mLive & (LIVE_CPU_REG_A | LIVE_CPU_REG_Z)) == 0)
{
mIns[i].mType = ASMIT_LSR;
progress = true;
}
else if (mIns[i].mType == ASMIT_ROL && mIns[i].mMode == ASMIM_IMPLIED && (mIns[i].mLive & (LIVE_CPU_REG_A | LIVE_CPU_REG_Z)) == 0)
{
mIns[i].mType = ASMIT_ASL;
progress = true;
}
int apos;
if (mIns[i].mMode == ASMIM_INDIRECT_Y && FindGlobalAddress(i, mIns[i].mAddress, apos))
@ -8910,6 +8920,7 @@ void NativeCodeProcedure::CompressTemporaries(void)
ResetVisited();
mEntryBlock->RemapZeroPage(remap);
printf("Resize temps %s : %d -> %d\n", mInterProc->mIdent->mString, mInterProc->mTempSize, tpos - BC_REG_TMP);
mInterProc->mTempSize = tpos - BC_REG_TMP;
}
}
@ -8979,6 +8990,8 @@ void NativeCodeProcedure::Compile(InterCodeProcedure* proc)
CompressTemporaries();
int frameSpace = tempSave;
tempSave = proc->mTempSize > 16 ? proc->mTempSize - 16 : 0;
if (!(mGenerator->mCompilerOptions & COPT_NATIVE))
@ -9042,7 +9055,7 @@ void NativeCodeProcedure::Compile(InterCodeProcedure* proc)
mEntryBlock->mIns.Push(NativeCodeInstruction(ASMIT_CLC, ASMIM_IMPLIED));
mEntryBlock->mIns.Push(NativeCodeInstruction(ASMIT_LDA, ASMIM_ZERO_PAGE, BC_REG_STACK));
mEntryBlock->mIns.Push(NativeCodeInstruction(ASMIT_ADC, ASMIM_IMMEDIATE, tempSave + 2));
mEntryBlock->mIns.Push(NativeCodeInstruction(ASMIT_ADC, ASMIM_IMMEDIATE, frameSpace + 2));
mEntryBlock->mIns.Push(NativeCodeInstruction(ASMIT_STA, ASMIM_ZERO_PAGE, BC_REG_LOCALS));
mEntryBlock->mIns.Push(NativeCodeInstruction(ASMIT_LDA, ASMIM_ZERO_PAGE, BC_REG_STACK + 1));
mEntryBlock->mIns.Push(NativeCodeInstruction(ASMIT_ADC, ASMIM_IMMEDIATE, 0));