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Fix datatflow tracking in shift optimization

This commit is contained in:
drmortalwombat 2021-10-25 21:53:55 +02:00
parent 1074c29092
commit 342634d5e4
1 changed files with 49 additions and 1 deletions
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50
oscar64/NativeCodeGenerator.cpp
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@ -7936,17 +7936,22 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(void)
mIns[i].mType = ASMIT_NOP;
progress = true;
}
#endif
#if 1
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;
}
#endif
#if 1
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;
}
#endif
#if 1
int apos;
if (mIns[i].mMode == ASMIM_INDIRECT_Y && FindGlobalAddress(i, mIns[i].mAddress, apos))
{
@ -8107,6 +8112,7 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(void)
{
mIns[i + 0].mType = mIns[i + 1].mType;
mIns[i + 0].mMode = ASMIM_IMPLIED;
mIns[i + 0].mLive |= LIVE_CPU_REG_A;
mIns[i + 1].mType = ASMIT_STA;
progress = true;
}
@ -8154,6 +8160,8 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(void)
{
mIns[i + 1].mType = mIns[i + 0].mType;
mIns[i + 1].mMode = ASMIM_IMPLIED;
mIns[i + 1].mLive |= LIVE_CPU_REG_A;
mIns[i + 0].mLive |= LIVE_CPU_REG_A;
mIns[i + 0].mType = ASMIT_LDA;
progress = true;
}
@ -8312,6 +8320,7 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(void)
mIns[i + 0] = mIns[i + 1];
mIns[i + 1] = mIns[i + 2];
mIns[i + 1].mMode = ASMIM_IMPLIED;
mIns[i + 1].mLive |= LIVE_CPU_REG_A;
mIns[i + 2].mType = ASMIT_STA;
mIns[i + 2].mLive |= mIns[i + 1].mLive & LIVE_CPU_REG_C;
progress = true;
@ -8325,6 +8334,7 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(void)
mIns[i + 2] = mIns[i + 1];
mIns[i + 1] = mIns[i + 0];
mIns[i + 0].mMode = ASMIM_IMPLIED;
mIns[i + 0].mLive |= LIVE_CPU_REG_A;
mIns[i + 1].mType = ASMIT_STA;
mIns[i + 2].mLive |= mIns[i + 1].mLive & LIVE_CPU_REG_C;
progress = true;
@ -8348,6 +8358,30 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(void)
{
mIns[i + 2].mType = ASMIT_NOP;
}
#if 1
else if (
mIns[i + 0].mType == ASMIT_ASL && mIns[i + 0].mMode == ASMIM_ZERO_PAGE &&
mIns[i + 1].mType == ASMIT_ASL && mIns[i + 1].mMode == ASMIM_ZERO_PAGE && mIns[i + 1].mAddress == mIns[i + 0].mAddress &&
mIns[i + 2].mType == ASMIT_ASL && mIns[i + 2].mMode == ASMIM_ZERO_PAGE && mIns[i + 2].mAddress == mIns[i + 0].mAddress &&
!(mIns[i + 2].mLive & LIVE_CPU_REG_A))
{
int addr = mIns[i + 0].mAddress;
mIns.Insert(i, NativeCodeInstruction(ASMIT_LDA, ASMIM_ZERO_PAGE, addr));
mIns.Insert(i + 4, NativeCodeInstruction(ASMIT_STA, ASMIM_ZERO_PAGE, addr));
mIns[i + 0].mLive = mIns[i + 1].mLive | LIVE_CPU_REG_A;
mIns[i + 1].mMode = ASMIM_IMPLIED;
mIns[i + 1].mLive |= LIVE_CPU_REG_A;
mIns[i + 2].mMode = ASMIM_IMPLIED;
mIns[i + 2].mLive |= LIVE_CPU_REG_A;
mIns[i + 3].mMode = ASMIM_IMPLIED;
mIns[i + 3].mLive |= LIVE_CPU_REG_A;
mIns[i + 4].mLive = mIns[i + 3].mLive;
progress = true;
}
#endif
#if 1
if (
mIns[i + 0].mType == ASMIT_LDY && mIns[i + 0].mMode == ASMIM_IMMEDIATE && mIns[i + 0].mAddress == 0 &&
@ -8447,6 +8481,20 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(void)
progress = true;
}
#if 1
else if (
mIns[i + 0].mType == ASMIT_STA && mIns[i + 0].mMode == ASMIM_ZERO_PAGE &&
mIns[i + 1].mType == ASMIT_LDY && mIns[i + 1].mMode == ASMIM_IMMEDIATE &&
mIns[i + 2].mType == ASMIT_LDA && mIns[i + 2].mMode == ASMIM_INDIRECT_Y &&
mIns[i + 3].mType == ASMIT_EOR && mIns[i + 3].mMode == ASMIM_ZERO_PAGE && mIns[i + 3].mAddress == mIns[i + 0].mAddress)
{
mIns[i + 2].mType = mIns[i + 3].mType;
mIns[i + 3].mType = ASMIT_NOP;
mIns[i + 3].mMode = ASMIM_IMPLIED;
progress = true;
}
#endif
#if 1
else if (
mIns[i + 0].mType == ASMIT_STA && mIns[i + 0].mMode == ASMIM_ZERO_PAGE &&