frederik
/
oscar64
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Some peephole optimization

This commit is contained in:
drmortalwombat 2024-04-23 20:54:48 +02:00
parent 87ca43e5b7
commit bb8c31bf32
1 changed files with 34 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
oscar64/NativeCodeGenerator.cpp
View File

@ -21346,7 +21346,7 @@ bool NativeCodeBasicBlock::PropagateSinglePath(void)
CheckLive();
#if 1
if (mTrueJump && mFalseJump && mTrueJump->mEntryProvidedRegs.Size() && mFalseJump->mEntryRequiredRegs.Size())
if (mTrueJump && mFalseJump && mTrueJump->mEntryRequiredRegs.Size() && mFalseJump->mEntryRequiredRegs.Size())
{
mTempRegs.Reset(mTrueJump->mEntryRequiredRegs.Size());
@ -21413,7 +21413,22 @@ bool NativeCodeBasicBlock::PropagateSinglePath(void)
}
int sz = mIns.Size();
if (sz > 1 && mIns[sz - 1].mType == ASMIT_ASL && mIns[sz - 1].mMode == ASMIM_IMPLIED && (mBranch == ASMIT_BCC || mBranch == ASMIT_BCS) && !mExitRequiredRegs[CPU_REG_C] && mIns[sz - 2].ChangesAccuAndFlag())
if (sz > 1 && mIns[sz - 1].mType == ASMIT_LDA && mIns[sz - 2].IsShiftOrInc() && mIns[sz - 1].SameEffectiveAddress(mIns[sz - 2]))
{
mIns[sz - 2].mLive |= mIns[sz - 1].mLive & LIVE_CPU_REG_Z;
if (mIns[sz - 1].mMode == ASMIM_ZERO_PAGE)
mExitRequiredRegs += mIns[sz - 1].mAddress;
if (mTrueJump->mEntryRequiredRegs[CPU_REG_A])
mTrueJump->PrependInstruction(mIns[sz - 1]);
else
mFalseJump->PrependInstruction(mIns[sz - 1]);
mIns.Remove(sz - 1);
changed = true;
}
else if (sz > 1 && mIns[sz - 1].mType == ASMIT_ASL && mIns[sz - 1].mMode == ASMIM_IMPLIED && (mBranch == ASMIT_BCC || mBranch == ASMIT_BCS) && !mExitRequiredRegs[CPU_REG_C] && mIns[sz - 2].ChangesAccuAndFlag())
{
if (mBranch == ASMIT_BCC)
mBranch = ASMIT_BPL;
@ -36499,7 +36514,7 @@ bool NativeCodeBasicBlock::OptimizeSingleEntryLoopInvariant(NativeCodeProcedure*
if (mEntryBlocks.Size() == 2)
{
if (!tail->mExitRequiredRegs[CPU_REG_X] && !mEntryRequiredRegs[CPU_REG_X])
if (tail->mExitRequiredRegs.Size() && !tail->mExitRequiredRegs[CPU_REG_X] && !mEntryRequiredRegs[CPU_REG_X])
{
int ei = tail->mIns.Size() - 1;
while (ei >= 0 && !tail->mIns[ei].ReferencesXReg())
@ -43910,6 +43925,21 @@ bool NativeCodeBasicBlock::PeepHoleOptimizer(NativeCodeProcedure* proc, int pass
mIns[i + 3].mType = ASMIT_NOP; mIns[i + 3].mMode = ASMIM_IMPLIED;
progress = true;
}
else if (
mIns[i + 0].ChangesAccuAndFlag() &&
(mIns[i + 1].mType == ASMIT_LDY || mIns[i + 1].mType == ASMIT_LDX) &&
mIns[i + 2].mType == ASMIT_STA &&
mIns[i + 3].mType == ASMIT_ORA && mIns[i + 3].mMode == ASMIM_IMMEDIATE && mIns[i + 3].mAddress == 0)
{
NativeCodeInstruction ins(mIns[i + 1]);
mIns.Remove(i + 1);
mIns.Insert(i, ins);
mIns[i + 0].mLive |= LIVE_CPU_REG_A | LIVE_CPU_REG_C | LIVE_CPU_REG_X | LIVE_CPU_REG_Y;
mIns[i + 1].mLive |= mIns[i + 3].mLive | mIns[i + 0].mLive;
mIns[i + 2].mLive |= mIns[i + 3].mLive;
mIns[i + 3].mType = ASMIT_NOP; mIns[i + 3].mMode = ASMIM_IMPLIED;
progress = true;
}
else if (
mIns[i + 0].mType == ASMIT_STX && mIns[i + 0].mMode == ASMIM_ZERO_PAGE &&
mIns[i + 1].mType == ASMIT_STA && mIns[i + 1].mMode == ASMIM_ZERO_PAGE && mIns[i + 1].mAddress != mIns[i + 0].mAddress &&
@ -47275,7 +47305,7 @@ void NativeCodeProcedure::Compile(InterCodeProcedure* proc)
{
mInterProc = proc;
CheckFunc = !strcmp(mInterProc->mIdent->mString, "main");
CheckFunc = !strcmp(mInterProc->mIdent->mString, "rirq_build");
int nblocks = proc->mBlocks.Size();
tblocks = new NativeCodeBasicBlock * [nblocks];