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Shortcut tiny jump detours after placement

This commit is contained in:
drmortalwombat 2025-05-29 13:38:00 +02:00
parent fc9a8f2a89
commit 880abea32e
2 changed files with 29 additions and 0 deletions
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28
oscar64/NativeCodeGenerator.cpp
View File

@ -54908,6 +54908,31 @@ void NativeCodeBasicBlock::BuildPlacement(ExpandingArray<NativeCodeBasicBlock*>&
} }
} }
void NativeCodeBasicBlock::OptimizePlacement(void)
{
if (!mFalseJump && mTrueJump && !mTrueJump->mFalseJump && mTrueJump->mTrueJump && mTrueJump->mTrueJump->mPlace == mPlace + 1 && mTrueJump->mCode.Size() <= 3)
{
for (int i = 0; i < mTrueJump->mRelocations.Size(); i++)
{
LinkerReference rl = mTrueJump->mRelocations[i];
rl.mOffset += mCode.Size();
if (rl.mFlags & LREF_INBLOCK)
{
rl.mRefOffset += mCode.Size();
rl.mFlags &= ~LREF_INBLOCK;
}
mRelocations.Push(rl);
}
for (int i = 0; i < mTrueJump->mCode.Size(); i++)
mCode.Push(mTrueJump->mCode[i]);
mTrueJump->mEntryBlocks.RemoveAll(this);
mTrueJump->mNumEntries--;
mTrueJump = mTrueJump->mTrueJump;
mTrueJump->mEntryBlocks.Push(this);
mTrueJump->mNumEntries++;
}
}
void NativeCodeBasicBlock::InitialOffset(int& total) void NativeCodeBasicBlock::InitialOffset(int& total)
{ {
mAsmFromJump = -1; mAsmFromJump = -1;
@ -56064,6 +56089,9 @@ void NativeCodeProcedure::Assemble(void)
mEntryBlock->BuildPlacement(placement); mEntryBlock->BuildPlacement(placement);
for (int i = 0; i < placement.Size(); i++)
placement[i]->OptimizePlacement();;
for (int i = 0; i < placement.Size(); i++) for (int i = 0; i < placement.Size(); i++)
placement[i]->InitialOffset(total); placement[i]->InitialOffset(total);

1
oscar64/NativeCodeGenerator.h
View File

@ -303,6 +303,7 @@ public:
int LeadsInto(NativeCodeBasicBlock* block, int dist); int LeadsInto(NativeCodeBasicBlock* block, int dist);
NativeCodeBasicBlock* PlaceSequence(ExpandingArray<NativeCodeBasicBlock*>& placement, NativeCodeBasicBlock* block); NativeCodeBasicBlock* PlaceSequence(ExpandingArray<NativeCodeBasicBlock*>& placement, NativeCodeBasicBlock* block);
void BuildPlacement(ExpandingArray<NativeCodeBasicBlock*>& placement); void BuildPlacement(ExpandingArray<NativeCodeBasicBlock*>& placement);
void OptimizePlacement(void);
void InitialOffset(int& total); void InitialOffset(int& total);
bool CalculateOffset(int& total, bool final); bool CalculateOffset(int& total, bool final);