6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-10-25 10:27:04 +00:00
Code Issues Projects Releases Wiki Activity

This removes TODO added in http://reviews.llvm.org/D3658

Browse Source 
The patch transforms

ABS(NABS(X)) -> ABS(X)
NABS(ABS(X)) -> NABS(X)

Differential Revision: http://reviews.llvm.org/D4040



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210782 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dinesh Dwivedi
2014-06-12 14:06:00 +00:00
parent 7554a4abd2
commit 7edfaf7148
2 changed files with 489 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
lib/Transforms/InstCombine/InstCombineSelect.cpp
View File

@@ -733,8 +733,15 @@ Instruction *InstCombiner::FoldSPFofSPF(Instruction *Inner,
return ReplaceInstUsesWith(Outer, Inner);
}
// TODO: ABS(NABS(X)) -> ABS(X)
// TODO: NABS(ABS(X)) -> NABS(X)
// ABS(NABS(X)) -> ABS(X)
// NABS(ABS(X)) -> NABS(X)
if ((SPF1 == SPF_ABS && SPF2 == SPF_NABS) ||
(SPF1 == SPF_NABS && SPF2 == SPF_ABS)) {
SelectInst *SI = cast<SelectInst>(Inner);
Value *NewSI = Builder->CreateSelect(
SI->getCondition(), SI->getFalseValue(), SI->getTrueValue());
return ReplaceInstUsesWith(Outer, NewSI);
}
return nullptr;
}