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| author | Pete Cooper <peter_cooper@apple.com> | 2012-07-26 22:37:04 +0000 |
|---|---|---|
| committer | Pete Cooper <peter_cooper@apple.com> | 2012-07-26 22:37:04 +0000 |
| commit | e807e45bffdb05eb982e183583bcff1f51d52b7b (patch) | |
| tree | 740bb2576828a27e6c4ceb918c942b0eab2799af /llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp | |
| parent | ecc928c89b119acb6a0e4ff0dd8624c22e120fd9 (diff) | |
| download | llvm-e807e45bffdb05eb982e183583bcff1f51d52b7b.zip llvm-e807e45bffdb05eb982e183583bcff1f51d52b7b.tar.gz llvm-e807e45bffdb05eb982e183583bcff1f51d52b7b.tar.bz2 | |
Teach SimplifyDemandedBits how to look through fpext and fptrunc to simplify their operand
llvm-svn: 160823
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp b/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp index 125c74a..46ba83b 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp @@ -1074,6 +1074,12 @@ Value *InstCombiner::SimplifyDemandedVectorElts(Value *V, APInt DemandedElts, // like undef&0. The result is known zero, not undef. UndefElts &= UndefElts2; break; + case Instruction::FPTrunc: + case Instruction::FPExt: + TmpV = SimplifyDemandedVectorElts(I->getOperand(0), DemandedElts, + UndefElts, Depth+1); + if (TmpV) { I->setOperand(0, TmpV); MadeChange = true; } + break; case Instruction::Call: { IntrinsicInst *II = dyn_cast<IntrinsicInst>(I); |