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| author | Jush Lu <jush.msn@gmail.com> | 2011-03-09 19:39:16 +0800 |
|---|---|---|
| committer | Jush Lu <jush.msn@gmail.com> | 2011-03-09 19:39:16 +0800 |
| commit | b5530586d68bd25831a6796b5d3199cb0769a35c (patch) | |
| tree | fac4a03b53b6a64b0c00f433e4d8b3c9f2bc67cd /lib/Transforms/InstCombine/InstCombineVectorOps.cpp | |
| parent | b4e17c5bf4361bbdeced39aa071150d7fa9c3c10 (diff) | |
| parent | d01f50f42ce60207ed6d27fb1778e456d83be06c (diff) | |
| download | external_llvm-b5530586d68bd25831a6796b5d3199cb0769a35c.zip external_llvm-b5530586d68bd25831a6796b5d3199cb0769a35c.tar.gz external_llvm-b5530586d68bd25831a6796b5d3199cb0769a35c.tar.bz2 | |
Merge upstream r127116
Diffstat (limited to 'lib/Transforms/InstCombine/InstCombineVectorOps.cpp')
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineVectorOps.cpp | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineVectorOps.cpp b/lib/Transforms/InstCombine/InstCombineVectorOps.cpp index af072b9..5caa12d 100644 --- a/lib/Transforms/InstCombine/InstCombineVectorOps.cpp +++ b/lib/Transforms/InstCombine/InstCombineVectorOps.cpp @@ -160,7 +160,7 @@ Instruction *InstCombiner::visitExtractElementInst(ExtractElementInst &EI) { if (EI.getOperand(0)->hasOneUse() && VectorWidth != 1) { APInt UndefElts(VectorWidth, 0); APInt DemandedMask(VectorWidth, 0); - DemandedMask.set(IndexVal); + DemandedMask.setBit(IndexVal); if (Value *V = SimplifyDemandedVectorElts(EI.getOperand(0), DemandedMask, UndefElts)) { EI.setOperand(0, V); @@ -426,8 +426,11 @@ Instruction *InstCombiner::visitInsertElementInst(InsertElementInst &IE) { unsigned VWidth = cast<VectorType>(VecOp->getType())->getNumElements(); APInt UndefElts(VWidth, 0); APInt AllOnesEltMask(APInt::getAllOnesValue(VWidth)); - if (SimplifyDemandedVectorElts(&IE, AllOnesEltMask, UndefElts)) + if (Value *V = SimplifyDemandedVectorElts(&IE, AllOnesEltMask, UndefElts)) { + if (V != &IE) + return ReplaceInstUsesWith(IE, V); return &IE; + } return 0; } @@ -451,7 +454,9 @@ Instruction *InstCombiner::visitShuffleVectorInst(ShuffleVectorInst &SVI) { APInt UndefElts(VWidth, 0); APInt AllOnesEltMask(APInt::getAllOnesValue(VWidth)); - if (SimplifyDemandedVectorElts(&SVI, AllOnesEltMask, UndefElts)) { + if (Value *V = SimplifyDemandedVectorElts(&SVI, AllOnesEltMask, UndefElts)) { + if (V != &SVI) + return ReplaceInstUsesWith(SVI, V); LHS = SVI.getOperand(0); RHS = SVI.getOperand(1); MadeChange = true; |