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| author | Chris Lattner <sabre@nondot.org> | 2010-07-12 01:19:22 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-07-12 01:19:22 +0000 |
| commit | dfd3626b477a416040fc4c08d5db3bb85d3500d8 (patch) | |
| tree | 2a6744be2a9438878813ffb762cfabb302c84b8f /lib/VMCore/Instructions.cpp | |
| parent | 5a30a8574cbcd3b385b1e8681c6a5c45856efb38 (diff) | |
| download | external_llvm-dfd3626b477a416040fc4c08d5db3bb85d3500d8.tar.gz external_llvm-dfd3626b477a416040fc4c08d5db3bb85d3500d8.tar.bz2 external_llvm-dfd3626b477a416040fc4c08d5db3bb85d3500d8.zip | |
fix PR7311 by avoiding breaking casts when a bitcast from scalar->vector
is involved.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108117 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/VMCore/Instructions.cpp')
| -rw-r--r-- | lib/VMCore/Instructions.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/VMCore/Instructions.cpp b/lib/VMCore/Instructions.cpp index a32cb3c871..381b85faa4 100644 --- a/lib/VMCore/Instructions.cpp +++ b/lib/VMCore/Instructions.cpp @@ -2006,6 +2006,14 @@ unsigned CastInst::isEliminableCastPair( { 99,99,99,99,99,99,99,99,99,13,99,12 }, // IntToPtr | { 5, 5, 5, 6, 6, 5, 5, 6, 6,11, 5, 1 }, // BitCast -+ }; + + // If either of the casts are a bitcast from scalar to vector, disallow the + // merging. + if ((firstOp == Instruction::BitCast && + isa<VectorType>(SrcTy) != isa<VectorType>(MidTy)) || + (secondOp == Instruction::BitCast && + isa<VectorType>(MidTy) != isa<VectorType>(DstTy))) + return 0; // Disallowed int ElimCase = CastResults[firstOp-Instruction::CastOpsBegin] [secondOp-Instruction::CastOpsBegin]; |