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| author | Matt Arsenault <Matthew.Arsenault@amd.com> | 2014-05-30 18:34:43 +0000 |
|---|---|---|
| committer | Matt Arsenault <Matthew.Arsenault@amd.com> | 2014-05-30 18:34:43 +0000 |
| commit | c4e0611d86a6501fd987af04170ddecfe56fa794 (patch) | |
| tree | 13b0430b165697c783021d777ce9a7f894c4a2e6 /lib | |
| parent | 731d23ed42db0f876f0c9b2a3985637ef4ec8384 (diff) | |
| download | llvm-c4e0611d86a6501fd987af04170ddecfe56fa794.tar.gz llvm-c4e0611d86a6501fd987af04170ddecfe56fa794.tar.bz2 llvm-c4e0611d86a6501fd987af04170ddecfe56fa794.tar.xz | |
Make bitcast, extractelement, and insertelement considered cheap for speculation.
This helps more branches into selects. On R600,
vectors are cheap and anything that helps
remove branches is very good.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209914 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Transforms/Utils/SimplifyCFG.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp index 150dbdd4ec..e155daf6fc 100644 --- a/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/lib/Transforms/Utils/SimplifyCFG.cpp @@ -227,6 +227,9 @@ static unsigned ComputeSpeculationCost(const User *I) { case Instruction::Trunc: case Instruction::ZExt: case Instruction::SExt: + case Instruction::BitCast: + case Instruction::ExtractElement: + case Instruction::InsertElement: return 1; // These are all cheap. case Instruction::Call: |