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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2011-02-24 23:26:09 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2011-02-24 23:26:09 +0000 |
| commit | 9ae59e3444630419cebea753d65d88f897e586b9 (patch) | |
| tree | 936b2b6f154cecf059c2ac74cfbd0b68f6064c45 /lib/Transforms/Utils/SimplifyCFG.cpp | |
| parent | 107d366df762c18294dc00f5de916f62672353ff (diff) | |
SimplifyCFG: GEPs with just one non-constant index are also cheap.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126452 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Utils/SimplifyCFG.cpp')
| -rw-r--r-- | lib/Transforms/Utils/SimplifyCFG.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp index c6708857cb..3968d6e8d3 100644 --- a/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/lib/Transforms/Utils/SimplifyCFG.cpp @@ -247,11 +247,13 @@ static bool DominatesMergePoint(Value *V, BasicBlock *BB, if (PBB->getFirstNonPHIOrDbg() != I) return false; break; - case Instruction::GetElementPtr: - // GEPs are cheap if all indices are constant. - if (!cast<GetElementPtrInst>(I)->hasAllConstantIndices()) + case Instruction::GetElementPtr: { + // GEPs are cheap if all indices are constant or if there's only one index. + GetElementPtrInst *GEP = cast<GetElementPtrInst>(I); + if (!GEP->hasAllConstantIndices() && GEP->getNumIndices() > 1) return false; break; + } case Instruction::Add: case Instruction::Sub: case Instruction::And: |