From dfdca1a14db80a508bfec8062d670a9ed9853cb1 Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Thu, 24 Feb 2011 23:26:09 +0000 Subject: SimplifyCFG: GEPs with just one non-constant index are also cheap. llvm-svn: 126452 --- llvm/lib/Transforms/Utils/SimplifyCFG.cpp | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'llvm/lib/Transforms/Utils') diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp index c6708857cb5..3968d6e8d3b 100644 --- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/llvm/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(I)->hasAllConstantIndices()) + case Instruction::GetElementPtr: { + // GEPs are cheap if all indices are constant or if there's only one index. + GetElementPtrInst *GEP = cast(I); + if (!GEP->hasAllConstantIndices() && GEP->getNumIndices() > 1) return false; break; + } case Instruction::Add: case Instruction::Sub: case Instruction::And: -- cgit v1.2.3