From 395c1502a7e6380ec2210ee4be1fdb3128c10528 Mon Sep 17 00:00:00 2001 From: Jakub Staszak Date: Wed, 3 Oct 2012 23:59:47 +0000 Subject: Fix PR13967. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165187 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/Scalar/IndVarSimplify.cpp | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'lib/Transforms/Scalar/IndVarSimplify.cpp') diff --git a/lib/Transforms/Scalar/IndVarSimplify.cpp b/lib/Transforms/Scalar/IndVarSimplify.cpp index c933a178d7..23d0bb51b3 100644 --- a/lib/Transforms/Scalar/IndVarSimplify.cpp +++ b/lib/Transforms/Scalar/IndVarSimplify.cpp @@ -1262,7 +1262,10 @@ static bool needsLFTR(Loop *L, DominatorTree *DT) { return true; // Do LFTR if the exit condition's IV is *not* a simple counter. - Value *IncV = Phi->getIncomingValueForBlock(L->getLoopLatch()); + int Idx = Phi->getBasicBlockIndex(L->getLoopLatch()); + if (Idx < 0) + return true; + Value *IncV = Phi->getIncomingValue(Idx); return Phi != getLoopPhiForCounter(IncV, L, DT); } -- cgit v1.2.3