commit 4a2b23e189cacb3c7afbfe3c38690768a01390ef
author Chris Lattner <sabre@nondot.org> Mon Oct 11 04:07:27 2004 +0000
committer Chris Lattner <sabre@nondot.org> Mon Oct 11 04:07:27 2004 +0000
tree c8f774534595b855120e81a6e338ec334ebefa70
parent f8d1097e9d69c65642d008926065317db583961a

Fix SingleSource/Benchmarks/McGill/chomp


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16912 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/ScalarEvolution.cpp

diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 6a2bc71..31c8517 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -1898,6 +1898,7 @@
     //
     // Get the initial value for the loop.
     SCEVHandle Start = getSCEVAtScope(AddRec->getStart(), L->getParentLoop());
+    if (isa<SCEVCouldNotCompute>(Start)) return UnknownValue;
     SCEVHandle Step = AddRec->getOperand(1);
 
     Step = getSCEVAtScope(Step, L->getParentLoop());