From 97c1876256570b45cc2c789755132d6e384173aa Mon Sep 17 00:00:00 2001
From: Manman Ren <mren@apple.com>
Date: Thu, 11 Oct 2012 22:28:34 +0000
Subject: PGO: create metadata for switch only if it has more than one targets.

When all cases of a switch statement are dead, the weights vector only has one
element, and we will get an ssertion failure when calling createBranchWeights.

llvm-svn: 165759
---
 llvm/lib/Transforms/Utils/SimplifyCFG.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'llvm/lib/Transforms')

diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
index af8d1128523..5f8953abc07 100644
--- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -695,7 +695,7 @@ SimplifyEqualityComparisonWithOnlyPredecessor(TerminatorInst *TI,
         SI->removeCase(i);
       }
     }
-    if (HasWeight)
+    if (HasWeight && Weights.size() >= 2)
       SI->setMetadata(LLVMContext::MD_prof,
                       MDBuilder(SI->getParent()->getContext()).
                       createBranchWeights(Weights));
-- 
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