From 156999f8b9cee34f2c0fd516f8d3050060ad2c14 Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Fri, 28 Sep 2012 09:33:53 +0000
Subject: Surprisingly, we missed a trivial case here. Fix that!

llvm-svn: 164814
---
 llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp')

diff --git a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
index 70483ceb062..0ba7340e642 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
@@ -930,6 +930,10 @@ Instruction *InstCombiner::visitSelectInst(SelectInst &SI) {
       Value *V = Builder->CreateShuffleVector(TrueVal, FalseVal, MaskVal);
       return ReplaceInstUsesWith(SI, V);
     }
+
+    if (isa<ConstantAggregateZero>(CondVal)) {
+      return ReplaceInstUsesWith(SI, FalseVal);
+    }
   }
 
   return 0;
-- 
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