vendor/llvm/llvm-release_39-r278877

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp
index 310c29275faf..99b12d4db0d0 100644
--- a/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/lib/Transforms/IPO/GlobalOpt.cpp
@@ -44,6 +44,7 @@
 #include "llvm/Transforms/Utils/CtorUtils.h"
 #include "llvm/Transforms/Utils/Evaluator.h"
 #include "llvm/Transforms/Utils/GlobalStatus.h"
+#include "llvm/Transforms/Utils/Local.h"
 #include <algorithm>
 using namespace llvm;
 
@@ -779,7 +780,8 @@ static void ConstantPropUsersOf(Value *V, const DataLayout &DL,
         // Instructions could multiply use V.
         while (UI != E && *UI == I)
           ++UI;
-        I->eraseFromParent();
+        if (isInstructionTriviallyDead(I, TLI))
+          I->eraseFromParent();
       }
 }