From 680ac4ff4e9434a694d3f72c44f3f2d063a7cb15 Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Tue, 4 Jan 2011 19:10:54 +0000
Subject: [PATCH] When removing a value from GVN's leaders list, don't drop the
 Next pointer in a corner case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122822 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/GVN.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp
index cf82ebc027f..c78c4c308cb 100644
--- a/lib/Transforms/Scalar/GVN.cpp
+++ b/lib/Transforms/Scalar/GVN.cpp
@@ -466,6 +466,7 @@ namespace {
           NumberTableEntry* Next = Curr->Next;
           Curr->Val = Next->Val;
           Curr->BB = Next->BB;
+          Curr->Next = Next->Next;
         }
       }
     }
@@ -1693,7 +1694,7 @@ bool GVN::processInstruction(Instruction *I,
     
     return false;
   }
-
+  
   uint32_t NextNum = VN.getNextUnusedValueNumber();
   unsigned Num = VN.lookup_or_add(I);