From 95c5d0fb0a4e1ec88edae43c2db464e0cc63c76e Mon Sep 17 00:00:00 2001
From: Duncan Sands <baldrick@free.fr>
Date: Wed, 18 Feb 2009 17:55:38 +0000
Subject: [PATCH] In theory the aliasee may have dead constant users here. 
 Since we only do the transform if there is one use, strip off any such users
 in the hope of making the transform fire more often.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64926 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/IPO/GlobalOpt.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp
index 0ac1e65891b..0a35fa93e43 100644
--- a/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/lib/Transforms/IPO/GlobalOpt.cpp
@@ -2383,6 +2383,7 @@ bool GlobalOpt::ResolveAliases(Module &M) {
 
     Constant *Aliasee = J->getAliasee();
     GlobalValue *Target = cast<GlobalValue>(Aliasee->stripPointerCasts());
+    Target->removeDeadConstantUsers();
     bool hasOneUse = Target->hasOneUse() && Aliasee->hasOneUse();
 
     // Make all users of the alias use the aliasee instead.