From 7094b7ae8f93f9b092dfbd0574c0961abadbd9f5 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 1 Feb 2003 06:54:31 +0000
Subject: [PATCH] Fix a bug where we would delete neccesary calls in bu pass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5465 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Analysis/DataStructure/DataStructure.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/Analysis/DataStructure/DataStructure.cpp b/lib/Analysis/DataStructure/DataStructure.cpp
index 2c9a75c9a85..bf7ec77f0ff 100644
--- a/lib/Analysis/DataStructure/DataStructure.cpp
+++ b/lib/Analysis/DataStructure/DataStructure.cpp
@@ -1058,7 +1058,8 @@ void DSGraph::removeDeadNodes(unsigned Flags) {
 
   std::vector<bool> AuxFCallsAlive(AuxFunctionCalls.size());
   for (unsigned i = 0, e = AuxFunctionCalls.size(); i != e; ++i)
-    if (CallSiteUsesAliveArgs(AuxFunctionCalls[i], Alive, Visited)) {
+    if (!(Flags & DSGraph::RemoveUnreachableGlobals) ||
+        CallSiteUsesAliveArgs(AuxFunctionCalls[i], Alive, Visited)) {
       AuxFunctionCalls[i].markReachableNodes(Alive);
       AuxFCallsAlive[i] = true;
     }