From f38ee634230a7acf95d9a42a7867ceca11754576 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 15 Sep 2004 17:00:41 +0000
Subject: [PATCH] Make sure to update the list end when an element is removed
 from it.  This fixes a crash in LICM when processing povray.

llvm-svn: 16367
---
 llvm/include/llvm/Analysis/AliasSetTracker.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/llvm/include/llvm/Analysis/AliasSetTracker.h b/llvm/include/llvm/Analysis/AliasSetTracker.h
index 6a6f0168d265..fe3e60c62bbd 100644
--- a/llvm/include/llvm/Analysis/AliasSetTracker.h
+++ b/llvm/include/llvm/Analysis/AliasSetTracker.h
@@ -77,6 +77,10 @@ class AliasSet {
     void removeFromList() {
       if (NextInList) NextInList->second.PrevInList = PrevInList;
       *PrevInList = NextInList;
+      if (AS->PtrListEnd == &NextInList) {
+        AS->PtrListEnd = PrevInList;
+        assert(*AS->PtrListEnd == 0 && "List not terminated right!");
+      }
     }
   };
 
-- 
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