From: Chris Lattner <sabre@nondot.org>
Date: Wed, 15 Sep 2004 17:00:41 +0000 (+0000)
Subject: Make sure to update the list end when an element is removed from it.  This
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=7e0e9c635f5439426252bd1ccbfa90b878ba0ca6;p=oota-llvm.git

Make sure to update the list end when an element is removed from it.  This
fixes a crash in LICM when processing povray.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16367 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/Analysis/AliasSetTracker.h b/include/llvm/Analysis/AliasSetTracker.h
index 6a6f0168d26..fe3e60c62bb 100644
--- a/include/llvm/Analysis/AliasSetTracker.h
+++ b/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!");
+      }
     }
   };