From 81d924d8045f61f3a6165de701f8ef6ec249ea31 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 30 Jun 2003 04:53:27 +0000
Subject: [PATCH] Do not delete the same graph multiple times when freeing
 memory if graphs are sharing

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6998 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Analysis/DataStructure/Local.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/lib/Analysis/DataStructure/Local.cpp b/lib/Analysis/DataStructure/Local.cpp
index ebac2690e70..27d5ce563aa 100644
--- a/lib/Analysis/DataStructure/Local.cpp
+++ b/lib/Analysis/DataStructure/Local.cpp
@@ -487,9 +487,12 @@ bool LocalDataStructures::run(Module &M) {
 // our memory... here...
 //
 void LocalDataStructures::releaseMemory() {
-  for (hash_map<const Function*, DSGraph*>::iterator I = DSInfo.begin(),
-         E = DSInfo.end(); I != E; ++I)
-    delete I->second;
+  for (hash_map<Function*, DSGraph*>::iterator I = DSInfo.begin(),
+         E = DSInfo.end(); I != E; ++I) {
+    I->second->getReturnNodes().erase(I->first);
+    if (I->second->getReturnNodes().empty())
+      delete I->second;
+  }
 
   // Empty map so next time memory is released, data structures are not
   // re-deleted.