From 07eac1e6984b7c5ded14f5a209e5fe5a39764d88 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 23 Mar 2005 22:06:41 +0000
Subject: [PATCH] Make this a bit more aggressive

llvm-svn: 20792
---
 llvm/lib/Analysis/AliasAnalysis.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Analysis/AliasAnalysis.cpp b/llvm/lib/Analysis/AliasAnalysis.cpp
index 43c86a5dc9e9..da54c1b3da1e 100644
--- a/llvm/lib/Analysis/AliasAnalysis.cpp
+++ b/llvm/lib/Analysis/AliasAnalysis.cpp
@@ -125,7 +125,7 @@ AliasAnalysis::getModRefInfo(CallSite CS, Value *P, unsigned Size) {
   // If P points to a constant memory location, the call definitely could not
   // modify the memory location.
   if ((Mask & Mod) && AA->pointsToConstantMemory(P))
-    Mask = Ref;
+    Mask = ModRefResult(Mask & ~Mod);
 
   return ModRefResult(Mask & AA->getModRefInfo(CS, P, Size));
 }