[ModRefInfo] Initialize ArgMask to MRI_NoModRef.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@319831 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/AliasAnalysis.cpp b/lib/Analysis/AliasAnalysis.cpp
index 449d90f..97ea0fc 100644 (file)
--- a/lib/Analysis/AliasAnalysis.cpp
+++ b/lib/Analysis/AliasAnalysis.cpp
@@ -263,7 +263,7 @@ ModRefInfo AAResults::getModRefInfo(ImmutableCallSite CS1,
         // - If CS2 modifies location, dependence exists if CS1 reads or writes.
         // - If CS2 only reads location, dependence exists if CS1 writes.
         ModRefInfo ArgModRefCS2 = getArgModRefInfo(CS2, CS2ArgIdx);
-        ModRefInfo ArgMask;
+        ModRefInfo ArgMask = MRI_NoModRef;
         if (isModSet(ArgModRefCS2))
           ArgMask = MRI_ModRef;
         else if (isRefSet(ArgModRefCS2))