From: Douglas Gregor <dgregor@apple.com>
Date: Wed, 12 Nov 2008 21:52:20 +0000 (+0000)
Subject: Slightly improve type hash
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b995d799e146a7d43a3e8311adb54653415434a1;p=clang

Slightly improve type hash

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59173 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/AST/TypeOrdering.h b/include/clang/AST/TypeOrdering.h
index a23ca75ff0..cd8bd75240 100644
--- a/include/clang/AST/TypeOrdering.h
+++ b/include/clang/AST/TypeOrdering.h
@@ -42,7 +42,8 @@ namespace llvm {
     }
 
     static unsigned getHashValue(clang::QualType Val) {
-      return (unsigned)Val.getAsOpaquePtr();
+      return (unsigned)Val.getAsOpaquePtr() ^
+             ((unsigned)Val.getAsOpaquePtr() >> 9);
     }
 
     static bool isEqual(clang::QualType LHS, clang::QualType RHS) {