From e8ce626308eb047d226847660e7dceed1169038f Mon Sep 17 00:00:00 2001
From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Thu, 20 Dec 2012 03:59:24 +0000
Subject: [PATCH] Don't leave IsUnsigned uninitialized in a default-constructed
 APSInt. Copying such a structure has undefined behavior. Caught by
 -fsanitize=bool.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170652 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/ADT/APSInt.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/llvm/ADT/APSInt.h b/include/llvm/ADT/APSInt.h
index 048c65ce2c7..4a5e7a3918e 100644
--- a/include/llvm/ADT/APSInt.h
+++ b/include/llvm/ADT/APSInt.h
@@ -23,7 +23,7 @@ class APSInt : public APInt {
   bool IsUnsigned;
 public:
   /// Default constructor that creates an uninitialized APInt.
-  explicit APSInt() {}
+  explicit APSInt() : IsUnsigned(false) {}
 
   /// APSInt ctor - Create an APSInt with the specified width, default to
   /// unsigned.