From 04bd79b23a6ba24271510202edf10bf7753eb378 Mon Sep 17 00:00:00 2001
From: Marshall Clow <mclow@qualcomm.com>
Date: Fri, 22 Mar 2013 02:13:55 +0000
Subject: [PATCH] Fix undefined behavior in syntax_option_type::operator~ and
 match_flag_type::operator./a.out  Found by UBSan

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@177693 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/regex | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/regex b/include/regex
index 1156a3e5..d1afa54a 100644
--- a/include/regex
+++ b/include/regex
@@ -764,7 +764,7 @@ _LIBCPP_CONSTEXPR
 syntax_option_type
 operator~(syntax_option_type __x)
 {
-    return syntax_option_type(~int(__x));
+    return syntax_option_type(~int(__x) & 0x1FF);
 }
 
 inline _LIBCPP_INLINE_VISIBILITY
@@ -840,7 +840,7 @@ _LIBCPP_CONSTEXPR
 match_flag_type
 operator~(match_flag_type __x)
 {
-    return match_flag_type(~int(__x));
+    return match_flag_type(~int(__x) & 0x0FFF);
 }
 
 inline _LIBCPP_INLINE_VISIBILITY