From: Marshall Clow <mclow@qualcomm.com>
Date: Fri, 22 Mar 2013 02:13:55 +0000 (+0000)
Subject: Fix undefined behavior in syntax_option_type::operator~ and match_flag_type::operator... 
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1c2c986796f1cd23ccdaf10ffe1a9e70c936b19c;p=platform%2Fupstream%2Fllvm.git

Fix undefined behavior in syntax_option_type::operator~ and match_flag_type::operator./a.out  Found by UBSan

llvm-svn: 177693
---

diff --git a/libcxx/include/regex b/libcxx/include/regex
index 1156a3e..d1afa54 100644
--- a/libcxx/include/regex
+++ b/libcxx/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