commit 924cffa8e7d3387f71cdddf2b9bdc69a800a66bf
author Marshall Clow <mclow@qualcomm.com> Fri Mar 22 02:13:55 2013 +0000
committer Marshall Clow <mclow@qualcomm.com> Fri Mar 22 02:13:55 2013 +0000
tree 5d05f02e62389d9ff2e4fd78b777e95e42296596
parent 48911372e3a874e6126334ed6a68c2f9c1d13524

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

llvm-svn: 177693
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 1c2c986796f1cd23ccdaf10ffe1a9e70c936b19c

include/regex

diff --git a/include/regex b/include/regex
index 1156a3e..d1afa54 100644
--- a/include/regex
+++ b/include/regex
@@ -764,7 +764,7 @@
 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 @@
 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