r190755 - Make __has_extension(c_thread_local) work.

[Ed Schouten]

Author: ed
Date: Sat Sep 14 11:17:20 2013
New Revision: 190755

URL: http://llvm.org/viewvc/llvm-project?rev=190755&view=rev
Log:
Make __has_extension(c_thread_local) work.

Unlike C++11's "thread_local" keyword, C11's "_Thread_local" is in the
reserved namespace, meaning we provide it unconditionally; it is marked
as KEYALL in TokenKinds.def.

This means that like all the other C11 keywords, we can expose its
presence through __has_extension().


Modified:
    cfe/trunk/docs/LanguageExtensions.rst
    cfe/trunk/lib/Lex/PPMacroExpansion.cpp

Modified: cfe/trunk/docs/LanguageExtensions.rst
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/LanguageExtensions.rst?rev=190755&r1=190754&r2=190755&view=diff
==============================================================================
--- cfe/trunk/docs/LanguageExtensions.rst (original)
+++ cfe/trunk/docs/LanguageExtensions.rst Sat Sep 14 11:17:20 2013
@@ -921,8 +921,8 @@ enabled.
 C11 ``_Thread_local``
 ^^^^^^^^^^^^^^^^^^^^^
 
-Use ``__has_feature(c_thread_local)`` to determine if support for
-``_Thread_local`` variables is enabled.
+Use ``__has_feature(c_thread_local)`` or ``__has_extension(c_thread_local)``
+to determine if support for ``_Thread_local`` variables is enabled.
 
 Checks for Type Traits
 ======================

Modified: cfe/trunk/lib/Lex/PPMacroExpansion.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Lex/PPMacroExpansion.cpp?rev=190755&r1=190754&r2=190755&view=diff
==============================================================================
--- cfe/trunk/lib/Lex/PPMacroExpansion.cpp (original)
+++ cfe/trunk/lib/Lex/PPMacroExpansion.cpp Sat Sep 14 11:17:20 2013
@@ -1045,6 +1045,7 @@ static bool HasExtension(const Preproces
            .Case("c_atomic", true)
            .Case("c_generic_selections", true)
            .Case("c_static_assert", true)
+           .Case("c_thread_local", PP.getTargetInfo().isTLSSupported())
            // C++11 features supported by other languages as extensions.
            .Case("cxx_atomic", LangOpts.CPlusPlus)
            .Case("cxx_deleted_functions", LangOpts.CPlusPlus)