* c-common.c (c_common_reswords) add the alignof keyword,

	with same RID as __alignof and __alignof__

From-SVN: r151097

gcc/ChangeLog

+2009-08-25 Ville Voutilainen <ville.voutilainen@gmail.com>
+
+	* c-common.c (c_common_reswords) add the alignof keyword,
+	with same RID as __alignof and __alignof__
+
 2009-08-25  Anatoly Sokolov  <aesok@post.ru>
 
 	* hooks.h (hook_bool_const_int_const_int_true): Declare.

gcc/c-common.c

@@ -619,6 +619,7 @@ const struct c_common_resword c_common_reswords[] =
   { "__typeof__",	RID_TYPEOF,	0 },
   { "__volatile",	RID_VOLATILE,	0 },
   { "__volatile__",	RID_VOLATILE,	0 },
+  { "alignof",		RID_ALIGNOF,	D_CXXONLY | D_CXX0X | D_CXXWARN },
   { "asm",		RID_ASM,	D_ASM },
   { "auto",		RID_AUTO,	0 },
   { "bool",		RID_BOOL,	D_CXXONLY | D_CXXWARN },

gcc/testsuite/ChangeLog

+2009-08-25 Ville Voutilainen <ville.voutilainen@gmail.com>
+
+	* g++.dg/cpp0x/alignof.C: New. Tests that the alignof
+	keyword works in the same manner as __alignof.
+
 2009-08-25  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	PR libfortran/34670

gcc/testsuite/g++.dg/cpp0x/alignof.C

+// { dg-options "-std=c++0x" }
+int main(void)
+{
+  static_assert(alignof(int) == __alignof(int), "alignof(int) does not equal __alignof(int)");
+}