[Bug c/50459] alignof doesn't work on plain old constant, works with expressions containing it

["mpolacek at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50459

--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri May  9 08:24:37 2014
New Revision: 210262

URL: http://gcc.gnu.org/viewcvs?rev=210262&root=gcc&view=rev
Log:
    PR c/50459
c-family/
    * c-common.c (check_user_alignment): Return -1 if alignment is error
    node.
    (handle_aligned_attribute): Don't call default_conversion on
    FUNCTION_DECLs.
    (handle_vector_size_attribute): Likewise.
    (handle_tm_wrap_attribute): Handle case when wrap_decl is error node.
    (handle_sentinel_attribute): Call default_conversion and allow even
    integral types as an argument.
c/
    * c-parser.c (c_parser_attributes): Parse the arguments as an
    expression-list if the attribute takes identifier.
testsuite/
    * c-c++-common/attributes-1.c: Move test line to a new test.
    * c-c++-common/attributes-2.c: New test.
    * c-c++-common/pr50459.c: New test.
    * c-c++-common/pr59280.c: Add "undeclared" to dg-error.
    * gcc.dg/nonnull-2.c: Likewise.
    * gcc.dg/pr55570.c: Modify dg-error.
    * gcc.dg/tm/wrap-2.c: Likewise.

Added:
    trunk/gcc/testsuite/c-c++-common/attributes-2.c
    trunk/gcc/testsuite/c-c++-common/pr50459.c
Modified:
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c-common.c
    trunk/gcc/c/ChangeLog
    trunk/gcc/c/c-parser.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/c-c++-common/attributes-1.c
    trunk/gcc/testsuite/c-c++-common/pr59280.c
    trunk/gcc/testsuite/gcc.dg/nonnull-2.c
    trunk/gcc/testsuite/gcc.dg/pr55570.c
    trunk/gcc/testsuite/gcc.dg/tm/wrap-2.c