[Bug testsuite/88208] new test case c-c++-common/builtin-has-attribute-3.c in r266335 has multiple excess errors

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88208

--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Nov 29 17:48:58 2018
New Revision: 266633

URL: https://gcc.gnu.org/viewcvs?rev=266633&root=gcc&view=rev
Log:
PR c/88172 - attribute aligned of zero silently accepted but ignored
PR testsuite/88208 - new test case c-c++-common/builtin-has-attribute-3.c in
r266335 has multiple excess errors

gcc/ChangeLog:

        PR c/88172
        PR testsuite/88208
        * doc/extend.texi (attribute constructor): Clarify.

gcc/c/ChangeLog:

        PR c/88172
        PR testsuite/88208
        * c-decl.c (declspec_add_alignas): Adjust call to check_user_alignment.

gcc/c-family/ChangeLog:

        PR c/88172
        PR testsuite/88208
        * c-attribs.c (common_handle_aligned_attribute): Silently avoid setting
        alignments to values less than the target requires.
        (has_attribute): For attribute aligned consider both the attribute
        and the alignment bits.
        * c-common.c (c_init_attributes): Optionally issue a warning for
        zero alignment.

gcc/testsuite/ChangeLog:

        PR c/88172
        PR testsuite/88208
        * gcc.dg/attr-aligned-2.c: New test.
        * gcc.dg/builtin-has-attribute.c: Adjust.
        * c-c++-common/builtin-has-attribute-2.c: Same.
        * c-c++-common/builtin-has-attribute-3.c: Same.
        * c-c++-common/builtin-has-attribute-4.c: Same.
        * c-c++-common/builtin-has-attribute-5.c: New test.
        * gcc.target/aarch64/attr-aligned.c: Same.
        * gcc.target/i386/attr-aligned.c: Same.
        * gcc.target/powerpc/attr-aligned.c: Same.
        * gcc.target/sparc/attr-aligned.c: Same.


Added:
    trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-5.c
    trunk/gcc/testsuite/gcc.dg/attr-aligned-2.c
    trunk/gcc/testsuite/gcc.target/aarch64/attr-aligned.c
    trunk/gcc/testsuite/gcc.target/i386/attr-aligned.c
    trunk/gcc/testsuite/gcc.target/powerpc/attr-aligned.c
    trunk/gcc/testsuite/gcc.target/sparc/attr-aligned.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c-attribs.c
    trunk/gcc/c-family/c-common.c
    trunk/gcc/c/ChangeLog
    trunk/gcc/c/c-decl.c
    trunk/gcc/doc/extend.texi
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-2.c
    trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-3.c
    trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-4.c
    trunk/gcc/testsuite/gcc.dg/builtin-has-attribute.c