r266633 - in /trunk/gcc: ChangeLog c-family/Cha...

[msebor@gcc.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