PR c/88383 - ICE calling __builtin_has_attribute on a reference
PR c/89288 - ICE in tree_code_size, at tree.c:865
PR c/89798 - excessive vector_size silently accepted and truncated
PR c/89797 - ICE on a vector_size (1LU << 33) int variable

gcc/ChangeLog:

	PR c/89797
	* targhooks.c (default_vector_alignment): Avoid assuming
	argument fits in SHWI.
	* tree.h (TYPE_VECTOR_SUBPARTS): Avoid sign overflow in
	a shift expression.
	* doc/extend.texi (__builtin_has_attribute): Add a clarifying note.

gcc/c-family/ChangeLog:

	PR c/88383
	PR c/89288
	PR c/89798
	PR c/89797
	* c-attribs.c (type_valid_for_vector_size): Detect excessively
	large sizes.
	(validate_attribute): Handle DECLs and expressions.
	(has_attribute): Handle types referenced by expressions.
	Avoid considering array attributes in ARRAY_REF expressions .

gcc/cp/ChangeLog:

	PR c/88383
	PR c/89288
	* parser.c (cp_parser_has_attribute_expression): Handle assignment
	expressions.

gcc/testsuite/ChangeLog:

	PR c/88383
	PR c/89288
	PR c/89798
	PR c/89797
	* c-c++-common/attributes-1.c: Adjust.
	* c-c++-common/builtin-has-attribute-6.c: New test.
	* c-c++-common/builtin-has-attribute-7.c: New test.
	* c-c++-common/builtin-has-attribute-4.c: Adjust expectations.
	* c-c++-common/builtin-has-attribute-6.c: New test.
	* c-c++-common/pr71574.c: Adjust.
	* gcc.dg/pr25559.c: Adjust.
	* gcc.dg/attr-vector_size.c: New test.

From-SVN: r270326