r257222 - in /trunk/gcc: ChangeLog config/arc/a...

[claziss@gcc.gnu.org]

Author: claziss
Date: Wed Jan 31 10:01:34 2018
New Revision: 257222

URL: https://gcc.gnu.org/viewcvs?rev=257222&root=gcc&view=rev
Log:
[ARC] Add 'uncached' attribute.

The _Uncached type qualifier can be used to bypass the cache without
resorting to declaring variables as volatile.

gcc/
2018-01-31  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc-protos.h (arc_is_uncached_mem_p): Function proto.
	* config/arc/arc.c (arc_handle_uncached_attribute): New function.
	(arc_attribute_table): Add 'uncached' attribute.
	(arc_print_operand): Print '.di' flag for uncached memory
	accesses.
	(arc_in_small_data_p): Do not consider for small data the uncached
	types.
	(arc_is_uncached_mem_p): New function.
	* config/arc/predicates.md (compact_store_memory_operand): Check
	for uncached memory accesses.
	(nonvol_nonimm_operand): Likewise.
	* gcc/doc/extend.texi (ARC Type Attribute): New subsection.

gcc/testsuite
2018-01-31  Claudiu Zissulescu  <claziss@synopsys.com>

	* gcc.target/arc/uncached.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/arc/uncached.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/arc/arc-protos.h
    trunk/gcc/config/arc/arc.c
    trunk/gcc/config/arc/predicates.md
    trunk/gcc/doc/extend.texi
    trunk/gcc/testsuite/ChangeLog