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.
From-SVN: r257222
