[ARC] Check if an input asm file is rf16 compliant
Check if an input asm file is rf16 compliant; if not, and the tag says
otherwise, fix the tag and emit a warning.
gas/
2017-09-20 Claudiu Zissulescu <claziss@synopsys.com>
* config/tc-arc.c (rf16_only): New static variable.
(autodetect_attributes): Check if we are rf16 compliant.
(arc_set_public_attributes): Fix and emit the warning is required.
* testsuite/gas/arc/attr-rf16.d: New file.
* testsuite/gas/arc/attr-rf16.err: Likewise.
* testsuite/gas/arc/attr-rf16.s: Likewise.