r243813 - in /trunk/gcc: ChangeLog config/rs600...

[acsawdey@gcc.gnu.org]

Author: acsawdey
Date: Mon Dec 19 21:32:16 2016
New Revision: 243813

URL: https://gcc.gnu.org/viewcvs?rev=243813&root=gcc&view=rev
Log:
	* config/rs6000/rs6000-protos.h (expand_strn_compare): Declare.
	* config/rs6000/rs6000.md (UNSPEC_CMPB): New unspec.
	(cmpb<mode>3): pattern for generating cmpb.
	(cmpstrnsi): pattern to expand strncmp ().
	* config/rs6000/rs6000.opt (mstring-compare-inline-limit): Add a new
	target option for controlling how much code inline expansion of
	strncmp() will be allowed to generate.
	* config/rs6000/rs6000.c (expand_strncmp_align_check): generate code
	for runtime page crossing check of strncmp () args.
	(expand_strn_compare): Function to do builtin expansion of strncmp ().


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000-protos.h
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/config/rs6000/rs6000.md
    trunk/gcc/config/rs6000/rs6000.opt