r255384 - in /trunk/gcc: ChangeLog combine.c

[segher@gcc.gnu.org]

Author: segher
Date: Mon Dec  4 15:38:20 2017
New Revision: 255384

URL: https://gcc.gnu.org/viewcvs?rev=255384&root=gcc&view=rev
Log:
combine: Remove use_crosses_set_p

This removes use_crosses_set_p, and uses modified_between_p instead
everywhere it was used.  This improves optimisation.


	* combine.c: Adjust comment.
	(use_crosses_set_p): Delete.
	(can_combine_p): Use modified_between_p instead of use_crosses_set_p.
	(try_combine): Ditto.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c