r249638 - in /trunk/gcc: ChangeLog cfghooks.c t...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Mon Jun 26 07:19:37 2017
New Revision: 249638

URL: https://gcc.gnu.org/viewcvs?rev=249638&root=gcc&view=rev
Log:
2017-06-26  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/80928
	* cfghooks.c (duplicate_block): Do not copy BB_DUPLICATED flag.
	(copy_bbs): Set BB_DUPLICATED flag early.
	(execute_on_growing_pred): Do not execute for BB_DUPLICATED
	marked blocks.
	(execute_on_shrinking_pred): Likewise.
	* tree-ssa.c (ssa_redirect_edge): Do not look for PHI args in
	BB_DUPLICATED blocks.
	* tree-ssa-phionlycoprop.c (eliminate_degenerate_phis_1): Properly
	iterate over all PHIs considering removal of *gsi.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfghooks.c
    trunk/gcc/tree-ssa-phionlycprop.c
    trunk/gcc/tree-ssa.c