r236993 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Wed Jun  1 14:05:22 2016
New Revision: 236993

URL: https://gcc.gnu.org/viewcvs?rev=236993&root=gcc&view=rev
Log:
2016-06-01  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/71366
	* tree-ssa-loop-ivcanon.c (edges_to_remove): New global.
	(unloop_loops): Move removing edges here ...
	(try_unroll_loop_completely): ... from here.
	(try_peel_loop): ... and here.
	(tree_unroll_loops_completely_1): Track parent loops via
	bitmap of header BBs.
	(tree_unroll_loops_completely): Adjust for that.

	* gcc.dg/torture/pr71366-1.c: New testcase.
	* gcc.dg/torture/pr71366-2.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr71366-1.c
    trunk/gcc/testsuite/gcc.dg/torture/pr71366-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-ivcanon.c