r216304 - in /trunk/gcc: ChangeLog cfghooks.c t...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Thu Oct 16 10:13:52 2014
New Revision: 216304

URL: https://gcc.gnu.org/viewcvs?rev=216304&root=gcc&view=rev
Log:
2014-10-16  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/63168
	* tree-cfg.c (gimple_can_merge_blocks_p): Only protect
	latches if after merging they are no longer simple.
	* cfghooks.c (merge_blocks): Handle merging a latch block
	into another block.

	* gcc.dg/tree-ssa/loop-40.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/loop-40.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfghooks.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-cfg.c