r271125 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Mon May 13 11:37:21 2019
New Revision: 271125

URL: https://gcc.gnu.org/viewcvs?rev=271125&root=gcc&view=rev
Log:
2019-05-13  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/90402
	* tree-if-conv.c (tree_if_conversion): Value number only
	the loop body by making the latch an exit of the region
	as well.
	* tree-ssa-sccvn.c (process_bb): Add flag whether to skip
	processing PHIs.
	(do_rpo_vn): Deal with multiple edges into the entry block
	that are not backedges inside the region by skipping PHIs
	of the entry block.

	* gcc.dg/torture/pr90402-1.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr90402-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-if-conv.c
    trunk/gcc/tree-ssa-sccvn.c