r266560 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Wed Nov 28 13:51:42 2018
New Revision: 266560

URL: https://gcc.gnu.org/viewcvs?rev=266560&root=gcc&view=rev
Log:
2018-11-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/88223
	* tree-ssa-sccvn.c (vn_reference_lookup_3): When skipping
	over a stored-same value may-alias store make sure to consider
	partial overlaps which are valid when TBAA reasonings do not
	apply and byte-granular overlaps are possible at all.

	* gcc.dg/torture/pr88223.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr88223.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c