r269917 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Mon Mar 25 13:53:50 2019
New Revision: 269917

URL: https://gcc.gnu.org/viewcvs?rev=269917&root=gcc&view=rev
Log:
2019-03-25  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/89789
	* tree-ssa-sccvn.c (set_ssa_val_to): Do not allow lattice
	changes from non-undefined back to undefined.

	* gcc.dg/torture/pr89789.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr89789.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c