[Bug tree-optimization/81403] [8 Regression] wrong code at -O3

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81403

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jul 18 07:35:40 2017
New Revision: 250297

URL: https://gcc.gnu.org/viewcvs?rev=250297&root=gcc&view=rev
Log:
2017-07-18  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/80620
        PR tree-optimization/81403
        * tree-ssa-pre.c (phi_translate_1): Clear range and points-to
        info when re-using a VN table entry.

        * gcc.dg/torture/pr80620.c: New testcase.
        * gcc.dg/torture/pr81403.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr80620.c
    trunk/gcc/testsuite/gcc.dg/torture/pr81403.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c