[Bug tree-optimization/87402] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3645

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87402

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Sep 25 12:51:57 2018
New Revision: 264566

URL: https://gcc.gnu.org/viewcvs?rev=264566&root=gcc&view=rev
Log:
2018-09-25  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/87402
        * tree-ssa-sccvn.c (SSA_VISITED): Remove unused function.
        (visit_phi): Re-instantiate handling of supposed to be VARYING
        but non-VARYING backedge value.

        * gcc.dg/torture/pr87402.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr87402.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c