[Bug tree-optimization/87280] [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3647

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87280

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Sep 12 14:03:21 2018
New Revision: 264241

URL: https://gcc.gnu.org/viewcvs?rev=264241&root=gcc&view=rev
Log:
2018-09-12  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/87280
        * tree-ssa-sccvn.c (process_bb): Handle the case of executable
        edge but unreachable target.
        (do_rpo_vn): For conservatively handling a PHI only mark
        the backedge executable but not the block reachable.

        * gcc.dg/torture/pr87280.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr87280.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c