[Bug tree-optimization/87266] [9 Regression] ICE: Segmentation fault (in useless_type_conversion_p, tree_nop_conversion_p, or is_gimple_reg_type)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87266

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Sep 12 12:14:27 2018
New Revision: 264237

URL: https://gcc.gnu.org/viewcvs?rev=264237&root=gcc&view=rev
Log:
2018-09-12  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/87266
        * tree-ssa-sccvn.c (do_rpo_vn): Always iterate to not yet
        visited blocks.

        * gcc.dg/torture/pr87266-1.c: New testcase.
        * gcc.dg/torture/pr87266-2.c: Likewise.
        * gcc.dg/torture/pr87266-3.c: Likewise.
        * gcc.dg/torture/pr87266-4.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr87266-1.c
    trunk/gcc/testsuite/gcc.dg/torture/pr87266-2.c
    trunk/gcc/testsuite/gcc.dg/torture/pr87266-3.c
    trunk/gcc/testsuite/gcc.dg/torture/pr87266-4.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c