[Bug tree-optimization/81227] [8 Regression] ICE in get_single_symbol, at tree-vrp.c:799

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81227

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jun 28 14:24:00 2017
New Revision: 249742

URL: https://gcc.gnu.org/viewcvs?rev=249742&root=gcc&view=rev
Log:
2017-06-28  Richard Biener  <rguent...@suse.de>

        PR middle-end/81227
        * fold-const.c (negate_expr_p): Use TYPE_UNSIGNED, not
        TYPE_OVERFLOW_WRAPS.
        * match.pd (negate_expr_p): Likewise.
        * tree-ssa-reassoc.c (optimize_range_tests_diff): Use
        fold_build2, not fold_binary.

        * gcc.dg/pr81227.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/pr81227.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-reassoc.c