[Bug middle-end/86122] [8/9 Regression] ICE in useless_type_conversion_p, at gimple-expr.c:87

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86122

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jun 14 19:07:45 2018
New Revision: 261606

URL: https://gcc.gnu.org/viewcvs?rev=261606&root=gcc&view=rev
Log:
        PR middle-end/86122
        * match.pd ((A +- CST1) +- CST2): Punt if last resort
        unsigned_type_for returns NULL.

        * gcc.c-torture/compile/pr86122.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr86122.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog