[Bug middle-end/82875] [8 Regression] ICE at -Os on valid code on x86_64-linux-gnu: in find_widening_optab_handler_and_mode, at optabs-query.c:414

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82875

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 22 09:57:28 2017
New Revision: 255050

URL: https://gcc.gnu.org/viewcvs?rev=255050&root=gcc&view=rev
Log:
        PR middle-end/82875
        * optabs.c (expand_doubleword_mult, expand_binop): Before calling
        expand_binop with *mul_widen_optab, make sure at least one of the
        operands doesn't have VOIDmode.

        * gcc.dg/pr82875.c: New test.
        * gcc.c-torture/compile/pr82875.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr82875.c
    trunk/gcc/testsuite/gcc.dg/pr82875.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/optabs.c
    trunk/gcc/testsuite/ChangeLog