[Bug target/79079] [6] Wrong code gen for __builtin_mul_overflow when TRULY_NOOP_TRUNCATION (32, 64) == false

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79079

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Feb 15 06:59:34 2017
New Revision: 245465

URL: https://gcc.gnu.org/viewcvs?rev=245465&root=gcc&view=rev
Log:
        Backported from mainline
        2017-01-17  Kito Cheng  <kito.ch...@gmail.com>
                    Kuan-Lin Chen  <kuanlinche...@gmail.com>

        PR target/79079
        * internal-fn.c (expand_mul_overflow): Use convert_modes instead of
        gen_lowpart.

Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/internal-fn.c