[Bug target/66112] __builtin_mul_overflow for int16_t emits poor code

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed May 13 08:07:58 2015
New Revision: 223115

URL: https://gcc.gnu.org/viewcvs?rev=223115&root=gcc&view=rev
Log:
        PR target/66112
        * internal-fn.c (get_min_precision): Use UNSIGNED instead of
        SIGNED to get precision of non-negative value.

        * gcc.target/i386/pr66112-1.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr66112-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/internal-fn.c
    trunk/gcc/testsuite/ChangeLog