[Bug c/82437] [8 Regression] false-positive -Wtautological-compare warning with -std=gnu89

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82437

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Oct  6 07:11:25 2017
New Revision: 253476

URL: https://gcc.gnu.org/viewcvs?rev=253476&root=gcc&view=rev
Log:
        PR c/82437
        * c-warn.c (warn_tautological_bitwise_comparison): Instead of
        using to_widest use wide_int with the larger of the two precisions.

        * c-c++-common/Wtautological-compare-6.c: New test.

Added:
    trunk/gcc/testsuite/c-c++-common/Wtautological-compare-6.c
Modified:
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c-warn.c
    trunk/gcc/testsuite/ChangeLog