[Bug c++/87519] -Wsign-conversion -Wconversion explicit cast fails to silence warning

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87519

--- Comment #11 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Thu Aug  8 15:37:46 2019
New Revision: 274211

URL: https://gcc.gnu.org/viewcvs?rev=274211&root=gcc&view=rev
Log:
        PR c++/87519 - bogus warning with -Wsign-conversion.
        * typeck.c (cp_build_binary_op): Use same_type_p instead of comparing
        the types directly.

        * g++.dg/warn/Wsign-conversion-5.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/warn/Wsign-conversion-5.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/typeck.c
    trunk/gcc/testsuite/ChangeLog