[Bug c++/87567] constexpr evaluation rejects call to non-constexpr function

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87567

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Oct 10 21:11:18 2018
New Revision: 265027

URL: https://gcc.gnu.org/viewcvs?rev=265027&root=gcc&view=rev
Log:
        PR c++/87567 - constexpr rejects call to non-constexpr function.
        * constexpr.c (potential_constant_expression_1) <case FOR_STMT>: Return
        true if the condition is always false.
        <case WHILE_STMT>: Likewise.

        * g++.dg/cpp1y/constexpr-loop7.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-loop7.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/constexpr.c
    trunk/gcc/testsuite/ChangeLog