[Bug c++/92343] [[likely]]/[[unlikely]] prevent method from being a constant expression

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92343

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Nov  8 19:00:02 2019
New Revision: 277988

URL: https://gcc.gnu.org/viewcvs?rev=277988&root=gcc&view=rev
Log:
        Backported from mainline
        2019-11-05  Jakub Jelinek  <jakub@redhat.com>

        PR c++/92343
        * constexpr.c (potential_constant_expression_1): Return true rather
        than false for PREDICT_EXPR.

        * g++.dg/cpp2a/attr-likely6.C: New test.

Added:
    branches/gcc-9-branch/gcc/testsuite/g++.dg/cpp2a/attr-likely6.C
Modified:
    branches/gcc-9-branch/gcc/cp/ChangeLog
    branches/gcc-9-branch/gcc/cp/constexpr.c
    branches/gcc-9-branch/gcc/testsuite/ChangeLog