[Bug c++/77553] [6/7 Regression] wrong code with post-increment operator in constexpr

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77553

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Sep 13 17:10:39 2016
New Revision: 240119

URL: https://gcc.gnu.org/viewcvs?rev=240119&root=gcc&view=rev
Log:
        PR c++/77553
        * constexpr.c (cxx_fold_pointer_plus_expression): New function.
        (cxx_eval_binary_expression): Use it for POINTER_PLUS_EXPR.
        (cxx_eval_pointer_plus_expression): Remove.
        (cxx_eval_constant_expression) <case POINTER_PLUS_EXPR>: Don't
        call cxx_eval_pointer_plus_expression.

        * g++.dg/cpp1y/constexpr-77553.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-77553.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/constexpr.c
    trunk/gcc/testsuite/ChangeLog