[Bug c++/79639] [6 Regression] ICE with -O and constexpr

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79639

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May  5 21:30:03 2017
New Revision: 247674

URL: https://gcc.gnu.org/viewcvs?rev=247674&root=gcc&view=rev
Log:
        Backported from mainline
        2017-02-21  Jakub Jelinek  <jakub@redhat.com>

        PR c++/79639
        * constexpr.c (cxx_eval_store_expression): If *valp is a PTRMEM_CST,
        call cplus_expand_constant on it first.

        * g++.dg/cpp1y/constexpr-79639.C: New test. 

Added:
    branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp1y/constexpr-79639.C
Modified:
    branches/gcc-6-branch/gcc/cp/ChangeLog
    branches/gcc-6-branch/gcc/cp/constexpr.c
    branches/gcc-6-branch/gcc/testsuite/ChangeLog