[Bug c++/84578] [6/7/8 Regression] ICE with flexible array member and constexpr

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84578

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri Mar  2 20:27:46 2018
New Revision: 258156

URL: https://gcc.gnu.org/viewcvs?rev=258156&root=gcc&view=rev
Log:
        PR c++/84578
        * constexpr.c (get_array_or_vector_nelts): New.
        (cxx_eval_array_reference): Use it.
        (cxx_eval_vec_init_1): Likewise.
        (cxx_eval_store_expression): Likewise.

        * g++.dg/ext/flexary29.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/ext/flexary29.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/constexpr.c
    trunk/gcc/testsuite/ChangeLog