[Bug c++/83993] [7/8 Regression] ICE: constant not recomputed when ADDR_EXPR changed

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83993

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jan 31 20:45:41 2018
New Revision: 257264

URL: https://gcc.gnu.org/viewcvs?rev=257264&root=gcc&view=rev
Log:
        PR c++/83993
        * constexpr.c (diag_array_subscript): Emit different diagnostics
        if TYPE_DOMAIN (arraytype) is NULL.
        (cxx_eval_array_reference, cxx_eval_store_expression): For arrays
        with NULL TYPE_DOMAIN use size_zero_node as nelts.

        * g++.dg/init/pr83993-1.C: New test.
        * g++.dg/cpp0x/pr83993.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/pr83993.C
    trunk/gcc/testsuite/g++.dg/init/pr83993-1.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/constexpr.c
    trunk/gcc/testsuite/ChangeLog