[Bug c++/83993] [7 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 #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Mar  3 13:23:43 2018
New Revision: 258181

URL: https://gcc.gnu.org/viewcvs?rev=258181&root=gcc&view=rev
Log:
        Backported from mainline
        2018-01-31  Jason Merrill  <jason@redhat.com>
                    Jakub Jelinek  <jakub@redhat.com>

        PR c++/83993
        * constexpr.c (cxx_eval_outermost_constant_expr): Build NOP_EXPR
        around non-constant ADDR_EXPRs rather than clearing TREE_CONSTANT
        on ADDR_EXPR.

        * g++.dg/init/pr83993-2.C: New test.

Added:
    branches/gcc-7-branch/gcc/testsuite/g++.dg/init/pr83993-2.C
Modified:
    branches/gcc-7-branch/gcc/cp/ChangeLog
    branches/gcc-7-branch/gcc/cp/constexpr.c
    branches/gcc-7-branch/gcc/testsuite/ChangeLog