[Bug c++/89599] C-style function-pointer-to-void* cast is handled inconsistently

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89599

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Mar  8 07:43:58 2019
New Revision: 269482

URL: https://gcc.gnu.org/viewcvs?rev=269482&root=gcc&view=rev
Log:
        PR c++/89599
        * constexpr.c (potential_constant_expression_1): Reject
        REINTERPRET_CAST_P NOP_EXPRs.

        * g++.dg/ubsan/vptr-4.C: Adjust expected diagnostics.
        * g++.dg/parse/array-size2.C: Likewise.
        * g++.dg/cpp0x/constexpr-89599.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-89599.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/constexpr.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/parse/array-size2.C
    trunk/gcc/testsuite/g++.dg/ubsan/vptr-4.C