[Bug c++/91415] Invalid warning for C++17 sequencing of shift operator E1<<E2.

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91415

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Aug 27 12:37:30 2019
New Revision: 274952

URL: https://gcc.gnu.org/viewcvs?rev=274952&root=gcc&view=rev
Log:
        PR c++/91415
        * c-common.c (verify_tree): For LSHIFT_EXPR, RSHIFT_EXPR,
        COMPONENT_REF and ARRAY_REF in cxx_dialect >= cxx17 mode handle it
        like COMPOUND_EXPR rather than normal expression.

        * g++.dg/warn/sequence-pt-4.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/warn/sequence-pt-4.C
Modified:
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c-common.c
    trunk/gcc/testsuite/ChangeLog