[Bug c++/78949] incorrect "unused variable" warning with SSE2

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78949

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 30 07:53:35 2017
New Revision: 248637

URL: https://gcc.gnu.org/viewcvs?rev=248637&root=gcc&view=rev
Log:
        Backported from mainline
        2017-01-04  Jakub Jelinek  <jakub@redhat.com>

        PR c++/78949
        * typeck.c (cp_build_unary_op): Call mark_rvalue_use on arg if it has
        vector type.

        * c-c++-common/Wunused-var-16.c: New test.

Added:
    branches/gcc-5-branch/gcc/testsuite/c-c++-common/Wunused-var-16.c
Modified:
    branches/gcc-5-branch/gcc/cp/ChangeLog
    branches/gcc-5-branch/gcc/cp/typeck.c
    branches/gcc-5-branch/gcc/testsuite/ChangeLog