[Bug c++/80129] wrong code with ternary struct assignment to const

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80129

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May  5 21:42:51 2017
New Revision: 247688

URL: https://gcc.gnu.org/viewcvs?rev=247688&root=gcc&view=rev
Log:
        Backported from mainline
        2017-03-22  Jakub Jelinek  <jakub@redhat.com>

        PR c++/80129
        * gimplify.c (gimplify_modify_expr_rhs) <case COND_EXPR>: Clear
        TREE_READONLY on result if writing it more than once.

        * g++.dg/torture/pr80129.C: New test.

Added:
    branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr80129.C
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/gimplify.c
    branches/gcc-6-branch/gcc/testsuite/ChangeLog