[Bug c++/71372] [6/7 Regression] C++ FE drops TREE_THIS_VOLATILE in cp_fold on all tcc_reference trees

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71372

--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jun  2 16:36:04 2016
New Revision: 237041

URL: https://gcc.gnu.org/viewcvs?rev=237041&root=gcc&view=rev
Log:
        PR c++/71372
        * cp-gimplify.c (cp_fold): For INDIRECT_REF, if the folded expression
        is INDIRECT_REF or MEM_REF, copy over TREE_READONLY, TREE_SIDE_EFFECTS
        and TREE_THIS_VOLATILE flags.  For ARRAY_REF and ARRAY_RANGE_REF, copy
        over TREE_READONLY, TREE_SIDE_EFFECTS and TREE_THIS_VOLATILE flags
        to the newly built tree.

        * c-c++-common/pr71372.c: New test.

Added:
    trunk/gcc/testsuite/c-c++-common/pr71372.c
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/cp-gimplify.c
    trunk/gcc/testsuite/ChangeLog