[Bug middle-end/71874] [4.9 Regression] memmove works wrong

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71874

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Jul 19 17:30:05 2016
New Revision: 238484

URL: https://gcc.gnu.org/viewcvs?rev=238484&root=gcc&view=rev
Log:
        PR middle-end/71874
        * gimple-fold.c (fold_builtin_memory_op): Use
        get_addr_base_and_unit_offset instead of get_ref_base_and_extent.

        * g++.dg/torture/pr71874.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr71874.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-fold.c
    trunk/gcc/testsuite/ChangeLog