[Bug middle-end/70140] Inefficient expansion of __builtin_mempcpy

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70140

--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Aug  1 11:59:27 2017
New Revision: 250771

URL: https://gcc.gnu.org/viewcvs?rev=250771&root=gcc&view=rev
Log:
Make mempcpy more optimal (PR middle-end/70140).

2017-08-01  Martin Liska  <mli...@suse.cz>

        PR middle-end/70140
        * gcc.dg/string-opt-1.c: Adjust test-case to scan for memcpy.
2017-08-01  Martin Liska  <mli...@suse.cz>

        PR middle-end/70140
        * builtins.c (expand_builtin_memcpy_args): Remove.
        (expand_builtin_memcpy): Call newly added function
        expand_builtin_memory_copy_args.
        (expand_builtin_memcpy_with_bounds): Likewise.
        (expand_builtin_mempcpy): Remove last argument.
        (expand_builtin_mempcpy_with_bounds): Likewise.
        (expand_builtin_memory_copy_args): New function created from
        expand_builtin_mempcpy_args with small modifications.
        (expand_builtin_mempcpy_args): Remove.
        (expand_builtin_stpcpy): Remove unused argument.
        (expand_builtin): Likewise.
        (expand_builtin_with_bounds): Likewise.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/builtins.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/string-opt-1.c