On 03/12/2018 10:39 AM, Marc Glisse wrote:
On Mon, 12 Mar 2018, Martin Liška wrote:
This is fix for the PR that introduces a new target macro. Using the macro
one can say that a target has a fast mempcpy and thus it's preferred to be used
if possible.
Patch can bootstrap on ppc64le-redhat-linux and survives regression tests.
I also tested on x86_64-linux-gnu.
Ready to be installed?
Martin
gcc/ChangeLog:
2018-03-08 Martin Liska <mli...@suse.cz>
PR middle-end/81657
* builtins.c (expand_builtin_memory_copy_args): Add new
arguments.
* config/i386/i386.h (TARGET_HAS_FAST_MEMPCPY_ROUTINE):
New macro.
Shouldn't the macro be defined in a more specific case, for instance glibc on
x86? Or do all known libc on x86 happen to provide a fast mempcpy?
That's Marc a very good question. Do we already have a glibc-related target
macros/hooks?
If so, I would add this as one of these.
Thanks,
Martin
* defaults.h (TARGET_HAS_FAST_MEMPCPY_ROUTINE): Likewise.
* doc/tm.texi: Likewise.
* doc/tm.texi.in: Likewise.
* expr.c (compare_by_pieces): Add support for bail out.
(emit_block_move_hints): Likewise.
* expr.h (emit_block_move_hints): Add new arguments.
