diff options
| author | Martin Liska <mliska@suse.cz> | 2019-05-20 09:55:00 +0200 |
|---|---|---|
| committer | Martin Liska <marxin@gcc.gnu.org> | 2019-05-20 07:55:00 +0000 |
| commit | db91c7cf3d97a169d4e1c463d87a9f2007c40761 (patch) | |
| tree | 11aa3bde6da1520b48d1a2a0cbf8e580e67e0c11 /gcc/config | |
| parent | 03105885b1502a971955908255c722df5be0dafd (diff) | |
| download | gcc-db91c7cf3d97a169d4e1c463d87a9f2007c40761.zip gcc-db91c7cf3d97a169d4e1c463d87a9f2007c40761.tar.gz gcc-db91c7cf3d97a169d4e1c463d87a9f2007c40761.tar.bz2 | |
Come up with hook libc_has_fast_function (PR middle-end/90263).
2019-05-20 Martin Liska <mliska@suse.cz>
PR middle-end/90263
* builtins.c (expand_builtin_memory_copy_args): When having a
target with fast mempcpy implementation do now use memcpy.
* config/i386/i386.c (ix86_libc_has_fast_function): New.
(TARGET_LIBC_HAS_FAST_FUNCTION): Likewise.
* doc/tm.texi: Likewise.
* doc/tm.texi.in: Likewise.
* target.def:
* expr.c (emit_block_move_hints): Add 2 new arguments.
* expr.h (emit_block_move_hints): Bail out when libcall
to memcpy would be used.
2019-05-20 Martin Liska <mliska@suse.cz>
PR middle-end/90263
* gcc.c-torture/compile/pr90263.c: New test.
* lib/target-supports.exp: Add check_effective_target_glibc.
From-SVN: r271400
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/i386/i386.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index d3eb7c8..384c633 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -23063,6 +23063,21 @@ ix86_run_selftests (void) #define TARGET_GET_MULTILIB_ABI_NAME \ ix86_get_multilib_abi_name +static bool ix86_libc_has_fast_function (int fcode) +{ +#ifdef OPTION_GLIBC + if (OPTION_GLIBC) + return (built_in_function)fcode == BUILT_IN_MEMPCPY; + else + return false; +#else + return false; +#endif +} + +#undef TARGET_LIBC_HAS_FAST_FUNCTION +#define TARGET_LIBC_HAS_FAST_FUNCTION ix86_libc_has_fast_function + #if CHECKING_P #undef TARGET_RUN_TARGET_SELFTESTS #define TARGET_RUN_TARGET_SELFTESTS selftest::ix86_run_selftests |