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/expr.c | |
| parent | 03105885b1502a971955908255c722df5be0dafd (diff) | |
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/expr.c')
| -rw-r--r-- | gcc/expr.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/expr.c b/gcc/expr.c index fa15b7eceae..c78bc74c0d9 100644 --- a/gcc/expr.c +++ b/gcc/expr.c @@ -1561,12 +1561,16 @@ emit_block_move_hints (rtx x, rtx y, rtx size, enum block_op_methods method, unsigned int expected_align, HOST_WIDE_INT expected_size, unsigned HOST_WIDE_INT min_size, unsigned HOST_WIDE_INT max_size, - unsigned HOST_WIDE_INT probable_max_size) + unsigned HOST_WIDE_INT probable_max_size, + bool bail_out_libcall, bool *is_move_done) { int may_use_call; rtx retval = 0; unsigned int align; + if (is_move_done) + *is_move_done = true; + gcc_assert (size); if (CONST_INT_P (size) && INTVAL (size) == 0) return 0; @@ -1628,6 +1632,13 @@ emit_block_move_hints (rtx x, rtx y, rtx size, enum block_op_methods method, && ADDR_SPACE_GENERIC_P (MEM_ADDR_SPACE (x)) && ADDR_SPACE_GENERIC_P (MEM_ADDR_SPACE (y))) { + if (bail_out_libcall) + { + if (is_move_done) + *is_move_done = false; + return retval; + } + if (may_use_call < 0) return pc_rtx; |