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| author | James Greenhalgh <james.greenhalgh@arm.com> | 2014-11-01 08:13:09 +0000 |
|---|---|---|
| committer | James Greenhalgh <jgreenhalgh@gcc.gnu.org> | 2014-11-01 08:13:09 +0000 |
| commit | 7cbed00872ff3e20e5183f0cb788cd0c86bdf168 (patch) | |
| tree | c478897b6815f2a9b6b21d0aca73130690f0b5fd /gcc/targhooks.c | |
| parent | 240decf782968d137494cc9850fad5b310192c38 (diff) | |
| download | gcc-7cbed00872ff3e20e5183f0cb788cd0c86bdf168.zip gcc-7cbed00872ff3e20e5183f0cb788cd0c86bdf168.tar.gz gcc-7cbed00872ff3e20e5183f0cb788cd0c86bdf168.tar.bz2 | |
[Patch 1/7] Hookize *_BY_PIECES_P
gcc/
* target.def (use_by_pieces_infrastructure_p): New.
* doc/tm.texi.in (MOVE_BY_PIECES_P): Describe that this macro
is deprecated.
(STORE_BY_PIECES_P): Likewise.
(CLEAR_BY_PIECES_P): Likewise.
(SET_BY_PIECES_P): Likewise.
(TARGET_MOVE_BY_PIECES_PROFITABLE_P): Add hook.
* doc/tm.texi: Regenerate.
* expr.c (MOVE_BY_PIECES_P): Rewrite in terms of
TARGET_USE_BY_PIECES_INFRASTRUCTURE_P.
(STORE_BY_PIECES_P): Likewise.
(CLEAR_BY_PIECES_P): Likewise.
(SET_BY_PIECES_P): Likewise.
(STORE_MAX_PIECES): Move to...
* defaults.h (STORE_MAX_PIECES): ...here.
* targhooks.c (get_move_ratio): New.
(default_use_by_pieces_infrastructure_p): Likewise.
* targhooks.h (default_use_by_pieces_infrastructure_p): New.
* target.h (by_pieces_operation): New.
From-SVN: r216996
Diffstat (limited to 'gcc/targhooks.c')
| -rw-r--r-- | gcc/targhooks.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/gcc/targhooks.c b/gcc/targhooks.c index e482991..eef3d45 100644 --- a/gcc/targhooks.c +++ b/gcc/targhooks.c @@ -1406,6 +1406,61 @@ default_register_move_cost (machine_mode mode ATTRIBUTE_UNUSED, #endif } +/* For hooks which use the MOVE_RATIO macro, this gives the legacy default + behaviour. SPEED_P is true if we are compiling for speed. */ + +static unsigned int +get_move_ratio (bool speed_p ATTRIBUTE_UNUSED) +{ + unsigned int move_ratio; +#ifdef MOVE_RATIO + move_ratio = (unsigned int) MOVE_RATIO (speed_p); +#else +#if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti) + move_ratio = 2; +#else /* No movmem patterns, pick a default. */ + move_ratio = ((speed_p) ? 15 : 3); +#endif +#endif + return move_ratio; +} + +/* Return TRUE if the move_by_pieces/set_by_pieces infrastructure should be + used; return FALSE if the movmem/setmem optab should be expanded, or + a call to memcpy emitted. */ + +bool +default_use_by_pieces_infrastructure_p (unsigned int size, + unsigned int alignment, + enum by_pieces_operation op, + bool speed_p) +{ + unsigned int max_size = 0; + unsigned int ratio = 0; + + switch (op) + { + case CLEAR_BY_PIECES: + max_size = STORE_MAX_PIECES; + ratio = CLEAR_RATIO (speed_p); + break; + case MOVE_BY_PIECES: + max_size = MOVE_MAX_PIECES; + ratio = get_move_ratio (speed_p); + break; + case SET_BY_PIECES: + max_size = STORE_MAX_PIECES; + ratio = SET_RATIO (speed_p); + break; + case STORE_BY_PIECES: + max_size = STORE_MAX_PIECES; + ratio = get_move_ratio (speed_p); + break; + } + + return move_by_pieces_ninsns (size, alignment, max_size + 1) < ratio; +} + bool default_profile_before_prologue (void) { |