[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

1 files changed, 8 insertions, 15 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index 9b81e62..ef85177 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -171,32 +171,32 @@ static void write_complex_part (rtx, rtx, bool);
    to perform a structure copy.  */
 #ifndef MOVE_BY_PIECES_P
 #define MOVE_BY_PIECES_P(SIZE, ALIGN) \
-  (move_by_pieces_ninsns (SIZE, ALIGN, MOVE_MAX_PIECES + 1) \
-   < (unsigned int) MOVE_RATIO (optimize_insn_for_speed_p ()))
+  (targetm.use_by_pieces_infrastructure_p (SIZE, ALIGN, MOVE_BY_PIECES, \
+					   optimize_insn_for_speed_p ()))
 #endif
 
 /* This macro is used to determine whether clear_by_pieces should be
    called to clear storage.  */
 #ifndef CLEAR_BY_PIECES_P
 #define CLEAR_BY_PIECES_P(SIZE, ALIGN) \
-  (move_by_pieces_ninsns (SIZE, ALIGN, STORE_MAX_PIECES + 1) \
-   < (unsigned int) CLEAR_RATIO (optimize_insn_for_speed_p ()))
+  (targetm.use_by_pieces_infrastructure_p (SIZE, ALIGN, CLEAR_BY_PIECES, \
+					   optimize_insn_for_speed_p ()))
 #endif
 
 /* This macro is used to determine whether store_by_pieces should be
    called to "memset" storage with byte values other than zero.  */
 #ifndef SET_BY_PIECES_P
 #define SET_BY_PIECES_P(SIZE, ALIGN) \
-  (move_by_pieces_ninsns (SIZE, ALIGN, STORE_MAX_PIECES + 1) \
-   < (unsigned int) SET_RATIO (optimize_insn_for_speed_p ()))
+  (targetm.use_by_pieces_infrastructure_p (SIZE, ALIGN, SET_BY_PIECES, \
+					   optimize_insn_for_speed_p ()))
 #endif
 
 /* This macro is used to determine whether store_by_pieces should be
    called to "memcpy" storage when the source is a constant string.  */
 #ifndef STORE_BY_PIECES_P
 #define STORE_BY_PIECES_P(SIZE, ALIGN) \
-  (move_by_pieces_ninsns (SIZE, ALIGN, STORE_MAX_PIECES + 1) \
-   < (unsigned int) MOVE_RATIO (optimize_insn_for_speed_p ()))
+  (targetm.use_by_pieces_infrastructure_p (SIZE, ALIGN, STORE_BY_PIECES, \
+					   optimize_insn_for_speed_p ()))
 #endif
 
 /* This is run to set up which modes can be used
@@ -827,13 +827,6 @@ widest_int_mode_for_size (unsigned int size)
   return mode;
 }
 
-/* STORE_MAX_PIECES is the number of bytes at a time that we can
-   store efficiently.  Due to internal GCC limitations, this is
-   MOVE_MAX_PIECES limited by the number of bytes GCC can represent
-   for an immediate constant.  */
-
-#define STORE_MAX_PIECES  MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT))
-
 /* Determine whether the LEN bytes can be moved by using several move
    instructions.  Return nonzero if a call to move_by_pieces should
    succeed.  */