[Patch 3/7 arc] Deprecate *_BY_PIECES_P, move to hookized version

gcc/

	* config/arc/arc.c (TARGET_USE_BY_PIECES_INFRASTRUCTURE_P): New.
	(arc_use_by_pieces_infrastructure_p): Likewise.
	* confir/arc/arc.h (MOVE_BY_PIECES_P): Delete.
	(CAN_MOVE_BY_PIECES): Likewise.

From-SVN: r216999

gcc/ChangeLog

 2014-11-01  James Greenhalgh  <james.greenhalgh@arm.com>
 
+	* config/arc/arc.c (TARGET_USE_BY_PIECES_INFRASTRUCTURE_P): New.
+	(arc_use_by_pieces_infrastructure_p): Likewise.
+	* confir/arc/arc.h (MOVE_BY_PIECES_P): Delete.
+	(CAN_MOVE_BY_PIECES): Likewise.
+
+2014-11-01  James Greenhalgh  <james.greenhalgh@arm.com>
+
 	* config/s390/s390.c (s390_use_by_pieces_infrastructure_p): New.
 	(TARGET_USE_BY_PIECES_INFRASTRUCTURE_P): Likewise.
 	* config/s390/s390.h (MOVE_BY_PIECES_P): Remove.

gcc/config/arc/arc.c

@@ -415,6 +415,11 @@ static void output_short_suffix (FILE *file);
 
 static bool arc_frame_pointer_required (void);
 
+static bool arc_use_by_pieces_infrastructure_p (unsigned int,
+						unsigned int,
+						enum by_pieces_operation op,
+						bool);
+
 /* Implements target hook vector_mode_supported_p.  */
 
 static bool
@@ -530,6 +535,10 @@ static void arc_finalize_pic (void);
 #undef TARGET_DELEGITIMIZE_ADDRESS
 #define TARGET_DELEGITIMIZE_ADDRESS arc_delegitimize_address
 
+#undef TARGET_USE_BY_PIECES_INFRASTRUCTURE_P
+#define TARGET_USE_BY_PIECES_INFRASTRUCTURE_P \
+  arc_use_by_pieces_infrastructure_p
+
 /* Usually, we will be able to scale anchor offsets.
    When this fails, we want LEGITIMIZE_ADDRESS to kick in.  */
 #undef TARGET_MIN_ANCHOR_OFFSET
@@ -9383,6 +9392,21 @@ arc_legitimize_reload_address (rtx *p, machine_mode mode, int opnum,
   return false;
 }
 
+/* Implement TARGET_USE_BY_PIECES_INFRASTRUCTURE_P.  */
+
+static bool
+arc_use_by_pieces_infrastructure_p (unsigned int size,
+				    unsigned int align,
+				    enum by_pieces_operation op,
+				    bool speed_p)
+{
+  /* Let the movmem expander handle small block moves.  */
+  if (op == MOVE_BY_PIECES)
+    return false;
+
+  return default_use_by_pieces_infrastructure_p (size, align, op, speed_p);
+}
+
 struct gcc_target targetm = TARGET_INITIALIZER;
 
 #include "gt-arc.h"

gcc/config/arc/arc.h

@@ -1553,12 +1553,6 @@ extern int arc_return_address_regs[4];
    in one reasonably fast instruction.  */
 #define MOVE_MAX 4
 
-/* Let the movmem expander handle small block moves.  */
-#define MOVE_BY_PIECES_P(LEN, ALIGN)  0
-#define CAN_MOVE_BY_PIECES(SIZE, ALIGN) \
-  (move_by_pieces_ninsns (SIZE, ALIGN, MOVE_MAX_PIECES + 1) \
-   < (unsigned int) MOVE_RATIO (!optimize_size))
-
 /* Undo the effects of the movmem pattern presence on STORE_BY_PIECES_P .  */
 #define MOVE_RATIO(SPEED) ((SPEED) ? 15 : 3)