[19/27] Use target structures for init_ira_costs

[Richard Sandiford <rdsandiford at googlemail dot com>]

The only non-mechanical change here is that some functions passed
the global variable op_costs around as a like-named parameter,
which doesn't work now that op_costs is a macro.  There doesn't
seem any need to pass it around, so I just made the functions
use the global version instead.

Richard


gcc/
	* ira-int.h (target_ira_int): Add x_max_struct_costs_size, x_init_cost,
	x_temp_costs, x_op_costs, x_this_op_costs and x_cost_classes.
	* ira-costs.c (max_struct_costs_size, init_cost, temp_costs, op_costs)
	(this_op_costs, costs_classes): Redefine as macros.
	(record_reg_classes): Don't take op_costs as a parameter.
	(record_operand_costs): Likewise.  Update calls to record_reg_classes.
	(scan_one_insn): Update call to record_operand_costs.

Index: gcc/ira-int.h
===================================================================
--- gcc/ira-int.h	2010-07-04 11:27:49.000000000 +0100
+++ gcc/ira-int.h	2010-07-04 11:56:23.000000000 +0100
@@ -715,6 +715,26 @@ #define FOR_EACH_BIT_IN_MINMAX_SET(VEC,
        minmax_set_iter_next (&(ITER)))
 
 struct target_ira_int {
+  /* Initialized once.  It is a maximal possible size of the allocated
+     struct costs.  */
+  int x_max_struct_costs_size;
+
+  /* Allocated and initialized once, and used to initialize cost values
+     for each insn.  */
+  struct costs *x_init_cost;
+
+  /* Allocated once, and used for temporary purposes.  */
+  struct costs *x_temp_costs;
+
+  /* Allocated once, and used for the cost calculation.  */
+  struct costs *x_op_costs[MAX_RECOG_OPERANDS];
+  struct costs *x_this_op_costs[MAX_RECOG_OPERANDS];
+
+  /* Classes used for cost calculation.  They may be different on
+     different iterations of the cost calculations or in different
+     optimization modes.  */
+  enum reg_class *x_cost_classes;
+
   /* Hard registers that can not be used for the register allocator for
      all functions of the current compilation unit.  */
   HARD_REG_SET x_no_unit_alloc_regs;
Index: gcc/ira-costs.c
===================================================================
--- gcc/ira-costs.c	2010-07-04 11:10:22.000000000 +0100
+++ gcc/ira-costs.c	2010-07-04 11:37:29.000000000 +0100
@@ -67,20 +67,18 @@ struct costs
   int cost[1];
 };
 
-/* Initialized once.  It is a maximal possible size of the allocated
-   struct costs.  */
-static int max_struct_costs_size;
-
-/* Allocated and initialized once, and used to initialize cost values
-   for each insn.  */
-static struct costs *init_cost;
-
-/* Allocated once, and used for temporary purposes.  */
-static struct costs *temp_costs;
-
-/* Allocated once, and used for the cost calculation.  */
-static struct costs *op_costs[MAX_RECOG_OPERANDS];
-static struct costs *this_op_costs[MAX_RECOG_OPERANDS];
+#define max_struct_costs_size \
+  (this_target_ira_int->x_max_struct_costs_size)
+#define init_cost \
+  (this_target_ira_int->x_init_cost)
+#define temp_costs \
+  (this_target_ira_int->x_temp_costs)
+#define op_costs \
+  (this_target_ira_int->x_op_costs)
+#define this_op_costs \
+  (this_target_ira_int->x_this_op_costs)
+#define cost_classes \
+  (this_target_ira_int->x_cost_classes)
 
 /* Costs of each class for each allocno or pseudo.  */
 static struct costs *costs;
@@ -88,11 +86,6 @@ struct costs
 /* Accumulated costs of each class for each allocno.  */
 static struct costs *total_allocno_costs;
 
-/* Classes used for cost calculation.  They may be different on
-   different iterations of the cost calculations or in different
-   optimization modes.  */
-static enum reg_class *cost_classes;
-
 /* The size of the previous array.  */
 static int cost_classes_num;
 
@@ -209,8 +202,7 @@ copy_cost (rtx x, enum machine_mode mode
 static void
 record_reg_classes (int n_alts, int n_ops, rtx *ops,
 		    enum machine_mode *modes, const char **constraints,
-		    rtx insn, struct costs **op_costs,
-		    enum reg_class *pref)
+		    rtx insn, enum reg_class *pref)
 {
   int alt;
   int i, j, k;
@@ -944,7 +936,7 @@ record_address_regs (enum machine_mode m
 
 /* Calculate the costs of insn operands.  */
 static void
-record_operand_costs (rtx insn, struct costs **op_costs, enum reg_class *pref)
+record_operand_costs (rtx insn, enum reg_class *pref)
 {
   const char *constraints[MAX_RECOG_OPERANDS];
   enum machine_mode modes[MAX_RECOG_OPERANDS];
@@ -997,11 +989,11 @@ record_operand_costs (rtx insn, struct c
 	xconstraints[i+1] = constraints[i];
 	record_reg_classes (recog_data.n_alternatives, recog_data.n_operands,
 			    recog_data.operand, modes,
-			    xconstraints, insn, op_costs, pref);
+			    xconstraints, insn, pref);
       }
   record_reg_classes (recog_data.n_alternatives, recog_data.n_operands,
 		      recog_data.operand, modes,
-		      constraints, insn, op_costs, pref);
+		      constraints, insn, pref);
 }
 
 
@@ -1046,7 +1038,7 @@ scan_one_insn (rtx insn)
 			   0, MEM, SCRATCH, frequency * 2);
     }
 
-  record_operand_costs (insn, op_costs, pref);
+  record_operand_costs (insn, pref);
 
   /* Now add the cost for each operand to the total costs for its
      allocno.  */