- int i, size;
- cost
- = (freq
- * (in_p
- ? ira_get_register_move_cost (mode, cover_class, cl)
- : ira_get_register_move_cost (mode, cl, cover_class)));
- ira_allocate_and_set_costs
- (&ALLOCNO_CONFLICT_HARD_REG_COSTS (operand_a), cover_class, 0);
- size = ira_reg_class_nregs[cover_class][mode];
- for (i = 0; i < size; i++)
- ALLOCNO_CONFLICT_HARD_REG_COSTS (operand_a)
- [ira_class_hard_reg_index
- [cover_class][ira_class_hard_regs[cl][i]]]
- -= cost;
+ /* View the desired allocation of OPERAND as:
+
+ (REG:YMODE YREGNO),
+
+ a simplification of:
+
+ (subreg:YMODE (reg:XMODE XREGNO) OFFSET). */
+ enum machine_mode ymode, xmode;
+ int xregno, yregno;
+ HOST_WIDE_INT offset;
+
+ xmode = recog_data.operand_mode[i];
+ xregno = ira_class_hard_regs[cl][0];
+ ymode = ALLOCNO_MODE (operand_a);
+ offset = subreg_lowpart_offset (ymode, xmode);
+ yregno = simplify_subreg_regno (xregno, xmode, offset, ymode);
+ if (yregno >= 0
+ && ira_class_hard_reg_index[aclass][yregno] >= 0)
+ {
+ int cost;
+
+ ira_allocate_and_set_costs
+ (&ALLOCNO_CONFLICT_HARD_REG_COSTS (operand_a),
+ aclass, 0);
+ ira_init_register_move_cost_if_necessary (xmode);
+ cost = freq * (in_p
+ ? ira_register_move_cost[xmode][aclass][cl]
+ : ira_register_move_cost[xmode][cl][aclass]);
+ ALLOCNO_CONFLICT_HARD_REG_COSTS (operand_a)
+ [ira_class_hard_reg_index[aclass][yregno]] -= cost;
+ }