[(set_attr "type" "store,load,move,store,load")
(set_attr "length" "1,1,2,3,3")])
+;; Must handle overlapping registers here, since parameters can be unaligned
+;; in registers.
;; ??? Do we need a v9 version of this?
(define_split
[(set (match_operand:DF 0 "register_operand" "")
[(set (match_dup 2) (match_dup 3))
(set (match_dup 4) (match_dup 5))]
"
-{ operands[2] = operand_subword (operands[0], 0, 0, DFmode);
- operands[3] = operand_subword (operands[1], 0, 0, DFmode);
- operands[4] = operand_subword (operands[0], 1, 0, DFmode);
- operands[5] = operand_subword (operands[1], 1, 0, DFmode); }")
+{
+ rtx first_set = operand_subword (operands[0], 0, 0, DFmode);
+ rtx second_use = operand_subword (operands[1], 1, 0, DFmode);
+
+ if (REGNO (first_set) == REGNO (second_use))
+ {
+ operands[2] = operand_subword (operands[0], 1, 0, DFmode);
+ operands[3] = second_use;
+ operands[4] = first_set;
+ operands[5] = operand_subword (operands[1], 0, 0, DFmode);
+ }
+ else
+ {
+ operands[2] = first_set;
+ operands[3] = operand_subword (operands[1], 0, 0, DFmode);
+ operands[4] = operand_subword (operands[0], 1, 0, DFmode);
+ operands[5] = second_use;
+ }
+}")
(define_insn ""
[(set (mem:DF (match_operand:SI 0 "symbolic_operand" "i,i"))