+2003-03-01 Kazu Hirata <kazu@cs.umass.edu>
+
+ * config/h8300/h8300.md (a peephole2): New.
+
2003-03-01 Richard Earnshaw <rearnsha@arm.com>
* predict.c (estimate_bb_frequencies): Correctly set
;; dead 1 eq/ne dec.l
;; dead 2 eq/ne dec.l
;;
+;; dead -131072 eq/ne inc.w and test
+;; dead -65536 eq/ne inc.w and test
+;; dead 65536 eq/ne inc.w and test
+;; dead 131072 eq/ne inc.w and test
+;;
;; dead 0x000000?? except 1 and 2 eq/ne xor.b and test
;; dead 0x0000??00 eq/ne xor.b and test
;; dead 0x0000ffff eq/ne not.w and test
(pc)))]
"operands[4] = GEN_INT (- INTVAL (operands[1]));")
+(define_peephole2
+ [(set (cc0)
+ (compare (match_operand:SI 0 "register_operand" "")
+ (match_operand:SI 1 "const_int_operand" "")))
+ (set (pc)
+ (if_then_else (match_operator 3 "eqne_operator"
+ [(cc0) (const_int 0)])
+ (label_ref (match_operand 2 "" ""))
+ (pc)))]
+ "(TARGET_H8300H || TARGET_H8300S)
+ && peep2_reg_dead_p (1, operands[0])
+ && (INTVAL (operands[1]) == -131072
+ || INTVAL (operands[1]) == -65536
+ || INTVAL (operands[1]) == 65536
+ || INTVAL (operands[1]) == 131072)"
+ [(set (match_dup 0)
+ (plus:SI (match_dup 0)
+ (match_dup 4)))
+ (set (cc0)
+ (match_dup 0))
+ (set (pc)
+ (if_then_else (match_op_dup 3 [(cc0) (const_int 0)])
+ (label_ref (match_dup 2))
+ (pc)))]
+ "operands[4] = GEN_INT (- INTVAL (operands[1]));")
+
;; For certain (in)equaltity comparisions against a constant, we can
;; XOR the register with the constant, and test the register against
;; 0.