h8300.md: Organize peephole2's that trasform (compare (reg:HI) (const_int)).

	* config/h8300/h8300.md: Organize peephole2's that trasform
	(compare (reg:HI) (const_int)).

From-SVN: r65089

gcc/ChangeLog

+2003-03-31  Kazu Hirata  <kazu@cs.umass.edu>
+
+	* config/h8300/h8300.md: Organize peephole2's that trasform
+	(compare (reg:HI) (const_int)).
+
 2003-03-31  Roger Sayle  <roger@eyesopen.com>
 
 	* emit-rtl.c (dconstm2, dconsthalf): New real constants.

gcc/config/h8300/h8300.md

@@ -3969,7 +3969,50 @@
 ;; dead     1                       geu/ltu shlr.l
 ;; dead     3 (H8S)                 geu/ltu shlr.l
 ;;
-;; dead   255                       geu/ltu mov.b
+;; ----   255                       geu/ltu mov.b
+
+;; Transform
+;;
+;;	cmp.w	#1,r0
+;;	bne	.L1
+;;
+;; into
+;;
+;;	dec.w	#1,r0
+;;	bne	.L1
+
+(define_peephole2
+  [(set (cc0)
+	(compare (match_operand:HI 0 "register_operand" "")
+		 (match_operand:HI 1 "incdec_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])"
+  [(set (match_dup 0)
+	(unspec:HI [(match_dup 0)
+		    (match_dup 4)]
+		   UNSPEC_INCDEC))
+   (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]));")
+
+;; Transform
+;;
+;;	cmp.w	#1,r0
+;;	bhi	.L1
+;;
+;; into
+;;
+;;	shlr.w	r0
+;;	bne	.L1
 
 (define_peephole2
   [(set (cc0)
@@ -3999,6 +4042,37 @@
 		  gen_rtx_EQ (VOIDmode, cc0_rtx, const0_rtx));
    operands[5] = GEN_INT (exact_log2 (INTVAL (operands[1]) + 1));")
 
+;; Transform
+;;
+;;	cmp.w	#255,r0
+;;	bhi	.L1
+;;
+;; into
+;;
+;;	mov.b	r0h,r0h
+;;	bne	.L1
+
+(define_peephole2
+  [(set (cc0)
+	(compare (match_operand:HI 0 "register_operand" "")
+		 (const_int 255)))
+   (set (pc)
+	(if_then_else (match_operator 1 "gtuleu_operator"
+			[(cc0) (const_int 0)])
+		      (label_ref (match_operand 2 "" ""))
+		      (pc)))]
+  "TARGET_H8300H || TARGET_H8300S"
+  [(set (cc0)
+	(and:HI (match_dup 0)
+		(const_int -256)))
+   (set (pc)
+	(if_then_else (match_dup 4)
+		      (label_ref (match_dup 2))
+		      (pc)))]
+  "operands[4] = ((GET_CODE (operands[1]) == GTU) ?
+		  gen_rtx_NE (VOIDmode, cc0_rtx, const0_rtx) :
+		  gen_rtx_EQ (VOIDmode, cc0_rtx, const0_rtx));")
+
 ;; (compare (reg:SI) (const_int)) takes 6 bytes, so we try to achieve
 ;; the equivalent with shorter sequences.  Here is the summary.  Cases
 ;; are grouped for each define_peephole2.
@@ -4043,31 +4117,6 @@
 
 (define_peephole2
   [(set (cc0)
-	(compare (match_operand:HI 0 "register_operand" "")
-		 (match_operand:HI 1 "incdec_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])"
-  [(set (match_dup 0)
-	(unspec:HI [(match_dup 0)
-		    (match_dup 4)]
-		   UNSPEC_INCDEC))
-   (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]));")
-
-;; The SImode version of the previous pattern.
-
-(define_peephole2
-  [(set (cc0)
 	(compare (match_operand:SI 0 "register_operand" "")
 		 (match_operand:SI 1 "incdec_operand" "")))
    (set (pc)
@@ -4209,29 +4258,6 @@
 		  gen_rtx_EQ (VOIDmode, cc0_rtx, const0_rtx));
    operands[5] = GEN_INT (~INTVAL (operands[1]));")
 
-;; Transform A <= 255 to (A & 0xff00) == 0.
-
-(define_peephole2
-  [(set (cc0)
-	(compare (match_operand:HI 0 "register_operand" "")
-		 (const_int 255)))
-   (set (pc)
-	(if_then_else (match_operator 1 "gtuleu_operator"
-			[(cc0) (const_int 0)])
-		      (label_ref (match_operand 2 "" ""))
-		      (pc)))]
-  "TARGET_H8300H || TARGET_H8300S"
-  [(set (cc0)
-	(and:HI (match_dup 0)
-		(const_int -256)))
-   (set (pc)
-	(if_then_else (match_dup 4)
-		      (label_ref (match_dup 2))
-		      (pc)))]
-  "operands[4] = ((GET_CODE (operands[1]) == GTU) ?
-		  gen_rtx_NE (VOIDmode, cc0_rtx, const0_rtx) :
-		  gen_rtx_EQ (VOIDmode, cc0_rtx, const0_rtx));")
-
 ;; Transform A <= 65535 to (A & 0xffff0000) == 0.
 
 (define_peephole2