h8300.md (anonymous movhi pattern): Don't move (reg n) to (mem (pre_dec (reg n))…

h8300.md (anonymous movhi pattern): Don't move (reg n) to (mem (pre_dec (reg n)) (anonymous movsi pattern): Likewise.

	* h8300.md (anonymous movhi pattern): Don't move (reg n) to
	(mem (pre_dec (reg n))
	(anonymous movsi pattern): Likewise.

From-SVN: r45266

gcc/ChangeLog

 2001-08-29  Kazu Hirata  <kazu@hxi.com>
 
+	* h8300.md (anonymous movhi pattern): Don't move (reg n) to
+	(mem (pre_dec (reg n))
+	(anonymous movsi pattern): Likewise.
+
+2001-08-29  Kazu Hirata  <kazu@hxi.com>
+
 	* h8300.h (RETURN_ADDR_RTX): New.
 
 2001-08-29  Kazu Hirata  <kazu@hxi.com>

gcc/config/h8300/h8300.md

@@ -175,7 +175,12 @@
 	(match_operand:HI 1 "general_operand_src" "I,r>,r,i,m,r"))]
   "TARGET_H8300
    && (register_operand (operands[0],HImode)
-       || register_operand (operands[1], HImode))"
+       || register_operand (operands[1], HImode))
+   && !(GET_CODE (operands[0]) == MEM
+	&& GET_CODE (XEXP (operands[0], 0)) == PRE_DEC
+	&& GET_CODE (XEXP (XEXP (operands[0], 0), 0)) == REG
+	&& GET_CODE (operands[1]) == REG
+	&& REGNO (XEXP (XEXP (operands[0], 0), 0)) == REGNO (operands[1]))"
   "@
    sub.w	%T0,%T0
    mov.w	%T1,%T0
@@ -404,7 +409,12 @@
 	(match_operand:SI 1 "general_operand_src" "I,r,i,m,r,r,>,I,r,*a"))]
   "(TARGET_H8300S || TARGET_H8300H)
    && (register_operand (operands[0], SImode)
-       || register_operand (operands[1], SImode))"
+       || register_operand (operands[1], SImode))
+   && !(GET_CODE (operands[0]) == MEM
+	&& GET_CODE (XEXP (operands[0], 0)) == PRE_DEC
+	&& GET_CODE (XEXP (XEXP (operands[0], 0), 0)) == REG
+	&& GET_CODE (operands[1]) == REG
+	&& REGNO (XEXP (XEXP (operands[0], 0), 0)) == REGNO (operands[1]))"
   "*
 {
   switch (which_alternative)