h8300.h (FUNCTION_VALUE): Use R0_REG.

	* config/h8300/h8300.h (FUNCTION_VALUE): Use R0_REG.
	(FUNCTION_VALUE_REGNO_P): Likewise.
	* config/h8300/h8300.md: Define R0_REG.

From-SVN: r73998

gcc/ChangeLog

 2003-11-27  Kazu Hirata  <kazu@cs.umass.edu>
 
+	* config/h8300/h8300.h (FUNCTION_VALUE): Use R0_REG.
+	(FUNCTION_VALUE_REGNO_P): Likewise.
+	* config/h8300/h8300.md: Define R0_REG.
+
+2003-11-27  Kazu Hirata  <kazu@cs.umass.edu>
+
 	* config/h8300/h8300.c: Fix formatting.
 	* config/h8300/h8300.md: Likewise.
 

gcc/config/h8300/h8300.h

@@ -609,7 +609,7 @@ enum reg_class {
    On the H8 the return value is in R0/R1.  */
 
 #define FUNCTION_VALUE(VALTYPE, FUNC) \
-  gen_rtx_REG (TYPE_MODE (VALTYPE), 0)
+  gen_rtx_REG (TYPE_MODE (VALTYPE), R0_REG)
 
 /* Define how to find the value returned by a library function
    assuming the value has mode MODE.  */
@@ -622,7 +622,7 @@ enum reg_class {
 /* 1 if N is a possible register number for a function value.
    On the H8, R0 is the only register thus used.  */
 
-#define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
+#define FUNCTION_VALUE_REGNO_P(N) ((N) == R0_REG)
 
 /* Define this if PCC uses the nonreentrant convention for returning
    structure and union values.  */

gcc/config/h8300/h8300.md

@@ -53,7 +53,8 @@
    (UNSPEC_MONITOR	1)])
 
 (define_constants
-  [(SC_REG	 3)
+  [(R0_REG	 0)
+   (SC_REG	 3)
    (FP_REG	 6)
    (SP_REG	 7)
    (MAC_REG	 8)