darwin.h (PREFERRED_RELOAD_CLASS): Always return a subset of the input class.

	* config/rs6000/darwin.h (PREFERRED_RELOAD_CLASS): Always return
	a subset of the input class.

From-SVN: r71128

gcc/ChangeLog

+2003-09-05  Geoffrey Keating  <geoffk@apple.com>
+
+	* config/rs6000/darwin.h (PREFERRED_RELOAD_CLASS): Always return
+	a subset of the input class.
+
 2003-09-05  Kazu Hirata  <kazu@cs.umass.edu>
 
 	* config/i860/i860.c: Follow spelling conventions.

gcc/config/rs6000/darwin.h

@@ -245,16 +245,17 @@ do {									\
    a SYMBOL_REF.  */
 
 #undef PREFERRED_RELOAD_CLASS
-#define PREFERRED_RELOAD_CLASS(X,CLASS)			\
-  (((GET_CODE (X) == CONST_DOUBLE			\
-    && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT)	\
-   ? NO_REGS						\
-   : (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT 	\
-      && (CLASS) == NON_SPECIAL_REGS)			\
-   ? GENERAL_REGS					\
-   : (GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH)	\
-   ? BASE_REGS						\
-   : (CLASS)))
+#define PREFERRED_RELOAD_CLASS(X,CLASS)				\
+  ((GET_CODE (X) == CONST_DOUBLE				\
+    && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT)		\
+   ? NO_REGS							\
+   : ((GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH)	\
+      && reg_class_subset_p (BASE_REGS, (CLASS)))		\
+   ? BASE_REGS							\
+   : (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT			\
+      && (CLASS) == NON_SPECIAL_REGS)				\
+   ? GENERAL_REGS						\
+   : (CLASS))
 
 /* Fix for emit_group_load (): force large constants to be pushed via regs.  */
 #define ALWAYS_PUSH_CONSTS_USING_REGS_P		1