avr.c (initial_elimination_offset): Rename to avr_initial_elimination_offset.

	* config/avr/avr.c (initial_elimination_offset): Rename to
	avr_initial_elimination_offset.
	(frame_pointer_required_p): Rename to avr_frame_pointer_required_p,
	change return type to bool.
	(avr_can_eliminate): New function.
	* config/avr/avr.h (CAN_ELIMINATE): Use avr_can_eliminate.
	(FRAME_POINTER_REQUIRED): Use avr_frame_pointer_required_p.
	(INITIAL_ELIMINATION_OFFSET): Use avr_initial_elimination_offset.
	* config/avr/avr-protos.h (initial_elimination_offset) : Rename to
	avr_initial_elimination_offset.
	(frame_pointer_required_p): Rename to avr_frame_pointer_required_p.
	(avr_initial_elimination_offset): Define.

From-SVN: r146989

gcc/ChangeLog

+2009-04-29  Anatoly Sokolov  <aesok@post.ru>
+
+	* config/avr/avr.c (initial_elimination_offset): Rename to
+	avr_initial_elimination_offset.
+	(frame_pointer_required_p): Rename to avr_frame_pointer_required_p,
+	change return type to bool.
+	(avr_can_eliminate): New function.
+	* config/avr/avr.h (CAN_ELIMINATE): Use avr_can_eliminate.
+	(FRAME_POINTER_REQUIRED): Use avr_frame_pointer_required_p.
+	(INITIAL_ELIMINATION_OFFSET): Use avr_initial_elimination_offset.
+	* config/avr/avr-protos.h (initial_elimination_offset) : Rename to
+	avr_initial_elimination_offset.
+	(frame_pointer_required_p): Rename to avr_frame_pointer_required_p.
+	(avr_initial_elimination_offset): Define.
+
 2009-04-29  Eric Botcazou  <ebotcazou@adacore.com>
             Steven Bosscher  <steven@gcc.gnu.org>
 

gcc/config/avr/avr-protos.h

@@ -30,11 +30,12 @@ extern int avr_ret_register (void);
 extern enum reg_class class_likely_spilled_p (int c);
 extern enum reg_class avr_regno_reg_class (int r);
 extern enum reg_class avr_reg_class_from_letter (int c);
-extern int frame_pointer_required_p (void);
+extern int avr_frame_pointer_required_p (void);
 extern void asm_globalize_label (FILE *file, const char *name);
 extern void avr_asm_declare_function_name (FILE *, const char *, tree);
 extern void order_regs_for_local_alloc (void);
-extern int initial_elimination_offset (int from, int to);
+extern bool avr_can_eliminate (int, int);
+extern int avr_initial_elimination_offset (int from, int to);
 extern int avr_simple_epilogue (void);
 extern void gas_output_limited_string (FILE *file, const char *str);
 extern void gas_output_ascii (FILE *file, const char *str, size_t length);

gcc/config/avr/avr.c

@@ -545,10 +545,21 @@ avr_regs_to_save (HARD_REG_SET *set)
   return count;
 }
 
+/* Return true if register FROM can be eliminated via register TO.  */
+
+bool
+avr_can_eliminate (int from, int to)
+{
+  return ((from == ARG_POINTER_REGNUM && to == FRAME_POINTER_REGNUM)
+	  || ((from == FRAME_POINTER_REGNUM 
+	       || from == FRAME_POINTER_REGNUM + 1)
+	      && !frame_pointer_needed));
+}
+
 /* Compute offset between arg_pointer and frame_pointer.  */
 
 int
-initial_elimination_offset (int from, int to)
+avr_initial_elimination_offset (int from, int to)
 {
   if (from == FRAME_POINTER_REGNUM && to == STACK_POINTER_REGNUM)
     return 0;
@@ -2843,8 +2854,8 @@ out_movhi_mr_r (rtx insn, rtx op[], int *l)
 
 /* Return 1 if frame pointer for current function required.  */
 
-int
-frame_pointer_required_p (void)
+bool
+avr_frame_pointer_required_p (void)
 {
   return (cfun->calls_alloca
 	  || crtl->args.info.nregs == 0

gcc/config/avr/avr.h

@@ -350,7 +350,7 @@ enum reg_class {
 
 #define STATIC_CHAIN_REGNUM 2
 
-#define FRAME_POINTER_REQUIRED frame_pointer_required_p()
+#define FRAME_POINTER_REQUIRED avr_frame_pointer_required_p()
 
 /* Offset from the frame pointer register value to the top of the stack.  */
 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0
@@ -360,15 +360,10 @@ enum reg_class {
 	{FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}		\
        ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
 
-#define CAN_ELIMINATE(FROM, TO) (((FROM) == ARG_POINTER_REGNUM		   \
-				  && (TO) == FRAME_POINTER_REGNUM)	   \
-				 || (((FROM) == FRAME_POINTER_REGNUM	   \
-				      || (FROM) == FRAME_POINTER_REGNUM+1) \
-				     && ! FRAME_POINTER_REQUIRED	   \
-				     ))
+#define CAN_ELIMINATE(FROM, TO)	avr_can_eliminate (FROM, TO)
 
 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)			\
-     OFFSET = initial_elimination_offset (FROM, TO)
+  OFFSET = avr_initial_elimination_offset (FROM, TO)
 
 #define RETURN_ADDR_RTX(count, x) \
   gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1)))