[fr30] hookize FUNCTION_ARG &co.

[Nathan Froyd <froydnj at codesourcery dot com>]

The patch below hookizes FUNCTION_ARG and related macros for the fr30
backend.  Nothing special here.

Tested by inspection with cross to fr30-elf.  I plan to commit this
under the obvious rule after waiting a week for comments/approval.

	* config/fr30/fr30-protos.h (fr30_num_arg_regs): Delete.
	* config/fr30/fr30.h (FUNCTION_ARG, FUNCTION_ARG_ADVANCE): Delete.
	* config/fr30/fr30.c (fr30_num_arg_regs): Make static.  Take a
	const_tree.
	(fr30_function_arg): New function.
	(fr30_function_arg_advance): New function.
	(TARGET_FUNCTION_ARG, TARGET_FUNCTION_ARG_ADVANCE): Define.
---
 gcc/config/fr30/fr30-protos.h |    3 ---
 gcc/config/fr30/fr30.c        |   40 ++++++++++++++++++++++++++++++++++++++--
 gcc/config/fr30/fr30.h        |   17 -----------------
 3 files changed, 38 insertions(+), 22 deletions(-)

diff --git a/gcc/config/fr30/fr30-protos.h b/gcc/config/fr30/fr30-protos.h
index 0ea28a3..37fc2a2 100644
--- a/gcc/config/fr30/fr30-protos.h
+++ b/gcc/config/fr30/fr30-protos.h
@@ -26,9 +26,6 @@ extern int   fr30_check_multiple_regs (rtx *, int, int);
 extern void  fr30_print_operand (FILE *, rtx, int);
 extern void  fr30_print_operand_address (FILE *, rtx);
 extern rtx   fr30_move_double (rtx *);
-#ifdef TREE_CODE
-extern int   fr30_num_arg_regs (enum machine_mode, tree);
-#endif /* TREE_CODE */
 #ifdef HAVE_MACHINE_MODES
 #define Mmode enum machine_mode
 extern int   fr30_const_double_is_zero (rtx);
diff --git a/gcc/config/fr30/fr30.c b/gcc/config/fr30/fr30.c
index 118de0a..50cf00c 100644
--- a/gcc/config/fr30/fr30.c
+++ b/gcc/config/fr30/fr30.c
@@ -119,10 +119,15 @@ static void fr30_setup_incoming_varargs (CUMULATIVE_ARGS *, enum machine_mode,
 static bool fr30_must_pass_in_stack (enum machine_mode, const_tree);
 static int fr30_arg_partial_bytes (CUMULATIVE_ARGS *, enum machine_mode,
 				   tree, bool);
+static rtx fr30_function_arg (CUMULATIVE_ARGS *, enum machine_mode,
+			      const_tree, bool);
+static void fr30_function_arg_advance (CUMULATIVE_ARGS *, enum machine_mode,
+				       const_tree, bool);
 static bool fr30_frame_pointer_required (void);
 static bool fr30_can_eliminate (const int, const int);
 static void fr30_asm_trampoline_template (FILE *);
 static void fr30_trampoline_init (rtx, tree, rtx);
+static int fr30_num_arg_regs (enum machine_mode, const_tree);
 
 #define FRAME_POINTER_MASK 	(1 << (FRAME_POINTER_REGNUM))
 #define RETURN_POINTER_MASK 	(1 << (RETURN_POINTER_REGNUM))
@@ -155,6 +160,10 @@ static void fr30_trampoline_init (rtx, tree, rtx);
 #define TARGET_PASS_BY_REFERENCE hook_pass_by_reference_must_pass_in_stack
 #undef  TARGET_ARG_PARTIAL_BYTES
 #define TARGET_ARG_PARTIAL_BYTES fr30_arg_partial_bytes
+#undef  TARGET_FUNCTION_ARG
+#define TARGET_FUNCTION_ARG fr30_function_arg
+#undef  TARGET_FUNCTION_ARG_ADVANCE
+#define TARGET_FUNCTION_ARG_ADVANCE fr30_function_arg_advance
 
 #undef  TARGET_SETUP_INCOMING_VARARGS
 #define TARGET_SETUP_INCOMING_VARARGS fr30_setup_incoming_varargs
@@ -698,8 +707,8 @@ fr30_must_pass_in_stack (enum machine_mode mode, const_tree type)
 
 /* Compute the number of word sized registers needed to hold a
    function argument of mode INT_MODE and tree type TYPE.  */
-int
-fr30_num_arg_regs (enum machine_mode mode, tree type)
+static int
+fr30_num_arg_regs (enum machine_mode mode, const_tree type)
 {
   int size;
 
@@ -743,6 +752,33 @@ fr30_arg_partial_bytes (CUMULATIVE_ARGS *cum, enum machine_mode mode,
   return (FR30_NUM_ARG_REGS - *cum) * UNITS_PER_WORD;
 }
 
+static rtx
+fr30_function_arg (CUMULATIVE_ARGS *cum, enum machine_mode mode,
+		   const_tree type, bool named)
+{
+  if (!named
+      || fr30_must_pass_in_stack (mode, type)
+      || *cum >= FR30_NUM_ARG_REGS)
+    return NULL_RTX;
+  else
+    return gen_rtx_REG (mode, *cum + FIRST_ARG_REGNUM);
+}
+
+/* A C statement (sans semicolon) to update the summarizer variable CUM to
+   advance past an argument in the argument list.  The values MODE, TYPE and
+   NAMED describe that argument.  Once this is done, the variable CUM is
+   suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
+
+   This macro need not do anything if the argument in question was passed on
+   the stack.  The compiler knows how to track the amount of stack space used
+   for arguments without any special help.  */
+static void
+fr30_function_arg_advance (CUMULATIVE_ARGS *cum, enum machine_mode mode,
+			   const_tree type, bool named)
+{
+  *cum += named * fr30_num_arg_regs (mode, type);
+}
+
 /*}}}*/
 /*{{{  Operand predicates */ 
 
diff --git a/gcc/config/fr30/fr30.h b/gcc/config/fr30/fr30.h
index ed675b1..90fc065 100644
--- a/gcc/config/fr30/fr30.h
+++ b/gcc/config/fr30/fr30.h
@@ -575,12 +575,6 @@ enum reg_class
      
 #define FR30_NUM_ARG_REGS	 4
 
-#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED)			\
-  (  (NAMED) == 0                    ? NULL_RTX			\
-   : targetm.calls.must_pass_in_stack (MODE, TYPE) ? NULL_RTX	\
-   : (CUM) >= FR30_NUM_ARG_REGS      ? NULL_RTX			\
-   : gen_rtx_REG (MODE, CUM + FIRST_ARG_REGNUM))
-
 /* A C type for declaring a variable that is used as the first argument of
    `FUNCTION_ARG' and other related values.  For some target machines, the type
    `int' suffices and can hold the number of bytes of argument so far.
@@ -614,17 +608,6 @@ enum reg_class
 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
   (CUM) = 0
 
-/* A C statement (sans semicolon) to update the summarizer variable CUM to
-   advance past an argument in the argument list.  The values MODE, TYPE and
-   NAMED describe that argument.  Once this is done, the variable CUM is
-   suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
-
-   This macro need not do anything if the argument in question was passed on
-   the stack.  The compiler knows how to track the amount of stack space used
-   for arguments without any special help.  */
-#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)			\
-  (CUM) += (NAMED) * fr30_num_arg_regs (MODE, TYPE)
-
 /* A C expression that is nonzero if REGNO is the number of a hard register in
    which function arguments are sometimes passed.  This does *not* include
    implicit arguments such as the static chain and the structure-value address.
-- 
1.7.0.4