[lm32] hookize FUNCTION_ARG &co.

diff --git a/gcc/config/lm32/lm32-protos.h b/gcc/config/lm32/lm32-protos.h
index 51e191b..ef78578 100644
--- a/gcc/config/lm32/lm32-protos.h
+++ b/gcc/config/lm32/lm32-protos.h
@@ -26,8 +26,7 @@  extern void lm32_expand_prologue (void);
 extern void lm32_expand_epilogue (void);
 extern void lm32_print_operand (FILE *file, rtx op, int letter);
 extern void lm32_print_operand_address (FILE *file, rtx addr);
-extern rtx lm32_function_arg (CUMULATIVE_ARGS cum, enum machine_mode mode,
-                              tree type, int named);
+extern void lm32_override_options (void);
 extern HOST_WIDE_INT lm32_compute_initial_elimination_offset (int from, 
                                                              int to);
 extern int lm32_can_use_return (void);
diff --git a/gcc/config/lm32/lm32.c b/gcc/config/lm32/lm32.c
index 671f0e1..6f641b7 100644
--- a/gcc/config/lm32/lm32.c
+++ b/gcc/config/lm32/lm32.c
@@ -76,6 +76,13 @@  static bool
 lm32_legitimate_address_p (enum machine_mode mode, rtx x, bool strict);
 static HOST_WIDE_INT lm32_compute_frame_size (int size);
 static void lm32_option_override (void);
+static bool lm32_handle_option (size_t code, const char *arg, int value);
+static rtx lm32_function_arg (CUMULATIVE_ARGS * cum,
+			      enum machine_mode mode, const_tree type,
+			      bool named);
+static void lm32_function_arg_advance (CUMULATIVE_ARGS * cum,
+				       enum machine_mode mode,
+				       const_tree type, bool named);
 
 #undef TARGET_OPTION_OVERRIDE
 #define TARGET_OPTION_OVERRIDE lm32_option_override
@@ -89,6 +96,10 @@  static void lm32_option_override (void);
 #define TARGET_PROMOTE_FUNCTION_MODE default_promote_function_mode_always_promote
 #undef TARGET_SETUP_INCOMING_VARARGS
 #define TARGET_SETUP_INCOMING_VARARGS lm32_setup_incoming_varargs
+#undef TARGET_FUNCTION_ARG
+#define TARGET_FUNCTION_ARG lm32_function_arg
+#undef TARGET_FUNCTION_ARG_ADVANCE
+#define TARGET_FUNCTION_ARG_ADVANCE lm32_function_arg_advance
 #undef TARGET_PROMOTE_PROTOTYPES
 #define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true
 #undef TARGET_MIN_ANCHOR_OFFSET
@@ -604,9 +615,9 @@  lm32_print_operand_address (FILE * file, rtx addr)
    NAMED is nonzero if this argument is a named parameter
     (otherwise it is an extra parameter matching an ellipsis).  */
 
-rtx
-lm32_function_arg (CUMULATIVE_ARGS cum, enum machine_mode mode,
-		   tree type, int named)
+static rtx
+lm32_function_arg (CUMULATIVE_ARGS *cum, enum machine_mode mode,
+		   const_tree type, bool named)
 {
   if (mode == VOIDmode)
     /* Compute operand 2 of the call insn.  */
@@ -615,10 +626,17 @@  lm32_function_arg (CUMULATIVE_ARGS cum, enum machine_mode mode,
   if (targetm.calls.must_pass_in_stack (mode, type))
     return NULL_RTX;
 
-  if (!named || (cum + LM32_NUM_REGS2 (mode, type) > LM32_NUM_ARG_REGS))
+  if (!named || (*cum + LM32_NUM_REGS2 (mode, type) > LM32_NUM_ARG_REGS))
     return NULL_RTX;
 
-  return gen_rtx_REG (mode, cum + LM32_FIRST_ARG_REG);
+  return gen_rtx_REG (mode, *cum + LM32_FIRST_ARG_REG);
+}
+
+static void
+lm32_function_arg_advance (CUMULATIVE_ARGS *cum, enum machine_mode mode,
+			   const_tree type, bool named ATTRIBUTE_UNUSED)
+{
+  *cum += LM32_NUM_REGS2 (mode, type);
 }
 
 HOST_WIDE_INT
diff --git a/gcc/config/lm32/lm32.h b/gcc/config/lm32/lm32.h
index b0c2d59..5eb64bb 100644
--- a/gcc/config/lm32/lm32.h
+++ b/gcc/config/lm32/lm32.h
@@ -287,9 +287,6 @@  enum reg_class
 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT,N_NAMED_ARGS)  \
   (CUM) = 0
 
-#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)                    \
-  (CUM) += LM32_NUM_REGS2 (MODE, TYPE)
-
 #define FUNCTION_ARG_REGNO_P(r)                                         \
   (((r) >= LM32_FIRST_ARG_REG) && ((r) <= LM32_NUM_ARG_REGS))