Fix for execute/980205.c failure on SH[123].

	* sh.c (sh_expand_prologue, in !SH3E code): Don't push an extra
	register for stdarg functions.
	* sh.h (current_function_varargs): Declare.
	(FUNCTION_ARG): Ignore NAMED for stdarg functions.

From-SVN: r19391

gcc/ChangeLog

+Fri Apr 24 04:42:35 1998  J"orn Rennecke <amylaar@cygnus.co.uk>
+
+	* sh.c (sh_expand_prologue, in !SH3E code): Don't push an extra
+	register for stdarg functions.
+	* sh.h (current_function_varargs): Declare.
+	(FUNCTION_ARG): Ignore NAMED for stdarg functions.
+
 1998-04-23  Jim Wilson  <wilson@cygnus.com>
 
 	* frame.c, libgcc2.c (stdlib.h, unistd.h): Don't include when

gcc/config/sh/sh.c

@@ -3488,9 +3488,9 @@ sh_expand_prologue ()
 	  for (i = 0; i < NPARM_REGS(SImode); i++)
 	    {
 	      int rn = NPARM_REGS(SImode) + FIRST_PARM_REG - i - 1;
-	      if (i > (NPARM_REGS(SImode) 
-		       - current_function_args_info.arg_count[(int) SH_ARG_INT]
-		       - current_function_varargs))
+	      if (i >= (NPARM_REGS(SImode) 
+			- current_function_args_info.arg_count[(int) SH_ARG_INT]
+			))
 		break;
 	      push (rn);
 	      extra_push += 4;

gcc/config/sh/sh.h

@@ -875,9 +875,11 @@ struct sh_args {
    NPARM_REGS words is at least partially passed in a register unless
    its data type forbids.  */
 
+extern int current_function_varargs;
+
 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
   ((PASS_IN_REG_P ((CUM), (MODE), (TYPE))				\
-    && ((NAMED) || TARGET_SH3E))					\
+    && ((NAMED) || TARGET_SH3E || ! current_function_varargs))		\
    ? gen_rtx (REG, (MODE),						\
 	      (BASE_ARG_REG (MODE) + ROUND_REG ((CUM), (MODE)))) \
    : 0)
@@ -890,7 +892,6 @@ struct sh_args {
 
 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
   ((PASS_IN_REG_P ((CUM), (MODE), (TYPE))			\
-    && ((NAMED) || TARGET_SH3E)					\
     && (ROUND_REG ((CUM), (MODE))				\
 	+ (MODE != BLKmode					\
 	   ? ROUND_ADVANCE (GET_MODE_SIZE (MODE))		\