emit-rtl.c (set_decl_incoming_rtl): Check whether the 0th element of PARALLEL is NULL.

	* emit-rtl.c (set_decl_incoming_rtl): Check whether the 0th element of
	PARALLEL is NULL.

From-SVN: r77811

gcc/ChangeLog

+2004-02-14  Josef Zlomek  <zlomekj@suse.cz>
+
+	* emit-rtl.c (set_decl_incoming_rtl): Check whether the 0th element of
+	PARALLEL is NULL.
+
 2004-02-14  Per Bothner  <per@bothner.com>
 
 	* fix-header.c (line_table):  Move local variable in main to global.

gcc/emit-rtl.c

@@ -852,8 +852,16 @@ set_decl_incoming_rtl (tree t, rtx x)
     }
   if (GET_CODE (x) == PARALLEL)
     {
-      int i;
-      for (i = 0; i < XVECLEN (x, 0); i++)
+      int i, start;
+
+      /* Check for a NULL entry, used to indicate that the parameter goes
+	 both on the stack and in registers.  */
+      if (XEXP (XVECEXP (x, 0, 0), 0))
+	start = 0;
+      else
+	start = 1;
+
+      for (i = start; i < XVECLEN (x, 0); i++)
 	{
 	  rtx y = XVECEXP (x, 0, i);
 	  if (REG_P (XEXP (y, 0)))