dwarf2out.c (rtl_for_decl_location): Avoid segfault if DECL_INCOMING_RTL is NULL.

	* dwarf2out.c (rtl_for_decl_location): Avoid segfault if
	DECL_INCOMING_RTL is NULL.

	* gcc.dg/debug/20041023-1.c: New test.

From-SVN: r89554

gcc/ChangeLog

+2004-10-25  Jakub Jelinek  <jakub@redhat.com>
+
+	* dwarf2out.c (rtl_for_decl_location): Avoid segfault if
+	DECL_INCOMING_RTL is NULL.
+
 2004-10-25  Steven Bosscher  <stevenb@suse.de>
 
 	* timevar.def (TV_FIND_REFERENCED_VARS): New.

gcc/dwarf2out.c

@@ -9807,7 +9807,8 @@ rtl_for_decl_location (tree decl)
 	  if (dmode == pmode)
 	    rtl = DECL_INCOMING_RTL (decl);
 	  else if (SCALAR_INT_MODE_P (dmode)
-		   && GET_MODE_SIZE (dmode) <= GET_MODE_SIZE (pmode))
+		   && GET_MODE_SIZE (dmode) <= GET_MODE_SIZE (pmode)
+		   && DECL_INCOMING_RTL (decl))
 	    {
 	      rtx inc = DECL_INCOMING_RTL (decl);
 	      if (REG_P (inc))

gcc/testsuite/ChangeLog

+2004-10-25  Jakub Jelinek  <jakub@redhat.com>
+
+	* gcc.dg/debug/20041023-1.c: New test.
+
 2004-10-25  Andrew Pinski  <pinskia@physics.uc.edu>
 
 	PR middle-end/17407

gcc/testsuite/gcc.dg/debug/20041023-1.c

+/* { dg-do compile } */
+
+static void
+foo (unsigned char x)
+{
+  unsigned char a[5 + x];
+}
+
+void
+bar (void)
+{
+  foo (80);
+}