2005-01-26  Daniel Berlin  <dberlin@dberlin.org>
	
	Fix PR debug/19345

	* dwarf2out.c (add_abstract_origin_attribute): TYPE_STUB_DECL is
	not always going to give us a non-NULL result, so guard against that.

Index: dwarf2out.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/dwarf2out.c,v
retrieving revision 1.568
diff -u -p -r1.568 dwarf2out.c
--- dwarf2out.c	20 Jan 2005 20:09:22 -0000	1.568
+++ dwarf2out.c	27 Jan 2005 03:17:40 -0000
@@ -10497,8 +10497,12 @@ add_abstract_origin_attribute (dw_die_re
 
       if (TYPE_P (fn))
 	fn = TYPE_STUB_DECL (fn);
+      
+      /* TYPE_STUB_DECL may have given us a NULL, which decl_function_context
+	 won't like.  */
+      if (fn)	
+	fn = decl_function_context (fn);
 
-      fn = decl_function_context (fn);
       if (fn)
 	dwarf2out_abstract_function (fn);
     }
Index: testsuite/gcc.dg/pr19345.c
===================================================================
RCS file: testsuite/gcc.dg/pr19345.c
diff -N testsuite/gcc.dg/pr19345.c
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ testsuite/gcc.dg/pr19345.c	27 Jan 2005 03:17:52 -0000
@@ -0,0 +1,13 @@
+/* We shouldn't crash trying to produce the inlined structure type die debug info.  */
+/* { dg-do compile } */
+/* { dg-options "-O1 -g" } */
+inline void bar(char a[], unsigned int l)
+{
+	asm volatile ("" :: "m" ( *(struct {char x[l]; } *)a));
+}
+
+void foo(void)
+{
+	bar (0, 0);
+}
+