re PR debug/9039 (ICE, anonymous union, gen_decl_die, dwarf2out.c:11974)

        PR debug/9039
        * dwarf2out.c (gen_decl_die): Ignore frontend tree codes.

From-SVN: r64412

gcc/ChangeLog

 2003-03-15  Jason Merrill  <jason@redhat.com>
 
+	PR debug/9039
+	* dwarf2out.c (gen_decl_die): Ignore frontend tree codes.
+
 	PR debug/6387
 	* dwarf2out.c (dwarf2out_decl): If we're at -g1, just stick nested
 	function DIEs at toplevel.

gcc/dwarf2out.c

@@ -12194,6 +12194,9 @@ gen_decl_die (decl, context_die)
       break;
 
     default:
+      if ((int)TREE_CODE (decl) > NUM_TREE_CODES)
+	/* Probably some frontend-internal decl.  Assume we don't care.  */
+	break;
       abort ();
     }
 }

gcc/testsuite/g++.dg/debug/anonunion1.C

+// PR debug/9039
+// Verify that the debugging backends don't get confused by ALIAS_DECLs.
+
+int foo()
+{
+  union
+  {
+    int z;
+    unsigned int w;
+  };
+
+  w = 0;
+  return 0;
+}