re PR lto/46879 (ICE: in separate_decls_in_region_debug_bind, at…

re PR lto/46879 (ICE: in separate_decls_in_region_debug_bind, at tree-parloops.c:778 with -flto -ftree-parallelize-loops -gdwarf-3)

	PR lto/46879
	* lto-streamer-out.c (output_gimple_stmt): Never replace first
	GIMPLE_DEBUG argument with MEM_REF.

From-SVN: r167755

gcc/ChangeLog

 2010-12-13  Jakub Jelinek  <jakub@redhat.com>
 
+	PR lto/46879
+	* lto-streamer-out.c (output_gimple_stmt): Never replace first
+	GIMPLE_DEBUG argument with MEM_REF.
+
 	PR debug/46867
 	* var-tracking.c (emitted_notes, string_pointer_flags): Removed.
 	(emit_note_insn_var_location): Remove ENABLE_RTL_CHECKING verification.

gcc/lto-streamer-out.c

@@ -1759,8 +1759,9 @@ output_gimple_stmt (struct output_block *ob, gimple stmt)
 	  tree op = gimple_op (stmt, i);
 	  /* Wrap all uses of non-automatic variables inside MEM_REFs
 	     so that we do not have to deal with type mismatches on
-	     merged symbols during IL read in.  */
-	  if (op)
+	     merged symbols during IL read in.  The first operand
+	     of GIMPLE_DEBUG must be a decl, not MEM_REF, though.  */
+	  if (op && (i || !is_gimple_debug (stmt)))
 	    {
 	      tree *basep = &op;
 	      while (handled_component_p (*basep))