passes.c (ipa_write_summaries): Only modify statements if body is in memory.

	* passes.c (ipa_write_summaries): Only modify statements if body
	is in memory.
	* cgraphunit.c (ipa_passes): Also produce intermeidate code when
	incrementally linking.
	(ipa_passes): Likewise.
	* lto-cgraph.c (lto_output_node): When incrementally linking do not
	pass down resolution info.
	* common.opt (flag_incremental_link): Update info.
	* gcc.c (plugin specs): Turn flinker-output=* to
	-plugin-opt=-linker-output-known
	* toplev.c (compile_file): Also cut compilation when doing incremental
	link.
	* flag-types. (enum lto_partition_model): Add
	LTO_LINKER_OUTPUT_NOLTOREL.
	(invoke.texi): Add -flinker-output docs.
	* ipa.c (symbol_table::remove_unreachable_nodes): Handle LTO incremental
	link same way as WPA; do not stream in dead initializers.

From-SVN: r260964

gcc/lto-streamer-out.c

@@ -2406,7 +2406,9 @@ lto_output (void)
 		}
 	      decl_state = lto_new_out_decl_state ();
 	      lto_push_out_decl_state (decl_state);
-	      if (gimple_has_body_p (node->decl) || !flag_wpa
+	      if (gimple_has_body_p (node->decl)
+		  || (!flag_wpa
+		      && flag_incremental_link != INCREMENTAL_LINK_LTO)
 		  /* Thunks have no body but they may be synthetized
 		     at WPA time.  */
 		  || DECL_ARGUMENTS (node->decl))
@@ -2438,7 +2440,8 @@ lto_output (void)
 	      decl_state = lto_new_out_decl_state ();
 	      lto_push_out_decl_state (decl_state);
 	      if (DECL_INITIAL (node->decl) != error_mark_node
-		  || !flag_wpa)
+		  || (!flag_wpa
+		      && flag_incremental_link != INCREMENTAL_LINK_LTO))
 		output_constructor (node);
 	      else
 		copy_function_or_variable (node);