cgraph.c (cgraph_node::get_untransformed_body): Pass compressed flag to lto_get_section_data.

	* cgraph.c (cgraph_node::get_untransformed_body): Pass compressed
	flag to lto_get_section_data.
	* varpool.c (varpool_node::get_constructor): Likewise.
	* lto-section-in.c (lto_get_section_data): Add new flag decompress.
	(lto_free_section_data): Likewise.
	(lto_get_raw_section_data): New function.
	(lto_free_raw_section_data): New function.
	(copy_function_or_variable): Copy sections w/o decompressing.
	(lto_output_decl_state_refs): Picke compressed bit.
	* lto-streamer.h (lto_in_decl_state): New flag compressed.
	(lto_out_decl_state): Likewise.
	(lto_get_section_data, lto_free_section_data): Update prototypes
	(lto_get_raw_section_data, lto_free_raw_section_data): Declare.
	(lto_write_raw_data): Declare.
	(lto_begin_section): Remove FIXME.
	(lto_write_raw_data): New function.
	(lto_write_stream): Remove FIXME.
	(lto_new_out_decl_state): Set compressed flag.

From-SVN: r231594

gcc/lto-section-out.c

@@ -66,9 +66,6 @@ lto_begin_section (const char *name, bool compress)
 {
   lang_hooks.lto.begin_section (name);
 
-  /* FIXME lto: for now, suppress compression if the lang_hook that appends
-     data is anything other than assembler output.  The effect here is that
-     we get compression of IL only in non-ltrans object files.  */
   gcc_assert (compression_stream == NULL);
   if (compress)
     compression_stream = lto_start_compression (lto_append_data, NULL);
@@ -99,6 +96,14 @@ lto_write_data (const void *data, unsigned int size)
     lang_hooks.lto.append_data ((const char *)data, size, NULL);
 }
 
+/* Write SIZE bytes starting at DATA to the assembler.  */
+
+void
+lto_write_raw_data (const void *data, unsigned int size)
+{
+  lang_hooks.lto.append_data ((const char *)data, size, NULL);
+}
+
 /* Write all of the chars in OBS to the assembler.  Recycle the blocks
    in obs as this is being done.  */
 
@@ -123,10 +128,6 @@ lto_write_stream (struct lto_output_stream *obs)
       if (!next_block)
 	num_chars -= obs->left_in_block;
 
-      /* FIXME lto: WPA mode uses an ELF function as a lang_hook to append
-         output data.  This hook is not happy with the way that compression
-         blocks up output differently to the way it's blocked here.  So for
-         now, we don't compress WPA output.  */
       if (compression_stream)
 	lto_compress_block (compression_stream, base, num_chars);
       else
@@ -295,6 +296,9 @@ lto_new_out_decl_state (void)
   for (i = 0; i < LTO_N_DECL_STREAMS; i++)
     lto_init_tree_ref_encoder (&state->streams[i]);
 
+  /* At WPA time we do not compress sections by default.  */
+  state->compressed = !flag_wpa;
+
   return state;
 }
 

gcc/lto-streamer-out.c

@@ -2191,22 +2191,23 @@ copy_function_or_variable (struct symtab_node *node)
   struct lto_in_decl_state *in_state;
   struct lto_out_decl_state *out_state = lto_get_out_decl_state ();
 
-  lto_begin_section (section_name, !flag_wpa);
+  lto_begin_section (section_name, false);
   free (section_name);
 
   /* We may have renamed the declaration, e.g., a static function.  */
   name = lto_get_decl_name_mapping (file_data, name);
 
-  data = lto_get_section_data (file_data, LTO_section_function_body,
-                               name, &len);
+  data = lto_get_raw_section_data (file_data, LTO_section_function_body,
+                                   name, &len);
   gcc_assert (data);
 
   /* Do a bit copy of the function body.  */
-  lto_write_data (data, len);
+  lto_write_raw_data (data, len);
 
   /* Copy decls. */
   in_state =
     lto_get_function_in_decl_state (node->lto_file_data, function);
+  out_state->compressed = in_state->compressed;
   gcc_assert (in_state);
 
   for (i = 0; i < LTO_N_DECL_STREAMS; i++)
@@ -2224,8 +2225,8 @@ copy_function_or_variable (struct symtab_node *node)
 	encoder->trees.safe_push ((*trees)[j]);
     }
 
-  lto_free_section_data (file_data, LTO_section_function_body, name,
-			 data, len);
+  lto_free_raw_section_data (file_data, LTO_section_function_body, name,
+			     data, len);
   lto_end_section ();
 }
 
@@ -2431,6 +2432,7 @@ lto_output_decl_state_refs (struct output_block *ob,
   decl = (state->fn_decl) ? state->fn_decl : void_type_node;
   streamer_tree_cache_lookup (ob->writer_cache, decl, &ref);
   gcc_assert (ref != (unsigned)-1);
+  ref = ref * 2 + (state->compressed ? 1 : 0);
   lto_write_data (&ref, sizeof (uint32_t));
 
   for (i = 0;  i < LTO_N_DECL_STREAMS; i++)