Split out LTO's writing of top level asm nodes in preparation of extending

what needs to be written out when top level asm-s get enhanced to accept a
limited set of input operands.

gcc/
2011-09-30  Jan Beulich  <jbeulich@suse.com>

	* lto-cgraph.c (output_cgraph): Remove processing of
	'cgraph_asm_nodes', call lto_output_toplevel_asms() instead.
	(input_cgraph_1): Remove loop calling cgraph_add_asm_node(), call
	lto_input_toplevel_asms() instead.
	* lto-section-in.c (lto_section_name): Add "asm" entry.
	* lto-streamer-in.c (lto_input_toplevel_asms): New.
	* lto-streamer-out.c (lto_output_toplevel_asms): New.
	* lto-streamer.h (LTO_minor_version): Bump.
	(enum lto_section_type): Add LTO_section_asm.
	(struct lto_asm_header): New.
	(lto_input_toplevel_asms, lto_output_toplevel_asms): Declare.
	* tree-streamer.h (streamer_write_string_cst): Declare.
	* tree-streamer-out.c (write_string_cst): Rename to
	streamer_write_string_cst and make global. Handle incoming string
	being NULL.
	(streamer_write_tree_header): Adjust call to renamed function.


git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@179386 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 41 insertions, 0 deletions

diff --git a/gcc/lto-streamer-in.c b/gcc/lto-streamer-in.c
index bae21d5bc4a..ef972cab1d0 100644
--- a/gcc/lto-streamer-in.c
+++ b/gcc/lto-streamer-in.c
@@ -1141,6 +1141,47 @@ lto_input_tree (struct lto_input_block *ib, struct data_in *data_in)
 }
 
 
+/* Input toplevel asms.  */
+
+void
+lto_input_toplevel_asms (struct lto_file_decl_data *file_data)
+{
+  size_t len;
+  const char *data = lto_get_section_data (file_data, LTO_section_asm,
+					   NULL, &len);
+  const struct lto_asm_header *header = (const struct lto_asm_header *) data;
+  int32_t string_offset;
+  struct data_in *data_in;
+  struct lto_input_block ib;
+  tree str;
+
+  if (! data)
+    return;
+
+  string_offset = sizeof (*header) + header->main_size;
+
+  LTO_INIT_INPUT_BLOCK (ib,
+			data + sizeof (*header),
+			0,
+			header->main_size);
+
+  data_in = lto_data_in_create (file_data, data + string_offset,
+				header->string_size, NULL);
+
+  /* Make sure the file was generated by the exact same compiler.  */
+  lto_check_version (header->lto_header.major_version,
+		     header->lto_header.minor_version);
+
+  while ((str = streamer_read_string_cst (data_in, &ib)))
+    cgraph_add_asm_node (str);
+
+  clear_line_info (data_in);
+  lto_data_in_delete (data_in);
+
+  lto_free_section_data (file_data, LTO_section_asm, NULL, data, len);
+}
+
+
 /* Initialization for the LTO reader.  */
 
 void