[LTO][PATCH] Supporting multiple lto_out_decl_states.

["=?big5?b?RG91ZyBLd2FuICjD9q62vHcp?=" <dougkwan at google dot com>]

This patch adds support multiples lto_out_decl_states, which is
required by the WPA since it writes multiple output files.  It has
been tested on i686-unknown-linux-gnu and had not new regression.


2008-08-05  Doug Kwan  <dougkwan@google.com>

	* lto-function-out.c (create_output_block): Call
	lto_init_out_decl_buffer instead of allocating hash-table for
	local decls itself.
	(destroy_output_block): Call lto_destroy_out_decl_buffer instead of
	deallocating local decl hash-table and vector seperately.
	(output_local_decl_ref): Do not push NAME into local decls vector.
 	(output_local_var_decl): Adjust after moving field local_decls into
	local_decl_buffer.decls.
 	(output_local_decl): Same.
	(produce_asm): Same.
	* lto-tree-out.h (struct output_block): Move fields
	LOCAL_DECL_HASH_TABLES, NEXT_LOCAL_DECL_INDEX amd LOCAL_DECLS
	into a lto_out_decl_buffer field LOCAL_DECL_BUFFER.
	* passes.c (lto-header.h, lto-section-out.h): Include.
 	(ipa_write_summaries_1): Use an lto_out_decl_state for all
	summary passes.
	* lto-section-out.c (decl_state_stack): New.
	(lto_output_decl_index): Change to use an lto_out_decl_buffer
	as parameter instead of using separate hash-table and pointer to
	next index.  Create hash-table in BUFFER if table is not there.
	Also push NAME into decl vector in BUFFER if NAME is a new entry.
	(lto_output_field_decl_index): Adjust for change in
	lto_output_decl_index.
	(lto_output_fn_decl_index): Same.
	(lto_output_namespace_decl_index): Same.
	(lto_output_var_decl_index): Same.
	(lto_output_type_decl_index): Same.
	(lto_output_type_ref_index): Same.
	(lto_new_out_decl_state): New.
	(lto_delete_out_decl_state): New.
 	(lto_get_out_decl_state): Return the top of out decl state stack.
	(lto_push_out_decl_state): New.
	(lto_pop_out_decl_state): New.
	(produce_asm_for_decls): Adjust for change in fields of
	lto_out_decl_state.  Leave deallocation of current lto_out_decl_state
	to caller.
	* lto-section-out.h (lto_out_decl_buffer): New.
	(LTO_DECL_STREAM_FIELD_DECL, LTO_DECL_STREAM_FN_DECL,
	LTO_DECL_STREAM_VAR_DECL, LTO_DECL_STREAM_TYPE_DECL,
	LTO_DECL_STREAM_NAMESPACE_DECL, LTO_DECL_STREAM_TYPE,
	LTO_N_DECL_STREAMS): New enums for global stream indices.
	(lto_out_decl_state): Group all fields into an array of
	lto_out_decl_buffers.
	(lto_out_decl_state_ptr): New type used for lto_out_decl_buffer
	vector type and functions;
	(lto_init_out_decl_buffer): New inline.
	(lto_destroy_out_decl_buffer): Same.
	(lto_output_decl_index): Adjust parameters in prototype.
	(lto_new_out_decl_state): New prototype.
	(lto_delete_out_decl_state): Same.
	(lto_push_out_decl_state): Same.
	(lto_pop_out_decl_state): Same.

Attachment: patch.txt
Description: Text document