#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tree.h"
#include "gimple.h"
#include "streamer-hooks.h"
#include "tree-streamer.h"

Include dependency graph for tree-streamer.c:

Functions
void	streamer_check_handled_ts_structures ()
static void	streamer_tree_cache_add_to_node_array (struct streamer_tree_cache_d *cache, unsigned ix, tree t, hashval_t hash)
static bool	streamer_tree_cache_insert_1 (struct streamer_tree_cache_d cache, tree t, hashval_t hash, unsigned ix_p, bool insert_at_next_slot_p)
bool	streamer_tree_cache_insert (struct streamer_tree_cache_d cache, tree t, hashval_t hash, unsigned ix_p)
void	streamer_tree_cache_replace_tree (struct streamer_tree_cache_d *cache, tree t, unsigned ix)
void	streamer_tree_cache_append (struct streamer_tree_cache_d *cache, tree t, hashval_t hash)
bool	streamer_tree_cache_lookup (struct streamer_tree_cache_d cache, tree t, unsigned ix_p)
static void	record_common_node ()
static void	preload_common_nodes ()
struct streamer_tree_cache_d *	streamer_tree_cache_create ()
void	streamer_tree_cache_delete ()

Function Documentation

static void preload_common_nodes ( )

static

Preload common nodes into CACHE and make sure they are merged properly according to the gimple type table.

Skip itk_char. char_type_node is dependent on -f[un]signed-char.

   Skip boolean type and constants, they are frontend dependent.

References cache, streamer_tree_cache_d::hashes, streamer_tree_cache_d::node_map, and streamer_tree_cache_d::nodes.

static void record_common_node ( )

static

Record NODE in CACHE.

 If we recursively end up at nodes we do not want to preload simply don't.
 ???  We'd want to verify that this doesn't happen, or alternatively
 do not recurse at all.

 We have to make sure to fill exactly the same number of
 elements for all frontends.  That can include NULL trees.
 As our hash table can't deal with zero entries we'll simply stream
 a random other tree.  A NULL tree never will be looked up so it
 doesn't matter which tree we replace it with, just to be sure
 use error_mark_node.

 ???  FIXME, devise a better hash value.  But the hash needs to be equal
 for all frontend and lto1 invocations.  So just use the position
 in the cache as hash value.

     The FIELD_DECLs of structures should be shared, so that every
     COMPONENT_REF uses the same tree node when referencing a field.
     Pointer equality between FIELD_DECLs is used by the alias
     machinery to compute overlapping component references (see
     nonoverlapping_component_refs_p and
     nonoverlapping_component_refs_of_decl_p).

References TREE_CHAIN, and TYPE_FIELDS.

void streamer_check_handled_ts_structures ( void )

Miscellaneous utilities for tree streaming. Things that are used in both input and output are here.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see http://www.gnu.org/licenses/. Check that all the TS_* structures handled by the streamer_write_* and streamer_read_* routines are exactly ALL the structures defined in treestruct.def.

These are the TS_* structures that are either handled or explicitly ignored by the streamer routines.

 Anything not marked above will trigger the following assertion.
 If this assertion triggers, it means that there is a new TS_*
 structure that should be handled by the streamer.

static void streamer_tree_cache_add_to_node_array	(	struct streamer_tree_cache_d *	cache,
		unsigned	ix,
		tree	t,
		hashval_t	hash
	)

static

Helper for streamer_tree_cache_insert_1. Add T to CACHE->NODES at slot IX.

Make sure we're either replacing an old element or appending consecutively.

References streamer_tree_cache_d::hashes, and streamer_tree_cache_d::nodes.

Referenced by streamer_tree_cache_insert(), and streamer_tree_cache_replace_tree().

void streamer_tree_cache_append	(	struct streamer_tree_cache_d *	cache,
		tree	t,
		hashval_t	hash
	)

Appends tree node T to CACHE, even if T already existed in it.

References pointer_map< T >::contains(), gcc_assert, streamer_tree_cache_d::node_map, and NULL.

Referenced by lto_read_tree_1().

struct streamer_tree_cache_d* streamer_tree_cache_create ( )

read

Create a cache of pickled nodes.

Load all the well-known tree nodes that are always created by the compiler on startup. This prevents writing them out unnecessarily.

References streamer_tree_cache_d::hashes, streamer_tree_cache_d::node_map, streamer_tree_cache_d::nodes, and NULL.

void streamer_tree_cache_delete ( )

Delete the streamer cache C.

bool streamer_tree_cache_insert	(	struct streamer_tree_cache_d *	cache,
		tree	t,
		hashval_t	hash,
		unsigned *	ix_p
	)

Insert tree node T in CACHE. If T already existed in the cache return true. Otherwise, return false.

If IX_P is non-null, update it with the index into the cache where T has been stored.

References streamer_tree_cache_d::hashes, streamer_tree_cache_d::node_map, streamer_tree_cache_add_to_node_array(), streamer_tree_cache_get_hash(), and streamer_tree_cache_insert_1().

Referenced by lto_write_tree().

static bool streamer_tree_cache_insert_1	(	struct streamer_tree_cache_d *	cache,
		tree	t,
		hashval_t	hash,
		unsigned *	ix_p,
		bool	insert_at_next_slot_p
	)

static

Helper for streamer_tree_cache_insert and streamer_tree_cache_insert_at. CACHE, T, and IX_P are as in streamer_tree_cache_insert.

If INSERT_AT_NEXT_SLOT_P is true, T is inserted at the next available slot in the cache. Otherwise, T is inserted at the position indicated in *IX_P.

If T already existed in CACHE, return true. Otherwise, return false.

Determine the next slot to use in the cache.

         If the caller wants to insert T at a specific slot
         location, and ENTRY->TO does not match *IX_P, add T to
         the requested location slot.

Referenced by streamer_tree_cache_insert(), and streamer_tree_cache_replace_tree().

bool streamer_tree_cache_lookup	(	struct streamer_tree_cache_d *	cache,
		tree	t,
		unsigned *	ix_p
	)

Return true if tree node T exists in CACHE, otherwise false. If IX_P is not NULL, write to *IX_P the index into the cache where T is stored ((unsigned)-1 if T is not found).

Referenced by lto_output().

void streamer_tree_cache_replace_tree	(	struct streamer_tree_cache_d *	cache,
		tree	t,
		unsigned	ix
	)

Replace the tree node with T in CACHE at slot IX.

References streamer_tree_cache_d::node_map, streamer_tree_cache_d::nodes, streamer_tree_cache_add_to_node_array(), and streamer_tree_cache_insert_1().

Functions

Function Documentation