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author | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
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committer | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
commit | 1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch) | |
tree | c607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/gcc/tree-streamer.h | |
parent | 283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff) | |
download | toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.gz toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.bz2 toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.zip |
Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/gcc/tree-streamer.h')
-rw-r--r-- | gcc-4.9/gcc/tree-streamer.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/tree-streamer.h b/gcc-4.9/gcc/tree-streamer.h new file mode 100644 index 000000000..2aca29a12 --- /dev/null +++ b/gcc-4.9/gcc/tree-streamer.h @@ -0,0 +1,120 @@ +/* Data structures and functions for streaming trees. + + Copyright (C) 2011-2014 Free Software Foundation, Inc. + Contributed by Diego Novillo <dnovillo@google.com> + +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/>. */ + +#ifndef GCC_TREE_STREAMER_H +#define GCC_TREE_STREAMER_H + +#include "streamer-hooks.h" +#include "lto-streamer.h" + +/* Cache of pickled nodes. Used to avoid writing the same node more + than once. The first time a tree node is streamed out, it is + entered in this cache. Subsequent references to the same node are + resolved by looking it up in this cache. + + This is used in two ways: + + - On the writing side, the first time T is added to STREAMER_CACHE, + a new reference index is created for T and T is emitted on the + stream. If T needs to be emitted again to the stream, instead of + pickling it again, the reference index is emitted. + + - On the reading side, the first time T is read from the stream, it + is reconstructed in memory and a new reference index created for + T. The reconstructed T is inserted in some array so that when + the reference index for T is found in the input stream, it can be + used to look up into the array to get the reconstructed T. */ + +struct streamer_tree_cache_d +{ + /* The mapping between tree nodes and slots into the nodes array. */ + pointer_map<unsigned> *node_map; + + /* The nodes pickled so far. */ + vec<tree> nodes; + /* The node hashes (if available). */ + vec<hashval_t> hashes; +}; + +/* Return true if tree node EXPR should be streamed as a builtin. For + these nodes, we just emit the class and function code. */ +static inline bool +streamer_handle_as_builtin_p (tree expr) +{ + return (TREE_CODE (expr) == FUNCTION_DECL + && DECL_IS_BUILTIN (expr) + && (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_NORMAL + || DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD)); +} + +/* In tree-streamer-in.c. */ +tree streamer_read_string_cst (struct data_in *, struct lto_input_block *); +tree streamer_read_chain (struct lto_input_block *, struct data_in *); +tree streamer_alloc_tree (struct lto_input_block *, struct data_in *, + enum LTO_tags); +void streamer_read_tree_body (struct lto_input_block *, struct data_in *, tree); +tree streamer_get_pickled_tree (struct lto_input_block *, struct data_in *); +tree streamer_get_builtin_tree (struct lto_input_block *, struct data_in *); +struct bitpack_d streamer_read_tree_bitfields (struct lto_input_block *, + struct data_in *, tree); + +/* In tree-streamer-out.c. */ +void streamer_write_string_cst (struct output_block *, + struct lto_output_stream *, tree); +void streamer_write_chain (struct output_block *, tree, bool); +void streamer_write_tree_header (struct output_block *, tree); +void streamer_pack_tree_bitfields (struct output_block *, struct bitpack_d *, + tree); +void streamer_write_tree_body (struct output_block *, tree, bool); +void streamer_write_integer_cst (struct output_block *, tree, bool); +void streamer_write_builtin (struct output_block *, tree); + +/* In tree-streamer.c. */ +void streamer_check_handled_ts_structures (void); +bool streamer_tree_cache_insert (struct streamer_tree_cache_d *, tree, + hashval_t, unsigned *); +void streamer_tree_cache_replace_tree (struct streamer_tree_cache_d *, tree, + unsigned); +void streamer_tree_cache_append (struct streamer_tree_cache_d *, tree, + hashval_t); +bool streamer_tree_cache_lookup (struct streamer_tree_cache_d *, tree, + unsigned *); +struct streamer_tree_cache_d *streamer_tree_cache_create (bool, bool); +void streamer_tree_cache_delete (struct streamer_tree_cache_d *); + +/* Return the tree node at slot IX in CACHE. */ + +static inline tree +streamer_tree_cache_get_tree (struct streamer_tree_cache_d *cache, unsigned ix) +{ + return cache->nodes[ix]; +} + +/* Return the tree hash value at slot IX in CACHE. */ + +static inline hashval_t +streamer_tree_cache_get_hash (struct streamer_tree_cache_d *cache, unsigned ix) +{ + return cache->hashes[ix]; +} + + +#endif /* GCC_TREE_STREAMER_H */ |