/* Data structures and declarations used for reading and writing
GIMPLE to a file stream.
- Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+ Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
Contributed by Doug Kwan <dougkwan@google.com>
This file is part of GCC.
#include "vec.h"
#include "vecprim.h"
#include "alloc-pool.h"
+#include "gcov-io.h"
/* Define when debugging the LTO streamer. This causes the writer
to output the numeric value for the memory address of the tree node
sections a '.' and the section type are appended. */
#define LTO_SECTION_NAME_PREFIX ".gnu.lto_"
-#define LTO_major_version 1
+#define LTO_major_version 2
#define LTO_minor_version 0
typedef unsigned char lto_decl_flags_t;
struct bitpack_d
{
- /* Total number of bits packed/unpacked so far. */
- size_t num_bits;
+ /* The position of the first unused or unconsumed bit in the word. */
+ unsigned pos;
- /* Values are stored contiguously, so there may be internal
- fragmentation (words with unused bits). Therefore, we need to
- keep track of the first available bit in the last word of the
- bitpack. */
- size_t first_unused_bit;
+ /* The current word we are (un)packing. */
+ bitpack_word_t word;
- /* Vector of words holding the packed values. */
- VEC(bitpack_word_t, heap) *values;
+ /* The lto_output_stream or the lto_input_block we are streaming to/from. */
+ void *stream;
};
/* Tags representing the various IL objects written to the bytecode file
LTO_type_ref,
LTO_const_decl_ref,
LTO_imported_decl_ref,
+ LTO_translation_unit_decl_ref,
LTO_global_decl_ref, /* Do not change. */
/* This tag must always be last. */
LTO_section_symtab,
LTO_section_opts,
LTO_section_cgraph_opt_sum,
+ LTO_section_inline_summary,
LTO_N_SECTION_TYPES /* Must be last. */
};
/* Node map to store entries into. */
alloc_pool node_map_entries;
- /* Next available slot in the nodes and offsets arrays. */
- unsigned next_slot;
-
/* The nodes pickled so far. */
VEC(tree,heap) *nodes;
-
- /* Offset into the stream where the nodes have been written. */
- VEC(unsigned,heap) *offsets;
};
/* Hash new name of renamed global declaration to its original name. */
htab_t GTY((skip)) renaming_hash_table;
+
+ /* Linked list used temporarily in reader */
+ struct lto_file_decl_data *next;
+
+ /* Sub ID for merged objects. */
+ unsigned id;
+
+ /* Symbol resolutions for this file */
+ VEC(ld_plugin_symbol_resolution_t,heap) * GTY((skip)) resolutions;
+
+ struct gcov_ctr_summary GTY((skip)) profile_info;
};
typedef struct lto_file_decl_data *lto_file_decl_data_ptr;
extern const char *lto_tag_name (enum LTO_tags);
extern bitmap lto_bitmap_alloc (void);
extern void lto_bitmap_free (bitmap);
-extern char *lto_get_section_name (int, const char *);
+extern char *lto_get_section_name (int, const char *, struct lto_file_decl_data *);
extern void print_lto_report (void);
-extern struct bitpack_d *bitpack_create (void);
-extern void bitpack_delete (struct bitpack_d *);
-extern void bp_pack_value (struct bitpack_d *, bitpack_word_t, unsigned);
-extern bitpack_word_t bp_unpack_value (struct bitpack_d *, unsigned);
extern bool lto_streamer_cache_insert (struct lto_streamer_cache_d *, tree,
- int *, unsigned *);
+ unsigned *);
extern bool lto_streamer_cache_insert_at (struct lto_streamer_cache_d *, tree,
- int);
+ unsigned);
+extern void lto_streamer_cache_append (struct lto_streamer_cache_d *, tree);
extern bool lto_streamer_cache_lookup (struct lto_streamer_cache_d *, tree,
- int *);
-extern tree lto_streamer_cache_get (struct lto_streamer_cache_d *, int);
+ unsigned *);
+extern tree lto_streamer_cache_get (struct lto_streamer_cache_d *, unsigned);
extern struct lto_streamer_cache_d *lto_streamer_cache_create (void);
extern void lto_streamer_cache_delete (struct lto_streamer_cache_d *);
extern void lto_streamer_init (void);
const char *);
extern void lto_input_constructors_and_inits (struct lto_file_decl_data *,
const char *);
-extern struct bitpack_d *lto_input_bitpack (struct lto_input_block *);
extern void lto_init_reader (void);
extern struct data_in *lto_data_in_create (struct lto_file_decl_data *,
const char *, unsigned,
VEC(ld_plugin_symbol_resolution_t,heap) *);
extern void lto_data_in_delete (struct data_in *);
+extern const char *lto_input_string (struct data_in *,
+ struct lto_input_block *);
+extern void lto_input_data_block (struct lto_input_block *, void *, size_t);
/* In lto-streamer-out.c */
extern struct output_block *create_output_block (enum lto_section_type);
extern void destroy_output_block (struct output_block *);
extern void lto_output_tree (struct output_block *, tree, bool);
-extern void lto_output_bitpack (struct lto_output_stream *, struct bitpack_d *);
extern void produce_asm (struct output_block *ob, tree fn);
+extern void lto_output_string (struct output_block *,
+ struct lto_output_stream *,
+ const char *);
+extern void lto_output_string_with_length (struct output_block *,
+ struct lto_output_stream *,
+ const char *,
+ unsigned int);
+void lto_output_decl_state_streams (struct output_block *,
+ struct lto_out_decl_state *);
+void lto_output_decl_state_refs (struct output_block *,
+ struct lto_output_stream *,
+ struct lto_out_decl_state *);
/* In lto-cgraph.c */
extern tree lto_symtab_prevailing_decl (tree decl);
extern enum ld_plugin_symbol_resolution lto_symtab_get_resolution (tree decl);
extern void lto_symtab_free (void);
+extern GTY(()) VEC(tree,gc) *lto_global_var_decls;
/* In lto-opts.c. */
-extern void lto_register_user_option (size_t, const char *, int, int);
+extern void lto_register_user_option (size_t, const char *, int, unsigned int);
extern void lto_read_file_options (struct lto_file_decl_data *);
extern void lto_write_options (void);
extern void lto_reissue_options (void);
DEFINE_DECL_STREAM_FUNCS (NAMESPACE_DECL, namespace_decl)
DEFINE_DECL_STREAM_FUNCS (LABEL_DECL, label_decl)
+/* Returns a new bit-packing context for bit-packing into S. */
+static inline struct bitpack_d
+bitpack_create (struct lto_output_stream *s)
+{
+ struct bitpack_d bp;
+ bp.pos = 0;
+ bp.word = 0;
+ bp.stream = (void *)s;
+ return bp;
+}
+
+/* Pack the NBITS bit sized value VAL into the bit-packing context BP. */
+static inline void
+bp_pack_value (struct bitpack_d *bp, bitpack_word_t val, unsigned nbits)
+{
+ bitpack_word_t word = bp->word;
+ int pos = bp->pos;
+ /* If val does not fit into the current bitpack word switch to the
+ next one. */
+ if (pos + nbits > BITS_PER_BITPACK_WORD)
+ {
+ lto_output_uleb128_stream ((struct lto_output_stream *) bp->stream, word);
+ word = val;
+ pos = nbits;
+ }
+ else
+ {
+ word |= val << pos;
+ pos += nbits;
+ }
+ bp->word = word;
+ bp->pos = pos;
+}
+
+/* Finishes bit-packing of BP. */
+static inline void
+lto_output_bitpack (struct bitpack_d *bp)
+{
+ lto_output_uleb128_stream ((struct lto_output_stream *) bp->stream,
+ bp->word);
+ bp->word = 0;
+ bp->pos = 0;
+}
+
+/* Returns a new bit-packing context for bit-unpacking from IB. */
+static inline struct bitpack_d
+lto_input_bitpack (struct lto_input_block *ib)
+{
+ struct bitpack_d bp;
+ bp.word = lto_input_uleb128 (ib);
+ bp.pos = 0;
+ bp.stream = (void *)ib;
+ return bp;
+}
+
+/* Unpacks NBITS bits from the bit-packing context BP and returns them. */
+static inline bitpack_word_t
+bp_unpack_value (struct bitpack_d *bp, unsigned nbits)
+{
+ bitpack_word_t mask, val;
+ int pos = bp->pos;
+
+ mask = (nbits == BITS_PER_BITPACK_WORD
+ ? (bitpack_word_t) -1
+ : ((bitpack_word_t) 1 << nbits) - 1);
+
+ /* If there are not continuous nbits in the current bitpack word
+ switch to the next one. */
+ if (pos + nbits > BITS_PER_BITPACK_WORD)
+ {
+ bp->word = val = lto_input_uleb128 ((struct lto_input_block *)bp->stream);
+ bp->pos = nbits;
+ return val & mask;
+ }
+ val = bp->word;
+ val >>= pos;
+ bp->pos = pos + nbits;
+
+ return val & mask;
+}
+
#endif /* GCC_LTO_STREAMER_H */
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