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https://github.com/jerryscript-project/jerryscript.git
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dc8ab27900
Add internal hash map of literal indexes: In this hash map key is pair of block number and literal's unique identifier in the block, and the value is a literal index that unique in the whole program. Block is a continues array of opcodes. So, bytecode is splitted into blocks. Each block has its own uid counter. To get literal index the interpreter looks up it in the hash map. Thus, now JS program is able to have more than 255 identifiers/string literals. The first 128 (0-127) uids are reserved for block's uid counter, the other 128 (128-255) are reserved for tmp variables.
150 lines
3.4 KiB
C
150 lines
3.4 KiB
C
/* Copyright 2014 Samsung Electronics Co., Ltd.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "globals.h"
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#include "serializer.h"
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#include "parser.h"
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#include "jerry-libc.h"
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#include "bytecode-data.h"
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#include "deserializer.h"
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#include "pretty-printer.h"
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static bool print_opcodes;
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void
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serializer_set_scope (scopes_tree new_scope)
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{
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current_scope = new_scope;
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}
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static uint16_t
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hash_function (void *raw_key)
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{
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lit_id_table_key *key = (lit_id_table_key *) raw_key;
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JERRY_ASSERT (bytecode_data.opcodes_count > 0);
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return (uint16_t) (key->oc + key->uid) & ((1u << CONFIG_LITERAL_HASH_TABLE_KEY_BITS) - 1);
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}
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void
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serializer_merge_scopes_into_bytecode (void)
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{
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JERRY_ASSERT (bytecode_data.lit_id_hash == null_hash);
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bytecode_data.opcodes_count = scopes_tree_count_opcodes (current_scope);
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bytecode_data.lit_id_hash = hash_table_init (sizeof (lit_id_table_key), sizeof (literal_index_t),
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1u << CONFIG_LITERAL_HASH_TABLE_KEY_BITS, hash_function,
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MEM_HEAP_ALLOC_LONG_TERM);
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bytecode_data.opcodes = scopes_tree_raw_data (current_scope, bytecode_data.lit_id_hash);
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}
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void
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serializer_dump_literals (const literal literals[], literal_index_t literals_count)
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{
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#ifdef JERRY_ENABLE_PP
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if (print_opcodes)
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{
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pp_literals (literals, literals_count);
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}
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#endif
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bytecode_data.literals_count = literals_count;
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bytecode_data.literals = literals;
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}
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void
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serializer_dump_op_meta (op_meta op)
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{
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JERRY_ASSERT (scopes_tree_opcodes_num (current_scope) < MAX_OPCODES);
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scopes_tree_add_op_meta (current_scope, op);
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#ifdef JERRY_ENABLE_PP
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if (print_opcodes)
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{
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pp_op_meta ((opcode_counter_t) (scopes_tree_opcodes_num (current_scope) - 1), op, false);
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}
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#endif
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}
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opcode_counter_t
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serializer_get_current_opcode_counter (void)
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{
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return scopes_tree_opcodes_num (current_scope);
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}
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opcode_counter_t
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serializer_count_opcodes_in_subscopes (void)
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{
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return (opcode_counter_t) (scopes_tree_count_opcodes (current_scope) - scopes_tree_opcodes_num (current_scope));
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}
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void
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serializer_set_writing_position (opcode_counter_t oc)
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{
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scopes_tree_set_opcodes_num (current_scope, oc);
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}
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void
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serializer_rewrite_op_meta (const opcode_counter_t loc, op_meta op)
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{
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scopes_tree_set_op_meta (current_scope, loc, op);
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#ifdef JERRY_ENABLE_PP
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if (print_opcodes)
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{
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pp_op_meta (loc, op, true);
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}
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#endif
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}
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void
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serializer_print_opcodes (void)
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{
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#ifdef JERRY_ENABLE_PP
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opcode_counter_t loc;
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if (!print_opcodes)
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{
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return;
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}
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__printf ("AFTER OPTIMIZER:\n");
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for (loc = 0; loc < bytecode_data.opcodes_count; loc++)
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{
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const op_meta opm = (op_meta)
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{
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.op = bytecode_data.opcodes[loc],
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.lit_id =
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{
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NOT_A_LITERAL
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}
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};
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pp_op_meta (loc, opm, false);
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}
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#endif
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}
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void
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serializer_init (bool show_opcodes)
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{
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current_scope = NULL;
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print_opcodes = show_opcodes;
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}
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void
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serializer_free (void)
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{
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}
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