Parser optimizations.

- parser is now non-recursive (i.e. parse function is not called recursively in any case);
 - byte-code is now more compact:
    - constants are now not immediately dumped upon occurence, but later - where necessary;
    - assignments are combined with unary / binary operations;
    - binary operations are encoded more compactly in many cases;
 - byte-code arrays are now allocated separately for each scope (so, GC of the scopes now becomes possible);
 - byte-code is dumped directly into corresponding byte-code arrays:
   - linked lists of op_meta are not now used for main code of a scope.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
JerryScript-DCO-1.0-Signed-off-by: Andrey Shitov a.shitov@samsung.com

jerry-core/ecma/base/ecma-globals.h

@@ -795,6 +795,8 @@ FIXME (Move to library that should define the type (literal.h /* ? */))
 typedef rcs_record_t *literal_t;
 typedef rcs_cpointer_t lit_cpointer_t;
 
+#define NOT_A_LITERAL (lit_cpointer_t::null_cp ())
+
 /**
  * ECMA string-value descriptor
  */

jerry-core/ecma/base/ecma-helpers-string.cpp

@@ -20,6 +20,7 @@
  * @{
  */
 
+#include "bytecode-data.h"
 #include "ecma-alloc.h"
 #include "ecma-gc.h"
 #include "ecma-globals.h"
@@ -29,7 +30,6 @@
 #include "jrt-libc-includes.h"
 #include "lit-char-helpers.h"
 #include "lit-magic-strings.h"
-#include "serializer.h"
 #include "vm.h"
 
 /**

jerry-core/ecma/builtin-objects/ecma-builtin-function.cpp

@@ -21,7 +21,6 @@
 #include "ecma-function-object.h"
 #include "ecma-lex-env.h"
 #include "ecma-try-catch-macro.h"
-#include "serializer.h"
 #include "lit-magic-strings.h"
 #include "parser.h"
 

jerry-core/ecma/operations/ecma-eval.cpp

@@ -13,6 +13,7 @@
  * limitations under the License.
  */
 
+#include "bytecode-data.h"
 #include "ecma-builtins.h"
 #include "ecma-exceptions.h"
 #include "ecma-eval.h"
@@ -21,7 +22,6 @@
 #include "ecma-helpers.h"
 #include "ecma-lex-env.h"
 #include "parser.h"
-#include "serializer.h"
 #include "vm.h"
 
 /** \addtogroup ecma ECMA
@@ -114,7 +114,7 @@ ecma_op_eval_chars_buffer (const jerry_api_char_t *code_p, /**< code characters
 
     if (!code_contains_functions)
     {
-      serializer_remove_bytecode_data (bytecode_data_p);
+      bc_remove_bytecode_data (bytecode_data_p);
     }
   }
 

jerry-core/ecma/operations/ecma-function-object.cpp

@@ -13,6 +13,7 @@
  * limitations under the License.
  */
 
+#include "bytecode-data.h"
 #include "ecma-alloc.h"
 #include "ecma-builtin-helpers.h"
 #include "ecma-builtins.h"
@@ -255,15 +256,14 @@ ecma_op_create_function_object (ecma_collection_header_t *formal_params_collecti
   bool is_no_lex_env = false;
 
   vm_instr_counter_t instr_pos = first_instr_pos;
-  opcode_scope_code_flags_t scope_flags = vm_get_scope_flags (bytecode_header_p, instr_pos++);
 
-  if (scope_flags & OPCODE_SCOPE_CODE_FLAGS_STRICT)
+  if (bytecode_header_p->is_strict)
   {
     is_strict_mode_code = true;
   }
 
-  if ((scope_flags & OPCODE_SCOPE_CODE_FLAGS_NOT_REF_ARGUMENTS_IDENTIFIER)
-      && (scope_flags & OPCODE_SCOPE_CODE_FLAGS_NOT_REF_EVAL_IDENTIFIER))
+  if (!bytecode_header_p->is_ref_arguments_identifier
+      && !bytecode_header_p->is_ref_eval_identifier)
   {
     /* the code doesn't use 'arguments' identifier
      * and doesn't perform direct call to eval,
@@ -271,12 +271,12 @@ ecma_op_create_function_object (ecma_collection_header_t *formal_params_collecti
     do_instantiate_arguments_object = false;
   }
 
-  if (scope_flags & OPCODE_SCOPE_CODE_FLAGS_ARGUMENTS_ON_REGISTERS)
+  if (bytecode_header_p->is_args_moved_to_regs)
   {
     is_arguments_moved_to_regs = true;
   }
 
-  if (scope_flags & OPCODE_SCOPE_CODE_FLAGS_NO_LEX_ENV)
+  if (bytecode_header_p->is_no_lex_env)
   {
     is_no_lex_env = true;
   }