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/vm/opcodes-helpers-variables.cpp

@@ -13,6 +13,7 @@
  * limitations under the License.
  */
 
+#include "bytecode-data.h"
 #include "opcodes-ecma-support.h"
 
 #ifndef JERRY_NDEBUG
@@ -89,9 +90,9 @@ get_variable_value (vm_frame_ctx_t *frame_ctx_p, /**< interpreter context */
   else
   {
     ecma_string_t var_name_string;
-    lit_cpointer_t lit_cp = serializer_get_literal_cp_by_uid (var_idx,
-                                                              frame_ctx_p->bytecode_header_p,
-                                                              frame_ctx_p->pos);
+    lit_cpointer_t lit_cp = bc_get_literal_cp_by_uid (var_idx,
+                                                      frame_ctx_p->bytecode_header_p,
+                                                      frame_ctx_p->pos);
     JERRY_ASSERT (lit_cp.packed_value != MEM_CP_NULL);
     ecma_new_ecma_string_on_stack_from_lit_cp (&var_name_string, lit_cp);
 
@@ -155,7 +156,7 @@ set_variable_value (vm_frame_ctx_t *frame_ctx_p, /**< interpreter context */
   else
   {
     ecma_string_t var_name_string;
-    lit_cpointer_t lit_cp = serializer_get_literal_cp_by_uid (var_idx, frame_ctx_p->bytecode_header_p, lit_oc);
+    lit_cpointer_t lit_cp = bc_get_literal_cp_by_uid (var_idx, frame_ctx_p->bytecode_header_p, lit_oc);
     JERRY_ASSERT (lit_cp.packed_value != MEM_CP_NULL);
     ecma_new_ecma_string_on_stack_from_lit_cp (&var_name_string, lit_cp);