Improve the performance of the interpreter. (#3344)

Registers are stored immediately after the frame pointer and an argument is dropped from vm_run.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

jerry-core/vm/vm-defines.h

@@ -43,13 +43,10 @@ typedef struct vm_frame_ctx_t
   const ecma_compiled_code_t *bytecode_header_p;      /**< currently executed byte-code data */
   uint8_t *byte_code_p;                               /**< current byte code pointer */
   uint8_t *byte_code_start_p;                         /**< byte code start pointer */
-  ecma_value_t *registers_p;                          /**< register start pointer */
   ecma_value_t *stack_top_p;                          /**< stack top pointer */
   ecma_value_t *literal_start_p;                      /**< literal list start pointer */
   ecma_object_t *lex_env_p;                           /**< current lexical environment */
-#if defined (JERRY_DEBUGGER) || ENABLED (JERRY_LINE_INFO)
   struct vm_frame_ctx_t *prev_context_p;              /**< previous context */
-#endif /* defined (JERRY_DEBUGGER) || ENABLED (JERRY_LINE_INFO) */
   ecma_value_t this_binding;                          /**< this binding */
   ecma_value_t block_result;                          /**< block result */
 #if ENABLED (JERRY_LINE_INFO) || ENABLED (JERRY_ES2015_MODULE_SYSTEM)
@@ -61,8 +58,19 @@ typedef struct vm_frame_ctx_t
   uint16_t context_depth;                             /**< current context depth */
   uint8_t is_eval_code;                               /**< eval mode flag */
   uint8_t call_operation;                             /**< perform a call or construct operation */
+  /* Registers start immediately after the frame context. */
 } vm_frame_ctx_t;
 
+/**
+ * Get register list corresponding to the frame context.
+ */
+#define VM_GET_REGISTERS(frame_ctx_p) ((ecma_value_t *) (frame_ctx_p + 1))
+
+/**
+ * Read or write a specific register.
+ */
+#define VM_GET_REGISTER(frame_ctx_p, i) (((ecma_value_t *) (frame_ctx_p + 1))[i])
+
 /**
  * @}
  * @}