Add an abstraction over a compiled code.

That's just step 1, moving code-related functions of ArtMethod to
another class. That class is only a wrapper on an ArtMethod, but will
be changed to be a wrapper around compiled code.

Change-Id: I6f35fc06d37220558dff61691e51ae20066b0dd6
diff --git a/runtime/check_reference_map_visitor.h b/runtime/check_reference_map_visitor.h
index 7965cd7..e897351 100644
--- a/runtime/check_reference_map_visitor.h
+++ b/runtime/check_reference_map_visitor.h
@@ -17,6 +17,7 @@
 #ifndef ART_RUNTIME_CHECK_REFERENCE_MAP_VISITOR_H_
 #define ART_RUNTIME_CHECK_REFERENCE_MAP_VISITOR_H_
 
+#include "art_code.h"
 #include "art_method-inl.h"
 #include "gc_map.h"
 #include "scoped_thread_state_change.h"
@@ -53,7 +54,7 @@
 
   void CheckReferences(int* registers, int number_of_references, uint32_t native_pc_offset)
       SHARED_REQUIRES(Locks::mutator_lock_) {
-    if (GetMethod()->IsOptimized(sizeof(void*))) {
+    if (GetCurrentCode().IsOptimized(sizeof(void*))) {
       CheckOptimizedMethod(registers, number_of_references, native_pc_offset);
     } else {
       CheckQuickMethod(registers, number_of_references, native_pc_offset);
@@ -64,7 +65,7 @@
   void CheckOptimizedMethod(int* registers, int number_of_references, uint32_t native_pc_offset)
       SHARED_REQUIRES(Locks::mutator_lock_) {
     ArtMethod* m = GetMethod();
-    CodeInfo code_info = m->GetOptimizedCodeInfo();
+    CodeInfo code_info = GetCurrentCode().GetOptimizedCodeInfo();
     StackMapEncoding encoding = code_info.ExtractEncoding();
     StackMap stack_map = code_info.GetStackMapForNativePcOffset(native_pc_offset, encoding);
     uint16_t number_of_dex_registers = m->GetCodeItem()->registers_size_;
@@ -108,7 +109,7 @@
   void CheckQuickMethod(int* registers, int number_of_references, uint32_t native_pc_offset)
       SHARED_REQUIRES(Locks::mutator_lock_) {
     ArtMethod* m = GetMethod();
-    NativePcOffsetToReferenceMap map(m->GetNativeGcMap(sizeof(void*)));
+    NativePcOffsetToReferenceMap map(GetCurrentCode().GetNativeGcMap(sizeof(void*)));
     const uint8_t* ref_bitmap = map.FindBitMap(native_pc_offset);
     CHECK(ref_bitmap);
     for (int i = 0; i < number_of_references; ++i) {