Create per-descriptor-index LoadApiGetterStub

src/code-stubs.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 123 matching lines @@
   V(StringNotEqual)                         \
   V(StringLessThan)                         \
   V(StringLessThanOrEqual)                  \
   V(StringGreaterThan)                      \
   V(StringGreaterThanOrEqual)               \
   V(ToBoolean)                              \
   V(ToInteger)                              \
   V(ToLength)                               \
   /* IC Handler stubs */                    \
   V(ArrayBufferViewLoadField)               \
-  V(LoadConstant)                           \
   V(LoadFastElement)                        \
   V(LoadField)                              \
+  V(LoadConstant)                           \

[Jakob Kummerow, 2016/04/19 08:17:20]

nit: why not maintain alphabetic ordering?

+  V(LoadApiGetter)                          \
   V(LoadIndexedInterceptor)                 \
   V(KeyedLoadSloppyArguments)               \
   V(KeyedStoreSloppyArguments)              \
   V(StoreField)                             \
   V(StoreInterceptor)                       \
   V(StoreGlobal)                            \
   V(StoreTransition)
 
 // List of code stubs only used on ARM 32 bits platforms.
 #if V8_TARGET_ARCH_ARM
@@ skipping 1295 matching lines @@
 
  protected:
   Code::Kind kind() const override { return Code::LOAD_IC; }
 
  private:
   class ConstantIndexBits : public BitField<int, 0, kSubMinorKeyBits> {};
 
   DEFINE_HANDLER_CODE_STUB(LoadConstant, HandlerStub);
 };
 
+class LoadApiGetterStub : public TurboFanCodeStub {
+ public:
+  LoadApiGetterStub(Isolate* isolate, bool receiver_is_holder, int index)
+      : TurboFanCodeStub(isolate) {
+    minor_key_ = IndexBits::encode(index) |
+                 ReceiverIsHolderBits::encode(receiver_is_holder);
+  }
+
+  Code::Kind GetCodeKind() const override { return Code::HANDLER; }
+  ExtraICState GetExtraICState() const override { return Code::LOAD_IC; }
+  InlineCacheState GetICState() const override { return MONOMORPHIC; }
+
+  int index() const { return IndexBits::decode(minor_key_); }
+  bool receiver_is_holder() const {
+    return ReceiverIsHolderBits::decode(minor_key_);
+  }
+
+ private:
+  class ReceiverIsHolderBits : public BitField<bool, 0, 1> {};
+  class IndexBits : public BitField<int, 1, kDescriptorIndexBitCount> {};
+
+  DEFINE_CALL_INTERFACE_DESCRIPTOR(Load);
+  DEFINE_TURBOFAN_CODE_STUB(LoadApiGetter, TurboFanCodeStub);
+};
 
 class StoreFieldStub : public HandlerStub {
  public:
   StoreFieldStub(Isolate* isolate, FieldIndex index,
                  Representation representation)
       : HandlerStub(isolate) {
     int property_index_key = index.GetFieldAccessStubKey();
     uint8_t repr = PropertyDetails::EncodeRepresentation(representation);
     set_sub_minor_key(StoreFieldByIndexBits::encode(property_index_key) |
                       RepresentationBits::encode(repr));
@@ skipping 1691 matching lines @@
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 
 extern Representation RepresentationFromType(Type* type);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODE_STUBS_H_