[ic] Remove deprecated LoadConstantStub and other related dead code

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 49 matching lines @@
   V(StubFailureTrampoline)                    \
   /* These are only called from FCG */        \
   /* They can be removed when only the TF  */ \
   /* version of the corresponding stub is  */ \
   /* used universally */                      \
   V(CallICTrampoline)                         \
   /* --- HydrogenCodeStubs --- */             \
   /* These will be ported/eliminated */       \
   /* as part of the new IC system, ask */     \
   /* ishell before doing anything  */         \
-  V(LoadConstant)                             \
   V(LoadField)                                \
   /* These should never be ported to TF */    \
   /* because they are either used only by */  \
   /* FCG/Crankshaft or are deprecated */      \
   V(BinaryOpIC)                               \
   V(BinaryOpWithAllocationSite)               \
   V(ToBooleanIC)                              \
   V(TransitionElementsKind)                   \
   /* --- TurboFanCodeStubs --- */             \
   V(AllocateHeapNumber)                       \
@@ skipping 1141 matching lines @@
   }
 
   Code::Kind GetCodeKind() const override { return Code::HANDLER; }
   ExtraICState GetExtraICState() const override { return Code::STORE_IC; }
 
  protected:
   DEFINE_CALL_INTERFACE_DESCRIPTOR(StoreWithVector);
   DEFINE_TURBOFAN_CODE_STUB(KeyedStoreSloppyArguments, TurboFanCodeStub);
 };
 
-
-class LoadConstantStub : public HandlerStub {
- public:
-  LoadConstantStub(Isolate* isolate, int constant_index)
-      : HandlerStub(isolate) {
-    set_sub_minor_key(ConstantIndexBits::encode(constant_index));
-  }
-
-  int constant_index() const {
-    return ConstantIndexBits::decode(sub_minor_key());
-  }
-
- protected:
-  Code::Kind kind() const override { return Code::LOAD_IC; }
-
- private:
-  class ConstantIndexBits : public BitField<int, 0, kSubMinorKeyBits> {};
-
-  // TODO(ishell): The stub uses only kReceiver parameter.
-  DEFINE_CALL_INTERFACE_DESCRIPTOR(LoadWithVector);
-  DEFINE_HANDLER_CODE_STUB(LoadConstant, HandlerStub);
-};
-
 class LoadApiGetterStub : public TurboFanCodeStub {
  public:
   LoadApiGetterStub(Isolate* isolate, bool receiver_is_holder, int index)
       : TurboFanCodeStub(isolate) {
     // If that's not true, we need to ensure that the receiver is actually a
     // JSReceiver. http://crbug.com/609134
     DCHECK(receiver_is_holder);
     minor_key_ = IndexBits::encode(index) |
                  ReceiverIsHolderBits::encode(receiver_is_holder);
   }
@@ skipping 1350 matching lines @@
 #undef DEFINE_PLATFORM_CODE_STUB
 #undef DEFINE_HANDLER_CODE_STUB
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODE_STUBS_H_