[runtime] Remove the redundant %_IsObject intrinsic.

src/hydrogen-instructions.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_HYDROGEN_INSTRUCTIONS_H_
 #define V8_HYDROGEN_INSTRUCTIONS_H_
 
 #include <cstring>
 #include <iosfwd>
 
@@ skipping 90 matching lines @@
   V(FunctionLiteral)                          \
   V(GetCachedArrayIndex)                      \
   V(Goto)                                     \
   V(HasCachedArrayIndexAndBranch)             \
   V(HasInstanceTypeAndBranch)                 \
   V(InnerAllocatedObject)                     \
   V(InstanceOf)                               \
   V(InvokeFunction)                           \
   V(IsConstructCallAndBranch)                 \
   V(HasInPrototypeChainAndBranch)             \
-  V(IsObjectAndBranch)                        \
   V(IsStringAndBranch)                        \
   V(IsSmiAndBranch)                           \
   V(IsUndetectableAndBranch)                  \
   V(LeaveInlined)                             \
   V(LoadContextSlot)                          \
   V(LoadFieldByIndex)                         \
   V(LoadFunctionPrototype)                    \
   V(LoadGlobalGeneric)                        \
   V(LoadGlobalViaContext)                     \
   V(LoadKeyed)                                \
@@ skipping 4330 matching lines @@
     SetOperandAt(0, left);
     SetOperandAt(1, right);
     SetSuccessorAt(0, true_target);
     SetSuccessorAt(1, false_target);
   }
 
   int known_successor_index_;
 };
 
 
-class HIsObjectAndBranch final : public HUnaryControlInstruction {
- public:
-  DECLARE_INSTRUCTION_FACTORY_P1(HIsObjectAndBranch, HValue*);
-  DECLARE_INSTRUCTION_FACTORY_P3(HIsObjectAndBranch, HValue*,
-                                 HBasicBlock*, HBasicBlock*);
-
-  Representation RequiredInputRepresentation(int index) override {
-    return Representation::Tagged();
-  }
-
-  bool KnownSuccessorBlock(HBasicBlock** block) override;
-
-  DECLARE_CONCRETE_INSTRUCTION(IsObjectAndBranch)
-
- private:
-  HIsObjectAndBranch(HValue* value,
-                     HBasicBlock* true_target = NULL,
-                     HBasicBlock* false_target = NULL)
-    : HUnaryControlInstruction(value, true_target, false_target) {}
-};
-
-
 class HIsStringAndBranch final : public HUnaryControlInstruction {
  public:
   DECLARE_INSTRUCTION_FACTORY_P1(HIsStringAndBranch, HValue*);
   DECLARE_INSTRUCTION_FACTORY_P3(HIsStringAndBranch, HValue*,
                                  HBasicBlock*, HBasicBlock*);
 
   Representation RequiredInputRepresentation(int index) override {
     return Representation::Tagged();
   }
 
@@ skipping 3570 matching lines @@
 };
 
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_