[turbofan] Remove usage of Unique<T> from graph.

src/interpreter/interpreter.cc

 // Copyright 2015 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.
 
 #include "src/interpreter/interpreter.h"
 
 #include "src/compiler.h"
 #include "src/compiler/interpreter-assembler.h"
 #include "src/factory.h"
 #include "src/interpreter/bytecode-generator.h"
@@ skipping 103 matching lines @@
   Node* constant = __ LoadConstantPoolEntry(index);
   __ SetAccumulator(constant);
   __ Dispatch();
 }
 
 
 // LdaUndefined
 //
 // Load Undefined into the accumulator.
 void Interpreter::DoLdaUndefined(compiler::InterpreterAssembler* assembler) {
-  Node* undefined_value = __ HeapConstant(Unique<HeapObject>::CreateImmovable(
-      isolate_->factory()->undefined_value()));
+  Node* undefined_value =
+      __ HeapConstant(isolate_->factory()->undefined_value());
   __ SetAccumulator(undefined_value);
   __ Dispatch();
 }
 
 
 // LdaNull
 //
 // Load Null into the accumulator.
 void Interpreter::DoLdaNull(compiler::InterpreterAssembler* assembler) {
-  Node* null_value = __ HeapConstant(
-      Unique<HeapObject>::CreateImmovable(isolate_->factory()->null_value()));
+  Node* null_value = __ HeapConstant(isolate_->factory()->null_value());
   __ SetAccumulator(null_value);
   __ Dispatch();
 }
 
 
 // LdaTheHole
 //
 // Load TheHole into the accumulator.
 void Interpreter::DoLdaTheHole(compiler::InterpreterAssembler* assembler) {
-  Node* the_hole_value = __ HeapConstant(Unique<HeapObject>::CreateImmovable(
-      isolate_->factory()->the_hole_value()));
+  Node* the_hole_value = __ HeapConstant(isolate_->factory()->the_hole_value());
   __ SetAccumulator(the_hole_value);
   __ Dispatch();
 }
 
 
 // LdaTrue
 //
 // Load True into the accumulator.
 void Interpreter::DoLdaTrue(compiler::InterpreterAssembler* assembler) {
-  Node* true_value = __ HeapConstant(
-      Unique<HeapObject>::CreateImmovable(isolate_->factory()->true_value()));
+  Node* true_value = __ HeapConstant(isolate_->factory()->true_value());
   __ SetAccumulator(true_value);
   __ Dispatch();
 }
 
 
 // LdaFalse
 //
 // Load False into the accumulator.
 void Interpreter::DoLdaFalse(compiler::InterpreterAssembler* assembler) {
-  Node* false_value = __ HeapConstant(
-      Unique<HeapObject>::CreateImmovable(isolate_->factory()->false_value()));
+  Node* false_value = __ HeapConstant(isolate_->factory()->false_value());
   __ SetAccumulator(false_value);
   __ Dispatch();
 }
 
 
 // Ldar <src>
 //
 // Load accumulator with value from register <src>.
 void Interpreter::DoLdar(compiler::InterpreterAssembler* assembler) {
   Node* reg_index = __ BytecodeOperandReg(0);
@@ skipping 71 matching lines @@
 //
 // Return the value in register 0.
 void Interpreter::DoReturn(compiler::InterpreterAssembler* assembler) {
   __ Return();
 }
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8