[turbofan] Add support for Finish to the InstructionSelector.

test/compiler-unittests/instruction-selector-unittest.h

 // Copyright 2014 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_COMPILER_UNITTESTS_INSTRUCTION_SELECTOR_UNITTEST_H_
 #define V8_COMPILER_UNITTESTS_INSTRUCTION_SELECTOR_UNITTEST_H_
 
 #include <deque>
-#include <ostream>  // NOLINT(readability/streams)
+#include <set>
 
 #include "src/base/utils/random-number-generator.h"
 #include "src/compiler/instruction-selector.h"
 #include "src/compiler/raw-machine-assembler.h"
 #include "test/compiler-unittests/compiler-unittests.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
@@ skipping 89 matching lines @@
   };
 
   class Stream V8_FINAL {
    public:
     size_t size() const { return instructions_.size(); }
     const Instruction* operator[](size_t index) const {
       EXPECT_LT(index, size());
       return instructions_[index];
     }
 
+    bool IsDouble(int virtual_register) const {
+      return doubles_.find(virtual_register) != doubles_.end();
+    }
+
+    bool IsReference(int virtual_register) const {
+      return references_.find(virtual_register) != references_.end();
+    }
+
     int32_t ToInt32(const InstructionOperand* operand) const {
       return ToConstant(operand).ToInt32();
     }
 
     int ToVreg(const InstructionOperand* operand) const {
       EXPECT_EQ(InstructionOperand::UNALLOCATED, operand->kind());
       return UnallocatedOperand::cast(operand)->virtual_register();
     }
 
    private:
@@ skipping 11 matching lines @@
       return i->second;
     }
 
     friend class StreamBuilder;
 
     typedef std::map<int, Constant> ConstantMap;
 
     ConstantMap constants_;
     ConstantMap immediates_;
     std::deque<Instruction*> instructions_;
+    std::set<int> doubles_;
+    std::set<int> references_;
   };
 
   base::RandomNumberGenerator rng_;
 };
 
 
 template <typename T>
 class InstructionSelectorTestWithParam
     : public InstructionSelectorTest,
       public ::testing::WithParamInterface<T> {};
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_UNITTESTS_INSTRUCTION_SELECTOR_UNITTEST_H_