[turbofan] Add Int64(Add|Sub)WithOverflow support.

test/cctest/compiler/codegen-tester.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_CCTEST_COMPILER_CODEGEN_TESTER_H_
 #define V8_CCTEST_COMPILER_CODEGEN_TESTER_H_
 
 #include "src/compiler/instruction-selector.h"
 #include "src/compiler/pipeline.h"
 #include "src/compiler/raw-machine-assembler.h"
@@ skipping 351 matching lines @@
 // A helper class for testing code sequences that take two int parameters and
 // return an int value.
 class Int32BinopTester : public BinopTester<int32_t, USE_RETURN_REGISTER> {
  public:
   explicit Int32BinopTester(RawMachineAssemblerTester<int32_t>* tester)
       : BinopTester<int32_t, USE_RETURN_REGISTER>(tester,
                                                   MachineType::Int32()) {}
 };
 
 
+// A helper class for testing code sequences that take two int parameters and
+// return an int value.
+class Int64BinopTester : public BinopTester<int64_t, USE_RETURN_REGISTER> {
+ public:
+  explicit Int64BinopTester(RawMachineAssemblerTester<int32_t>* tester)
+      : BinopTester<int64_t, USE_RETURN_REGISTER>(tester,
+                                                  MachineType::Int64()) {}
+};
+
+
 // A helper class for testing code sequences that take two uint parameters and
 // return an uint value.
 class Uint32BinopTester : public BinopTester<uint32_t, USE_RETURN_REGISTER> {
  public:
   explicit Uint32BinopTester(RawMachineAssemblerTester<int32_t>* tester)
       : BinopTester<uint32_t, USE_RETURN_REGISTER>(tester,
                                                    MachineType::Uint32()) {}
 
   uint32_t call(uint32_t a0, uint32_t a1) {
     p0 = a0;
@@ skipping 161 matching lines @@
   } else {
     CHECK_EQ(x, y);
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CCTEST_COMPILER_CODEGEN_TESTER_H_