[interpreter] Add basic framework for bytecode handler code generation.

test/unittests/compiler/interpreter-assembler-unittest.h

+// 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.
+
+#ifndef V8_UNITTESTS_COMPILER_INTERPRETER_ASSEMBLER_UNITTEST_H_
+#define V8_UNITTESTS_COMPILER_INTERPRETER_ASSEMBLER_UNITTEST_H_
+
+#include "src/compiler/interpreter-assembler.h"
+#include "src/compiler/linkage.h"
+#include "src/compiler/machine-operator.h"
+#include "test/unittests/test-utils.h"
+#include "testing/gmock-support.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+using ::testing::Matcher;
+
+class InterpreterAssemblerTest : public TestWithIsolateAndZone {
+ public:
+  InterpreterAssemblerTest() {}
+  ~InterpreterAssemblerTest() override {}
+
+  class InterpreterAssemblerForTest final : public InterpreterAssembler {
+   public:
+    InterpreterAssemblerForTest(InterpreterAssemblerTest* test,
+                                interpreter::Bytecode bytecode)
+        : InterpreterAssembler(test->isolate(), test->zone(), bytecode) {}
+    ~InterpreterAssemblerForTest() override {}
+
+    Graph* GetCompletedGraph();
+
+    Matcher<Node*> IsLoad(const Matcher<LoadRepresentation>& rep_matcher,
+                          const Matcher<Node*>& base_matcher,
+                          const Matcher<Node*>& index_matcher);
+    Matcher<Node*> IsStore(const Matcher<StoreRepresentation>& rep_matcher,
+                           const Matcher<Node*>& base_matcher,
+                           const Matcher<Node*>& index_matcher,
+                           const Matcher<Node*>& value_matcher);
+
+    CallDescriptor* call_descriptor() const {

[Michael Starzinger, 2015/07/23 11:05:04]

nit: Could we use "using InterpreterAssembler::call_descriptor;" here instead?

[rmcilroy, 2015/07/23 11:58:54]

I learn something new about c++ every day :). Done.

+      return InterpreterAssembler::call_descriptor();
+    }
+    Graph* graph() { return InterpreterAssembler::graph(); }

[Michael Starzinger, 2015/07/23 11:05:04]

nit: Likewise.

[rmcilroy, 2015/07/23 11:58:54]

Done. Also did the same for the constants below.

+
+    int max_register_index() const { return kMaxRegisterIndex; }
+    int first_regster_offset_from_fp() const {
+      return kFirstRegsterOffsetFromFp;
+    }
+
+   private:
+    DISALLOW_COPY_AND_ASSIGN(InterpreterAssemblerForTest);
+  };
+};
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_UNITTESTS_COMPILER_INTERPRETER_ASSEMBLER_UNITTEST_H_