deps: update V8 to 5.4.500.27

Pick up latest commit from the 5.4-lkgr branch.

deps: edit V8 gitignore to allow trace event copy
deps: update V8 trace event to 315bf1e2d45be7d53346c31cfcc37424a32c30c8
deps: edit V8 gitignore to allow gtest_prod.h copy
deps: update V8 gtest to 6f8a66431cb592dad629028a50b3dd418a408c87

PR-URL: https://github.com/nodejs/node/pull/8317
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/deps/v8/src/interpreter/bytecode-decoder.h b/deps/v8/src/interpreter/bytecode-decoder.h
new file mode 100644
index 0000000000..6613179d0c
--- /dev/null
+++ b/deps/v8/src/interpreter/bytecode-decoder.h
@@ -0,0 +1,43 @@
+// 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_INTERPRETER_BYTECODE_DECODER_H_
+#define V8_INTERPRETER_BYTECODE_DECODER_H_
+
+#include <iosfwd>
+
+#include "src/interpreter/bytecode-register.h"
+#include "src/interpreter/bytecodes.h"
+
+namespace v8 {
+namespace internal {
+namespace interpreter {
+
+class BytecodeDecoder final {
+ public:
+  // Decodes a register operand in a byte array.
+  static Register DecodeRegisterOperand(const uint8_t* operand_start,
+                                        OperandType operand_type,
+                                        OperandScale operand_scale);
+
+  // Decodes a signed operand in a byte array.
+  static int32_t DecodeSignedOperand(const uint8_t* operand_start,
+                                     OperandType operand_type,
+                                     OperandScale operand_scale);
+
+  // Decodes an unsigned operand in a byte array.
+  static uint32_t DecodeUnsignedOperand(const uint8_t* operand_start,
+                                        OperandType operand_type,
+                                        OperandScale operand_scale);
+
+  // Decode a single bytecode and operands to |os|.
+  static std::ostream& Decode(std::ostream& os, const uint8_t* bytecode_start,
+                              int number_of_parameters);
+};
+
+}  // namespace interpreter
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_INTERPRETER_BYTECODE_DECODER_H_