Upgrade V8 to version 4.9.385.28
https://chromium.googlesource.com/v8/v8/+/4.9.385.28
FPIIM-449
Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/src/signature.h b/src/signature.h
new file mode 100644
index 0000000..076d17a
--- /dev/null
+++ b/src/signature.h
@@ -0,0 +1,80 @@
+// 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_SIGNATURE_H_
+#define V8_SIGNATURE_H_
+
+#include "src/zone.h"
+
+namespace v8 {
+namespace internal {
+
+// Describes the inputs and outputs of a function or call.
+template <typename T>
+class Signature : public ZoneObject {
+ public:
+ Signature(size_t return_count, size_t parameter_count, T* reps)
+ : return_count_(return_count),
+ parameter_count_(parameter_count),
+ reps_(reps) {}
+
+ size_t return_count() const { return return_count_; }
+ size_t parameter_count() const { return parameter_count_; }
+
+ T GetParam(size_t index) const {
+ DCHECK(index < parameter_count_);
+ return reps_[return_count_ + index];
+ }
+
+ T GetReturn(size_t index = 0) const {
+ DCHECK(index < return_count_);
+ return reps_[index];
+ }
+
+ // For incrementally building signatures.
+ class Builder {
+ public:
+ Builder(Zone* zone, size_t return_count, size_t parameter_count)
+ : return_count_(return_count),
+ parameter_count_(parameter_count),
+ zone_(zone),
+ rcursor_(0),
+ pcursor_(0),
+ buffer_(zone->NewArray<T>(
+ static_cast<int>(return_count + parameter_count))) {}
+
+ const size_t return_count_;
+ const size_t parameter_count_;
+
+ void AddReturn(T val) {
+ DCHECK(rcursor_ < return_count_);
+ buffer_[rcursor_++] = val;
+ }
+ void AddParam(T val) {
+ DCHECK(pcursor_ < parameter_count_);
+ buffer_[return_count_ + pcursor_++] = val;
+ }
+ Signature<T>* Build() {
+ DCHECK(rcursor_ == return_count_);
+ DCHECK(pcursor_ == parameter_count_);
+ return new (zone_) Signature<T>(return_count_, parameter_count_, buffer_);
+ }
+
+ private:
+ Zone* zone_;
+ size_t rcursor_;
+ size_t pcursor_;
+ T* buffer_;
+ };
+
+ protected:
+ size_t return_count_;
+ size_t parameter_count_;
+ T* reps_;
+};
+
+} // namespace internal
+} // namespace v8
+
+#endif // V8_SIGNATURE_H_