[turbofan] Extract frame-states.h from common-operator.h

src/compiler/frame-states.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_COMPILER_FRAME_STATES_H_
+#define V8_COMPILER_FRAME_STATES_H_
+
+#include "src/handles-inl.h"  // TODO(everyone): Fix our inl.h crap
+#include "src/objects-inl.h"  // TODO(everyone): Fix our inl.h crap
+#include "src/utils.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+// Flag that describes how to combine the current environment with
+// the output of a node to obtain a framestate for lazy bailout.
+class OutputFrameStateCombine {
+ public:
+  enum Kind {
+    kPushOutput,  // Push the output on the expression stack.
+    kPokeAt       // Poke at the given environment location,
+                  // counting from the top of the stack.
+  };
+
+  static OutputFrameStateCombine Ignore() {
+    return OutputFrameStateCombine(kPushOutput, 0);
+  }
+  static OutputFrameStateCombine Push(size_t count = 1) {
+    return OutputFrameStateCombine(kPushOutput, count);
+  }
+  static OutputFrameStateCombine PokeAt(size_t index) {
+    return OutputFrameStateCombine(kPokeAt, index);
+  }
+
+  Kind kind() const { return kind_; }
+  size_t GetPushCount() const {
+    DCHECK_EQ(kPushOutput, kind());
+    return parameter_;
+  }
+  size_t GetOffsetToPokeAt() const {
+    DCHECK_EQ(kPokeAt, kind());
+    return parameter_;
+  }
+
+  bool IsOutputIgnored() const {
+    return kind_ == kPushOutput && parameter_ == 0;
+  }
+
+  size_t ConsumedOutputCount() const {
+    return kind_ == kPushOutput ? GetPushCount() : 1;
+  }
+
+  bool operator==(OutputFrameStateCombine const& other) const {
+    return kind_ == other.kind_ && parameter_ == other.parameter_;
+  }
+  bool operator!=(OutputFrameStateCombine const& other) const {
+    return !(*this == other);
+  }
+
+  friend size_t hash_value(OutputFrameStateCombine const&);
+  friend std::ostream& operator<<(std::ostream&,
+                                  OutputFrameStateCombine const&);
+
+ private:
+  OutputFrameStateCombine(Kind kind, size_t parameter)
+      : kind_(kind), parameter_(parameter) {}
+
+  Kind const kind_;
+  size_t const parameter_;
+};
+
+
+// The type of stack frame that a FrameState node represents.
+enum FrameStateType {
+  JS_FRAME,          // Represents an unoptimized JavaScriptFrame.
+  ARGUMENTS_ADAPTOR  // Represents an ArgumentsAdaptorFrame.
+};
+
+
+class FrameStateCallInfo final {
+ public:
+  FrameStateCallInfo(
+      FrameStateType type, BailoutId bailout_id,
+      OutputFrameStateCombine state_combine,
+      MaybeHandle<JSFunction> jsfunction = MaybeHandle<JSFunction>())
+      : type_(type),
+        bailout_id_(bailout_id),
+        frame_state_combine_(state_combine),
+        jsfunction_(jsfunction) {}
+
+  FrameStateType type() const { return type_; }
+  BailoutId bailout_id() const { return bailout_id_; }
+  OutputFrameStateCombine state_combine() const { return frame_state_combine_; }
+  MaybeHandle<JSFunction> jsfunction() const { return jsfunction_; }
+
+ private:
+  FrameStateType type_;
+  BailoutId bailout_id_;
+  OutputFrameStateCombine frame_state_combine_;
+  MaybeHandle<JSFunction> jsfunction_;
+};
+
+bool operator==(FrameStateCallInfo const&, FrameStateCallInfo const&);
+bool operator!=(FrameStateCallInfo const&, FrameStateCallInfo const&);
+
+size_t hash_value(FrameStateCallInfo const&);
+
+std::ostream& operator<<(std::ostream&, FrameStateCallInfo const&);
+
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_COMPILER_FRAME_STATES_H_