[turbofan] Effect linearization after representation inference.

src/compiler/effect-control-linearizer.h

+// Copyright 2016 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_EFFECT_CONTROL_LINEARIZER_H_
+#define V8_COMPILER_EFFECT_CONTROL_LINEARIZER_H_
+
+#include "src/compiler/common-operator.h"
+#include "src/compiler/node.h"
+#include "src/compiler/simplified-operator.h"
+
+namespace v8 {
+namespace internal {
+
+class Zone;
+
+namespace compiler {
+
+class CommonOperatorBuilder;
+class SimplifiedOperatorBuilder;
+class MachineOperatorBuilder;
+class JSGraph;
+class Graph;
+class Schedule;
+
+class EffectControlLinearizer {
+ public:
+  EffectControlLinearizer(JSGraph* graph, Schedule* schedule, Zone* temp_zone);
+
+  void Run();
+
+ private:
+  void ProcessNode(Node* node, Node** current_effect, Node** control);
+
+  struct ValueEffectControl {
+    Node* value;
+    Node* effect;
+    Node* control;
+    ValueEffectControl(Node* value, Node* effect, Node* control)
+        : value(value), effect(effect), control(control) {}
+  };
+
+  bool TryWireInStateEffect(Node* node, Node** effect, Node** control);
+  ValueEffectControl LowerChangeInt32ToTagged(Node* node, Node* effect,
+                                              Node* control);
+  ValueEffectControl LowerChangeUint32ToTagged(Node* node, Node* effect,
+                                               Node* control);
+  ValueEffectControl LowerChangeFloat64ToTagged(Node* node, Node* effect,
+                                                Node* control);
+  ValueEffectControl AllocateHeapNumberWithValue(Node* node, Node* effect,
+                                                 Node* control);
+
+  Node* ChangeInt32ToSmi(Node* value);
+  Node* ChangeUint32ToSmi(Node* value);
+  Node* ChangeInt32ToFloat64(Node* value);
+  Node* ChangeUint32ToFloat64(Node* value);
+
+  Node* HeapNumberValueIndexConstant();
+  Node* SmiMaxValueConstant();
+  Node* SmiShiftBitsConstant();
+
+  JSGraph* jsgraph() const { return js_graph_; }
+  Graph* graph() const;
+  Schedule* schedule() const { return schedule_; }
+  Zone* temp_zone() const { return temp_zone_; }
+  CommonOperatorBuilder* common() const;
+  SimplifiedOperatorBuilder* simplified() const;
+  MachineOperatorBuilder* machine() const;
+
+  JSGraph* js_graph_;
+  Schedule* schedule_;
+  Zone* temp_zone_;
+  SetOncePointer<const Operator> allocate_heap_number_operator_;
+};
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_COMPILER_EFFECT_CONTROL_LINEARIZER_H_