[turbofan] Improve memory consumption for state values descriptors.

src/compiler/instruction-selector.h

 // Copyright 2014 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_INSTRUCTION_SELECTOR_H_
 #define V8_COMPILER_INSTRUCTION_SELECTOR_H_
 
 #include <map>
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/instruction-scheduler.h"
 #include "src/compiler/instruction.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node.h"
 #include "src/globals.h"
 #include "src/zone/zone-containers.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // Forward declarations.
 class BasicBlock;
 struct CallBuffer;  // TODO(bmeurer): Remove this.
 class FlagsContinuation;
 class Linkage;
 class OperandGenerator;
 struct SwitchInfo;
+class StateObjectDeduplicator;
 
 // This struct connects nodes of parameters which are going to be pushed on the
 // call stack with their parameter index in the call descriptor of the callee.
 class PushParameter {
  public:
   PushParameter() : node_(nullptr), type_(MachineType::None()) {}
   PushParameter(Node* node, MachineType type) : node_(node), type_(type) {}
 
   Node* node() const { return node_; }
   MachineType type() const { return type_; }
 
  private:
   Node* node_;
   MachineType type_;
 };
 
+enum class FrameStateInputKind { kAny, kStackSlot };
+
 // Instruction selection generates an InstructionSequence for a given Schedule.
 class V8_EXPORT_PRIVATE InstructionSelector final {
  public:
   // Forward declarations.
   class Features;
 
   enum SourcePositionMode { kCallSourcePositions, kAllSourcePositions };
   enum EnableScheduling { kDisableScheduling, kEnableScheduling };
   enum EnableSerialization { kDisableSerialization, kEnableSerialization };
 
@@ skipping 224 matching lines @@
   // corresponding
   // to the inputs and outputs of the call.
   // {call_code_immediate} to generate immediate operands to calls of code.
   // {call_address_immediate} to generate immediate operands to address calls.
   void InitializeCallBuffer(Node* call, CallBuffer* buffer,
                             CallBufferFlags flags, int stack_slot_delta = 0);
   bool IsTailCallAddressImmediate();
   int GetTempsCountForTailCallFromJSFunction();
 
   FrameStateDescriptor* GetFrameStateDescriptor(Node* node);
+  size_t AddInputsToFrameStateDescriptor(FrameStateDescriptor* descriptor,
+                                         Node* state, OperandGenerator* g,
+                                         StateObjectDeduplicator* deduplicator,
+                                         InstructionOperandVector* inputs,
+                                         FrameStateInputKind kind, Zone* zone);
+  size_t AddOperandToStateValueDescriptor(StateValueList* values,
+                                          InstructionOperandVector* inputs,
+                                          OperandGenerator* g,
+                                          StateObjectDeduplicator* deduplicator,
+                                          Node* input, MachineType type,
+                                          FrameStateInputKind kind, Zone* zone);
 
   // ===========================================================================
   // ============= Architecture-specific graph covering methods. ===============
   // ===========================================================================
 
   // Visit nodes in the given block and generate code.
   void VisitBlock(BasicBlock* block);
 
   // Visit the node for the control flow at the end of the block, generating
   // code if necessary.
@@ skipping 73 matching lines @@
   EnableSerialization enable_serialization_;
   Frame* frame_;
   bool instruction_selection_failed_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_SELECTOR_H_