[turbofan] Emit memory operands for cmp and test on ia32 and x64 when it makes sense.

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"
@@ skipping 131 matching lines @@
   // generated for it.
   bool IsDefined(Node* node) const;
 
   // Checks if {node} has any uses, and therefore code has to be generated for
   // it.
   bool IsUsed(Node* node) const;
 
   // Checks if {node} is currently live.
   bool IsLive(Node* node) const { return !IsDefined(node) && IsUsed(node); }
 
+  // Gets the effect level of {node}.
+  int GetEffectLevel(Node* node) const;
+
   int GetVirtualRegister(const Node* node);
   const std::map<NodeId, int> GetVirtualRegistersForTesting() const;
 
   Isolate* isolate() const { return sequence()->isolate(); }
 
  private:
   friend class OperandGenerator;
 
   void EmitTableSwitch(const SwitchInfo& sw, InstructionOperand& index_operand);
   void EmitLookupSwitch(const SwitchInfo& sw,
                         InstructionOperand& value_operand);
 
   // Inform the instruction selection that {node} was just defined.
   void MarkAsDefined(Node* node);
 
   // Inform the instruction selection that {node} has at least one use and we
   // will need to generate code for it.
   void MarkAsUsed(Node* node);
 
+  // Sets the effect level of {node}.
+  void SetEffectLevel(Node* node, int effect_level);
+
   // Inform the register allocation of the representation of the value produced
   // by {node}.
   void MarkAsRepresentation(MachineRepresentation rep, Node* node);
   void MarkAsWord32(Node* node) {
     MarkAsRepresentation(MachineRepresentation::kWord32, node);
   }
   void MarkAsWord64(Node* node) {
     MarkAsRepresentation(MachineRepresentation::kWord64, node);
   }
   void MarkAsFloat32(Node* node) {
@@ skipping 81 matching lines @@
   Linkage* const linkage_;
   InstructionSequence* const sequence_;
   SourcePositionTable* const source_positions_;
   SourcePositionMode const source_position_mode_;
   Features features_;
   Schedule* const schedule_;
   BasicBlock* current_block_;
   ZoneVector<Instruction*> instructions_;
   BoolVector defined_;
   BoolVector used_;
+  IntVector effect_level_;
   IntVector virtual_registers_;
   InstructionScheduler* scheduler_;
   Frame* frame_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_SELECTOR_H_