[turbofan] Kill type Guard nodes during effect/control linearization.

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 229 matching lines @@
   void VisitControl(BasicBlock* block);
 
   // Visit the node and generate code, if any.
   void VisitNode(Node* node);
 
 #define DECLARE_GENERATOR(x) void Visit##x(Node* node);
   MACHINE_OP_LIST(DECLARE_GENERATOR)
 #undef DECLARE_GENERATOR
 
   void VisitFinishRegion(Node* node);
-  void VisitGuard(Node* node);
   void VisitParameter(Node* node);
   void VisitIfException(Node* node);
   void VisitOsrValue(Node* node);
   void VisitPhi(Node* node);
   void VisitProjection(Node* node);
   void VisitConstant(Node* node);
   void VisitCall(Node* call, BasicBlock* handler = nullptr);
   void VisitDeoptimizeIf(Node* node);
   void VisitDeoptimizeUnless(Node* node);
   void VisitTailCall(Node* call);
@@ skipping 32 matching lines @@
   IntVector virtual_registers_;
   InstructionScheduler* scheduler_;
   Frame* frame_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_SELECTOR_H_