[turbofan] Turn common Guard operator into simplified TypeGuard.

src/compiler/common-operator.cc

 // 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.
 
 #include "src/compiler/common-operator.h"
 
 #include "src/assembler.h"
 #include "src/base/lazy-instance.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/opcodes.h"
@@ skipping 742 matching lines @@
       break;
   }
   // Uncached.
   return new (zone()) Operator(               // --
       IrOpcode::kEffectPhi, Operator::kPure,  // opcode
       "EffectPhi",                            // name
       0, effect_input_count, 1, 0, 1, 0);     // counts
 }
 
 
-const Operator* CommonOperatorBuilder::Guard(Type* type) {
-  return new (zone()) Operator1<Type*>(      // --
-      IrOpcode::kGuard, Operator::kKontrol,  // opcode
-      "Guard",                               // name
-      1, 0, 1, 1, 0, 0,                      // counts
-      type);                                 // parameter
-}
-
-
 const Operator* CommonOperatorBuilder::StateValues(int arguments) {
   switch (arguments) {
 #define CACHED_STATE_VALUES(arguments) \
   case arguments:                      \
     return &cache_.kStateValues##arguments##Operator;
     CACHED_STATE_VALUES_LIST(CACHED_STATE_VALUES)
 #undef CACHED_STATE_VALUES
     default:
       break;
   }
@@ skipping 114 matching lines @@
 CommonOperatorBuilder::CreateFrameStateFunctionInfo(
     FrameStateType type, int parameter_count, int local_count,
     Handle<SharedFunctionInfo> shared_info) {
   return new (zone()->New(sizeof(FrameStateFunctionInfo)))
       FrameStateFunctionInfo(type, parameter_count, local_count, shared_info);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8