[turbofan] Drop the obsolete TypeGuard operator.

src/compiler/simplified-operator.cc

 // Copyright 2012 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/simplified-operator.h"
 
 #include "src/base/lazy-instance.h"
 #include "src/compiler/opcodes.h"
 #include "src/compiler/operator.h"
 #include "src/types.h"
@@ skipping 194 matching lines @@
   }
   UNREACHABLE();
   return os;
 }
 
 CheckTaggedHoleMode CheckTaggedHoleModeOf(const Operator* op) {
   DCHECK_EQ(IrOpcode::kCheckTaggedHole, op->opcode());
   return OpParameter<CheckTaggedHoleMode>(op);
 }
 
-Type* TypeOf(const Operator* op) {
-  DCHECK_EQ(IrOpcode::kTypeGuard, op->opcode());
-  return OpParameter<Type*>(op);
-}
-
 BinaryOperationHints::Hint BinaryOperationHintOf(const Operator* op) {
   DCHECK(op->opcode() == IrOpcode::kSpeculativeNumberAdd ||
          op->opcode() == IrOpcode::kSpeculativeNumberSubtract ||
          op->opcode() == IrOpcode::kSpeculativeNumberMultiply ||
          op->opcode() == IrOpcode::kSpeculativeNumberDivide ||
          op->opcode() == IrOpcode::kSpeculativeNumberModulus);
   return OpParameter<BinaryOperationHints::Hint>(op);
 }
 
 CompareOperationHints::Hint CompareOperationHintOf(const Operator* op) {
@@ skipping 222 matching lines @@
                                "ReferenceEqual", 2, 0, 0, 1, 0, 0);
 }
 
 const Operator* SimplifiedOperatorBuilder::CheckBounds() {
   // TODO(bmeurer): Cache this operator. Make it pure!
   return new (zone())
       Operator(IrOpcode::kCheckBounds, Operator::kFoldable | Operator::kNoThrow,
                "CheckBounds", 2, 1, 1, 1, 1, 0);
 }
 
-const Operator* SimplifiedOperatorBuilder::TypeGuard(Type* type) {
-  class TypeGuardOperator final : public Operator1<Type*> {
-   public:
-    explicit TypeGuardOperator(Type* type)
-        : Operator1<Type*>(                           // --
-              IrOpcode::kTypeGuard, Operator::kPure,  // opcode
-              "TypeGuard",                            // name
-              1, 0, 1, 1, 0, 0,                       // counts
-              type) {}                                // parameter
-
-    void PrintParameter(std::ostream& os) const final {
-      parameter()->PrintTo(os);
-    }
-  };
-  return new (zone()) TypeGuardOperator(type);
-}
-
 const Operator* SimplifiedOperatorBuilder::Allocate(PretenureFlag pretenure) {
   switch (pretenure) {
     case NOT_TENURED:
       return &cache_.kAllocateNotTenuredOperator;
     case TENURED:
       return &cache_.kAllocateTenuredOperator;
   }
   UNREACHABLE();
   return nullptr;
 }
@@ skipping 72 matching lines @@
                         Operator::kNoDeopt | Operator::kNoThrow | properties,  \
                         #Name, value_input_count, 1, control_input_count,      \
                         output_count, 1, 0, access);                           \
   }
 ACCESS_OP_LIST(ACCESS)
 #undef ACCESS
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8