[turbofan] Turn common Guard operator into simplified TypeGuard.

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 154 matching lines @@
 }
 
 
 const ElementAccess& ElementAccessOf(const Operator* op) {
   DCHECK_NOT_NULL(op);
   DCHECK(op->opcode() == IrOpcode::kLoadElement ||
          op->opcode() == IrOpcode::kStoreElement);
   return OpParameter<ElementAccess>(op);
 }
 
+Type* TypeOf(const Operator* op) {
+  DCHECK_EQ(IrOpcode::kTypeGuard, op->opcode());
+  return OpParameter<Type*>(op);
+}
+
 #define PURE_OP_LIST(V)                                    \
   V(BooleanNot, Operator::kNoProperties, 1)                \
   V(BooleanToNumber, Operator::kNoProperties, 1)           \
   V(NumberEqual, Operator::kCommutative, 2)                \
   V(NumberLessThan, Operator::kNoProperties, 2)            \
   V(NumberLessThanOrEqual, Operator::kNoProperties, 2)     \
   V(NumberAdd, Operator::kCommutative, 2)                  \
   V(NumberSubtract, Operator::kNoProperties, 2)            \
   V(NumberMultiply, Operator::kCommutative, 2)             \
   V(NumberDivide, Operator::kNoProperties, 2)              \
@@ skipping 90 matching lines @@
 PURE_OP_LIST(GET_FROM_CACHE)
 #undef GET_FROM_CACHE
 
 
 const Operator* SimplifiedOperatorBuilder::ReferenceEqual(Type* type) {
   return new (zone()) Operator(IrOpcode::kReferenceEqual,
                                Operator::kCommutative | Operator::kPure,
                                "ReferenceEqual", 2, 0, 0, 1, 0, 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 40 matching lines @@
         Operator1<Type>(IrOpcode::k##Name, 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