[turbofan] Add a Simplified::CheckMaps instruction.

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-inl.h"
@@ skipping 216 matching lines @@
 SimplifiedOperatorBuilder::SimplifiedOperatorBuilder(Zone* zone)
     : cache_(kCache.Get()), zone_(zone) {}
 
 
 #define PURE(Name, properties, input_count) \
   const Operator* SimplifiedOperatorBuilder::Name() { return &cache_.k##Name; }
 PURE_OP_LIST(PURE)
 #undef PURE
 
 
+const Operator* SimplifiedOperatorBuilder::CheckMaps(int map_count) {
+  DCHECK_GE(map_count, 1);
+  // TODO(turbofan): cache CheckMaps operators
+  return new (zone()) Operator1<int32_t>(
+      IrOpcode::kCheckMaps, Operator::kNoWrite | Operator::kNoThrow,
+      "CheckMaps", 1 + map_count, 1, 1, 0, 0, 1, map_count);
+}
+
+
 const Operator* SimplifiedOperatorBuilder::ReferenceEqual(Type* type) {
   // TODO(titzer): What about the type parameter?
   return new (zone()) Operator(IrOpcode::kReferenceEqual,
                                Operator::kCommutative | Operator::kPure,
                                "ReferenceEqual", 2, 0, 0, 1, 0, 0);
 }
 
 
 const Operator* SimplifiedOperatorBuilder::Allocate(PretenureFlag pretenure) {
   return new (zone())
@@ skipping 42 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