[turbofan] Model arguments object materialization in graph.

src/compiler/js-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/js-operator.h"
 
 #include <limits>
 
 #include "src/base/lazy-instance.h"
 #include "src/compiler/opcodes.h"
@@ skipping 373 matching lines @@
   return os << p.language_mode();
 }
 
 
 const StorePropertyParameters& StorePropertyParametersOf(const Operator* op) {
   DCHECK_EQ(IrOpcode::kJSStoreProperty, op->opcode());
   return OpParameter<StorePropertyParameters>(op);
 }
 
 
+bool operator==(CreateArgumentsParameters const& lhs,
+                CreateArgumentsParameters const& rhs) {
+  return lhs.type() == rhs.type() && lhs.start_index() == rhs.start_index();
+}
+
+
+bool operator!=(CreateArgumentsParameters const& lhs,
+                CreateArgumentsParameters const& rhs) {
+  return !(lhs == rhs);
+}
+
+
+size_t hash_value(CreateArgumentsParameters const& p) {
+  return base::hash_combine(p.type(), p.start_index());
+}
+
+
+std::ostream& operator<<(std::ostream& os, CreateArgumentsParameters const& p) {
+  return os << p.type() << ", " << p.start_index();
+}
+
+
 bool operator==(CreateClosureParameters const& lhs,
                 CreateClosureParameters const& rhs) {
   return lhs.pretenure() == rhs.pretenure() &&
          lhs.shared_info().is_identical_to(rhs.shared_info());
 }
 
 
 bool operator!=(CreateClosureParameters const& lhs,
                 CreateClosureParameters const& rhs) {
   return !(lhs == rhs);
@@ skipping 294 matching lines @@
   ContextAccess context_access(depth, index, false);
   DynamicContextAccess access(name, check_bitset, context_access);
   return new (zone()) Operator1<DynamicContextAccess>(           // --
       IrOpcode::kJSLoadDynamicContext, Operator::kNoProperties,  // opcode
       "JSLoadDynamicContext",                                    // name
       1, 1, 1, 1, 1, 2,                                          // counts
       access);                                                   // parameter
 }
 
 
+const Operator* JSOperatorBuilder::CreateArguments(
+    CreateArgumentsParameters::Type type, int start_index) {
+  DCHECK_IMPLIES(start_index, type == CreateArgumentsParameters::kRestArray);
+  CreateArgumentsParameters parameters(type, start_index);
+  return new (zone()) Operator1<CreateArgumentsParameters>(  // --
+      IrOpcode::kJSCreateArguments, Operator::kNoThrow,      // opcode
+      "JSCreateArguments",                                   // name
+      1, 1, 1, 1, 1, 0,                                      // counts
+      parameters);                                           // parameter
+}
+
+
 const Operator* JSOperatorBuilder::CreateClosure(
     Handle<SharedFunctionInfo> shared_info, PretenureFlag pretenure) {
   CreateClosureParameters parameters(shared_info, pretenure);
   return new (zone()) Operator1<CreateClosureParameters>(  // --
       IrOpcode::kJSCreateClosure, Operator::kNoThrow,      // opcode
       "JSCreateClosure",                                   // name
       0, 1, 1, 1, 1, 0,                                    // counts
       parameters);                                         // parameter
 }
 
@@ skipping 22 matching lines @@
                                 Handle<String>::hash>(           // --
       IrOpcode::kJSCreateCatchContext, Operator::kNoProperties,  // opcode
       "JSCreateCatchContext",                                    // name
       2, 1, 1, 1, 1, 2,                                          // counts
       name);                                                     // parameter
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8