WIP [esnext] implement async iteration proposal

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 472 matching lines @@
 }
 
 
 const CreateLiteralParameters& CreateLiteralParametersOf(const Operator* op) {
   DCHECK(op->opcode() == IrOpcode::kJSCreateLiteralArray ||
          op->opcode() == IrOpcode::kJSCreateLiteralObject ||
          op->opcode() == IrOpcode::kJSCreateLiteralRegExp);
   return OpParameter<CreateLiteralParameters>(op);
 }
 
+bool operator==(GeneratorStoreParameters const& lhs,
+                GeneratorStoreParameters const& rhs) {
+  return lhs.register_count() == rhs.register_count() &&
+         lhs.suspend_type() == rhs.suspend_type();
+}
+bool operator!=(GeneratorStoreParameters const& lhs,
+                GeneratorStoreParameters const& rhs) {
+  return !(lhs == rhs);
+}
+
+size_t hash_value(GeneratorStoreParameters const& p) {
+  return base::hash_combine(p.register_count(),
+                            static_cast<int>(p.suspend_type()));
+}
+
+std::ostream& operator<<(std::ostream& os, GeneratorStoreParameters const& p) {
+  const char* suspend_type =
+      p.suspend_type() == SuspendType::kYield ? "yield" : "await";
+  return os << p.register_count() << " (" << suspend_type << ")";
+}
+
+const GeneratorStoreParameters& GeneratorStoreParametersOf(const Operator* op) {
+  DCHECK_EQ(op->opcode(), IrOpcode::kJSGeneratorStore);
+  return OpParameter<GeneratorStoreParameters>(op);
+}
+
 BinaryOperationHint BinaryOperationHintOf(const Operator* op) {
   DCHECK(op->opcode() == IrOpcode::kJSBitwiseOr ||
          op->opcode() == IrOpcode::kJSBitwiseXor ||
          op->opcode() == IrOpcode::kJSBitwiseAnd ||
          op->opcode() == IrOpcode::kJSShiftLeft ||
          op->opcode() == IrOpcode::kJSShiftRight ||
          op->opcode() == IrOpcode::kJSShiftRightLogical ||
          op->opcode() == IrOpcode::kJSAdd ||
          op->opcode() == IrOpcode::kJSSubtract ||
          op->opcode() == IrOpcode::kJSMultiply ||
@@ skipping 271 matching lines @@
 const Operator* JSOperatorBuilder::LoadProperty(
     VectorSlotPair const& feedback) {
   PropertyAccess access(SLOPPY, feedback);
   return new (zone()) Operator1<PropertyAccess>(           // --
       IrOpcode::kJSLoadProperty, Operator::kNoProperties,  // opcode
       "JSLoadProperty",                                    // name
       2, 1, 1, 1, 1, 2,                                    // counts
       access);                                             // parameter
 }
 
-const Operator* JSOperatorBuilder::GeneratorStore(int register_count) {
-  return new (zone()) Operator1<int>(                   // --
-      IrOpcode::kJSGeneratorStore, Operator::kNoThrow,  // opcode
-      "JSGeneratorStore",                               // name
-      3 + register_count, 1, 1, 0, 1, 0,                // counts
-      register_count);                                  // parameter
+const Operator* JSOperatorBuilder::GeneratorStore(int register_count,
+                                                  SuspendType suspend_type) {
+  GeneratorStoreParameters parameters(register_count, suspend_type);
+  return new (zone()) Operator1<GeneratorStoreParameters>(  // --
+      IrOpcode::kJSGeneratorStore, Operator::kNoThrow,      // opcode
+      "JSGeneratorStore",                                   // name
+      3 + register_count, 1, 1, 0, 1, 0,                    // counts
+      parameters);                                          // parameter
 }
 
 const Operator* JSOperatorBuilder::GeneratorRestoreRegister(int index) {
   return new (zone()) Operator1<int>(                             // --
       IrOpcode::kJSGeneratorRestoreRegister, Operator::kNoThrow,  // opcode
       "JSGeneratorRestoreRegister",                               // name
       1, 1, 1, 1, 1, 0,                                           // counts
       index);                                                     // parameter
 }
 
@@ skipping 204 matching lines @@
   return new (zone()) Operator1<Handle<ScopeInfo>>(               // --
       IrOpcode::kJSCreateScriptContext, Operator::kNoProperties,  // opcode
       "JSCreateScriptContext",                                    // name
       1, 1, 1, 1, 1, 2,                                           // counts
       scope_info);                                                // parameter
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8