[Interpreter] Adds delete operator to interpreter.

src/interpreter/bytecode-array-builder.cc

 // Copyright 2015 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/interpreter/bytecode-array-builder.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
@@ skipping 678 matching lines @@
 BytecodeArrayBuilder& BytecodeArrayBuilder::CallRuntime(
     Runtime::FunctionId function_id, Register first_arg, size_t arg_count) {
   DCHECK(FitsInIdx16Operand(function_id));
   DCHECK(FitsInIdx8Operand(arg_count));
   Output(Bytecode::kCallRuntime, static_cast<uint16_t>(function_id),
          first_arg.ToOperand(), static_cast<uint8_t>(arg_count));
   return *this;
 }
 
 
+BytecodeArrayBuilder& BytecodeArrayBuilder::Delete(Register object,
+                                                   LanguageMode language_mode) {
+  Output(BytecodeForDelete(language_mode), object.ToOperand());
+  return *this;
+}
+
+
 size_t BytecodeArrayBuilder::GetConstantPoolEntry(Handle<Object> object) {
   // These constants shouldn't be added to the constant pool, the should use
   // specialzed bytecodes instead.
   DCHECK(!object.is_identical_to(isolate_->factory()->undefined_value()));
   DCHECK(!object.is_identical_to(isolate_->factory()->null_value()));
   DCHECK(!object.is_identical_to(isolate_->factory()->the_hole_value()));
   DCHECK(!object.is_identical_to(isolate_->factory()->true_value()));
   DCHECK(!object.is_identical_to(isolate_->factory()->false_value()));
 
   size_t* entry = constants_map_.Find(object);
@@ skipping 300 matching lines @@
     case CreateArgumentsType::kUnmappedArguments:
       return Bytecode::kCreateUnmappedArguments;
     default:
       UNREACHABLE();
   }
   return static_cast<Bytecode>(-1);
 }
 
 
 // static
+Bytecode BytecodeArrayBuilder::BytecodeForDelete(
+    LanguageMode language_mode) {
+  switch (language_mode) {
+    case SLOPPY:
+      return Bytecode::kDeletePropertySloppy;
+    case STRICT:
+      return Bytecode::kDeletePropertyStrict;
+    case STRONG:
+      UNIMPLEMENTED();
+    default:
+      UNREACHABLE();
+  }
+  return static_cast<Bytecode>(-1);
+}
+
+
+// static
 bool BytecodeArrayBuilder::FitsInIdx8Operand(int value) {
   return kMinUInt8 <= value && value <= kMaxUInt8;
 }
 
 
 // static
 bool BytecodeArrayBuilder::FitsInIdx8Operand(size_t value) {
   return value <= static_cast<size_t>(kMaxUInt8);
 }
 
@@ skipping 46 matching lines @@
   DCHECK_GT(next_consecutive_count_, 0);
   builder_->BorrowConsecutiveTemporaryRegister(next_consecutive_register_);
   allocated_.push_back(next_consecutive_register_);
   next_consecutive_count_--;
   return Register(next_consecutive_register_++);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8