[Interpreter] Unary operators - typeof, void, and logical not.

Implementations and tests for typeof, void, and logical not.

Add missing string type to Object::TypeOf.

BUG=v8:4280
LOG=NO

Review URL: https://codereview.chromium.org/1390483002

Cr-Commit-Position: refs/heads/master@{#31124}

src/compiler/bytecode-graph-builder.cc

@@ -338,6 +338,18 @@ void BytecodeGraphBuilder::VisitMod(
 }
 
 
+void BytecodeGraphBuilder::VisitLogicalNot(
+    const interpreter::BytecodeArrayIterator& iterator) {
+  UNIMPLEMENTED();
+}
+
+
+void BytecodeGraphBuilder::VisitTypeOf(
+    const interpreter::BytecodeArrayIterator& iterator) {
+  UNIMPLEMENTED();
+}
+
+
 void BytecodeGraphBuilder::VisitTestEqual(
     const interpreter::BytecodeArrayIterator& iterator) {
   UNIMPLEMENTED();

src/interpreter/bytecode-array-builder.cc

@@ -134,6 +134,18 @@ BytecodeArrayBuilder& BytecodeArrayBuilder::BinaryOperation(Token::Value op,
 }
 
 
+BytecodeArrayBuilder& BytecodeArrayBuilder::LogicalNot() {
+  Output(Bytecode::kLogicalNot);
+  return *this;
+}
+
+
+BytecodeArrayBuilder& BytecodeArrayBuilder::TypeOf() {
+  Output(Bytecode::kTypeOf);
+  return *this;
+}
+
+
 BytecodeArrayBuilder& BytecodeArrayBuilder::CompareOperation(
     Token::Value op, Register reg, LanguageMode language_mode) {
   if (!is_sloppy(language_mode)) {
@@ -299,6 +311,7 @@ BytecodeArrayBuilder& BytecodeArrayBuilder::CastAccumulatorToBoolean() {
         UNREACHABLE();
       case Bytecode::kLdaTrue:
       case Bytecode::kLdaFalse:
+      case Bytecode::kLogicalNot:
       case Bytecode::kTestEqual:
       case Bytecode::kTestNotEqual:
       case Bytecode::kTestEqualStrict:

src/interpreter/bytecode-array-builder.h

@@ -84,6 +84,10 @@ class BytecodeArrayBuilder {
   // Operators (register == lhs, accumulator = rhs).
   BytecodeArrayBuilder& BinaryOperation(Token::Value binop, Register reg);
 
+  // Unary Operators.
+  BytecodeArrayBuilder& LogicalNot();
+  BytecodeArrayBuilder& TypeOf();
+
   // Tests.
   BytecodeArrayBuilder& CompareOperation(Token::Value op, Register reg,
                                          LanguageMode language_mode);

src/interpreter/bytecode-generator.cc

@@ -619,8 +619,41 @@ void BytecodeGenerator::VisitCallRuntime(CallRuntime* expr) {
 }
 
 
+void BytecodeGenerator::VisitVoid(UnaryOperation* expr) {
+  Visit(expr->expression());
+  builder()->LoadUndefined();
+}
+
+
+void BytecodeGenerator::VisitTypeOf(UnaryOperation* expr) {
+  Visit(expr->expression());
+  builder()->TypeOf();
+}
+
+
+void BytecodeGenerator::VisitNot(UnaryOperation* expr) {
+  Visit(expr->expression());
+  builder()->LogicalNot();
+}
+
+
 void BytecodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
-  UNIMPLEMENTED();
+  switch (expr->op()) {
+    case Token::Value::NOT:
+      VisitNot(expr);
+      break;
+    case Token::Value::TYPEOF:
+      VisitTypeOf(expr);
+      break;
+    case Token::Value::VOID:
+      VisitVoid(expr);
+      break;
+    case Token::Value::BIT_NOT:
+    case Token::Value::DELETE:
+      UNIMPLEMENTED();
+    default:
+      UNREACHABLE();
+  }
 }
 
 

src/interpreter/bytecode-generator.h

@@ -34,6 +34,11 @@ class BytecodeGenerator : public AstVisitor {
   void VisitPropertyLoad(Register obj, Property* expr);
   void VisitVariableLoad(Variable* variable);
 
+  // Dispatched from VisitUnaryOperation.
+  void VisitVoid(UnaryOperation* expr);
+  void VisitTypeOf(UnaryOperation* expr);
+  void VisitNot(UnaryOperation* expr);
+
   inline BytecodeArrayBuilder* builder() { return &builder_; }
   inline Scope* scope() const { return scope_; }
   inline void set_scope(Scope* scope) { scope_ = scope; }

src/interpreter/bytecodes.h

@@ -65,6 +65,10 @@ namespace interpreter {
   V(Div, OperandType::kReg8)                                                  \
   V(Mod, OperandType::kReg8)                                                  \
                                                                               \
+  /* Unary Operators */                                                       \
+  V(LogicalNot, OperandType::kNone)                                           \
+  V(TypeOf, OperandType::kNone)                                               \
+                                                                              \
   /* Call operations. */                                                      \
   V(Call, OperandType::kReg8, OperandType::kReg8, OperandType::kCount8)       \
   V(CallRuntime, OperandType::kIdx16, OperandType::kReg8,                     \

src/interpreter/interpreter.cc

@@ -334,10 +334,34 @@ void Interpreter::DoMod(compiler::InterpreterAssembler* assembler) {
 }
 
 
+// LogicalNot
+//
+// Perform logical-not on the accumulator, first casting the
+// accumulator to a boolean value if required.
+void Interpreter::DoLogicalNot(compiler::InterpreterAssembler* assembler) {
+  Node* accumulator = __ GetAccumulator();
+  Node* result = __ CallRuntime(Runtime::kInterpreterLogicalNot, accumulator);
+  __ SetAccumulator(result);
+  __ Dispatch();
+}
+
+
+// TypeOf
+//
+// Load the accumulator with the string representating type of the
+// object in the accumulator.
+void Interpreter::DoTypeOf(compiler::InterpreterAssembler* assembler) {
+  Node* accumulator = __ GetAccumulator();
+  Node* result = __ CallRuntime(Runtime::kInterpreterTypeOf, accumulator);
+  __ SetAccumulator(result);
+  __ Dispatch();
+}
+
+
 // Call <callable> <receiver> <arg_count>
 //
-// Call a JSfunction or Callable in |callable| with receiver and |arg_count|
-// arguments in subsequent registers.
+// Call a JSfunction or Callable in |callable| with the |receiver| and
+// |arg_count| arguments in subsequent registers.
 void Interpreter::DoCall(compiler::InterpreterAssembler* assembler) {
   Node* function_reg = __ BytecodeOperandReg8(0);
   Node* function = __ LoadRegister(function_reg);
@@ -352,8 +376,9 @@ void Interpreter::DoCall(compiler::InterpreterAssembler* assembler) {
 
 // CallRuntime <function_id> <first_arg> <arg_count>
 //
-// Call the runtime function |function_id| with first argument in register
-// |first_arg| and |arg_count| arguments in subsequent registers.
+// Call the runtime function |function_id| with the first argument in
+// register |first_arg| and |arg_count| arguments in subsequent
+// registers.
 void Interpreter::DoCallRuntime(compiler::InterpreterAssembler* assembler) {
   Node* function_id = __ BytecodeOperandIdx16(0);
   Node* first_arg_reg = __ BytecodeOperandReg8(1);
@@ -457,15 +482,16 @@ void Interpreter::DoTestInstanceOf(compiler::InterpreterAssembler* assembler) {
 //
 // Cast the object referenced by the accumulator to a boolean.
 void Interpreter::DoToBoolean(compiler::InterpreterAssembler* assembler) {
-  // TODO(oth): The next CL for test operations has interpreter specific
-  // runtime calls. This looks like another candidate.
+  Node* accumulator = __ GetAccumulator();
+  Node* result = __ CallRuntime(Runtime::kInterpreterToBoolean, accumulator);
+  __ SetAccumulator(result);
   __ Dispatch();
 }
 
 
 // Jump <imm8>
 //
-// Jump by number of bytes represented by an immediate operand.
+// Jump by number of bytes represented by the immediate operand |imm8|.
 void Interpreter::DoJump(compiler::InterpreterAssembler* assembler) {
   Node* relative_jump = __ BytecodeOperandImm8(0);
   __ Jump(relative_jump);
@@ -539,7 +565,7 @@ void Interpreter::DoJumpIfFalseConstant(
 
 // Return
 //
-// Return the value in register 0.
+// Return the value in the accumulator.
 void Interpreter::DoReturn(compiler::InterpreterAssembler* assembler) {
   __ Return();
 }

src/objects.cc

@@ -381,6 +381,7 @@ Handle<String> Object::TypeOf(Isolate* isolate, Handle<Object> object) {
     return isolate->factory()->undefined_string();
   }
   if (object->IsBoolean()) return isolate->factory()->boolean_string();
+  if (object->IsString()) return isolate->factory()->string_string();
   if (object->IsSymbol()) return isolate->factory()->symbol_string();
 #define SIMD128_TYPE(TYPE, Type, type, lane_count, lane_type) \
   if (object->Is##Type()) return isolate->factory()->type##_string();

src/runtime/runtime-interpreter.cc

@@ -96,7 +96,7 @@ RUNTIME_FUNCTION(Runtime_InterpreterGreaterThanOrEqual) {
 
 
 RUNTIME_FUNCTION(Runtime_InterpreterStrictEquals) {
-  SealHandleScope scope(isolate);
+  SealHandleScope shs(isolate);
   DCHECK_EQ(2, args.length());
   CONVERT_ARG_CHECKED(Object, x, 0);
   CONVERT_ARG_CHECKED(Object, y, 1);
@@ -105,7 +105,7 @@ RUNTIME_FUNCTION(Runtime_InterpreterStrictEquals) {
 
 
 RUNTIME_FUNCTION(Runtime_InterpreterStrictNotEquals) {
-  SealHandleScope scope(isolate);
+  SealHandleScope shs(isolate);
   DCHECK_EQ(2, args.length());
   CONVERT_ARG_CHECKED(Object, x, 0);
   CONVERT_ARG_CHECKED(Object, y, 1);
@@ -114,12 +114,28 @@ RUNTIME_FUNCTION(Runtime_InterpreterStrictNotEquals) {
 
 
 RUNTIME_FUNCTION(Runtime_InterpreterToBoolean) {
-  SealHandleScope scope(isolate);
+  SealHandleScope shs(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_CHECKED(Object, x, 0);
   return isolate->heap()->ToBoolean(x->BooleanValue());
 }
 
 
+RUNTIME_FUNCTION(Runtime_InterpreterLogicalNot) {
+  SealHandleScope shs(isolate);
+  DCHECK_EQ(1, args.length());
+  CONVERT_ARG_CHECKED(Object, x, 0);
+  return isolate->heap()->ToBoolean(!x->BooleanValue());
+}
+
+
+RUNTIME_FUNCTION(Runtime_InterpreterTypeOf) {
+  SealHandleScope shs(isolate);
+  DCHECK_EQ(1, args.length());
+  CONVERT_ARG_HANDLE_CHECKED(Object, x, 0);
+  return Object::cast(*Object::TypeOf(isolate, x));
+}
+
+
 }  // namespace internal
 }  // namespace v8

src/runtime/runtime.h

@@ -225,7 +225,9 @@ namespace internal {
   F(InterpreterGreaterThan, 2, 1)         \
   F(InterpreterLessThanOrEqual, 2, 1)     \
   F(InterpreterGreaterThanOrEqual, 2, 1)  \
-  F(InterpreterToBoolean, 1, 1)
+  F(InterpreterToBoolean, 1, 1)           \
+  F(InterpreterLogicalNot, 1, 1)          \
+  F(InterpreterTypeOf, 1, 1)
 
 
 #define FOR_EACH_INTRINSIC_FUNCTION(F)                      \

test/cctest/interpreter/test-bytecode-generator.cc

@@ -1260,6 +1260,124 @@ TEST(BasicLoops) {
   }
 }
 
+
+TEST(UnaryOperators) {
+  InitializedHandleScope handle_scope;
+  BytecodeGeneratorHelper helper;
+
+  ExpectedSnippet<int> snippets[] = {
+      {"var x = 0;"
+       "while (x != 10) {"
+       "  x = x + 10;"
+       "}"
+       "return x;",
+       2 * kPointerSize,
+       1,
+       29,
+       {
+           B(LdaZero),              //
+           B(Star), R(0),           //
+           B(Jump), U8(12),         //
+           B(Ldar), R(0),           //
+           B(Star), R(1),           //
+           B(LdaSmi8), U8(10),      //
+           B(Add), R(1),            //
+           B(Star), R(0),           //
+           B(Ldar), R(0),           //
+           B(Star), R(1),           //
+           B(LdaSmi8), U8(10),      //
+           B(TestEqual), R(1),      //
+           B(LogicalNot),           //
+           B(JumpIfTrue), U8(-19),  //
+           B(Ldar), R(0),           //
+           B(Return),               //
+       },
+       0},
+      {"var x = false;"
+       "do {"
+       "  x = !x;"
+       "} while(x == false);"
+       "return x;",
+       2 * kPointerSize,
+       1,
+       20,
+       {
+           B(LdaFalse),             //
+           B(Star), R(0),           //
+           B(Ldar), R(0),           //
+           B(LogicalNot),           //
+           B(Star), R(0),           //
+           B(Ldar), R(0),           //
+           B(Star), R(1),           //
+           B(LdaFalse),             //
+           B(TestEqual), R(1),      //
+           B(JumpIfTrue), U8(-12),  //
+           B(Ldar), R(0),           //
+           B(Return),               //
+       },
+       0},
+      {"var x = 101;"
+       "return void(x * 3);",
+       2 * kPointerSize,
+       1,
+       14,
+       {
+           B(LdaSmi8), U8(101),  //
+           B(Star), R(0),        //
+           B(Ldar), R(0),        //
+           B(Star), R(1),        //
+           B(LdaSmi8), U8(3),    //
+           B(Mul), R(1),         //
+           B(LdaUndefined),      //
+           B(Return),            //
+       },
+       0},
+      {"var x = 1234;"
+       "var y = void (x * x - 1);"
+       "return y;",
+       4 * kPointerSize,
+       1,
+       24,
+       {
+           B(LdaConstant), U8(0),  //
+           B(Star), R(0),          //
+           B(Ldar), R(0),          //
+           B(Star), R(3),          //
+           B(Ldar), R(0),          //
+           B(Mul), R(3),           //
+           B(Star), R(2),          //
+           B(LdaSmi8), U8(1),      //
+           B(Sub), R(2),           //
+           B(LdaUndefined),        //
+           B(Star), R(1),          //
+           B(Ldar), R(1),          //
+           B(Return),              //
+       },
+       1,
+       {1234}},
+      {"var x = 13;"
+       "return typeof(x);",
+       1 * kPointerSize,
+       1,
+       8,
+       {
+           B(LdaSmi8), U8(13),  //
+           B(Star), R(0),       //
+           B(Ldar), R(0),       //
+           B(TypeOf),           //
+           B(Return),           //
+       },
+       0},
+  };
+
+  for (size_t i = 0; i < arraysize(snippets); i++) {
+    Handle<BytecodeArray> bytecode_array =
+        helper.MakeBytecodeForFunctionBody(snippets[i].code_snippet);
+    CheckBytecodeArrayEqual(snippets[i], bytecode_array);
+  }
+}
+
+
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8

test/cctest/interpreter/test-interpreter.cc

@@ -1291,6 +1291,164 @@ TEST(InterpreterTestIn) {
 }
 
 
+TEST(InterpreterUnaryNot) {
+  HandleAndZoneScope handles;
+  for (size_t i = 1; i < 10; i++) {
+    bool expected_value = ((i & 1) == 1);
+    BytecodeArrayBuilder builder(handles.main_isolate(), handles.main_zone());
+    Register r0(0);
+    builder.set_locals_count(0);
+    builder.set_parameter_count(0);
+    builder.EnterBlock();
+    builder.LoadFalse();
+    for (size_t j = 0; j < i; j++) {
+      builder.LogicalNot();
+    }
+    builder.LeaveBlock().Return();
+    Handle<BytecodeArray> bytecode_array = builder.ToBytecodeArray();
+    InterpreterTester tester(handles.main_isolate(), bytecode_array);
+    auto callable = tester.GetCallable<>();
+    Handle<Object> return_value = callable().ToHandleChecked();
+    CHECK(return_value->IsBoolean());
+    CHECK_EQ(return_value->BooleanValue(), expected_value);
+  }
+}
+
+
+static void LoadAny(BytecodeArrayBuilder* builder,
+                    v8::internal::Factory* factory, Handle<Object> obj) {
+  if (obj->IsOddball()) {
+    if (obj->SameValue(*factory->true_value())) {
+      builder->LoadTrue();
+    } else if (obj->SameValue(*factory->false_value())) {
+      builder->LoadFalse();
+    } else if (obj->SameValue(*factory->the_hole_value())) {
+      builder->LoadTheHole();
+    } else if (obj->SameValue(*factory->null_value())) {
+      builder->LoadNull();
+    } else if (obj->SameValue(*factory->undefined_value())) {
+      builder->LoadUndefined();
+    } else {
+      UNREACHABLE();
+    }
+  } else if (obj->IsSmi()) {
+    builder->LoadLiteral(*Handle<Smi>::cast(obj));
+  } else {
+    builder->LoadLiteral(obj);
+  }
+}
+
+
+TEST(InterpreterToBoolean) {
+  HandleAndZoneScope handles;
+  i::Factory* factory = handles.main_isolate()->factory();
+
+  std::pair<Handle<Object>, bool> object_type_tuples[] = {
+      std::make_pair(factory->undefined_value(), false),
+      std::make_pair(factory->null_value(), false),
+      std::make_pair(factory->false_value(), false),
+      std::make_pair(factory->true_value(), true),
+      std::make_pair(factory->NewNumber(9.1), true),
+      std::make_pair(factory->NewNumberFromInt(0), false),
+      std::make_pair(
+          Handle<Object>::cast(factory->NewStringFromStaticChars("hello")),
+          true),
+      std::make_pair(
+          Handle<Object>::cast(factory->NewStringFromStaticChars("")), false),
+  };
+
+  for (size_t i = 0; i < arraysize(object_type_tuples); i++) {
+    BytecodeArrayBuilder builder(handles.main_isolate(), handles.main_zone());
+    Register r0(0);
+    builder.set_locals_count(0);
+    builder.set_parameter_count(0);
+    builder.EnterBlock();
+    LoadAny(&builder, factory, object_type_tuples[i].first);
+    builder.CastAccumulatorToBoolean();
+    builder.LeaveBlock().Return();
+    Handle<BytecodeArray> bytecode_array = builder.ToBytecodeArray();
+    InterpreterTester tester(handles.main_isolate(), bytecode_array);
+    auto callable = tester.GetCallable<>();
+    Handle<Object> return_value = callable().ToHandleChecked();
+    CHECK(return_value->IsBoolean());
+    CHECK_EQ(return_value->BooleanValue(), object_type_tuples[i].second);
+  }
+}
+
+
+TEST(InterpreterUnaryNotNonBoolean) {
+  HandleAndZoneScope handles;
+  i::Factory* factory = handles.main_isolate()->factory();
+
+  std::pair<Handle<Object>, bool> object_type_tuples[] = {
+      std::make_pair(factory->undefined_value(), true),
+      std::make_pair(factory->null_value(), true),
+      std::make_pair(factory->false_value(), true),
+      std::make_pair(factory->true_value(), false),
+      std::make_pair(factory->NewNumber(9.1), false),
+      std::make_pair(factory->NewNumberFromInt(0), true),
+      std::make_pair(
+          Handle<Object>::cast(factory->NewStringFromStaticChars("hello")),
+          false),
+      std::make_pair(
+          Handle<Object>::cast(factory->NewStringFromStaticChars("")), true),
+  };
+
+  for (size_t i = 0; i < arraysize(object_type_tuples); i++) {
+    BytecodeArrayBuilder builder(handles.main_isolate(), handles.main_zone());
+    Register r0(0);
+    builder.set_locals_count(0);
+    builder.set_parameter_count(0);
+    builder.EnterBlock();
+    LoadAny(&builder, factory, object_type_tuples[i].first);
+    builder.LogicalNot();
+    builder.LeaveBlock().Return();
+    Handle<BytecodeArray> bytecode_array = builder.ToBytecodeArray();
+    InterpreterTester tester(handles.main_isolate(), bytecode_array);
+    auto callable = tester.GetCallable<>();
+    Handle<Object> return_value = callable().ToHandleChecked();
+    CHECK(return_value->IsBoolean());
+    CHECK_EQ(return_value->BooleanValue(), object_type_tuples[i].second);
+  }
+}
+
+
+TEST(InterpreterTypeOf) {
+  HandleAndZoneScope handles;
+  i::Factory* factory = handles.main_isolate()->factory();
+
+  std::pair<Handle<Object>, const char*> object_type_tuples[] = {
+      std::make_pair(factory->undefined_value(), "undefined"),
+      std::make_pair(factory->null_value(), "object"),
+      std::make_pair(factory->true_value(), "boolean"),
+      std::make_pair(factory->false_value(), "boolean"),
+      std::make_pair(factory->NewNumber(9.1), "number"),
+      std::make_pair(factory->NewNumberFromInt(7771), "number"),
+      std::make_pair(
+          Handle<Object>::cast(factory->NewStringFromStaticChars("hello")),
+          "string"),
+  };
+
+  for (size_t i = 0; i < arraysize(object_type_tuples); i++) {
+    BytecodeArrayBuilder builder(handles.main_isolate(), handles.main_zone());
+    Register r0(0);
+    builder.set_locals_count(0);
+    builder.set_parameter_count(0);
+    builder.EnterBlock();
+    LoadAny(&builder, factory, object_type_tuples[i].first);
+    builder.TypeOf();
+    builder.LeaveBlock().Return();
+    Handle<BytecodeArray> bytecode_array = builder.ToBytecodeArray();
+    InterpreterTester tester(handles.main_isolate(), bytecode_array);
+    auto callable = tester.GetCallable<>();
+    Handle<v8::internal::String> return_value =
+        Handle<v8::internal::String>::cast(callable().ToHandleChecked());
+    auto actual = return_value->ToCString();
+    CHECK_EQ(strcmp(&actual[0], object_type_tuples[i].second), 0);
+  }
+}
+
+
 TEST(InterpreterCallRuntime) {
   HandleAndZoneScope handles;
 

test/unittests/interpreter/bytecode-array-builder-unittest.cc

@@ -60,6 +60,9 @@ TEST_F(BytecodeArrayBuilderTest, AllBytecodesGenerated) {
       .BinaryOperation(Token::Value::DIV, reg)
       .BinaryOperation(Token::Value::MOD, reg);
 
+  // Emit unary operator invocations.
+  builder.LogicalNot().TypeOf();
+
   // Emit test operator invocations.
   builder.CompareOperation(Token::Value::EQ, reg, LanguageMode::SLOPPY)
       .CompareOperation(Token::Value::NE, reg, LanguageMode::SLOPPY)