| // 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/v8.h" |
| |
| #include "src/interpreter/bytecode-array-builder.h" |
| #include "test/cctest/cctest.h" |
| |
| using namespace v8::internal; |
| using namespace v8::internal::interpreter; |
| |
| TEST(AllBytecodesGenerated) { |
| InitializedHandleScope handle_scope; |
| BytecodeArrayBuilder builder(handle_scope.main_isolate()); |
| |
| builder.set_locals_count(1); |
| CHECK_EQ(builder.locals_count(), 1); |
| |
| // Emit constant loads. |
| builder.LoadLiteral(Smi::FromInt(0)) |
| .LoadLiteral(Smi::FromInt(8)) |
| .LoadUndefined() |
| .LoadNull() |
| .LoadTheHole() |
| .LoadTrue() |
| .LoadFalse(); |
| |
| // Emit accumulator transfers. |
| builder.LoadAccumulatorWithRegister(0).StoreAccumulatorInRegister(0); |
| |
| // Emit binary operators invocations. |
| builder.BinaryOperation(Token::Value::ADD, 0) |
| .BinaryOperation(Token::Value::SUB, 0) |
| .BinaryOperation(Token::Value::MUL, 0) |
| .BinaryOperation(Token::Value::DIV, 0); |
| |
| // Emit control flow. Return must be the last instruction. |
| builder.Return(); |
| |
| // Generate BytecodeArray. |
| Handle<BytecodeArray> the_array = builder.ToBytecodeArray(); |
| CHECK_EQ(the_array->frame_size(), builder.locals_count() * kPointerSize); |
| |
| // Build scorecard of bytecodes encountered in the BytecodeArray. |
| std::vector<int> scorecard(Bytecodes::ToByte(Bytecode::kLast) + 1); |
| Bytecode final_bytecode = Bytecode::kLdaZero; |
| for (int i = 0; i < the_array->length(); i++) { |
| uint8_t code = the_array->get(i); |
| scorecard[code] += 1; |
| int operands = Bytecodes::NumberOfOperands(Bytecodes::FromByte(code)); |
| CHECK_LE(operands, Bytecodes::MaximumNumberOfOperands()); |
| final_bytecode = Bytecodes::FromByte(code); |
| i += operands; |
| } |
| |
| // Check return occurs at the end and only once in the BytecodeArray. |
| CHECK_EQ(final_bytecode, Bytecode::kReturn); |
| CHECK_EQ(scorecard[Bytecodes::ToByte(final_bytecode)], 1); |
| |
| #define CHECK_BYTECODE_PRESENT(Name, ...) \ |
| /* Check Bytecode is marked in scorecard */ \ |
| CHECK_GE(scorecard[Bytecodes::ToByte(Bytecode::k##Name)], 1); |
| BYTECODE_LIST(CHECK_BYTECODE_PRESENT) |
| #undef CHECK_BYTECODE_PRESENT |
| } |
| |
| |
| TEST(FrameSizesLookGood) { |
| for (int locals = 0; locals < 5; locals++) { |
| for (int temps = 0; temps < 3; temps++) { |
| InitializedHandleScope handle_scope; |
| BytecodeArrayBuilder builder(handle_scope.main_isolate()); |
| builder.set_locals_count(locals); |
| builder.Return(); |
| |
| TemporaryRegisterScope temporaries(&builder); |
| for (int i = 0; i < temps; i++) { |
| temporaries.NewRegister(); |
| } |
| |
| Handle<BytecodeArray> the_array = builder.ToBytecodeArray(); |
| int total_registers = locals + temps; |
| CHECK_EQ(the_array->frame_size(), total_registers * kPointerSize); |
| } |
| } |
| } |
| |
| |
| TEST(TemporariesRecycled) { |
| InitializedHandleScope handle_scope; |
| BytecodeArrayBuilder builder(handle_scope.main_isolate()); |
| builder.set_locals_count(0); |
| builder.Return(); |
| |
| int first; |
| { |
| TemporaryRegisterScope temporaries(&builder); |
| first = temporaries.NewRegister(); |
| temporaries.NewRegister(); |
| temporaries.NewRegister(); |
| temporaries.NewRegister(); |
| } |
| |
| int second; |
| { |
| TemporaryRegisterScope temporaries(&builder); |
| second = temporaries.NewRegister(); |
| } |
| |
| CHECK_EQ(first, second); |
| } |