v8/test/unittests/compiler/bytecode-analysis-unittest.cc
Ross McIlroy 7bedd1111d [Interpreter] Move ToBoolean elision in BytecodeGenerator.
Move the ToBoolean elision in the BytecodeGenerator instead of the
peephole optimizer. Adds a TypeHint mechanism to the ExpressionResult
to enable passing of type hints through the ast visitor.

BUG=v8:6194

Change-Id: Ic55506ba11b213f7459250004d3f18cab04ee9b3
Reviewed-on: https://chromium-review.googlesource.com/467208
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44415}
2017-04-05 16:51:28 +00:00

425 lines
13 KiB
C++

// 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/v8.h"
#include "src/compiler/bytecode-analysis.h"
#include "src/interpreter/bytecode-array-builder.h"
#include "src/interpreter/bytecode-array-iterator.h"
#include "src/interpreter/bytecode-decoder.h"
#include "src/interpreter/bytecode-label.h"
#include "src/interpreter/control-flow-builders.h"
#include "src/objects-inl.h"
#include "test/unittests/test-utils.h"
namespace v8 {
namespace internal {
namespace compiler {
using ToBooleanMode = interpreter::BytecodeArrayBuilder::ToBooleanMode;
class BytecodeAnalysisTest : public TestWithIsolateAndZone {
public:
BytecodeAnalysisTest() {}
~BytecodeAnalysisTest() override {}
static void SetUpTestCase() {
old_FLAG_ignition_peephole_ = i::FLAG_ignition_peephole;
i::FLAG_ignition_peephole = false;
old_FLAG_ignition_reo_ = i::FLAG_ignition_reo;
i::FLAG_ignition_reo = false;
TestWithIsolateAndZone::SetUpTestCase();
}
static void TearDownTestCase() {
TestWithIsolateAndZone::TearDownTestCase();
i::FLAG_ignition_peephole = old_FLAG_ignition_peephole_;
i::FLAG_ignition_reo = old_FLAG_ignition_reo_;
}
std::string ToLivenessString(const BytecodeLivenessState* liveness) const {
const BitVector& bit_vector = liveness->bit_vector();
std::string out;
out.resize(bit_vector.length());
for (int i = 0; i < bit_vector.length(); ++i) {
if (bit_vector.Contains(i)) {
out[i] = 'L';
} else {
out[i] = '.';
}
}
return out;
}
void EnsureLivenessMatches(
Handle<BytecodeArray> bytecode,
const std::vector<std::pair<std::string, std::string>>&
expected_liveness) {
BytecodeAnalysis analysis(bytecode, zone(), true);
analysis.Analyze(BailoutId::None());
interpreter::BytecodeArrayIterator iterator(bytecode);
for (auto liveness : expected_liveness) {
std::stringstream ss;
ss << std::setw(4) << iterator.current_offset() << " : ";
iterator.PrintTo(ss);
EXPECT_EQ(liveness.first, ToLivenessString(analysis.GetInLivenessFor(
iterator.current_offset())))
<< " at bytecode " << ss.str();
EXPECT_EQ(liveness.second, ToLivenessString(analysis.GetOutLivenessFor(
iterator.current_offset())))
<< " at bytecode " << ss.str();
iterator.Advance();
}
EXPECT_TRUE(iterator.done());
}
private:
static bool old_FLAG_ignition_peephole_;
static bool old_FLAG_ignition_reo_;
DISALLOW_COPY_AND_ASSIGN(BytecodeAnalysisTest);
};
bool BytecodeAnalysisTest::old_FLAG_ignition_peephole_;
bool BytecodeAnalysisTest::old_FLAG_ignition_reo_;
TEST_F(BytecodeAnalysisTest, EmptyBlock) {
interpreter::BytecodeArrayBuilder builder(isolate(), zone(), 3, 0, 3);
std::vector<std::pair<std::string, std::string>> expected_liveness;
interpreter::Register reg_0(0);
builder.Return();
expected_liveness.emplace_back("...L", "....");
Handle<BytecodeArray> bytecode = builder.ToBytecodeArray(isolate());
EnsureLivenessMatches(bytecode, expected_liveness);
}
TEST_F(BytecodeAnalysisTest, SimpleLoad) {
interpreter::BytecodeArrayBuilder builder(isolate(), zone(), 3, 0, 3);
std::vector<std::pair<std::string, std::string>> expected_liveness;
interpreter::Register reg_0(0);
builder.LoadAccumulatorWithRegister(reg_0);
expected_liveness.emplace_back("L...", "...L");
builder.Return();
expected_liveness.emplace_back("...L", "....");
Handle<BytecodeArray> bytecode = builder.ToBytecodeArray(isolate());
EnsureLivenessMatches(bytecode, expected_liveness);
}
TEST_F(BytecodeAnalysisTest, StoreThenLoad) {
interpreter::BytecodeArrayBuilder builder(isolate(), zone(), 3, 0, 3);
std::vector<std::pair<std::string, std::string>> expected_liveness;
interpreter::Register reg_0(0);
builder.StoreAccumulatorInRegister(reg_0);
expected_liveness.emplace_back("...L", "L...");
builder.LoadNull();
expected_liveness.emplace_back("L...", "L...");
builder.LoadAccumulatorWithRegister(reg_0);
expected_liveness.emplace_back("L...", "...L");
builder.Return();
expected_liveness.emplace_back("...L", "....");
Handle<BytecodeArray> bytecode = builder.ToBytecodeArray(isolate());
EnsureLivenessMatches(bytecode, expected_liveness);
}
TEST_F(BytecodeAnalysisTest, DiamondLoad) {
interpreter::BytecodeArrayBuilder builder(isolate(), zone(), 3, 0, 3);
std::vector<std::pair<std::string, std::string>> expected_liveness;
interpreter::Register reg_0(0);
interpreter::Register reg_1(1);
interpreter::Register reg_2(2);
interpreter::BytecodeLabel ld1_label;
interpreter::BytecodeLabel end_label;
builder.JumpIfTrue(ToBooleanMode::kConvertToBoolean, &ld1_label);
expected_liveness.emplace_back("LLLL", "LLL.");
builder.LoadAccumulatorWithRegister(reg_0);
expected_liveness.emplace_back("L.L.", "..L.");
builder.Jump(&end_label);
expected_liveness.emplace_back("..L.", "..L.");
builder.Bind(&ld1_label);
builder.LoadAccumulatorWithRegister(reg_1);
expected_liveness.emplace_back(".LL.", "..L.");
builder.Bind(&end_label);
builder.LoadAccumulatorWithRegister(reg_2);
expected_liveness.emplace_back("..L.", "...L");
builder.Return();
expected_liveness.emplace_back("...L", "....");
Handle<BytecodeArray> bytecode = builder.ToBytecodeArray(isolate());
EnsureLivenessMatches(bytecode, expected_liveness);
}
TEST_F(BytecodeAnalysisTest, DiamondLookupsAndBinds) {
interpreter::BytecodeArrayBuilder builder(isolate(), zone(), 3, 0, 3);
std::vector<std::pair<std::string, std::string>> expected_liveness;
interpreter::Register reg_0(0);
interpreter::Register reg_1(1);
interpreter::Register reg_2(2);
interpreter::BytecodeLabel ld1_label;
interpreter::BytecodeLabel end_label;
builder.StoreAccumulatorInRegister(reg_0);
expected_liveness.emplace_back(".LLL", "LLLL");
builder.JumpIfTrue(ToBooleanMode::kConvertToBoolean, &ld1_label);
expected_liveness.emplace_back("LLLL", "LLL.");
{
builder.LoadAccumulatorWithRegister(reg_0);
expected_liveness.emplace_back("L...", "...L");
builder.StoreAccumulatorInRegister(reg_2);
expected_liveness.emplace_back("...L", "..L.");
builder.Jump(&end_label);
expected_liveness.emplace_back("..L.", "..L.");
}
builder.Bind(&ld1_label);
{
builder.LoadAccumulatorWithRegister(reg_1);
expected_liveness.emplace_back(".LL.", "..L.");
}
builder.Bind(&end_label);
builder.LoadAccumulatorWithRegister(reg_2);
expected_liveness.emplace_back("..L.", "...L");
builder.Return();
expected_liveness.emplace_back("...L", "....");
Handle<BytecodeArray> bytecode = builder.ToBytecodeArray(isolate());
EnsureLivenessMatches(bytecode, expected_liveness);
}
TEST_F(BytecodeAnalysisTest, SimpleLoop) {
interpreter::BytecodeArrayBuilder builder(isolate(), zone(), 3, 0, 3);
std::vector<std::pair<std::string, std::string>> expected_liveness;
interpreter::Register reg_0(0);
interpreter::Register reg_1(1);
interpreter::Register reg_2(2);
builder.StoreAccumulatorInRegister(reg_0);
expected_liveness.emplace_back("..LL", "L.LL");
interpreter::LoopBuilder loop_builder(&builder);
loop_builder.LoopHeader();
{
builder.JumpIfTrue(ToBooleanMode::kConvertToBoolean,
loop_builder.break_labels()->New());
expected_liveness.emplace_back("L.LL", "L.L.");
builder.LoadAccumulatorWithRegister(reg_0);
expected_liveness.emplace_back("L...", "L..L");
builder.StoreAccumulatorInRegister(reg_2);
expected_liveness.emplace_back("L..L", "L.LL");
loop_builder.BindContinueTarget();
loop_builder.JumpToHeader(0);
expected_liveness.emplace_back("L.LL", "L.LL");
}
loop_builder.EndLoop();
builder.LoadAccumulatorWithRegister(reg_2);
expected_liveness.emplace_back("..L.", "...L");
builder.Return();
expected_liveness.emplace_back("...L", "....");
Handle<BytecodeArray> bytecode = builder.ToBytecodeArray(isolate());
EnsureLivenessMatches(bytecode, expected_liveness);
}
TEST_F(BytecodeAnalysisTest, TryCatch) {
interpreter::BytecodeArrayBuilder builder(isolate(), zone(), 3, 0, 3);
std::vector<std::pair<std::string, std::string>> expected_liveness;
interpreter::Register reg_0(0);
interpreter::Register reg_1(1);
interpreter::Register reg_context(2);
builder.StoreAccumulatorInRegister(reg_0);
expected_liveness.emplace_back(".LLL", "LLL.");
interpreter::TryCatchBuilder try_builder(&builder, HandlerTable::CAUGHT);
try_builder.BeginTry(reg_context);
{
builder.LoadAccumulatorWithRegister(reg_0);
expected_liveness.emplace_back("LLL.", ".LLL");
builder.StoreAccumulatorInRegister(reg_0);
expected_liveness.emplace_back(".LLL", ".LL.");
builder.CallRuntime(Runtime::kThrow);
expected_liveness.emplace_back(".LL.", ".LLL");
builder.StoreAccumulatorInRegister(reg_0);
// Star can't throw, so doesn't take handler liveness
expected_liveness.emplace_back("...L", "...L");
}
try_builder.EndTry();
expected_liveness.emplace_back("...L", "...L");
// Catch
{
builder.LoadAccumulatorWithRegister(reg_1);
expected_liveness.emplace_back(".L..", "...L");
}
try_builder.EndCatch();
builder.Return();
expected_liveness.emplace_back("...L", "....");
Handle<BytecodeArray> bytecode = builder.ToBytecodeArray(isolate());
EnsureLivenessMatches(bytecode, expected_liveness);
}
TEST_F(BytecodeAnalysisTest, DiamondInLoop) {
interpreter::BytecodeArrayBuilder builder(isolate(), zone(), 3, 0, 3);
std::vector<std::pair<std::string, std::string>> expected_liveness;
interpreter::Register reg_0(0);
interpreter::Register reg_1(1);
interpreter::Register reg_2(2);
builder.StoreAccumulatorInRegister(reg_0);
expected_liveness.emplace_back("...L", "L..L");
interpreter::LoopBuilder loop_builder(&builder);
loop_builder.LoopHeader();
{
builder.JumpIfTrue(ToBooleanMode::kConvertToBoolean,
loop_builder.break_labels()->New());
expected_liveness.emplace_back("L..L", "L..L");
interpreter::BytecodeLabel ld1_label;
interpreter::BytecodeLabel end_label;
builder.JumpIfTrue(ToBooleanMode::kConvertToBoolean, &ld1_label);
expected_liveness.emplace_back("L..L", "L..L");
{
builder.Jump(&end_label);
expected_liveness.emplace_back("L..L", "L..L");
}
builder.Bind(&ld1_label);
{
builder.LoadAccumulatorWithRegister(reg_0);
expected_liveness.emplace_back("L...", "L..L");
}
builder.Bind(&end_label);
loop_builder.BindContinueTarget();
loop_builder.JumpToHeader(0);
expected_liveness.emplace_back("L..L", "L..L");
}
loop_builder.EndLoop();
builder.Return();
expected_liveness.emplace_back("...L", "....");
Handle<BytecodeArray> bytecode = builder.ToBytecodeArray(isolate());
EnsureLivenessMatches(bytecode, expected_liveness);
}
TEST_F(BytecodeAnalysisTest, KillingLoopInsideLoop) {
interpreter::BytecodeArrayBuilder builder(isolate(), zone(), 3, 0, 3);
std::vector<std::pair<std::string, std::string>> expected_liveness;
interpreter::Register reg_0(0);
interpreter::Register reg_1(1);
builder.StoreAccumulatorInRegister(reg_0);
expected_liveness.emplace_back(".L.L", "LL..");
interpreter::LoopBuilder loop_builder(&builder);
loop_builder.LoopHeader();
{
builder.LoadAccumulatorWithRegister(reg_0);
expected_liveness.emplace_back("LL..", ".L..");
builder.LoadAccumulatorWithRegister(reg_1);
expected_liveness.emplace_back(".L..", ".L.L");
builder.JumpIfTrue(ToBooleanMode::kConvertToBoolean,
loop_builder.break_labels()->New());
expected_liveness.emplace_back(".L.L", ".L.L");
interpreter::LoopBuilder inner_loop_builder(&builder);
inner_loop_builder.LoopHeader();
{
builder.StoreAccumulatorInRegister(reg_0);
expected_liveness.emplace_back(".L.L", "LL.L");
builder.JumpIfTrue(ToBooleanMode::kConvertToBoolean,
inner_loop_builder.break_labels()->New());
expected_liveness.emplace_back("LL.L", "LL.L");
inner_loop_builder.BindContinueTarget();
inner_loop_builder.JumpToHeader(1);
expected_liveness.emplace_back(".L.L", ".L.L");
}
inner_loop_builder.EndLoop();
loop_builder.BindContinueTarget();
loop_builder.JumpToHeader(0);
expected_liveness.emplace_back("LL..", "LL..");
}
loop_builder.EndLoop();
builder.Return();
expected_liveness.emplace_back("...L", "....");
Handle<BytecodeArray> bytecode = builder.ToBytecodeArray(isolate());
EnsureLivenessMatches(bytecode, expected_liveness);
}
} // namespace compiler
} // namespace internal
} // namespace v8