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v8/test/cctest/compiler/test-code-stub-assembler.cc
bmeurer eaa92feb9a [builtins] Migrate Math.clz32 to a TurboFan builtin. 
This allows us to remove the troublesome %_MathClz32 intrinsic and also
allows us to utilize the functionality that is already available in
TurboFan. Also introduce a proper NumberClz32 operator so we don't need
to introduce a machine operator at the JS level.

R=epertoso@chromium.org

Review URL: https://codereview.chromium.org/1852553003

Cr-Commit-Position: refs/heads/master@{#35208}
2016-04-01 14:36:32 +00:00

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// 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/interface-descriptors.h"
#include "src/isolate.h"
#include "test/cctest/compiler/function-tester.h"
namespace v8 {
namespace internal {
namespace compiler {
class CodeStubAssemblerTester : public CodeStubAssembler {
public:
// Test generating code for a stub.
CodeStubAssemblerTester(Isolate* isolate,
const CallInterfaceDescriptor& descriptor)
: CodeStubAssembler(isolate, isolate->runtime_zone(), descriptor,
Code::ComputeFlags(Code::STUB), "test"),
scope_(isolate) {}
// Test generating code for a JS function (e.g. builtins).
CodeStubAssemblerTester(Isolate* isolate, int parameter_count)
: CodeStubAssembler(isolate, isolate->runtime_zone(), parameter_count,
Code::ComputeFlags(Code::FUNCTION), "test"),
scope_(isolate) {}
private:
HandleScope scope_;
LocalContext context_;
};
TEST(SimpleSmiReturn) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
m.Return(m.SmiTag(m.Int32Constant(37)));
Handle<Code> code = m.GenerateCode();
FunctionTester ft(descriptor, code);
MaybeHandle<Object> result = ft.Call();
CHECK_EQ(37, Handle<Smi>::cast(result.ToHandleChecked())->value());
}
TEST(SimpleIntPtrReturn) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
int test;
m.Return(m.IntPtrConstant(reinterpret_cast<intptr_t>(&test)));
Handle<Code> code = m.GenerateCode();
FunctionTester ft(descriptor, code);
MaybeHandle<Object> result = ft.Call();
CHECK_EQ(reinterpret_cast<intptr_t>(&test),
reinterpret_cast<intptr_t>(*result.ToHandleChecked()));
}
TEST(SimpleDoubleReturn) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
m.Return(m.NumberConstant(0.5));
Handle<Code> code = m.GenerateCode();
FunctionTester ft(descriptor, code);
MaybeHandle<Object> result = ft.Call();
CHECK_EQ(0.5, Handle<HeapNumber>::cast(result.ToHandleChecked())->value());
}
TEST(SimpleCallRuntime1Arg) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
Node* context = m.HeapConstant(Handle<Context>(isolate->native_context()));
Node* b = m.SmiTag(m.Int32Constant(0));
m.Return(m.CallRuntime(Runtime::kNumberToSmi, context, b));
Handle<Code> code = m.GenerateCode();
FunctionTester ft(descriptor, code);
MaybeHandle<Object> result = ft.Call();
CHECK_EQ(0, Handle<Smi>::cast(result.ToHandleChecked())->value());
}
TEST(SimpleTailCallRuntime1Arg) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
Node* context = m.HeapConstant(Handle<Context>(isolate->native_context()));
Node* b = m.SmiTag(m.Int32Constant(0));
m.TailCallRuntime(Runtime::kNumberToSmi, context, b);
Handle<Code> code = m.GenerateCode();
FunctionTester ft(descriptor, code);
MaybeHandle<Object> result = ft.Call();
CHECK_EQ(0, Handle<Smi>::cast(result.ToHandleChecked())->value());
}
TEST(SimpleCallRuntime2Arg) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
Node* context = m.HeapConstant(Handle<Context>(isolate->native_context()));
Node* a = m.SmiTag(m.Int32Constant(2));
Node* b = m.SmiTag(m.Int32Constant(4));
m.Return(m.CallRuntime(Runtime::kMathPow, context, a, b));
Handle<Code> code = m.GenerateCode();
FunctionTester ft(descriptor, code);
MaybeHandle<Object> result = ft.Call();
CHECK_EQ(16, Handle<Smi>::cast(result.ToHandleChecked())->value());
}
TEST(SimpleTailCallRuntime2Arg) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
Node* context = m.HeapConstant(Handle<Context>(isolate->native_context()));
Node* a = m.SmiTag(m.Int32Constant(2));
Node* b = m.SmiTag(m.Int32Constant(4));
m.TailCallRuntime(Runtime::kMathPow, context, a, b);
Handle<Code> code = m.GenerateCode();
FunctionTester ft(descriptor, code);
MaybeHandle<Object> result = ft.Call();
CHECK_EQ(16, Handle<Smi>::cast(result.ToHandleChecked())->value());
}
TEST(VariableMerge1) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
CodeStubAssembler::Variable var1(&m, MachineRepresentation::kTagged);
CodeStubAssembler::Label l1(&m), l2(&m), merge(&m);
Node* temp = m.Int32Constant(0);
var1.Bind(temp);
m.Branch(m.Int32Constant(1), &l1, &l2);
m.Bind(&l1);
CHECK_EQ(var1.value(), temp);
m.Goto(&merge);
m.Bind(&l2);
CHECK_EQ(var1.value(), temp);
m.Goto(&merge);
m.Bind(&merge);
CHECK_EQ(var1.value(), temp);
}
TEST(VariableMerge2) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
CodeStubAssembler::Variable var1(&m, MachineRepresentation::kTagged);
CodeStubAssembler::Label l1(&m), l2(&m), merge(&m);
Node* temp = m.Int32Constant(0);
var1.Bind(temp);
m.Branch(m.Int32Constant(1), &l1, &l2);
m.Bind(&l1);
CHECK_EQ(var1.value(), temp);
m.Goto(&merge);
m.Bind(&l2);
Node* temp2 = m.Int32Constant(2);
var1.Bind(temp2);
CHECK_EQ(var1.value(), temp2);
m.Goto(&merge);
m.Bind(&merge);
CHECK_NE(var1.value(), temp);
}
TEST(VariableMerge3) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
CodeStubAssembler::Variable var1(&m, MachineRepresentation::kTagged);
CodeStubAssembler::Variable var2(&m, MachineRepresentation::kTagged);
CodeStubAssembler::Label l1(&m), l2(&m), merge(&m);
Node* temp = m.Int32Constant(0);
var1.Bind(temp);
var2.Bind(temp);
m.Branch(m.Int32Constant(1), &l1, &l2);
m.Bind(&l1);
CHECK_EQ(var1.value(), temp);
m.Goto(&merge);
m.Bind(&l2);
Node* temp2 = m.Int32Constant(2);
var1.Bind(temp2);
CHECK_EQ(var1.value(), temp2);
m.Goto(&merge);
m.Bind(&merge);
CHECK_NE(var1.value(), temp);
CHECK_NE(var1.value(), temp2);
CHECK_EQ(var2.value(), temp);
}
TEST(VariableMergeBindFirst) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
CodeStubAssembler::Variable var1(&m, MachineRepresentation::kTagged);
CodeStubAssembler::Label l1(&m), l2(&m), merge(&m, &var1), end(&m);
Node* temp = m.Int32Constant(0);
var1.Bind(temp);
m.Branch(m.Int32Constant(1), &l1, &l2);
m.Bind(&l1);
CHECK_EQ(var1.value(), temp);
m.Goto(&merge);
m.Bind(&merge);
CHECK(var1.value() != temp);
CHECK(var1.value() != nullptr);
m.Goto(&end);
m.Bind(&l2);
Node* temp2 = m.Int32Constant(2);
var1.Bind(temp2);
CHECK_EQ(var1.value(), temp2);
m.Goto(&merge);
m.Bind(&end);
CHECK(var1.value() != temp);
CHECK(var1.value() != nullptr);
}
TEST(VariableMergeSwitch) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
CodeStubAssembler::Variable var1(&m, MachineRepresentation::kTagged);
CodeStubAssembler::Label l1(&m), l2(&m), default_label(&m);
CodeStubAssembler::Label* labels[] = {&l1, &l2};
int32_t values[] = {1, 2};
Node* temp = m.Int32Constant(0);
var1.Bind(temp);
m.Switch(m.Int32Constant(2), &default_label, values, labels, 2);
m.Bind(&l1);
DCHECK_EQ(temp, var1.value());
m.Return(temp);
m.Bind(&l2);
DCHECK_EQ(temp, var1.value());
m.Return(temp);
m.Bind(&default_label);
DCHECK_EQ(temp, var1.value());
m.Return(temp);
}
TEST(FixedArrayAccessSmiIndex) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
Handle<FixedArray> array = isolate->factory()->NewFixedArray(5);
array->set(4, Smi::FromInt(733));
m.Return(m.LoadFixedArrayElementSmiIndex(m.HeapConstant(array),
m.SmiTag(m.Int32Constant(4))));
Handle<Code> code = m.GenerateCode();
FunctionTester ft(descriptor, code);
MaybeHandle<Object> result = ft.Call();
CHECK_EQ(733, Handle<Smi>::cast(result.ToHandleChecked())->value());
}
TEST(LoadHeapNumberValue) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
Handle<HeapNumber> number = isolate->factory()->NewHeapNumber(1234);
m.Return(m.SmiTag(
m.ChangeFloat64ToUint32(m.LoadHeapNumberValue(m.HeapConstant(number)))));
Handle<Code> code = m.GenerateCode();
FunctionTester ft(descriptor, code);
MaybeHandle<Object> result = ft.Call();
CHECK_EQ(1234, Handle<Smi>::cast(result.ToHandleChecked())->value());
}
TEST(LoadInstanceType) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
Handle<HeapObject> undefined = isolate->factory()->undefined_value();
m.Return(m.SmiTag(m.LoadInstanceType(m.HeapConstant(undefined))));
Handle<Code> code = m.GenerateCode();
FunctionTester ft(descriptor, code);
MaybeHandle<Object> result = ft.Call();
CHECK_EQ(InstanceType::ODDBALL_TYPE,
Handle<Smi>::cast(result.ToHandleChecked())->value());
}
namespace {
class TestBitField : public BitField<unsigned, 3, 3> {};
} // namespace
TEST(BitFieldDecode) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
m.Return(m.SmiTag(m.BitFieldDecode<TestBitField>(m.Int32Constant(0x2f))));
Handle<Code> code = m.GenerateCode();
FunctionTester ft(descriptor, code);
MaybeHandle<Object> result = ft.Call();
// value = 00101111
// mask = 00111000
// result = 101
CHECK_EQ(5, Handle<Smi>::cast(result.ToHandleChecked())->value());
}
namespace {
Handle<JSFunction> CreateFunctionFromCode(int parameter_count_with_receiver,
Handle<Code> code) {
Isolate* isolate = code->GetIsolate();
Handle<String> name = isolate->factory()->InternalizeUtf8String("test");
Handle<JSFunction> function =
isolate->factory()->NewFunctionWithoutPrototype(name, code);
function->shared()->set_internal_formal_parameter_count(
parameter_count_with_receiver - 1); // Implicit undefined receiver.
return function;
}
} // namespace
TEST(JSFunction) {
const int kNumParams = 3; // Receiver, left, right.
Isolate* isolate(CcTest::InitIsolateOnce());
CodeStubAssemblerTester m(isolate, kNumParams);
m.Return(m.SmiTag(m.Int32Add(m.SmiToWord32(m.Parameter(1)),
m.SmiToWord32(m.Parameter(2)))));
Handle<Code> code = m.GenerateCode();
Handle<JSFunction> function = CreateFunctionFromCode(kNumParams, code);
Handle<Object> args[] = {Handle<Smi>(Smi::FromInt(23), isolate),
Handle<Smi>(Smi::FromInt(34), isolate)};
MaybeHandle<Object> result =
Execution::Call(isolate, function, isolate->factory()->undefined_value(),
arraysize(args), args);
CHECK_EQ(57, Handle<Smi>::cast(result.ToHandleChecked())->value());
}
TEST(SplitEdgeBranchMerge) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
CodeStubAssembler::Label l1(&m), merge(&m);
m.Branch(m.Int32Constant(1), &l1, &merge);
m.Bind(&l1);
m.Goto(&merge);
m.Bind(&merge);
USE(m.GenerateCode());
}
TEST(SplitEdgeSwitchMerge) {
Isolate* isolate(CcTest::InitIsolateOnce());
VoidDescriptor descriptor(isolate);
CodeStubAssemblerTester m(isolate, descriptor);
CodeStubAssembler::Label l1(&m), l2(&m), l3(&m), default_label(&m);
CodeStubAssembler::Label* labels[] = {&l1, &l2};
int32_t values[] = {1, 2};
m.Branch(m.Int32Constant(1), &l3, &l1);
m.Bind(&l3);
m.Switch(m.Int32Constant(2), &default_label, values, labels, 2);
m.Bind(&l1);
m.Goto(&l2);
m.Bind(&l2);
m.Goto(&default_label);
m.Bind(&default_label);
USE(m.GenerateCode());
}
} // namespace compiler
} // namespace internal
} // namespace v8
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