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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/compiler/linkage.h"
#include "src/compiler/tail-call-optimization.h"
#include "test/unittests/compiler/graph-unittest.h"
#include "test/unittests/compiler/node-test-utils.h"
namespace v8 {
namespace internal {
namespace compiler {
class TailCallOptimizationTest : public GraphTest {
public:
explicit TailCallOptimizationTest(int num_parameters = 1)
: GraphTest(num_parameters) {}
~TailCallOptimizationTest() override {}
protected:
Reduction Reduce(Node* node) {
TailCallOptimization tco(common(), graph());
return tco.Reduce(node);
}
};
TEST_F(TailCallOptimizationTest, CallCodeObject0) {
MachineType kMachineSignature[] = {MachineType::AnyTagged(),
MachineType::AnyTagged()};
LinkageLocation kLocationSignature[] = {LinkageLocation::ForRegister(0),
LinkageLocation::ForRegister(1)};
const CallDescriptor* kCallDescriptor = new (zone()) CallDescriptor(
CallDescriptor::kCallCodeObject, MachineType::AnyTagged(),
LinkageLocation::ForRegister(0),
new (zone()) MachineSignature(1, 1, kMachineSignature),
new (zone()) LocationSignature(1, 1, kLocationSignature), 0,
Operator::kNoProperties, 0, 0, CallDescriptor::kNoFlags);
Node* p0 = Parameter(0);
Node* p1 = Parameter(1);
Node* call = graph()->NewNode(common()->Call(kCallDescriptor), p0, p1,
graph()->start(), graph()->start());
Node* if_success = graph()->NewNode(common()->IfSuccess(), call);
Node* ret = graph()->NewNode(common()->Return(), call, call, if_success);
Reduction r = Reduce(ret);
ASSERT_FALSE(r.Changed());
}
TEST_F(TailCallOptimizationTest, CallCodeObject1) {
MachineType kMachineSignature[] = {MachineType::AnyTagged(),
MachineType::AnyTagged()};
LinkageLocation kLocationSignature[] = {LinkageLocation::ForRegister(0),
LinkageLocation::ForRegister(1)};
const CallDescriptor* kCallDescriptor = new (zone()) CallDescriptor(
CallDescriptor::kCallCodeObject, MachineType::AnyTagged(),
LinkageLocation::ForRegister(0),
new (zone()) MachineSignature(1, 1, kMachineSignature),
new (zone()) LocationSignature(1, 1, kLocationSignature), 0,
Operator::kNoProperties, 0, 0, CallDescriptor::kSupportsTailCalls);
Node* p0 = Parameter(0);
Node* p1 = Parameter(1);
Node* call = graph()->NewNode(common()->Call(kCallDescriptor), p0, p1,
graph()->start(), graph()->start());
Node* if_success = graph()->NewNode(common()->IfSuccess(), call);
Node* if_exception = graph()->NewNode(
common()->IfException(IfExceptionHint::kLocallyUncaught), call, call);
Node* ret = graph()->NewNode(common()->Return(), call, call, if_success);
Node* end = graph()->NewNode(common()->End(1), if_exception);
graph()->SetEnd(end);
Reduction r = Reduce(ret);
ASSERT_FALSE(r.Changed());
}
TEST_F(TailCallOptimizationTest, CallCodeObject2) {
MachineType kMachineSignature[] = {MachineType::AnyTagged(),
MachineType::AnyTagged()};
LinkageLocation kLocationSignature[] = {LinkageLocation::ForRegister(0),
LinkageLocation::ForRegister(1)};
const CallDescriptor* kCallDescriptor = new (zone()) CallDescriptor(
CallDescriptor::kCallCodeObject, MachineType::AnyTagged(),
LinkageLocation::ForRegister(0),
new (zone()) MachineSignature(1, 1, kMachineSignature),
new (zone()) LocationSignature(1, 1, kLocationSignature), 0,
Operator::kNoProperties, 0, 0, CallDescriptor::kSupportsTailCalls);
Node* p0 = Parameter(0);
Node* p1 = Parameter(1);
Node* call = graph()->NewNode(common()->Call(kCallDescriptor), p0, p1,
graph()->start(), graph()->start());
Node* if_success = graph()->NewNode(common()->IfSuccess(), call);
Node* ret = graph()->NewNode(common()->Return(), call, call, if_success);
Reduction r = Reduce(ret);
ASSERT_TRUE(r.Changed());
EXPECT_THAT(r.replacement(), IsTailCall(kCallDescriptor, p0, p1,
graph()->start(), graph()->start()));
}
TEST_F(TailCallOptimizationTest, CallJSFunction0) {
MachineType kMachineSignature[] = {MachineType::AnyTagged(),
MachineType::AnyTagged()};
LinkageLocation kLocationSignature[] = {LinkageLocation::ForRegister(0),
LinkageLocation::ForRegister(1)};
const CallDescriptor* kCallDescriptor = new (zone()) CallDescriptor(
CallDescriptor::kCallJSFunction, MachineType::AnyTagged(),
LinkageLocation::ForRegister(0),
new (zone()) MachineSignature(1, 1, kMachineSignature),
new (zone()) LocationSignature(1, 1, kLocationSignature), 0,
Operator::kNoProperties, 0, 0, CallDescriptor::kNoFlags);
Node* p0 = Parameter(0);
Node* p1 = Parameter(1);
Node* call = graph()->NewNode(common()->Call(kCallDescriptor), p0, p1,
graph()->start(), graph()->start());
Node* if_success = graph()->NewNode(common()->IfSuccess(), call);
Node* ret = graph()->NewNode(common()->Return(), call, call, if_success);
Reduction r = Reduce(ret);
ASSERT_FALSE(r.Changed());
}
TEST_F(TailCallOptimizationTest, CallJSFunction1) {
MachineType kMachineSignature[] = {MachineType::AnyTagged(),
MachineType::AnyTagged()};
LinkageLocation kLocationSignature[] = {LinkageLocation::ForRegister(0),
LinkageLocation::ForRegister(1)};
const CallDescriptor* kCallDescriptor = new (zone()) CallDescriptor(
CallDescriptor::kCallJSFunction, MachineType::AnyTagged(),
LinkageLocation::ForRegister(0),
new (zone()) MachineSignature(1, 1, kMachineSignature),
new (zone()) LocationSignature(1, 1, kLocationSignature), 0,
Operator::kNoProperties, 0, 0, CallDescriptor::kSupportsTailCalls);
Node* p0 = Parameter(0);
Node* p1 = Parameter(1);
Node* call = graph()->NewNode(common()->Call(kCallDescriptor), p0, p1,
graph()->start(), graph()->start());
Node* if_success = graph()->NewNode(common()->IfSuccess(), call);
Node* if_exception = graph()->NewNode(
common()->IfException(IfExceptionHint::kLocallyUncaught), call, call);
Node* ret = graph()->NewNode(common()->Return(), call, call, if_success);
Node* end = graph()->NewNode(common()->End(1), if_exception);
graph()->SetEnd(end);
Reduction r = Reduce(ret);
ASSERT_FALSE(r.Changed());
}
TEST_F(TailCallOptimizationTest, CallJSFunction2) {
MachineType kMachineSignature[] = {MachineType::AnyTagged(),
MachineType::AnyTagged()};
LinkageLocation kLocationSignature[] = {LinkageLocation::ForRegister(0),
LinkageLocation::ForRegister(1)};
const CallDescriptor* kCallDescriptor = new (zone()) CallDescriptor(
CallDescriptor::kCallJSFunction, MachineType::AnyTagged(),
LinkageLocation::ForRegister(0),
new (zone()) MachineSignature(1, 1, kMachineSignature),
new (zone()) LocationSignature(1, 1, kLocationSignature), 0,
Operator::kNoProperties, 0, 0, CallDescriptor::kSupportsTailCalls);
Node* p0 = Parameter(0);
Node* p1 = Parameter(1);
Node* call = graph()->NewNode(common()->Call(kCallDescriptor), p0, p1,
graph()->start(), graph()->start());
Node* if_success = graph()->NewNode(common()->IfSuccess(), call);
Node* ret = graph()->NewNode(common()->Return(), call, call, if_success);
Reduction r = Reduce(ret);
ASSERT_TRUE(r.Changed());
EXPECT_THAT(r.replacement(), IsTailCall(kCallDescriptor, p0, p1,
graph()->start(), graph()->start()));
}
} // namespace compiler
} // namespace internal
} // namespace v8
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