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// 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 "src/interpreter/bytecode-register-allocator.h"
#include "test/unittests/test-utils.h"
namespace v8 {
namespace internal {
namespace interpreter {
class BytecodeRegisterAllocatorTest : public TestWithIsolateAndZone {
public:
BytecodeRegisterAllocatorTest() {}
~BytecodeRegisterAllocatorTest() override {}
};
TEST_F(BytecodeRegisterAllocatorTest, TemporariesRecycled) {
BytecodeArrayBuilder builder(isolate(), zone());
builder.set_parameter_count(0);
builder.set_locals_count(0);
builder.set_context_count(0);
int first;
{
BytecodeRegisterAllocator temporaries(&builder);
first = temporaries.NewRegister().index();
temporaries.NewRegister();
temporaries.NewRegister();
temporaries.NewRegister();
}
int second;
{
BytecodeRegisterAllocator temporaries(&builder);
second = temporaries.NewRegister().index();
}
CHECK_EQ(first, second);
}
TEST_F(BytecodeRegisterAllocatorTest, ConsecutiveRegisters) {
BytecodeArrayBuilder builder(isolate(), zone());
builder.set_parameter_count(0);
builder.set_locals_count(0);
builder.set_context_count(0);
BytecodeRegisterAllocator temporaries(&builder);
temporaries.PrepareForConsecutiveAllocations(4);
Register reg0 = temporaries.NextConsecutiveRegister();
Register other = temporaries.NewRegister();
Register reg1 = temporaries.NextConsecutiveRegister();
Register reg2 = temporaries.NextConsecutiveRegister();
Register reg3 = temporaries.NextConsecutiveRegister();
USE(other);
CHECK(Register::AreContiguous(reg0, reg1, reg2, reg3));
}
} // namespace interpreter
} // namespace internal
} // namespace v8
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