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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include <cstdint>
#include <functional>
#include <memory>
#include <string>
#include "CartesianBenchmarks.h"
#include "benchmark/benchmark.h"
#include "test_macros.h"
namespace {
enum class FunctionType {
Null,
FunctionPointer,
MemberFunctionPointer,
MemberPointer,
SmallTrivialFunctor,
SmallNonTrivialFunctor,
LargeTrivialFunctor,
LargeNonTrivialFunctor
};
struct AllFunctionTypes : EnumValuesAsTuple<AllFunctionTypes, FunctionType, 8> {
static constexpr const char* Names[] = {"Null",
"FuncPtr",
"MemFuncPtr",
"MemPtr",
"SmallTrivialFunctor",
"SmallNonTrivialFunctor",
"LargeTrivialFunctor",
"LargeNonTrivialFunctor"};
};
enum class Opacity { kOpaque, kTransparent };
struct AllOpacity : EnumValuesAsTuple<AllOpacity, Opacity, 2> {
static constexpr const char* Names[] = {"Opaque", "Transparent"};
};
struct S {
int function() const { return 0; }
int field = 0;
};
int FunctionWithS(const S*) { return 0; }
struct SmallTrivialFunctor {
int operator()(const S*) const { return 0; }
};
struct SmallNonTrivialFunctor {
SmallNonTrivialFunctor() {}
SmallNonTrivialFunctor(const SmallNonTrivialFunctor&) {}
~SmallNonTrivialFunctor() {}
int operator()(const S*) const { return 0; }
};
struct LargeTrivialFunctor {
LargeTrivialFunctor() {
// Do not spend time initializing the padding.
}
int padding[16];
int operator()(const S*) const { return 0; }
};
struct LargeNonTrivialFunctor {
int padding[16];
LargeNonTrivialFunctor() {
// Do not spend time initializing the padding.
}
LargeNonTrivialFunctor(const LargeNonTrivialFunctor&) {}
~LargeNonTrivialFunctor() {}
int operator()(const S*) const { return 0; }
};
using Function = std::function<int(const S*)>;
TEST_ALWAYS_INLINE
inline Function MakeFunction(FunctionType type, bool opaque = false) {
switch (type) {
case FunctionType::Null:
return nullptr;
case FunctionType::FunctionPointer:
return maybeOpaque(FunctionWithS, opaque);
case FunctionType::MemberFunctionPointer:
return maybeOpaque(&S::function, opaque);
case FunctionType::MemberPointer:
return maybeOpaque(&S::field, opaque);
case FunctionType::SmallTrivialFunctor:
return maybeOpaque(SmallTrivialFunctor{}, opaque);
case FunctionType::SmallNonTrivialFunctor:
return maybeOpaque(SmallNonTrivialFunctor{}, opaque);
case FunctionType::LargeTrivialFunctor:
return maybeOpaque(LargeTrivialFunctor{}, opaque);
case FunctionType::LargeNonTrivialFunctor:
return maybeOpaque(LargeNonTrivialFunctor{}, opaque);
}
}
template <class Opacity, class FunctionType>
struct ConstructAndDestroy {
static void run(benchmark::State& state) {
for (auto _ : state) {
if (Opacity() == ::Opacity::kOpaque) {
benchmark::DoNotOptimize(MakeFunction(FunctionType(), true));
} else {
MakeFunction(FunctionType());
}
}
}
static std::string name() {
return "BM_ConstructAndDestroy" + FunctionType::name() + Opacity::name();
}
};
template <class FunctionType>
struct Copy {
static void run(benchmark::State& state) {
auto value = MakeFunction(FunctionType());
for (auto _ : state) {
benchmark::DoNotOptimize(value);
auto copy = value; // NOLINT
benchmark::DoNotOptimize(copy);
}
}
static std::string name() { return "BM_Copy" + FunctionType::name(); }
};
template <class FunctionType>
struct Move {
static void run(benchmark::State& state) {
Function values[2] = {MakeFunction(FunctionType())};
int i = 0;
for (auto _ : state) {
benchmark::DoNotOptimize(values);
benchmark::DoNotOptimize(values[i ^ 1] = std::move(values[i]));
i ^= 1;
}
}
static std::string name() {
return "BM_Move" + FunctionType::name();
}
};
template <class Function1, class Function2>
struct Swap {
static void run(benchmark::State& state) {
Function values[2] = {MakeFunction(Function1()), MakeFunction(Function2())};
for (auto _ : state) {
benchmark::DoNotOptimize(values);
values[0].swap(values[1]);
}
}
static bool skip() { return Function1() > Function2(); }
static std::string name() {
return "BM_Swap" + Function1::name() + Function2::name();
}
};
template <class FunctionType>
struct OperatorBool {
static void run(benchmark::State& state) {
auto f = MakeFunction(FunctionType());
for (auto _ : state) {
benchmark::DoNotOptimize(f);
benchmark::DoNotOptimize(static_cast<bool>(f));
}
}
static std::string name() { return "BM_OperatorBool" + FunctionType::name(); }
};
template <class FunctionType>
struct Invoke {
static void run(benchmark::State& state) {
S s;
const auto value = MakeFunction(FunctionType());
for (auto _ : state) {
benchmark::DoNotOptimize(value);
benchmark::DoNotOptimize(value(&s));
}
}
static bool skip() { return FunctionType() == ::FunctionType::Null; }
static std::string name() { return "BM_Invoke" + FunctionType::name(); }
};
template <class FunctionType>
struct InvokeInlined {
static void run(benchmark::State& state) {
S s;
for (auto _ : state) {
MakeFunction(FunctionType())(&s);
}
}
static bool skip() { return FunctionType() == ::FunctionType::Null; }
static std::string name() {
return "BM_InvokeInlined" + FunctionType::name();
}
};
} // namespace
int main(int argc, char** argv) {
benchmark::Initialize(&argc, argv);
if (benchmark::ReportUnrecognizedArguments(argc, argv))
return 1;
makeCartesianProductBenchmark<ConstructAndDestroy, AllOpacity,
AllFunctionTypes>();
makeCartesianProductBenchmark<Copy, AllFunctionTypes>();
makeCartesianProductBenchmark<Move, AllFunctionTypes>();
makeCartesianProductBenchmark<Swap, AllFunctionTypes, AllFunctionTypes>();
makeCartesianProductBenchmark<OperatorBool, AllFunctionTypes>();
makeCartesianProductBenchmark<Invoke, AllFunctionTypes>();
makeCartesianProductBenchmark<InvokeInlined, AllFunctionTypes>();
benchmark::RunSpecifiedBenchmarks();
}