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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef RCC_BACKEND_LIVE_TEST_SUPPORT_H
#define RCC_BACKEND_LIVE_TEST_SUPPORT_H
#include "Target/TestTarget.h"
#include "rcc/CodeGen/GenericOpcodes.h"
#include "rcc/CodeGen/MachineBasicBlock.h"
#include "rcc/CodeGen/MachineCFGUpdater.h"
#include "rcc/CodeGen/MachineFunction.h"
#include "rcc/CodeGen/MachineIRBuilder.h"
#include "rcc/CodeGen/MachineInstr.h"
#include "rcc/CodeGen/MachineOperand.h"
#include "rcc/CodeGen/MachineRegisterInfo.h"
#include "rcc/CodeGen/MachineVerifier.h"
#include "rcc/CodeGen/TargetDescription.h"
#include <algorithm>
#include <array>
#include <cstddef>
#include <cstdint>
#include <iostream>
#include <memory>
#include <span>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
namespace rcc::test::liveness {
constexpr std::uint32_t DefOpcode = 2048;
constexpr std::uint32_t UseOpcode = 2049;
constexpr std::uint32_t EarlyDefOpcode = 2050;
constexpr std::uint32_t MaskOpcode = 2051;
constexpr std::uint32_t MaskedDefOpcode = 2052;
constexpr std::uint32_t LiveOutMaskOpcode = 2053;
class TestContext final {
public:
void expect(bool Condition, std::string_view Message) {
if (Condition)
return;
std::cerr << Message << '\n';
++Failures;
}
[[nodiscard]] int result() const noexcept {
return Failures == 0 ? 0 : 1;
}
private:
int Failures = 0;
};
[[nodiscard]] rcc::Opcode testOpcode(std::uint32_t Value) {
return rcc::Opcode::fromValue(Value);
}
[[nodiscard]] rcc::OperandDescriptor registerOperand(rcc::RegisterOperandRole Role,
bool EarlyClobber = false) {
rcc::OperandDescriptor Result;
Result.Kinds = {rcc::MachineOperand::Kind::Register};
Result.RegisterRole = Role;
Result.EarlyClobber = EarlyClobber;
Result.AllowSubReg = true;
return Result;
}
[[nodiscard]] rcc::OperandDescriptor plainOperand(rcc::MachineOperand::Kind Kind) {
rcc::OperandDescriptor Result;
Result.Kinds = {Kind};
return Result;
}
[[nodiscard]] rcc::InstructionDescriptor instruction(std::uint32_t Value, std::string Name) {
rcc::InstructionDescriptor Result;
Result.InstructionOpcode = testOpcode(Value);
Result.Name = std::move(Name);
Result.Flags = {rcc::InstructionFlag::ProducesCode};
return Result;
}
[[nodiscard]] rcc::Expected<rcc::TargetDescription> createTarget() {
std::vector<rcc::InstructionDescriptor> Descriptors;
std::vector<rcc::ImmediatePredicate> Predicates;
auto Generic = rcc::appendGenericInstructionInfo(Descriptors, Predicates);
if (!Generic)
return std::unexpected(Generic.error());
auto Def = instruction(DefOpcode, "LIVENESS_DEF");
Def.Operands = {registerOperand(rcc::RegisterOperandRole::Def)};
Def.NumExplicitDefs = 1;
Descriptors.push_back(std::move(Def));
auto Use = instruction(UseOpcode, "LIVENESS_USE");
Use.Operands = {registerOperand(rcc::RegisterOperandRole::Use)};
Descriptors.push_back(std::move(Use));
auto EarlyDef = instruction(EarlyDefOpcode, "LIVENESS_EARLY_DEF");
EarlyDef.Operands = {registerOperand(rcc::RegisterOperandRole::Def, true)};
EarlyDef.NumExplicitDefs = 1;
Descriptors.push_back(std::move(EarlyDef));
auto Mask = instruction(MaskOpcode, "LIVENESS_MASK");
Mask.Operands = {plainOperand(rcc::MachineOperand::Kind::RegisterMask)};
Mask.Flags.set(rcc::InstructionFlag::Call);
Mask.Flags.set(rcc::InstructionFlag::HasSideEffects);
Descriptors.push_back(std::move(Mask));
auto MaskedDef = instruction(MaskedDefOpcode, "LIVENESS_MASKED_DEF");
MaskedDef.Operands = {registerOperand(rcc::RegisterOperandRole::Def),
plainOperand(rcc::MachineOperand::Kind::RegisterMask)};
MaskedDef.NumExplicitDefs = 1;
MaskedDef.Flags.set(rcc::InstructionFlag::Call);
MaskedDef.Flags.set(rcc::InstructionFlag::HasSideEffects);
Descriptors.push_back(std::move(MaskedDef));
auto LiveOutMask = instruction(LiveOutMaskOpcode, "LIVENESS_LIVEOUT_MASK");
LiveOutMask.Operands = {plainOperand(rcc::MachineOperand::Kind::LiveOutRegisterMask)};
Descriptors.push_back(std::move(LiveOutMask));
auto Instructions = rcc::InstructionSet::create(std::move(Descriptors), std::move(Predicates));
if (!Instructions)
return std::unexpected(Instructions.error());
return rcc::test::createTestTargetDescription(std::move(*Instructions));
}
struct FunctionFixture final {
std::unique_ptr<rcc::MachineFunction> Function;
std::vector<rcc::MachineBasicBlock *> Blocks;
};
[[nodiscard]] rcc::Expected<FunctionFixture> createFunction(std::string Name, std::uint64_t ID,
std::size_t BlockCount) {
auto Function =
rcc::MachineFunction::create(std::move(Name), rcc::MachineFunctionStableID::fromValue(ID));
if (!Function)
return std::unexpected(Function.error());
FunctionFixture Result{std::move(*Function), {}};
Result.Blocks.reserve(BlockCount);
for (std::size_t Index = 0; Index < BlockCount; ++Index) {
auto Block = Result.Function->createBasicBlock();
if (!Block)
return std::unexpected(Block.error());
auto Appended = Result.Function->appendBlock(**Block);
if (!Appended)
return std::unexpected(Appended.error());
Result.Blocks.push_back(*Block);
}
return Result;
}
[[nodiscard]] rcc::Expected<rcc::Register> createVReg(rcc::MachineFunction &Function) {
auto Type = rcc::LLT::makeInteger(64);
if (!Type)
return std::unexpected(Type.error());
auto Reg = Function.registerInfo().createVirtualRegister(*Type);
if (!Reg)
return std::unexpected(Reg.error());
auto Bank = Function.registerInfo().setRegisterBank(*Reg, rcc::test::TestRegisterBank::GPR);
if (!Bank)
return std::unexpected(Bank.error());
auto Class = Function.registerInfo().setRegisterClass(*Reg, rcc::test::TestRegisterClass::GPR64);
if (!Class)
return std::unexpected(Class.error());
return *Reg;
}
[[nodiscard]] rcc::Expected<rcc::MachineInstr *>
buildDef(rcc::MachineFunction &Function, const rcc::TargetDescription &Target,
rcc::MachineBasicBlock &Block, rcc::Register Reg, rcc::SubRegIndex SubReg = {},
bool EarlyClobber = false) {
rcc::MachineIRBuilder Builder(Function, Target);
auto Point = Builder.setInsertPoint(Block);
if (!Point)
return std::unexpected(Point.error());
auto Pending = Builder.buildInstr(testOpcode(EarlyClobber ? EarlyDefOpcode : DefOpcode));
if (!Pending)
return std::unexpected(Pending.error());
rcc::RegisterOperandFlags Flags;
if (EarlyClobber)
Flags.set(rcc::RegisterOperandFlag::EarlyClobber);
auto Added = Pending->addDef(Reg, Flags, SubReg);
if (!Added)
return std::unexpected(Added.error());
return Pending->build();
}
[[nodiscard]] rcc::Expected<rcc::MachineInstr *>
buildUse(rcc::MachineFunction &Function, const rcc::TargetDescription &Target,
rcc::MachineBasicBlock &Block, rcc::Register Reg, rcc::SubRegIndex SubReg = {},
rcc::MachineInstr *Before = nullptr) {
rcc::MachineIRBuilder Builder(Function, Target);
auto Point =
Before == nullptr ? Builder.setInsertPoint(Block) : Builder.setInsertPointBefore(*Before);
if (!Point)
return std::unexpected(Point.error());
auto Pending = Builder.buildInstr(testOpcode(UseOpcode));
if (!Pending)
return std::unexpected(Pending.error());
auto Added = Pending->addUse(Reg, {}, SubReg);
if (!Added)
return std::unexpected(Added.error());
return Pending->build();
}
[[nodiscard]] rcc::Expected<rcc::MachineInstr *>
buildMask(rcc::MachineFunction &Function, const rcc::TargetDescription &Target,
rcc::MachineBasicBlock &Block, std::shared_ptr<const rcc::RegisterMask> Mask) {
rcc::MachineIRBuilder Builder(Function, Target);
auto Point = Builder.setInsertPoint(Block);
if (!Point)
return std::unexpected(Point.error());
auto Pending = Builder.buildInstr(testOpcode(MaskOpcode));
if (!Pending)
return std::unexpected(Pending.error());
auto Added = Pending->addRegisterMask(std::move(Mask));
if (!Added)
return std::unexpected(Added.error());
return Pending->build();
}
[[nodiscard]] rcc::Expected<rcc::MachineInstr *>
buildMaskedDef(rcc::MachineFunction &Function, const rcc::TargetDescription &Target,
rcc::MachineBasicBlock &Block, rcc::Register Reg,
std::shared_ptr<const rcc::RegisterMask> Mask) {
rcc::MachineIRBuilder Builder(Function, Target);
auto Point = Builder.setInsertPoint(Block);
if (!Point)
return std::unexpected(Point.error());
auto Pending = Builder.buildInstr(testOpcode(MaskedDefOpcode));
if (!Pending)
return std::unexpected(Pending.error());
auto Def = Pending->addDef(Reg);
if (!Def)
return std::unexpected(Def.error());
auto MaskResult = Pending->addRegisterMask(std::move(Mask));
if (!MaskResult)
return std::unexpected(MaskResult.error());
return Pending->build();
}
[[nodiscard]] rcc::PhysicalRegister physical(std::uint32_t Number) {
return *rcc::PhysicalRegister::create(Number);
}
[[nodiscard]] bool hasFlag(const rcc::MachineInstr &Instruction, std::size_t OperandIndex,
rcc::RegisterOperandFlag Flag) {
const rcc::MachineOperand *Operand = Instruction.operandAt(OperandIndex);
return Operand != nullptr && Operand->registerFlags().has(Flag);
}
inline void setRebuildProperties(rcc::MachineFunction &Function) {
Function.properties().set(rcc::MachineFunctionProperty::Legalized);
Function.properties().set(rcc::MachineFunctionProperty::RegBankSelected);
Function.properties().set(rcc::MachineFunctionProperty::Selected);
Function.properties().set(rcc::MachineFunctionProperty::NoPHIs);
Function.properties().set(rcc::MachineFunctionProperty::TiedOpsRewritten);
}
} // namespace rcc::test::liveness
#endif // RCC_BACKEND_LIVE_TEST_SUPPORT_H
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