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// SPDX-License-Identifier: GPL-3.0-or-later
#include "rcc/CodeGen/GlobalISel/RegBankSelect.h"
#include "GISel/RISCVRegisterBankInfo.h"
#include "GISelMITest.h"
#include "rcc/Target/RISCV/RISCVSubtarget.h"
#include "rcc/Target/RISCV/RISCVTarget.h"
#include <cstdint>
namespace {
using rcc::test::buildConstant;
using rcc::test::createFixture;
using rcc::test::createRegister;
using rcc::test::TestContext;
void testBankConflict(TestContext &Context) {
auto Target = rcc::riscv::createTargetDescription();
auto Fixture = createFixture(Context, "pipeline_bank_conflict", 4);
Context.expect(Target.has_value() && Fixture.Function != nullptr && Fixture.Entry != nullptr,
"bank conflict fixture must be complete");
if (!Target || !Fixture.Function || Fixture.Entry == nullptr)
return;
const rcc::Register Value = createRegister(Context, *Fixture.Function, 64);
Context.expect(
Fixture.Function->registerInfo()
.setRegisterBank(Value, rcc::RegisterBankID::fromValue(
static_cast<std::uint32_t>(rcc::riscv::RegisterBank::FPR)))
.has_value(),
"conflicting bank assignment must be constructible");
Fixture.Function->properties() = {rcc::MachineFunctionProperty::Legalized};
const rcc::riscv::RISCVSubtarget Subtarget(rcc::riscv::RISCVSubtargetFeatures::rv64gc());
rcc::RegBankSelect Pass(Subtarget.getRegBankInfo());
rcc::MachineAnalysisManager Analyses;
auto Result = Pass.run(*Fixture.Function, *Target, Analyses);
Context.expect(!Result && Result.error().code() == rcc::ErrorCode::VerificationError,
"bank selection must reject a conflicting pre-existing bank");
auto Info = Fixture.Function->registerInfo().virtualRegisterInfo(Value);
Context.expect(Info && Info->get().Bank, "failed bank selection must preserve a bank assignment");
if (!Info || !Info->get().Bank)
return;
const rcc::RegisterBankID Bank = Info->get().Bank.value_or(rcc::RegisterBankID{});
Context.expect(Bank == rcc::RegisterBankID::fromValue(
static_cast<std::uint32_t>(rcc::riscv::RegisterBank::FPR)),
"failed bank selection must preserve the original bank assignment");
}
void testBankClassOnlyChange(TestContext &Context) {
auto Target = rcc::riscv::createTargetDescription();
auto Fixture = createFixture(Context, "pipeline_bank_class", 5);
Context.expect(Target.has_value() && Fixture.Function != nullptr && Fixture.Entry != nullptr,
"bank class fixture must be complete");
if (!Target || !Fixture.Function || Fixture.Entry == nullptr)
return;
const rcc::Register Value = createRegister(Context, *Fixture.Function, 64);
rcc::MachineIRBuilder Builder(*Fixture.Function, *Target);
if (Value.isNoRegister() || !Builder.setInsertPoint(*Fixture.Entry) ||
!buildConstant(Context, Builder, Value, 7))
return;
const auto GPR =
rcc::RegisterBankID::fromValue(static_cast<std::uint32_t>(rcc::riscv::RegisterBank::GPR));
Context.expect(Fixture.Function->registerInfo().setRegisterBank(Value, GPR).has_value(),
"pre-existing GPR bank must be assignable");
Fixture.Function->properties() = {rcc::MachineFunctionProperty::Legalized};
const rcc::riscv::RISCVSubtarget Subtarget(rcc::riscv::RISCVSubtargetFeatures::rv64gc());
rcc::RegBankSelect Pass(Subtarget.getRegBankInfo());
rcc::MachineAnalysisManager Analyses;
auto Result = Pass.run(*Fixture.Function, *Target, Analyses);
Context.expect(Result.has_value() && Result->Changed &&
Result->Changes.has(rcc::MachinePassChange::Registers),
"bank selection must report a class-only register change");
auto Info = Fixture.Function->registerInfo().virtualRegisterInfo(Value);
Context.expect(Info && Info->get().Bank && Info->get().RegClass,
"bank selection must publish both bank and class");
if (!Info || !Info->get().RegClass)
return;
Context.expect(Info->get().RegClass.value_or(rcc::RegisterClassID{}) ==
rcc::RegisterClassID::fromValue(
static_cast<std::uint32_t>(rcc::riscv::RegisterClass::GPR)),
"i64 GPR bank must select the GPR class");
}
} // namespace
int main() {
TestContext Context;
testBankConflict(Context);
testBankClassOnlyChange(Context);
return Context.result();
}
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