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// SPDX-License-Identifier: GPL-3.0-or-later
#include "rcc/CodeGen/MachineCompilationStatus.h"
#include "rcc/CodeGen/MachineFunctionCloner.h"
#include <array>
#include <cstddef>
#include <optional>
#include <string>
#include <string_view>
#include <utility>
namespace rcc {
namespace {
constexpr std::array StateNames{
std::string_view{"Success"},
std::string_view{"Unsupported"},
std::string_view{"MIRParseFailed"},
std::string_view{"LegalizationFailed"},
std::string_view{"SelectionFailed"},
std::string_view{"RegisterAllocationFailed"},
std::string_view{"CallLoweringFailed"},
std::string_view{"FrameLayoutFailed"},
std::string_view{"FinalizationFailed"},
std::string_view{"AssemblyLoweringFailed"},
std::string_view{"InternalError"},
std::string_view{"SchedulingFailed"},
};
static_assert(StateNames.size() == static_cast<std::size_t>(MachineCompilationState::Count));
[[nodiscard]] bool
isKnownDiagnosticSeverity(MachineCompilationDiagnosticSeverity Severity) noexcept {
return static_cast<std::size_t>(Severity) <
static_cast<std::size_t>(MachineCompilationDiagnosticSeverity::Count);
}
[[nodiscard]] bool isKnownErrorCode(ErrorCode Code) noexcept {
switch (Code) {
case ErrorCode::InvalidArgument:
case ErrorCode::ParseError:
case ErrorCode::VerificationError:
case ErrorCode::Unsupported:
case ErrorCode::RegisterAllocationFailed:
case ErrorCode::FrameLayoutFailed:
case ErrorCode::SchedulingFailed:
case ErrorCode::BranchRelaxationFailed:
case ErrorCode::PseudoExpansionFailed:
case ErrorCode::FinalEncodabilityFailed:
case ErrorCode::CFGOptimizationFailed:
case ErrorCode::AssemblyLoweringFailed:
case ErrorCode::InstructionEncodingFailed:
case ErrorCode::FixupApplicationFailed:
case ErrorCode::RelocationFailed:
case ErrorCode::ObjectWritingFailed:
case ErrorCode::InvalidInvocation:
case ErrorCode::ManifestError:
case ErrorCode::CacheMiss:
case ErrorCode::ReproducerError:
case ErrorCode::ReductionFailed:
case ErrorCode::FuzzingFailure:
case ErrorCode::IoError:
case ErrorCode::InternalError:
return true;
}
return false;
}
[[nodiscard]] bool isKnownPipelineStage(PipelineStage Stage) noexcept {
switch (Stage) {
case PipelineStage::MachineIRInput:
case PipelineStage::Legalized:
case PipelineStage::RegBankSelected:
case PipelineStage::Selected:
case PipelineStage::SSAEliminated:
case PipelineStage::TiedOpsRewritten:
case PipelineStage::RegisterAllocated:
case PipelineStage::FrameFinalized:
case PipelineStage::PostRAFinalized:
case PipelineStage::Emission:
return true;
}
return false;
}
[[nodiscard]] Expected<void> verifyOptionalText(const std::optional<std::string> &Text,
std::string_view FieldName) {
if (Text && Text->empty()) {
return makeUnexpected(ErrorCode::VerificationError, "machine compilation failure " +
std::string(FieldName) +
" cannot be empty");
}
return {};
}
} // namespace
bool isKnownMachineCompilationState(MachineCompilationState State) noexcept {
return static_cast<std::size_t>(State) < StateNames.size();
}
std::string_view getMachineCompilationStateName(MachineCompilationState State) noexcept {
const auto Index = static_cast<std::size_t>(State);
if (Index >= StateNames.size())
return "Unknown";
return StateNames[Index];
}
Expected<void> MachineCompilationStatus::fail(MachineCompilationState NewState,
MachineCompilationFailure NewFailure) {
if (!succeeded()) {
return makeUnexpected(ErrorCode::InvalidArgument,
"machine compilation status already contains a failure");
}
if (!isKnownMachineCompilationState(NewState) || NewState == MachineCompilationState::Success) {
return makeUnexpected(ErrorCode::InvalidArgument,
"machine compilation failure requires a known failure state");
}
MachineCompilationStatus Candidate;
Candidate.State = NewState;
Candidate.Failure = std::move(NewFailure);
auto Verification = Candidate.verify();
if (!Verification)
return std::unexpected(Verification.error());
*this = std::move(Candidate);
return {};
}
Expected<void> MachineCompilationStatus::verify() const {
if (!isKnownMachineCompilationState(State)) {
return makeUnexpected(ErrorCode::VerificationError,
"machine compilation status has an unknown state");
}
if (State == MachineCompilationState::Success) {
if (Failure) {
return makeUnexpected(ErrorCode::VerificationError,
"successful machine compilation status contains failure details");
}
return {};
}
if (!Failure) {
return makeUnexpected(ErrorCode::VerificationError,
"failed machine compilation status lacks failure details");
}
if (!isKnownDiagnosticSeverity(Failure->Diagnostic.Severity)) {
return makeUnexpected(ErrorCode::VerificationError,
"machine compilation diagnostic has an unknown severity");
}
if (!isKnownErrorCode(Failure->Diagnostic.Code)) {
return makeUnexpected(ErrorCode::VerificationError,
"machine compilation diagnostic has an unknown error code");
}
if (Failure->Diagnostic.Message.empty()) {
return makeUnexpected(ErrorCode::VerificationError,
"machine compilation diagnostic message cannot be empty");
}
if (Failure->Diagnostic.Location && !Failure->Diagnostic.Location->isValid()) {
return makeUnexpected(ErrorCode::VerificationError,
"machine compilation diagnostic has an invalid source location");
}
if (Failure->FailureInstruction && !Failure->FailureInstruction->isValid()) {
return makeUnexpected(ErrorCode::VerificationError,
"machine compilation failure has an invalid instruction StableID");
}
if (Failure->FailureStage && !isKnownPipelineStage(*Failure->FailureStage)) {
return makeUnexpected(ErrorCode::VerificationError,
"machine compilation failure has an unknown pipeline stage");
}
for (const auto &[Text, Name] :
{std::pair{&Failure->FailurePass, std::string_view{"pass"}},
std::pair{&Failure->FailureRule, std::string_view{"rule or pattern"}},
std::pair{&Failure->Target, std::string_view{"target"}},
std::pair{&Failure->Subtarget, std::string_view{"subtarget"}}}) {
auto TextVerification = verifyOptionalText(*Text, Name);
if (!TextVerification)
return TextVerification;
}
return {};
}
Expected<MachineCompilationStatus>
MachineCompilationStatus::clone(const MachineFunctionCloneContext &CloneContext) const {
auto Verification = verify();
if (!Verification)
return std::unexpected(Verification.error());
if (succeeded())
return MachineCompilationStatus{};
if (!Failure) {
return makeUnexpected(ErrorCode::InternalError,
"verified failed compilation status has no failure details");
}
MachineCompilationFailure ClonedFailure = *Failure;
if (ClonedFailure.FailureInstruction) {
auto Mapped = CloneContext.mapInstructionStableID(*ClonedFailure.FailureInstruction);
if (!Mapped)
return std::unexpected(Mapped.error());
ClonedFailure.FailureInstruction = *Mapped;
}
MachineCompilationStatus Result;
auto FailureResult = Result.fail(State, std::move(ClonedFailure));
if (!FailureResult)
return std::unexpected(FailureResult.error());
return Result;
}
} // namespace rcc
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