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//===- Diagnostics.cpp - MLIR Diagnostics ---------------------------------===//
//
// Copyright 2019 The MLIR Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// =============================================================================
#include "mlir/IR/Diagnostics.h"
#include "mlir/IR/Location.h"
#include "mlir/IR/Types.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/Mutex.h"
#include "llvm/Support/raw_ostream.h"
using namespace mlir;
using namespace mlir::detail;
//===----------------------------------------------------------------------===//
// DiagnosticArgument
//===----------------------------------------------------------------------===//
// Construct from a Type.
DiagnosticArgument::DiagnosticArgument(Type val)
: kind(DiagnosticArgumentKind::Type),
opaqueVal(reinterpret_cast<intptr_t>(val.getAsOpaquePointer())) {}
/// Returns this argument as a Type.
Type DiagnosticArgument::getAsType() const {
assert(getKind() == DiagnosticArgumentKind::Type);
return Type::getFromOpaquePointer(reinterpret_cast<const void *>(opaqueVal));
}
/// Outputs this argument to a stream.
void DiagnosticArgument::print(raw_ostream &os) const {
switch (kind) {
case DiagnosticArgumentKind::Integer:
os << getAsInteger();
break;
case DiagnosticArgumentKind::String:
os << getAsString();
break;
case DiagnosticArgumentKind::Type:
os << getAsType();
break;
case DiagnosticArgumentKind::Unsigned:
os << getAsUnsigned();
break;
}
}
//===----------------------------------------------------------------------===//
// Diagnostic
//===----------------------------------------------------------------------===//
/// Outputs this diagnostic to a stream.
void Diagnostic::print(raw_ostream &os) const {
for (auto &arg : getArguments())
arg.print(os);
}
/// Convert the diagnostic to a string.
std::string Diagnostic::str() const {
std::string str;
llvm::raw_string_ostream os(str);
print(os);
return os.str();
}
//===----------------------------------------------------------------------===//
// InFlightDiagnostic
//===----------------------------------------------------------------------===//
/// Allow an inflight diagnostic to be converted to 'failure', otherwise
/// 'success' if this is an empty diagnostic.
InFlightDiagnostic::operator LogicalResult() const {
return failure(isInFlight());
}
/// Reports the diagnostic to the engine.
void InFlightDiagnostic::report() {
if (isInFlight()) {
owner->emit(*impl);
impl.reset();
}
}
//===----------------------------------------------------------------------===//
// DiagnosticEngineImpl
//===----------------------------------------------------------------------===//
namespace mlir {
namespace detail {
struct DiagnosticEngineImpl {
/// Emit a diagnostic using the registered issue handle if present, or with
/// the default behavior if not.
void emit(Location loc, StringRef msg, DiagnosticSeverity severity);
/// A mutex to ensure that diagnostics emission is thread-safe.
llvm::sys::SmartMutex<true> mutex;
/// This is the handler to use to report diagnostics, or null if not
/// registered.
DiagnosticEngine::HandlerTy handler;
};
} // namespace detail
} // namespace mlir
/// Emit a diagnostic using the registered issue handle if present, or with
/// the default behavior if not.
void DiagnosticEngineImpl::emit(Location loc, StringRef msg,
DiagnosticSeverity severity) {
// Lock access to the handler.
llvm::sys::SmartScopedLock<true> lock(mutex);
// If we had a handler registered, emit the diagnostic using it.
if (handler) {
// TODO(b/131756158) FusedLoc should be handled by the diagnostic handler
// instead of here.
// Check to see if we are emitting a diagnostic on a fused location.
if (auto fusedLoc = loc.dyn_cast<FusedLoc>()) {
auto fusedLocs = fusedLoc->getLocations();
// Emit the original diagnostic with the first location in the fused list.
emit(fusedLocs.front(), msg, severity);
// Emit the rest of the locations as notes.
for (Location subLoc : fusedLocs.drop_front())
emit(subLoc, "fused from here", DiagnosticSeverity::Note);
return;
}
return handler(loc, msg, severity);
}
// Otherwise, if this is an error we emit it to stderr.
if (severity != DiagnosticSeverity::Error)
return;
auto &os = llvm::errs();
if (!loc.isa<UnknownLoc>())
os << loc << ": ";
os << "error: ";
// The default behavior for errors is to emit them to stderr.
os << msg << '\n';
os.flush();
}
//===----------------------------------------------------------------------===//
// DiagnosticEngine
//===----------------------------------------------------------------------===//
DiagnosticEngine::DiagnosticEngine() : impl(new DiagnosticEngineImpl()) {}
DiagnosticEngine::~DiagnosticEngine() {}
/// Set the diagnostic handler for this engine. The handler is passed
/// location information if present (nullptr if not) along with a message and
/// a severity that indicates whether this is an error, warning, etc. Note
/// that this replaces any existing handler.
void DiagnosticEngine::setHandler(const HandlerTy &handler) {
llvm::sys::SmartScopedLock<true> lock(impl->mutex);
impl->handler = handler;
}
/// Return the current diagnostic handler, or null if none is present.
auto DiagnosticEngine::getHandler() -> HandlerTy {
llvm::sys::SmartScopedLock<true> lock(impl->mutex);
return impl->handler;
}
/// Emit a diagnostic using the registered issue handler if present, or with
/// the default behavior if not.
void DiagnosticEngine::emit(const Diagnostic &diag) {
impl->emit(diag.getLocation(), diag.str(), diag.getSeverity());
}
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