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//===- MlirTranslateMain.cpp - MLIR Translation entry point ---------------===//
//
// 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 "mlir/Tools/mlir-translate/MlirTranslateMain.h"
#include "mlir/IR/AsmState.h"
#include "mlir/Parser/Parser.h"
#include "mlir/Support/FileUtilities.h"
#include "mlir/Support/Timing.h"
#include "mlir/Support/ToolUtilities.h"
#include "mlir/Tools/mlir-translate/Translation.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/ToolOutputFile.h"
using namespace mlir;
//===----------------------------------------------------------------------===//
// Diagnostic Filter
//===----------------------------------------------------------------------===//
namespace {
/// A scoped diagnostic handler that marks non-error diagnostics as handled. As
/// a result, the main diagnostic handler does not print non-error diagnostics.
class ErrorDiagnosticFilter : public ScopedDiagnosticHandler {
public:
ErrorDiagnosticFilter(MLIRContext *ctx) : ScopedDiagnosticHandler(ctx) {
setHandler([](Diagnostic &diag) {
if (diag.getSeverity() != DiagnosticSeverity::Error)
return success();
return failure();
});
}
};
} // namespace
//===----------------------------------------------------------------------===//
// Translate Entry Point
//===----------------------------------------------------------------------===//
LogicalResult mlir::mlirTranslateMain(int argc, char **argv,
llvm::StringRef toolName) {
static llvm::cl::opt<std::string> inputFilename(
llvm::cl::Positional, llvm::cl::desc("<input file>"),
llvm::cl::init("-"));
static llvm::cl::opt<std::string> outputFilename(
"o", llvm::cl::desc("Output filename"), llvm::cl::value_desc("filename"),
llvm::cl::init("-"));
static llvm::cl::opt<bool> allowUnregisteredDialects(
"allow-unregistered-dialect",
llvm::cl::desc("Allow operation with no registered dialects (discouraged: testing only!)"),
llvm::cl::init(false));
static llvm::cl::opt<std::string> inputSplitMarker{
"split-input-file", llvm::cl::ValueOptional,
llvm::cl::callback([&](const std::string &str) {
// Implicit value: use default marker if flag was used without value.
if (str.empty())
inputSplitMarker.setValue(kDefaultSplitMarker);
}),
llvm::cl::desc("Split the input file into chunks using the given or "
"default marker and process each chunk independently"),
llvm::cl::init("")};
static llvm::cl::opt<SourceMgrDiagnosticVerifierHandler::Level>
verifyDiagnostics{
"verify-diagnostics", llvm::cl::ValueOptional,
llvm::cl::desc("Check that emitted diagnostics match expected-* "
"lines on the corresponding line"),
llvm::cl::values(
clEnumValN(
SourceMgrDiagnosticVerifierHandler::Level::All, "all",
"Check all diagnostics (expected, unexpected, near-misses)"),
// Implicit value: when passed with no arguments, e.g.
// `--verify-diagnostics` or `--verify-diagnostics=`.
clEnumValN(
SourceMgrDiagnosticVerifierHandler::Level::All, "",
"Check all diagnostics (expected, unexpected, near-misses)"),
clEnumValN(
SourceMgrDiagnosticVerifierHandler::Level::OnlyExpected,
"only-expected", "Check only expected diagnostics"))};
static llvm::cl::opt<bool> errorDiagnosticsOnly(
"error-diagnostics-only",
llvm::cl::desc("Filter all non-error diagnostics "
"(discouraged: testing only!)"),
llvm::cl::init(false));
static llvm::cl::opt<std::string> outputSplitMarker(
"output-split-marker",
llvm::cl::desc("Split marker to use for merging the ouput"),
llvm::cl::init(""));
llvm::InitLLVM y(argc, argv);
// Add flags for all the registered translations.
llvm::cl::list<const Translation *, bool, TranslationParser>
translationsRequested("", llvm::cl::desc("Translations to perform"),
llvm::cl::Required);
registerAsmPrinterCLOptions();
registerMLIRContextCLOptions();
registerTranslationCLOptions();
registerDefaultTimingManagerCLOptions();
llvm::cl::ParseCommandLineOptions(argc, argv, toolName);
// Initialize the timing manager.
DefaultTimingManager tm;
applyDefaultTimingManagerCLOptions(tm);
TimingScope timing = tm.getRootScope();
std::string errorMessage;
std::unique_ptr<llvm::MemoryBuffer> input;
if (auto inputAlignment = translationsRequested[0]->getInputAlignment())
input = openInputFile(inputFilename, *inputAlignment, &errorMessage);
else
input = openInputFile(inputFilename, &errorMessage);
if (!input) {
llvm::errs() << errorMessage << "\n";
return failure();
}
auto output = openOutputFile(outputFilename, &errorMessage);
if (!output) {
llvm::errs() << errorMessage << "\n";
return failure();
}
// Processes the memory buffer with a new MLIRContext.
auto processBuffer = [&](std::unique_ptr<llvm::MemoryBuffer> ownedBuffer,
raw_ostream &os) {
// Many of the translations expect a null-terminated buffer while splitting
// the buffer does not guarantee null-termination. Make a copy of the buffer
// to ensure null-termination.
if (!ownedBuffer->getBuffer().ends_with('\0')) {
ownedBuffer = llvm::MemoryBuffer::getMemBufferCopy(
ownedBuffer->getBuffer(), ownedBuffer->getBufferIdentifier());
}
// Temporary buffers for chained translation processing.
std::string dataIn;
std::string dataOut;
LogicalResult result = LogicalResult::success();
for (size_t i = 0, e = translationsRequested.size(); i < e; ++i) {
llvm::raw_ostream *stream;
llvm::raw_string_ostream dataStream(dataOut);
if (i == e - 1) {
// Output last translation to output.
stream = &os;
} else {
// Output translation to temporary data buffer.
stream = &dataStream;
}
const Translation *translationRequested = translationsRequested[i];
TimingScope translationTiming =
timing.nest(translationRequested->getDescription());
MLIRContext context;
context.allowUnregisteredDialects(allowUnregisteredDialects);
context.printOpOnDiagnostic(verifyDiagnostics.getNumOccurrences() == 0);
auto sourceMgr = std::make_shared<llvm::SourceMgr>();
sourceMgr->AddNewSourceBuffer(std::move(ownedBuffer), SMLoc());
if (verifyDiagnostics.getNumOccurrences()) {
// In the diagnostic verification flow, we ignore whether the
// translation failed (in most cases, it is expected to fail) and we do
// not filter non-error diagnostics even if `errorDiagnosticsOnly` is
// set. Instead, we check if the diagnostics were produced as expected.
SourceMgrDiagnosticVerifierHandler sourceMgrHandler(
*sourceMgr, &context, verifyDiagnostics);
(void)(*translationRequested)(sourceMgr, os, &context);
result = sourceMgrHandler.verify();
} else if (errorDiagnosticsOnly) {
SourceMgrDiagnosticHandler sourceMgrHandler(*sourceMgr, &context);
ErrorDiagnosticFilter diagnosticFilter(&context);
result = (*translationRequested)(sourceMgr, *stream, &context);
} else {
SourceMgrDiagnosticHandler sourceMgrHandler(*sourceMgr, &context);
result = (*translationRequested)(sourceMgr, *stream, &context);
}
if (failed(result))
return result;
if (i < e - 1) {
// If there are further translations, create a new buffer with the
// output data.
dataIn = dataOut;
dataOut.clear();
ownedBuffer = llvm::MemoryBuffer::getMemBuffer(dataIn);
}
}
return result;
};
if (failed(splitAndProcessBuffer(std::move(input), processBuffer,
output->os(), inputSplitMarker,
outputSplitMarker)))
return failure();
output->keep();
return success();
}
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