mlir-reduce.cpp
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//===- mlir-reduce.cpp - The MLIR reducer ---------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file implements the general framework of the MLIR reducer tool. It
// parses the command line arguments, parses the initial MLIR test case and sets
// up the testing environment. It outputs the most reduced test case variant
// after executing the reduction passes.
//
//===----------------------------------------------------------------------===//
#include <vector>
#include "mlir/InitAllDialects.h"
#include "mlir/Parser.h"
#include "mlir/Pass/Pass.h"
#include "mlir/Pass/PassManager.h"
#include "mlir/Reducer/Tester.h"
#include "mlir/Support/FileUtilities.h"
#include "mlir/Support/LogicalResult.h"
#include "mlir/Transforms/Passes.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/ToolOutputFile.h"
using namespace mlir;
static llvm::cl::opt<std::string> inputFilename(llvm::cl::Positional,
llvm::cl::Required,
llvm::cl::desc("<input file>"));
static llvm::cl::opt<std::string>
testFilename("test", llvm::cl::Required, llvm::cl::desc("Testing script"));
static llvm::cl::list<std::string>
testArguments("test-args", llvm::cl::ZeroOrMore,
llvm::cl::desc("Testing script arguments"));
static llvm::cl::opt<std::string>
outputFilename("o",
llvm::cl::desc("Output filename for the reduced test case"),
llvm::cl::init("-"));
// Parse and verify the input MLIR file.
static LogicalResult loadModule(MLIRContext &context, OwningModuleRef &module,
StringRef inputFilename) {
module = parseSourceFile(inputFilename, &context);
if (!module)
return failure();
return success();
}
int main(int argc, char **argv) {
llvm::InitLLVM y(argc, argv);
registerAllDialects();
registerMLIRContextCLOptions();
registerPassManagerCLOptions();
llvm::cl::ParseCommandLineOptions(argc, argv,
"MLIR test case reduction tool.\n");
std::string errorMessage;
auto testscript = openInputFile(testFilename, &errorMessage);
if (!testscript)
llvm::report_fatal_error(errorMessage);
auto output = openOutputFile(outputFilename, &errorMessage);
if (!output)
llvm::report_fatal_error(errorMessage);
mlir::MLIRContext context;
mlir::OwningModuleRef moduleRef;
context.allowUnregisteredDialects(true);
if (failed(loadModule(context, moduleRef, inputFilename)))
llvm::report_fatal_error("Input test case can't be parsed");
// Initialize test environment.
Tester test(testFilename, testArguments);
test.setMostReduced(moduleRef.get());
if (!test.isInteresting(inputFilename))
llvm::report_fatal_error(
"Input test case does not exhibit interesting behavior");
test.getMostReduced().print(output->os());
output->keep();
return 0;
}