tco.cpp
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//===- tco.cpp - Tilikum Crossing Opt ---------------------------*- C++ -*-===//
//
// 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 is to be like LLVM's opt program, only for FIR. Such a program is
// required for roundtrip testing, etc.
//
//===----------------------------------------------------------------------===//
#include "flang/Optimizer/Dialect/FIRDialect.h"
#include "flang/Optimizer/Support/KindMapping.h"
#include "mlir/IR/MLIRContext.h"
#include "mlir/IR/Module.h"
#include "mlir/Parser.h"
#include "mlir/Pass/Pass.h"
#include "mlir/Pass/PassManager.h"
#include "mlir/Transforms/Passes.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
static cl::opt<std::string>
inputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
static cl::opt<std::string> outputFilename("o",
cl::desc("Specify output filename"),
cl::value_desc("filename"),
cl::init("-"));
static cl::opt<bool> emitFir("emit-fir",
cl::desc("Parse and pretty-print the input"),
cl::init(false));
static void printModuleBody(mlir::ModuleOp mod, raw_ostream &output) {
for (auto &op : mod.getBody()->without_terminator())
output << op << '\n';
}
// compile a .fir file
static int compileFIR() {
// check that there is a file to load
ErrorOr<std::unique_ptr<MemoryBuffer>> fileOrErr =
MemoryBuffer::getFileOrSTDIN(inputFilename);
if (std::error_code EC = fileOrErr.getError()) {
errs() << "Could not open file: " << EC.message() << '\n';
return 1;
}
// load the file into a module
SourceMgr sourceMgr;
sourceMgr.AddNewSourceBuffer(std::move(*fileOrErr), SMLoc());
mlir::MLIRContext context;
fir::registerFIRDialects(context.getDialectRegistry());
auto owningRef = mlir::parseSourceFile(sourceMgr, &context);
if (!owningRef) {
errs() << "Error can't load file " << inputFilename << '\n';
return 2;
}
if (mlir::failed(owningRef->verify())) {
errs() << "Error verifying FIR module\n";
return 4;
}
std::error_code ec;
ToolOutputFile out(outputFilename, ec, sys::fs::OF_None);
// run passes
mlir::PassManager pm{&context};
mlir::applyPassManagerCLOptions(pm);
if (emitFir) {
// parse the input and pretty-print it back out
// -emit-fir intentionally disables all the passes
} else {
// TODO: Actually add passes when added to FIR code base
// add all the passes
// the user can disable them individually
}
// run the pass manager
if (mlir::succeeded(pm.run(*owningRef))) {
// passes ran successfully, so keep the output
if (emitFir)
printModuleBody(*owningRef, out.os());
out.keep();
return 0;
}
// pass manager failed
printModuleBody(*owningRef, errs());
errs() << "\n\nFAILED: " << inputFilename << '\n';
return 8;
}
int main(int argc, char **argv) {
fir::registerFIRPasses();
[[maybe_unused]] InitLLVM y(argc, argv);
mlir::registerPassManagerCLOptions();
mlir::PassPipelineCLParser passPipe("", "Compiler passes to run");
cl::ParseCommandLineOptions(argc, argv, "Tilikum Crossing Optimizer\n");
return compileFIR();
}