LibOpt.cpp

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//===- LibOpt.cpp - Optimize CIR raised C/C++ library idioms --------------===//
//
// 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 pass optimizes C/C++ standard library idioms in Clang IR.
//
//===----------------------------------------------------------------------===//
 
#include "PassDetail.h"
#include "mlir/Dialect/Func/IR/FuncOps.h"
#include "mlir/IR/BuiltinAttributes.h"
#include "mlir/IR/Region.h"
#include "clang/Basic/Module.h"
#include "clang/CIR/Dialect/Builder/CIRBaseBuilder.h"
#include "clang/CIR/Dialect/IR/CIRDialect.h"
#include "clang/CIR/Dialect/Passes.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Path.h"
 
using cir::CIRBaseBuilderTy;
using namespace mlir;
using namespace cir;
 
namespace mlir {
#define GEN_PASS_DEF_LIBOPT
#include "clang/CIR/Dialect/Passes.h.inc"
} // namespace mlir
 
namespace {
 
struct LibOptPass : public impl::LibOptBase<LibOptPass> {
  LibOptPass() = default;
  mlir::LogicalResult
  initializeOptions(llvm::StringRef options,
                    llvm::function_ref<mlir::LogicalResult(const llvm::Twine &)>
                        errorHandler) override;
  void runOnOperation() override;
 
  // Raw libopt option string forwarded by the frontend. This will later control
  // which optimizations the pass enables.
  std::string optimizationOptions;
 
  /// Tracks current module.
  ModuleOp theModule;
};
} // namespace
 
mlir::LogicalResult LibOptPass::initializeOptions(
    llvm::StringRef options,
    llvm::function_ref<mlir::LogicalResult(const llvm::Twine &)> errorHandler) {
  (void)errorHandler;
  optimizationOptions = options.str();
  // TODO(cir): Parse options to select the active transformations for the
  // pass.
  return mlir::success();
}
 
void LibOptPass::runOnOperation() {
  auto *op = getOperation();
  if (isa<::mlir::ModuleOp>(op))
    theModule = cast<::mlir::ModuleOp>(op);
}
 
std::unique_ptr<Pass> mlir::createLibOptPass() {
  return std::make_unique<LibOptPass>();
}