ArgumentPromotion.h

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//===- ArgumentPromotion.h - Promote by-reference arguments -----*- 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
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_TRANSFORMS_IPO_ARGUMENTPROMOTION_H
#define LLVM_TRANSFORMS_IPO_ARGUMENTPROMOTION_H
 
#include "llvm/Analysis/CGSCCPassManager.h"
#include "llvm/Analysis/LazyCallGraph.h"
#include "llvm/IR/PassManager.h"
 
namespace llvm {
 
/// Argument promotion pass.
///
/// This pass walks the functions in each SCC and for each one tries to
/// transform it and all of its callers to replace indirect arguments with
/// direct (by-value) arguments.
class ArgumentPromotionPass : public PassInfoMixin<ArgumentPromotionPass> {
  unsigned MaxElements;
 
public:
  ArgumentPromotionPass(unsigned MaxElements = 2u) : MaxElements(MaxElements) {}
 
  PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM,
                        LazyCallGraph &CG, CGSCCUpdateResult &UR);
};
 
} // end namespace llvm
 
#endif // LLVM_TRANSFORMS_IPO_ARGUMENTPROMOTION_H