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       1             : //===- ArgumentPromotion.h - Promote by-reference arguments -----*- C++ -*-===//
       2             : //
       3             : //                     The LLVM Compiler Infrastructure
       4             : //
       5             : // This file is distributed under the University of Illinois Open Source
       6             : // License. See LICENSE.TXT for details.
       7             : //
       8             : //===----------------------------------------------------------------------===//
       9             : 
      10             : #ifndef LLVM_TRANSFORMS_IPO_ARGUMENTPROMOTION_H
      11             : #define LLVM_TRANSFORMS_IPO_ARGUMENTPROMOTION_H
      12             : 
      13             : #include "llvm/Analysis/CGSCCPassManager.h"
      14             : #include "llvm/Analysis/LazyCallGraph.h"
      15             : #include "llvm/IR/PassManager.h"
      16             : 
      17             : namespace llvm {
      18             : 
      19             : /// Argument promotion pass.
      20             : ///
      21             : /// This pass walks the functions in each SCC and for each one tries to
      22             : /// transform it and all of its callers to replace indirect arguments with
      23             : /// direct (by-value) arguments.
      24             : class ArgumentPromotionPass : public PassInfoMixin<ArgumentPromotionPass> {
      25             :   unsigned MaxElements;
      26             : 
      27             : public:
      28          34 :   ArgumentPromotionPass(unsigned MaxElements = 3u) : MaxElements(MaxElements) {}
      29             : 
      30             :   PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM,
      31             :                         LazyCallGraph &CG, CGSCCUpdateResult &UR);
      32             : };
      33             : 
      34             : } // end namespace llvm
      35             : 
      36             : #endif // LLVM_TRANSFORMS_IPO_ARGUMENTPROMOTION_H