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  1. //===------ DeLICM.h --------------------------------------------*- C++ -*-===//
  2. //
  3. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4. // See https://llvm.org/LICENSE.txt for license information.
  5. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8. //
  9. // Undo the effect of Loop Invariant Code Motion (LICM) and
  10. // GVN Partial Redundancy Elimination (PRE) on SCoP-level.
  11. //
  12. // Namely, remove register/scalar dependencies by mapping them back to array
  13. // elements.
  14. //
  15. //===----------------------------------------------------------------------===//
  16.  
  17. #ifndef POLLY_DELICM_H
  18. #define POLLY_DELICM_H
  19.  
  20. #include "polly/ScopPass.h"
  21. #include "isl/isl-noexceptions.h"
  22.  
  23. namespace llvm {
  24. class PassRegistry;
  25. class Pass;
  26. class raw_ostream;
  27. } // namespace llvm
  28.  
  29. namespace polly {
  30. /// Create a new DeLICM pass instance.
  31. llvm::Pass *createDeLICMWrapperPass();
  32. llvm::Pass *createDeLICMPrinterLegacyPass(llvm::raw_ostream &OS);
  33.  
  34. struct DeLICMPass final : llvm::PassInfoMixin<DeLICMPass> {
  35.   DeLICMPass() {}
  36.  
  37.   llvm::PreservedAnalyses run(Scop &S, ScopAnalysisManager &SAM,
  38.                               ScopStandardAnalysisResults &SAR, SPMUpdater &U);
  39. };
  40.  
  41. struct DeLICMPrinterPass final : llvm::PassInfoMixin<DeLICMPrinterPass> {
  42.   DeLICMPrinterPass(raw_ostream &OS) : OS(OS) {}
  43.  
  44.   PreservedAnalyses run(Scop &S, ScopAnalysisManager &,
  45.                         ScopStandardAnalysisResults &SAR, SPMUpdater &);
  46.  
  47. private:
  48.   llvm::raw_ostream &OS;
  49. };
  50.  
  51. /// Determine whether two lifetimes are conflicting.
  52. ///
  53. /// Used by unittesting.
  54. bool isConflicting(isl::union_set ExistingOccupied,
  55.                    isl::union_set ExistingUnused, isl::union_map ExistingKnown,
  56.                    isl::union_map ExistingWrites,
  57.                    isl::union_set ProposedOccupied,
  58.                    isl::union_set ProposedUnused, isl::union_map ProposedKnown,
  59.                    isl::union_map ProposedWrites,
  60.                    llvm::raw_ostream *OS = nullptr, unsigned Indent = 0);
  61.  
  62. } // namespace polly
  63.  
  64. namespace llvm {
  65. void initializeDeLICMWrapperPassPass(llvm::PassRegistry &);
  66. void initializeDeLICMPrinterLegacyPassPass(llvm::PassRegistry &);
  67. } // namespace llvm
  68.  
  69. #endif /* POLLY_DELICM_H */
  70.