ModuleSummaryAnalysis.h

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//===- ModuleSummaryAnalysis.h - Module summary index builder ---*- 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
//
//===----------------------------------------------------------------------===//
/// \file
/// This is the interface to build a ModuleSummaryIndex for a module.
///
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_ANALYSIS_MODULESUMMARYANALYSIS_H
#define LLVM_ANALYSIS_MODULESUMMARYANALYSIS_H
 
#include "llvm/IR/ModuleSummaryIndex.h"
#include "llvm/IR/PassManager.h"
#include "llvm/Pass.h"
#include "llvm/Support/Compiler.h"
#include <functional>
#include <optional>
 
namespace llvm {
 
class BlockFrequencyInfo;
class Function;
class LLVMContext;
class Module;
class ProfileSummaryInfo;
class StackSafetyInfo;
 
/// Return -module-summary-max-indirect-edges.
LLVM_ABI unsigned getMaxSummaryIndirectEdges(const LLVMContext &C);
 
/// Direct function to compute a \c ModuleSummaryIndex from a given module.
///
/// If operating within a pass manager which has defined ways to compute the \c
/// BlockFrequencyInfo for a given function, that can be provided via
/// a std::function callback. Otherwise, this routine will manually construct
/// that information.
LLVM_ABI ModuleSummaryIndex buildModuleSummaryIndex(
    const Module &M,
    std::function<BlockFrequencyInfo *(const Function &F)> GetBFICallback,
    ProfileSummaryInfo *PSI,
    std::function<const StackSafetyInfo *(const Function &F)> GetSSICallback =
        [](const Function &F) -> const StackSafetyInfo * { return nullptr; });
 
/// Analysis pass to provide the ModuleSummaryIndex object.
class ModuleSummaryIndexAnalysis
    : public AnalysisInfoMixin<ModuleSummaryIndexAnalysis> {
  friend AnalysisInfoMixin<ModuleSummaryIndexAnalysis>;
 
  LLVM_ABI static AnalysisKey Key;
 
public:
  using Result = ModuleSummaryIndex;
 
  LLVM_ABI Result run(Module &M, ModuleAnalysisManager &AM);
};
 
/// Legacy wrapper pass to provide the ModuleSummaryIndex object.
class LLVM_ABI ModuleSummaryIndexWrapperPass : public ModulePass {
  std::optional<ModuleSummaryIndex> Index;
 
public:
  static char ID;
 
  ModuleSummaryIndexWrapperPass();
 
  /// Get the index built by pass
  ModuleSummaryIndex &getIndex() { return *Index; }
  const ModuleSummaryIndex &getIndex() const { return *Index; }
 
  bool runOnModule(Module &M) override;
  bool doFinalization(Module &M) override;
  void getAnalysisUsage(AnalysisUsage &AU) const override;
};
 
//===--------------------------------------------------------------------===//
//
// createModuleSummaryIndexWrapperPass - This pass builds a ModuleSummaryIndex
// object for the module, to be written to bitcode or LLVM assembly.
//
LLVM_ABI ModulePass *createModuleSummaryIndexWrapperPass();
 
/// Legacy wrapper pass to provide the ModuleSummaryIndex object.
class LLVM_ABI ImmutableModuleSummaryIndexWrapperPass : public ImmutablePass {
  const ModuleSummaryIndex *Index;
 
public:
  static char ID;
 
  ImmutableModuleSummaryIndexWrapperPass(
      const ModuleSummaryIndex *Index = nullptr);
  const ModuleSummaryIndex *getIndex() const { return Index; }
  void getAnalysisUsage(AnalysisUsage &AU) const override;
};
 
/// NPM analysis to provide an externally-built ModuleSummaryIndex (e.g. the
/// combined index from LTO).
class ImmutableModuleSummaryIndexAnalysis
    : public AnalysisInfoMixin<ImmutableModuleSummaryIndexAnalysis> {
  friend AnalysisInfoMixin<ImmutableModuleSummaryIndexAnalysis>;
  LLVM_ABI static AnalysisKey Key;
  const ModuleSummaryIndex *Index = nullptr;
 
public:
  class Result {
    const ModuleSummaryIndex *Index = nullptr;
    Result(const ModuleSummaryIndex *Index) : Index(Index) {}
    friend class ImmutableModuleSummaryIndexAnalysis;
 
  public:
    const ModuleSummaryIndex *getIndex() const { return Index; }
    bool invalidate(Module &, const PreservedAnalyses &,
                    ModuleAnalysisManager::Invalidator &) {
      return false;
    }
  };
 
  ImmutableModuleSummaryIndexAnalysis() = default;
  ImmutableModuleSummaryIndexAnalysis(const ModuleSummaryIndex *Index)
      : Index(Index) {}
 
  Result run(Module &M, ModuleAnalysisManager &AM) { return Result(Index); }
};
 
//===--------------------------------------------------------------------===//
//
// ImmutableModuleSummaryIndexWrapperPass - This pass wrap provided
// ModuleSummaryIndex object for the module, to be used by other passes.
//
LLVM_ABI ImmutablePass *
createImmutableModuleSummaryIndexWrapperPass(const ModuleSummaryIndex *Index);
 
/// Returns true if the instruction could have memprof metadata, used to ensure
/// consistency between summary analysis and the ThinLTO backend processing.
LLVM_ABI bool mayHaveMemprofSummary(const CallBase *CB);
 
} // end namespace llvm
 
#endif // LLVM_ANALYSIS_MODULESUMMARYANALYSIS_H