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//===- ModuleSummaryAnalysis.h - Module summary index builder ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
/// This is the interface to build a ModuleSummaryIndex for a module.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_ANALYSIS_MODULESUMMARYANALYSIS_H
#define LLVM_ANALYSIS_MODULESUMMARYANALYSIS_H
#include "llvm/ADT/STLExtras.h"
#include "llvm/IR/ModuleSummaryIndex.h"
#include "llvm/Pass.h"
namespace llvm {
class BlockFrequencyInfo;
/// Class to build a module summary index for the given Module, possibly from
/// a Pass.
class ModuleSummaryIndexBuilder {
/// The index being built
std::unique_ptr<ModuleSummaryIndex> Index;
/// The module for which we are building an index
const Module *M;
public:
/// Default constructor
ModuleSummaryIndexBuilder() = default;
/// Constructor that builds an index for the given Module. An optional
/// callback can be supplied to obtain the frequency info for a function.
ModuleSummaryIndexBuilder(
const Module *M,
std::function<BlockFrequencyInfo *(const Function &F)> Ftor = nullptr);
/// Get a reference to the index owned by builder
ModuleSummaryIndex &getIndex() const { return *Index; }
/// Take ownership of the built index
std::unique_ptr<ModuleSummaryIndex> takeIndex() { return std::move(Index); }
private:
/// Compute summary for given function with optional frequency information
void computeFunctionSummary(const Function &F,
BlockFrequencyInfo *BFI = nullptr);
/// Compute summary for given variable with optional frequency information
void computeVariableSummary(const GlobalVariable &V);
};
/// Legacy wrapper pass to provide the ModuleSummaryIndex object.
class ModuleSummaryIndexWrapperPass : public ModulePass {
std::unique_ptr<ModuleSummaryIndexBuilder> IndexBuilder;
public:
static char ID;
ModuleSummaryIndexWrapperPass();
/// Get the index built by pass
ModuleSummaryIndex &getIndex() { return IndexBuilder->getIndex(); }
const ModuleSummaryIndex &getIndex() const {
return IndexBuilder->getIndex();
}
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.
//
ModulePass *createModuleSummaryIndexWrapperPass();
/// Returns true if \p M is eligible for ThinLTO promotion.
///
/// Currently we check if it has any any InlineASM that uses an internal symbol.
bool moduleCanBeRenamedForThinLTO(const Module &M);
}
#endif
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