/usr/include/llvm-3.9/llvm/CodeGen/MachineBlockFrequencyInfo.h is in llvm-3.9-dev 1:3.9.1-19ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 | //===- MachineBlockFrequencyInfo.h - MBB Frequency Analysis -*- C++ -*-----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Loops should be simplified before this analysis.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_MACHINEBLOCKFREQUENCYINFO_H
#define LLVM_CODEGEN_MACHINEBLOCKFREQUENCYINFO_H
#include "llvm/ADT/Optional.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/Support/BlockFrequency.h"
#include <climits>
namespace llvm {
class MachineBasicBlock;
class MachineBranchProbabilityInfo;
template <class BlockT> class BlockFrequencyInfoImpl;
/// MachineBlockFrequencyInfo pass uses BlockFrequencyInfoImpl implementation
/// to estimate machine basic block frequencies.
class MachineBlockFrequencyInfo : public MachineFunctionPass {
typedef BlockFrequencyInfoImpl<MachineBasicBlock> ImplType;
std::unique_ptr<ImplType> MBFI;
public:
static char ID;
MachineBlockFrequencyInfo();
~MachineBlockFrequencyInfo() override;
void getAnalysisUsage(AnalysisUsage &AU) const override;
bool runOnMachineFunction(MachineFunction &F) override;
void releaseMemory() override;
/// getblockFreq - Return block frequency. Return 0 if we don't have the
/// information. Please note that initial frequency is equal to 1024. It means
/// that we should not rely on the value itself, but only on the comparison to
/// the other block frequencies. We do this to avoid using of floating points.
///
BlockFrequency getBlockFreq(const MachineBasicBlock *MBB) const;
Optional<uint64_t> getBlockProfileCount(const MachineBasicBlock *MBB) const;
const MachineFunction *getFunction() const;
const MachineBranchProbabilityInfo *getMBPI() const;
void view() const;
// Print the block frequency Freq to OS using the current functions entry
// frequency to convert freq into a relative decimal form.
raw_ostream &printBlockFreq(raw_ostream &OS, const BlockFrequency Freq) const;
// Convenience method that attempts to look up the frequency associated with
// BB and print it to OS.
raw_ostream &printBlockFreq(raw_ostream &OS,
const MachineBasicBlock *MBB) const;
uint64_t getEntryFreq() const;
};
}
#endif
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