mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-22 20:43:44 +02:00
8bf39bca17
Summary: Refactored the profitability analysis out of the IC promotion pass and into lib/Analysis so that it can be accessed by the summary index builder in a follow-on patch to enable IC promotion in ThinLTO (D21932). Reviewers: davidxl, xur Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D22182 llvm-svn: 275216
68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
//===- IndirectCallPromotionAnalysis.h - Indirect call analysis -*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
/// \file
|
|
/// Interface to identify indirect call promotion candidates.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_ANALYSIS_INDIRECTCALLPROMOTIONANALYSIS_H
|
|
#define LLVM_ANALYSIS_INDIRECTCALLPROMOTIONANALYSIS_H
|
|
|
|
#include "llvm/ProfileData/InstrProf.h"
|
|
|
|
namespace llvm {
|
|
|
|
class Instruction;
|
|
|
|
// Class for identifying profitable indirect call promotion candidates when
|
|
// the indirect-call value profile metadata is available.
|
|
class ICallPromotionAnalysis {
|
|
private:
|
|
// Allocate space to read the profile annotation.
|
|
std::unique_ptr<InstrProfValueData[]> ValueDataArray;
|
|
|
|
// Count is the call count for the direct-call target and
|
|
// TotalCount is the call count for the indirect-call callsite.
|
|
// Return true we should promote this indirect-call target.
|
|
bool isPromotionProfitable(uint64_t Count, uint64_t TotalCount);
|
|
|
|
// Returns the number of profitable candidates to promote for the
|
|
// current ValueDataArray and the given \p Inst.
|
|
uint32_t getProfitablePromotionCandidates(const Instruction *Inst,
|
|
uint32_t NumVals,
|
|
uint64_t TotalCount);
|
|
|
|
// Noncopyable
|
|
ICallPromotionAnalysis(const ICallPromotionAnalysis &other) = delete;
|
|
ICallPromotionAnalysis &
|
|
operator=(const ICallPromotionAnalysis &other) = delete;
|
|
|
|
public:
|
|
ICallPromotionAnalysis();
|
|
|
|
/// \brief Returns reference to array of InstrProfValueData for the given
|
|
/// instruction \p I.
|
|
///
|
|
/// The \p NumVals, \p TotalCount and \p NumCandidates
|
|
/// are set to the number of values in the array, the total profile count
|
|
/// of the indirect call \p I, and the number of profitable candidates
|
|
/// in the given array (which is sorted in reverse order of profitability).
|
|
///
|
|
/// The returned array space is owned by this class, and overwritten on
|
|
/// subsequent calls.
|
|
ArrayRef<InstrProfValueData>
|
|
getPromotionCandidatesForInstruction(const Instruction *I, uint32_t &NumVals,
|
|
uint64_t &TotalCount,
|
|
uint32_t &NumCandidates);
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|