1 //===--------------------- SourceMgr.h --------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 /// \file 10 /// This file implements class SourceMgr. Class SourceMgr abstracts the input 11 /// code sequence (a sequence of MCInst), and assings unique identifiers to 12 /// every instruction in the sequence. 13 /// 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_TOOLS_LLVM_MCA_SOURCEMGR_H 17 #define LLVM_TOOLS_LLVM_MCA_SOURCEMGR_H 18 19 #include "llvm/MC/MCInst.h" 20 #include <vector> 21 22 namespace mca { 23 24 typedef std::pair<unsigned, const llvm::MCInst *> SourceRef; 25 26 class SourceMgr { 27 using InstVec = std::vector<std::unique_ptr<const llvm::MCInst>>; 28 const InstVec &Sequence; 29 unsigned Current; 30 unsigned Iterations; 31 static const unsigned DefaultIterations = 100; 32 33 public: 34 SourceMgr(const InstVec &MCInstSequence, unsigned NumIterations) 35 : Sequence(MCInstSequence), Current(0), 36 Iterations(NumIterations ? NumIterations : DefaultIterations) {} 37 38 unsigned getCurrentIteration() const { return Current / Sequence.size(); } 39 unsigned getNumIterations() const { return Iterations; } 40 unsigned size() const { return Sequence.size(); } 41 const InstVec &getSequence() const { return Sequence; } 42 43 bool hasNext() const { return Current < (Iterations * size()); } 44 void updateNext() { Current++; } 45 46 const SourceRef peekNext() const { 47 unsigned Index = getCurrentInstructionIndex(); 48 return SourceRef(Current, Sequence[Index].get()); 49 } 50 51 unsigned getCurrentInstructionIndex() const { 52 return Current % Sequence.size(); 53 } 54 55 const llvm::MCInst &getMCInstFromIndex(unsigned Index) const { 56 return *Sequence[Index % size()]; 57 } 58 59 bool isEmpty() const { return size() == 0; } 60 }; 61 } // namespace mca 62 63 #endif 64
