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//===--------------------- SourceMgr.h --------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
/// This file implements class SourceMgr. Class SourceMgr abstracts the input
/// code sequence (a sequence of MCInst), and assings unique identifiers to
/// every instruction in the sequence.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_MCA_SOURCEMGR_H
#define LLVM_TOOLS_LLVM_MCA_SOURCEMGR_H
#include "llvm/MC/MCInst.h"
#include <vector>
namespace mca {
typedef std::pair<unsigned, const llvm::MCInst *> SourceRef;
class SourceMgr {
using InstVec = std::vector<std::unique_ptr<const llvm::MCInst>>;
const InstVec &Sequence;
unsigned Current;
unsigned Iterations;
static const unsigned DefaultIterations = 100;
public:
SourceMgr(const InstVec &MCInstSequence, unsigned NumIterations)
: Sequence(MCInstSequence), Current(0),
Iterations(NumIterations ? NumIterations : DefaultIterations) {}
unsigned getCurrentIteration() const { return Current / Sequence.size(); }
unsigned getNumIterations() const { return Iterations; }
unsigned size() const { return Sequence.size(); }
const InstVec &getSequence() const { return Sequence; }
bool hasNext() const { return Current < (Iterations * size()); }
void updateNext() { Current++; }
const SourceRef peekNext() const {
assert(hasNext() && "Already at end of sequence!");
unsigned Index = getCurrentInstructionIndex();
return SourceRef(Current, Sequence[Index].get());
}
unsigned getCurrentInstructionIndex() const {
return Current % Sequence.size();
}
const llvm::MCInst &getMCInstFromIndex(unsigned Index) const {
return *Sequence[Index % size()];
}
bool isEmpty() const { return size() == 0; }
};
} // namespace mca
#endif
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