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| //===--------------------- SourceMgr.h --------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
/// \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_MCA_SOURCEMGR_H
#define LLVM_MCA_SOURCEMGR_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/MCA/Instruction.h"
namespace llvm {
namespace mca {
// MSVC >= 19.15, < 19.20 need to see the definition of class Instruction to
// prevent compiler error C2139 about intrinsic type trait '__is_assignable'.
typedef std::pair<unsigned, const Instruction &> SourceRef;
class SourceMgr {
using UniqueInst = std::unique_ptr<Instruction>;
ArrayRef<UniqueInst> Sequence;
unsigned Current;
const unsigned Iterations;
static const unsigned DefaultIterations = 100;
public:
SourceMgr(ArrayRef<UniqueInst> S, unsigned Iter)
: Sequence(S), Current(0), Iterations(Iter ? Iter : DefaultIterations) {}
unsigned getNumIterations() const { return Iterations; }
unsigned size() const { return Sequence.size(); }
bool hasNext() const { return Current < (Iterations * Sequence.size()); }
void updateNext() { ++Current; }
SourceRef peekNext() const {
assert(hasNext() && "Already at end of sequence!");
return SourceRef(Current, *Sequence[Current % Sequence.size()]);
}
using const_iterator = ArrayRef<UniqueInst>::const_iterator;
const_iterator begin() const { return Sequence.begin(); }
const_iterator end() const { return Sequence.end(); }
};
} // namespace mca
} // namespace llvm
#endif // LLVM_MCA_SOURCEMGR_H
|