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ae65e281f3
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
57 lines
1.8 KiB
C++
57 lines
1.8 KiB
C++
//===--------------------- SourceMgr.h --------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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/// \file
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/// This file implements class SourceMgr. Class SourceMgr abstracts the input
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/// code sequence (a sequence of MCInst), and assings unique identifiers to
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/// every instruction in the sequence.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MCA_SOURCEMGR_H
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#define LLVM_MCA_SOURCEMGR_H
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#include "llvm/ADT/ArrayRef.h"
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namespace llvm {
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namespace mca {
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class Instruction;
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typedef std::pair<unsigned, const Instruction &> SourceRef;
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class SourceMgr {
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using UniqueInst = std::unique_ptr<Instruction>;
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ArrayRef<UniqueInst> Sequence;
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unsigned Current;
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const unsigned Iterations;
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static const unsigned DefaultIterations = 100;
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public:
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SourceMgr(ArrayRef<UniqueInst> S, unsigned Iter)
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: Sequence(S), Current(0), Iterations(Iter ? Iter : DefaultIterations) {}
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unsigned getNumIterations() const { return Iterations; }
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unsigned size() const { return Sequence.size(); }
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bool hasNext() const { return Current < (Iterations * Sequence.size()); }
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void updateNext() { ++Current; }
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SourceRef peekNext() const {
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assert(hasNext() && "Already at end of sequence!");
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return SourceRef(Current, *Sequence[Current % Sequence.size()]);
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}
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using const_iterator = ArrayRef<UniqueInst>::const_iterator;
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const_iterator begin() const { return Sequence.begin(); }
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const_iterator end() const { return Sequence.end(); }
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};
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} // namespace mca
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} // namespace llvm
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#endif // LLVM_MCA_SOURCEMGR_H
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