58 lines
2.0 KiB
C
58 lines
2.0 KiB
C
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//===--------------------- 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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#include "llvm/MCA/Instruction.h"
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namespace llvm {
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namespace mca {
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// MSVC >= 19.15, < 19.20 need to see the definition of class Instruction to
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// prevent compiler error C2139 about intrinsic type trait '__is_assignable'.
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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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