55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
//===- CFGLoopInfo.h - LoopInfo analysis for region bodies ------*- 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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//
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// This file defines the CFGLoopInfo analysis for MLIR. The CFGLoopInfo is used
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// to identify natural loops and determine the loop depth of various nodes of a
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// CFG.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MLIR_ANALYSIS_LOOPINFO_H
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#define MLIR_ANALYSIS_LOOPINFO_H
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#include "mlir/IR/Dominance.h"
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#include "mlir/IR/RegionGraphTraits.h"
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#include "llvm/Support/GenericLoopInfo.h"
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namespace mlir {
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class CFGLoop;
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class CFGLoopInfo;
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} // namespace mlir
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namespace llvm {
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// Implementation in LLVM's LoopInfoImpl.h
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extern template class LoopBase<mlir::Block, mlir::CFGLoop>;
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extern template class LoopInfoBase<mlir::Block, mlir::CFGLoop>;
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} // namespace llvm
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namespace mlir {
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/// Representation of a single loop formed by blocks. The inherited LoopBase
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/// class provides accessors to the loop analysis.
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class CFGLoop : public llvm::LoopBase<mlir::Block, mlir::CFGLoop> {
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private:
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explicit CFGLoop(mlir::Block *block);
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friend class llvm::LoopBase<mlir::Block, CFGLoop>;
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friend class llvm::LoopInfoBase<mlir::Block, CFGLoop>;
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};
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/// An LLVM LoopInfo instantiation for MLIR that provides access to CFG loops
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/// found in the dominator tree.
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class CFGLoopInfo : public llvm::LoopInfoBase<mlir::Block, mlir::CFGLoop> {
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public:
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CFGLoopInfo(const llvm::DominatorTreeBase<mlir::Block, false> &domTree);
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};
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} // namespace mlir
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#endif // MLIR_ANALYSIS_LOOPINFO_H
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