92 lines
3.0 KiB
C
92 lines
3.0 KiB
C
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//===-- WebAssemblySortRegion.h - WebAssembly Sort SortRegion ----*- 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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/// \file
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/// \brief This file implements regions used in CFGSort and CFGStackify.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYSORTREGION_H
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#define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYSORTREGION_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/iterator_range.h"
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namespace llvm {
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class MachineBasicBlock;
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class MachineLoop;
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class MachineLoopInfo;
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class WebAssemblyException;
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class WebAssemblyExceptionInfo;
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namespace WebAssembly {
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// Wrapper for loops and exceptions
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class SortRegion {
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public:
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virtual ~SortRegion() = default;
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virtual MachineBasicBlock *getHeader() const = 0;
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virtual bool contains(const MachineBasicBlock *MBB) const = 0;
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virtual unsigned getNumBlocks() const = 0;
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using block_iterator = typename ArrayRef<MachineBasicBlock *>::const_iterator;
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virtual iterator_range<block_iterator> blocks() const = 0;
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virtual bool isLoop() const = 0;
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};
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template <typename T> class ConcreteSortRegion : public SortRegion {
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const T *Unit;
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public:
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ConcreteSortRegion(const T *Unit) : Unit(Unit) {}
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MachineBasicBlock *getHeader() const override { return Unit->getHeader(); }
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bool contains(const MachineBasicBlock *MBB) const override {
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return Unit->contains(MBB);
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}
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unsigned getNumBlocks() const override { return Unit->getNumBlocks(); }
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iterator_range<block_iterator> blocks() const override {
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return Unit->blocks();
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}
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bool isLoop() const override { return false; }
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};
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// This class has information of nested SortRegions; this is analogous to what
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// LoopInfo is for loops.
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class SortRegionInfo {
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friend class ConcreteSortRegion<MachineLoopInfo>;
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friend class ConcreteSortRegion<WebAssemblyException>;
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const MachineLoopInfo &MLI;
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const WebAssemblyExceptionInfo &WEI;
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DenseMap<const MachineLoop *, std::unique_ptr<SortRegion>> LoopMap;
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DenseMap<const WebAssemblyException *, std::unique_ptr<SortRegion>>
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ExceptionMap;
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public:
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SortRegionInfo(const MachineLoopInfo &MLI,
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const WebAssemblyExceptionInfo &WEI)
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: MLI(MLI), WEI(WEI) {}
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// Returns a smallest loop or exception that contains MBB
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const SortRegion *getRegionFor(const MachineBasicBlock *MBB);
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// Return the "bottom" block among all blocks dominated by the region
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// (MachineLoop or WebAssemblyException) header. This works when the entity is
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// discontiguous.
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MachineBasicBlock *getBottom(const SortRegion *R);
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MachineBasicBlock *getBottom(const MachineLoop *ML);
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MachineBasicBlock *getBottom(const WebAssemblyException *WE);
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};
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} // end namespace WebAssembly
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} // end namespace llvm
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#endif
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