83 lines
3.3 KiB
C++
83 lines
3.3 KiB
C++
//===- llvm/CodeGen/MachineDomTreeUpdater.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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file exposes interfaces to post dominance information for
|
|
// target-specific code.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CODEGEN_MACHINEDOMTREEUPDATER_H
|
|
#define LLVM_CODEGEN_MACHINEDOMTREEUPDATER_H
|
|
|
|
#include "llvm/Analysis/GenericDomTreeUpdater.h"
|
|
#include "llvm/CodeGen/MachineDominators.h"
|
|
#include "llvm/Support/Compiler.h"
|
|
|
|
namespace llvm {
|
|
|
|
class MachinePostDominatorTree;
|
|
class MachineDomTreeUpdater;
|
|
|
|
extern template class LLVM_TEMPLATE_ABI GenericDomTreeUpdater<
|
|
MachineDomTreeUpdater, MachineDominatorTree, MachinePostDominatorTree>;
|
|
|
|
extern template LLVM_TEMPLATE_ABI void
|
|
GenericDomTreeUpdater<MachineDomTreeUpdater, MachineDominatorTree,
|
|
MachinePostDominatorTree>::recalculate(MachineFunction
|
|
&MF);
|
|
|
|
extern template LLVM_TEMPLATE_ABI void GenericDomTreeUpdater<
|
|
MachineDomTreeUpdater, MachineDominatorTree,
|
|
MachinePostDominatorTree>::applyUpdatesImpl</*IsForward=*/true>();
|
|
extern template LLVM_TEMPLATE_ABI void GenericDomTreeUpdater<
|
|
MachineDomTreeUpdater, MachineDominatorTree,
|
|
MachinePostDominatorTree>::applyUpdatesImpl</*IsForward=*/false>();
|
|
|
|
class MachineDomTreeUpdater
|
|
: public GenericDomTreeUpdater<MachineDomTreeUpdater, MachineDominatorTree,
|
|
MachinePostDominatorTree> {
|
|
friend GenericDomTreeUpdater<MachineDomTreeUpdater, MachineDominatorTree,
|
|
MachinePostDominatorTree>;
|
|
|
|
public:
|
|
using Base =
|
|
GenericDomTreeUpdater<MachineDomTreeUpdater, MachineDominatorTree,
|
|
MachinePostDominatorTree>;
|
|
using Base::Base;
|
|
|
|
~MachineDomTreeUpdater() { flush(); }
|
|
|
|
///@{
|
|
/// \name Mutation APIs
|
|
///
|
|
|
|
/// Delete DelBB. DelBB will be removed from its Parent and
|
|
/// erased from available trees if it exists and finally get deleted.
|
|
/// Under Eager UpdateStrategy, DelBB will be processed immediately.
|
|
/// Under Lazy UpdateStrategy, DelBB will be queued until a flush event and
|
|
/// all available trees are up-to-date. Assert if any instruction of DelBB is
|
|
/// modified while awaiting deletion. When both DT and PDT are nullptrs, DelBB
|
|
/// will be queued until flush() is called.
|
|
LLVM_ABI void deleteBB(MachineBasicBlock *DelBB);
|
|
|
|
///@}
|
|
|
|
private:
|
|
/// First remove all the instructions of DelBB and then make sure DelBB has a
|
|
/// valid terminator instruction which is necessary to have when DelBB still
|
|
/// has to be inside of its parent Function while awaiting deletion under Lazy
|
|
/// UpdateStrategy to prevent other routines from asserting the state of the
|
|
/// IR is inconsistent. Assert if DelBB is nullptr or has predecessors.
|
|
void validateDeleteBB(MachineBasicBlock *DelBB);
|
|
|
|
/// Returns true if at least one MachineBasicBlock is deleted.
|
|
bool forceFlushDeletedBB();
|
|
};
|
|
} // namespace llvm
|
|
#endif // LLVM_CODEGEN_MACHINEDOMTREEUPDATER_H
|