Server : Apache/2.4.41 (Ubuntu) System : Linux absol.cf 5.4.0-198-generic #218-Ubuntu SMP Fri Sep 27 20:18:53 UTC 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.33 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, Directory :  /usr/lib/llvm-10/build/include/llvm/CodeGen/

Upload File : current_dir [ Writeable ] document_root [ Writeable ]

//===-------- EdgeBundles.h - Bundles of CFG edges --------------*- 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
//
//===----------------------------------------------------------------------===//
//
// The EdgeBundles analysis forms equivalence classes of CFG edges such that all
// edges leaving a machine basic block are in the same bundle, and all edges
// leaving a basic block are in the same bundle.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_EDGEBUNDLES_H
#define LLVM_CODEGEN_EDGEBUNDLES_H

#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/IntEqClasses.h"
#include "llvm/ADT/Twine.h"
#include "llvm/CodeGen/MachineFunctionPass.h"

namespace llvm {

class EdgeBundles : public MachineFunctionPass {
  const MachineFunction *MF;

  /// EC - Each edge bundle is an equivalence class. The keys are:
  ///   2*BB->getNumber()   -> Ingoing bundle.
  ///   2*BB->getNumber()+1 -> Outgoing bundle.
  IntEqClasses EC;

  /// Blocks - Map each bundle to a list of basic block numbers.
  SmallVector<SmallVector<unsigned, 8>, 4> Blocks;

public:
  static char ID;
  EdgeBundles() : MachineFunctionPass(ID) {}

  /// getBundle - Return the ingoing (Out = false) or outgoing (Out = true)
  /// bundle number for basic block #N
  unsigned getBundle(unsigned N, bool Out) const { return EC[2 * N + Out]; }

  /// getNumBundles - Return the total number of bundles in the CFG.
  unsigned getNumBundles() const { return EC.getNumClasses(); }

  /// getBlocks - Return an array of blocks that are connected to Bundle.
  ArrayRef<unsigned> getBlocks(unsigned Bundle) const { return Blocks[Bundle]; }

  /// getMachineFunction - Return the last machine function computed.
  const MachineFunction *getMachineFunction() const { return MF; }

  /// view - Visualize the annotated bipartite CFG with Graphviz.
  void view() const;

private:
  bool runOnMachineFunction(MachineFunction&) override;
  void getAnalysisUsage(AnalysisUsage&) const override;
};

} // end namespace llvm

#endif