1e8d8bef9SDimitry Andric //===- BasicBlockSectionUtils.h - Utilities for basic block sections --===// 2e8d8bef9SDimitry Andric // 3e8d8bef9SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4e8d8bef9SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5e8d8bef9SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6e8d8bef9SDimitry Andric // 7e8d8bef9SDimitry Andric //===----------------------------------------------------------------------===// 8e8d8bef9SDimitry Andric 9e8d8bef9SDimitry Andric #ifndef LLVM_CODEGEN_BASICBLOCKSECTIONUTILS_H 10e8d8bef9SDimitry Andric #define LLVM_CODEGEN_BASICBLOCKSECTIONUTILS_H 11e8d8bef9SDimitry Andric 12e8d8bef9SDimitry Andric #include "llvm/ADT/STLExtras.h" 13e8d8bef9SDimitry Andric #include "llvm/Support/CommandLine.h" 14e8d8bef9SDimitry Andric 15e8d8bef9SDimitry Andric namespace llvm { 16e8d8bef9SDimitry Andric 17e8d8bef9SDimitry Andric extern cl::opt<std::string> BBSectionsColdTextPrefix; 18e8d8bef9SDimitry Andric 19e8d8bef9SDimitry Andric class MachineFunction; 20e8d8bef9SDimitry Andric class MachineBasicBlock; 21e8d8bef9SDimitry Andric 22e8d8bef9SDimitry Andric using MachineBasicBlockComparator = 23e8d8bef9SDimitry Andric function_ref<bool(const MachineBasicBlock &, const MachineBasicBlock &)>; 24e8d8bef9SDimitry Andric 25e8d8bef9SDimitry Andric void sortBasicBlocksAndUpdateBranches(MachineFunction &MF, 26e8d8bef9SDimitry Andric MachineBasicBlockComparator MBBCmp); 27e8d8bef9SDimitry Andric 28fcaf7f86SDimitry Andric void avoidZeroOffsetLandingPad(MachineFunction &MF); 29fcaf7f86SDimitry Andric 30*5f757f3fSDimitry Andric /// This checks if the source of this function has drifted since this binary was 31*5f757f3fSDimitry Andric /// profiled previously. 32*5f757f3fSDimitry Andric /// For now, we are piggy backing on what PGO does to 33*5f757f3fSDimitry Andric /// detect this with instrumented profiles. PGO emits an hash of the IR and 34*5f757f3fSDimitry Andric /// checks if the hash has changed. Advanced basic block layout is usually done 35*5f757f3fSDimitry Andric /// on top of PGO optimized binaries and hence this check works well in 36*5f757f3fSDimitry Andric /// practice. 37*5f757f3fSDimitry Andric bool hasInstrProfHashMismatch(MachineFunction &MF); 38*5f757f3fSDimitry Andric 39e8d8bef9SDimitry Andric } // end namespace llvm 40e8d8bef9SDimitry Andric 41e8d8bef9SDimitry Andric #endif // LLVM_CODEGEN_BASICBLOCKSECTIONUTILS_H 42