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