1//===-- ARMHazardRecognizer.h - ARM Hazard Recognizers ----------*- C++ -*-===//
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// This file defines hazard recognizers for scheduling ARM functions.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_LIB_TARGET_ARM_ARMHAZARDRECOGNIZER_H
14#define LLVM_LIB_TARGET_ARM_ARMHAZARDRECOGNIZER_H
15
16#include "ARMBaseInstrInfo.h"
17#include "llvm/ADT/BitmaskEnum.h"
18#include "llvm/ADT/SmallVector.h"
19#include "llvm/CodeGen/ScheduleHazardRecognizer.h"
20#include "llvm/Support/DataTypes.h"
21#include <initializer_list>
22
23namespace llvm {
24
25class DataLayout;
26class MachineFunction;
27class MachineInstr;
28class ScheduleDAG;
29
30// Hazards related to FP MLx instructions
31class ARMHazardRecognizerFPMLx : public ScheduleHazardRecognizer {
32 MachineInstr *LastMI = nullptr;
33 unsigned FpMLxStalls = 0;
34
35public:
36 ARMHazardRecognizerFPMLx() { MaxLookAhead = 1; }
37
38 HazardType getHazardType(SUnit *SU, int Stalls) override;
39 void Reset() override;
40 void EmitInstruction(SUnit *SU) override;
41 void AdvanceCycle() override;
42 void RecedeCycle() override;
43};
44
45// Hazards related to bank conflicts
46class ARMBankConflictHazardRecognizer : public ScheduleHazardRecognizer {
47 SmallVector<MachineInstr *, 8> Accesses;
48 const MachineFunction &MF;
49 const DataLayout &DL;
50 int64_t DataMask;
51 bool AssumeITCMBankConflict;
52
53public:
54 ARMBankConflictHazardRecognizer(const ScheduleDAG *DAG, int64_t DDM,
55 bool ABC);
56 HazardType getHazardType(SUnit *SU, int Stalls) override;
57 void Reset() override;
58 void EmitInstruction(SUnit *SU) override;
59 void AdvanceCycle() override;
60 void RecedeCycle() override;
61
62private:
63 inline HazardType CheckOffsets(unsigned O0, unsigned O1);
64};
65
66} // end namespace llvm
67
68#endif
69