1//=- llvm/CodeGen/MultiHazardRecognizer.h - Scheduling Support ----*- 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 implements the MultiHazardRecognizer class, which is a wrapper
10// for a set of ScheduleHazardRecognizer instances
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_CODEGEN_MULTIHAZARDRECOGNIZER_H
15#define LLVM_CODEGEN_MULTIHAZARDRECOGNIZER_H
16
17#include "llvm/ADT/SmallVector.h"
18#include "llvm/CodeGen/ScheduleHazardRecognizer.h"
19
20namespace llvm {
21
22class MachineInstr;
23class SUnit;
24
25class MultiHazardRecognizer : public ScheduleHazardRecognizer {
26  SmallVector<std::unique_ptr<ScheduleHazardRecognizer>, 4> Recognizers;
27
28public:
29  MultiHazardRecognizer() = default;
30  void AddHazardRecognizer(std::unique_ptr<ScheduleHazardRecognizer> &&);
31
32  bool atIssueLimit() const override;
33  HazardType getHazardType(SUnit *, int Stalls = 0) override;
34  void Reset() override;
35  void EmitInstruction(SUnit *) override;
36  void EmitInstruction(MachineInstr *) override;
37  unsigned PreEmitNoops(SUnit *) override;
38  unsigned PreEmitNoops(MachineInstr *) override;
39  bool ShouldPreferAnother(SUnit *) override;
40  void AdvanceCycle() override;
41  void RecedeCycle() override;
42  void EmitNoop() override;
43};
44
45} // end namespace llvm
46
47#endif // LLVM_CODEGEN_MULTIHAZARDRECOGNIZER_H
48