LLVM 17.0.0git
ARMHazardRecognizer.h
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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"
21#include <array>
22#include <initializer_list>
23
24namespace llvm {
25
26class DataLayout;
27class MachineFunction;
28class MachineInstr;
29class ScheduleDAG;
30
31// Hazards related to FP MLx instructions
33 MachineInstr *LastMI = nullptr;
34 unsigned FpMLxStalls = 0;
35
36public:
38
39 HazardType getHazardType(SUnit *SU, int Stalls) override;
40 void Reset() override;
41 void EmitInstruction(SUnit *SU) override;
42 void AdvanceCycle() override;
43 void RecedeCycle() override;
44};
45
46// Hazards related to bank conflicts
49 const MachineFunction &MF;
50 const DataLayout &DL;
51 int64_t DataMask;
52 bool AssumeITCMBankConflict;
53
54public:
55 ARMBankConflictHazardRecognizer(const ScheduleDAG *DAG, int64_t DDM,
56 bool ABC);
57 HazardType getHazardType(SUnit *SU, int Stalls) override;
58 void Reset() override;
59 void EmitInstruction(SUnit *SU) override;
60 void AdvanceCycle() override;
61 void RecedeCycle() override;
62
63private:
64 inline HazardType CheckOffsets(unsigned O0, unsigned O1);
65};
66
67} // end namespace llvm
68
69#endif
This file defines the SmallVector class.
void Reset() override
Reset - This callback is invoked when a new block of instructions is about to be schedule.
void AdvanceCycle() override
AdvanceCycle - This callback is invoked whenever the next top-down instruction to be scheduled cannot...
void EmitInstruction(SUnit *SU) override
EmitInstruction - This callback is invoked when an instruction is emitted, to advance the hazard stat...
void RecedeCycle() override
RecedeCycle - This callback is invoked whenever the next bottom-up instruction to be scheduled cannot...
HazardType getHazardType(SUnit *SU, int Stalls) override
getHazardType - Return the hazard type of emitting this node.
void EmitInstruction(SUnit *SU) override
EmitInstruction - This callback is invoked when an instruction is emitted, to advance the hazard stat...
void RecedeCycle() override
RecedeCycle - This callback is invoked whenever the next bottom-up instruction to be scheduled cannot...
void AdvanceCycle() override
AdvanceCycle - This callback is invoked whenever the next top-down instruction to be scheduled cannot...
void Reset() override
Reset - This callback is invoked when a new block of instructions is about to be schedule.
HazardType getHazardType(SUnit *SU, int Stalls) override
getHazardType - Return the hazard type of emitting this node.
A parsed version of the target data layout string in and methods for querying it.
Definition: DataLayout.h:114
Representation of each machine instruction.
Definition: MachineInstr.h:68
Scheduling unit. This is a node in the scheduling DAG.
Definition: ScheduleDAG.h:242
HazardRecognizer - This determines whether or not an instruction can be issued this cycle,...
unsigned MaxLookAhead
MaxLookAhead - Indicate the number of cycles in the scoreboard state.
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
Definition: SmallVector.h:1200
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18