llvm-project/llvm/lib/Target/AArch64/AArch64Subtarget.h

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9.2 KiB
C++

//===--- AArch64Subtarget.h - Define Subtarget for the AArch64 -*- C++ -*--===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the AArch64 specific subclass of TargetSubtarget.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_AARCH64_AARCH64SUBTARGET_H
#define LLVM_LIB_TARGET_AARCH64_AARCH64SUBTARGET_H
#include "AArch64FrameLowering.h"
#include "AArch64ISelLowering.h"
#include "AArch64InstrInfo.h"
#include "AArch64RegisterInfo.h"
#include "AArch64SelectionDAGInfo.h"
#include "llvm/CodeGen/GlobalISel/GISelAccessor.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/Target/TargetSubtargetInfo.h"
#include <string>
#define GET_SUBTARGETINFO_HEADER
#include "AArch64GenSubtargetInfo.inc"
namespace llvm {
class GlobalValue;
class StringRef;
class Triple;
class AArch64Subtarget final : public AArch64GenSubtargetInfo {
public:
enum ARMProcFamilyEnum : uint8_t {
Others,
CortexA35,
CortexA53,
CortexA57,
CortexA72,
CortexA73,
Cyclone,
ExynosM1,
Kryo,
Vulcan
};
protected:
/// ARMProcFamily - ARM processor family: Cortex-A53, Cortex-A57, and others.
ARMProcFamilyEnum ARMProcFamily = Others;
bool HasV8_1aOps = false;
bool HasV8_2aOps = false;
bool HasFPARMv8 = false;
bool HasNEON = false;
bool HasCrypto = false;
bool HasCRC = false;
bool HasRAS = false;
bool HasPerfMon = false;
bool HasFullFP16 = false;
bool HasSPE = false;
// HasZeroCycleRegMove - Has zero-cycle register mov instructions.
bool HasZeroCycleRegMove = false;
// HasZeroCycleZeroing - Has zero-cycle zeroing instructions.
bool HasZeroCycleZeroing = false;
// StrictAlign - Disallow unaligned memory accesses.
bool StrictAlign = false;
bool MergeNarrowLoads = false;
bool UseAA = false;
bool PredictableSelectIsExpensive = false;
bool BalanceFPOps = false;
bool CustomAsCheapAsMove = false;
bool UsePostRAScheduler = false;
bool Misaligned128StoreIsSlow = false;
bool AvoidQuadLdStPairs = false;
bool UseAlternateSExtLoadCVTF32Pattern = false;
bool HasMacroOpFusion = false;
bool DisableLatencySchedHeuristic = false;
bool UseRSqrt = false;
uint8_t MaxInterleaveFactor = 2;
uint8_t VectorInsertExtractBaseCost = 3;
uint16_t CacheLineSize = 0;
uint16_t PrefetchDistance = 0;
uint16_t MinPrefetchStride = 1;
unsigned MaxPrefetchIterationsAhead = UINT_MAX;
unsigned PrefFunctionAlignment = 0;
unsigned PrefLoopAlignment = 0;
// ReserveX18 - X18 is not available as a general purpose register.
bool ReserveX18;
bool IsLittle;
/// CPUString - String name of used CPU.
std::string CPUString;
/// TargetTriple - What processor and OS we're targeting.
Triple TargetTriple;
AArch64FrameLowering FrameLowering;
AArch64InstrInfo InstrInfo;
AArch64SelectionDAGInfo TSInfo;
AArch64TargetLowering TLInfo;
/// Gather the accessor points to GlobalISel-related APIs.
/// This is used to avoid ifndefs spreading around while GISel is
/// an optional library.
std::unique_ptr<GISelAccessor> GISel;
private:
/// initializeSubtargetDependencies - Initializes using CPUString and the
/// passed in feature string so that we can use initializer lists for
/// subtarget initialization.
AArch64Subtarget &initializeSubtargetDependencies(StringRef FS);
/// Initialize properties based on the selected processor family.
void initializeProperties();
public:
/// This constructor initializes the data members to match that
/// of the specified triple.
AArch64Subtarget(const Triple &TT, const std::string &CPU,
const std::string &FS, const TargetMachine &TM,
bool LittleEndian);
/// This object will take onwership of \p GISelAccessor.
void setGISelAccessor(GISelAccessor &GISel) {
this->GISel.reset(&GISel);
}
const AArch64SelectionDAGInfo *getSelectionDAGInfo() const override {
return &TSInfo;
}
const AArch64FrameLowering *getFrameLowering() const override {
return &FrameLowering;
}
const AArch64TargetLowering *getTargetLowering() const override {
return &TLInfo;
}
const AArch64InstrInfo *getInstrInfo() const override { return &InstrInfo; }
const AArch64RegisterInfo *getRegisterInfo() const override {
return &getInstrInfo()->getRegisterInfo();
}
const CallLowering *getCallLowering() const override;
const InstructionSelector *getInstructionSelector() const override;
const MachineLegalizer *getMachineLegalizer() const override;
const RegisterBankInfo *getRegBankInfo() const override;
const Triple &getTargetTriple() const { return TargetTriple; }
bool enableMachineScheduler() const override { return true; }
bool enablePostRAScheduler() const override {
return UsePostRAScheduler;
}
/// Returns ARM processor family.
/// Avoid this function! CPU specifics should be kept local to this class
/// and preferably modeled with SubtargetFeatures or properties in
/// initializeProperties().
ARMProcFamilyEnum getProcFamily() const {
return ARMProcFamily;
}
bool hasV8_1aOps() const { return HasV8_1aOps; }
bool hasV8_2aOps() const { return HasV8_2aOps; }
bool hasZeroCycleRegMove() const { return HasZeroCycleRegMove; }
bool hasZeroCycleZeroing() const { return HasZeroCycleZeroing; }
bool requiresStrictAlign() const { return StrictAlign; }
bool isX18Reserved() const { return ReserveX18; }
bool hasFPARMv8() const { return HasFPARMv8; }
bool hasNEON() const { return HasNEON; }
bool hasCrypto() const { return HasCrypto; }
bool hasCRC() const { return HasCRC; }
bool hasRAS() const { return HasRAS; }
bool mergeNarrowLoads() const { return MergeNarrowLoads; }
bool balanceFPOps() const { return BalanceFPOps; }
bool predictableSelectIsExpensive() const {
return PredictableSelectIsExpensive;
}
bool hasCustomCheapAsMoveHandling() const { return CustomAsCheapAsMove; }
bool isMisaligned128StoreSlow() const { return Misaligned128StoreIsSlow; }
bool avoidQuadLdStPairs() const { return AvoidQuadLdStPairs; }
bool useAlternateSExtLoadCVTF32Pattern() const {
return UseAlternateSExtLoadCVTF32Pattern;
}
bool hasMacroOpFusion() const { return HasMacroOpFusion; }
bool useRSqrt() const { return UseRSqrt; }
unsigned getMaxInterleaveFactor() const { return MaxInterleaveFactor; }
unsigned getVectorInsertExtractBaseCost() const {
return VectorInsertExtractBaseCost;
}
unsigned getCacheLineSize() const { return CacheLineSize; }
unsigned getPrefetchDistance() const { return PrefetchDistance; }
unsigned getMinPrefetchStride() const { return MinPrefetchStride; }
unsigned getMaxPrefetchIterationsAhead() const {
return MaxPrefetchIterationsAhead;
}
unsigned getPrefFunctionAlignment() const { return PrefFunctionAlignment; }
unsigned getPrefLoopAlignment() const { return PrefLoopAlignment; }
/// CPU has TBI (top byte of addresses is ignored during HW address
/// translation) and OS enables it.
bool supportsAddressTopByteIgnored() const;
bool hasPerfMon() const { return HasPerfMon; }
bool hasFullFP16() const { return HasFullFP16; }
bool hasSPE() const { return HasSPE; }
bool isLittleEndian() const { return IsLittle; }
bool isTargetDarwin() const { return TargetTriple.isOSDarwin(); }
bool isTargetIOS() const { return TargetTriple.isiOS(); }
bool isTargetLinux() const { return TargetTriple.isOSLinux(); }
bool isTargetWindows() const { return TargetTriple.isOSWindows(); }
bool isTargetAndroid() const { return TargetTriple.isAndroid(); }
bool isTargetCOFF() const { return TargetTriple.isOSBinFormatCOFF(); }
bool isTargetELF() const { return TargetTriple.isOSBinFormatELF(); }
bool isTargetMachO() const { return TargetTriple.isOSBinFormatMachO(); }
bool useAA() const override { return UseAA; }
/// getMaxInlineSizeThreshold - Returns the maximum memset / memcpy size
/// that still makes it profitable to inline the call.
unsigned getMaxInlineSizeThreshold() const { return 64; }
/// ParseSubtargetFeatures - Parses features string setting specified
/// subtarget options. Definition of function is auto generated by tblgen.
void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
/// ClassifyGlobalReference - Find the target operand flags that describe
/// how a global value should be referenced for the current subtarget.
unsigned char ClassifyGlobalReference(const GlobalValue *GV,
const TargetMachine &TM) const;
/// This function returns the name of a function which has an interface
/// like the non-standard bzero function, if such a function exists on
/// the current subtarget and it is considered prefereable over
/// memset with zero passed as the second argument. Otherwise it
/// returns null.
const char *getBZeroEntry() const;
void overrideSchedPolicy(MachineSchedPolicy &Policy,
unsigned NumRegionInstrs) const override;
bool enableEarlyIfConversion() const override;
std::unique_ptr<PBQPRAConstraint> getCustomPBQPConstraints() const override;
};
} // End llvm namespace
#endif