| 1 | //===- HexagonSubtarget.h - Define Subtarget for the Hexagon ----*- 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 declares the Hexagon specific subclass of TargetSubtarget. |
| 10 | // |
| 11 | //===----------------------------------------------------------------------===// |
| 12 | |
| 13 | #ifndef LLVM_LIB_TARGET_HEXAGON_HEXAGONSUBTARGET_H |
| 14 | #define LLVM_LIB_TARGET_HEXAGON_HEXAGONSUBTARGET_H |
| 15 | |
| 16 | #include "HexagonDepArch.h" |
| 17 | #include "HexagonFrameLowering.h" |
| 18 | #include "HexagonISelLowering.h" |
| 19 | #include "HexagonInstrInfo.h" |
| 20 | #include "HexagonRegisterInfo.h" |
| 21 | #include "HexagonSelectionDAGInfo.h" |
| 22 | #include "llvm/ADT/SmallSet.h" |
| 23 | #include "llvm/ADT/StringRef.h" |
| 24 | #include "llvm/CodeGen/ScheduleDAGMutation.h" |
| 25 | #include "llvm/CodeGen/TargetSubtargetInfo.h" |
| 26 | #include "llvm/MC/MCInstrItineraries.h" |
| 27 | #include "llvm/Support/Alignment.h" |
| 28 | #include <memory> |
| 29 | #include <string> |
| 30 | #include <vector> |
| 31 | |
| 32 | #define |
| 33 | #include "HexagonGenSubtargetInfo.inc" |
| 34 | |
| 35 | namespace llvm { |
| 36 | |
| 37 | class MachineInstr; |
| 38 | class SDep; |
| 39 | class SUnit; |
| 40 | class TargetMachine; |
| 41 | class Triple; |
| 42 | |
| 43 | class HexagonSubtarget : public HexagonGenSubtargetInfo { |
| 44 | virtual void anchor(); |
| 45 | |
| 46 | bool UseHVX64BOps = false; |
| 47 | bool UseHVX128BOps = false; |
| 48 | |
| 49 | bool UseAudioOps = false; |
| 50 | bool UseCompound = false; |
| 51 | bool UseLongCalls = false; |
| 52 | bool UseMemops = false; |
| 53 | bool UsePackets = false; |
| 54 | bool UseNewValueJumps = false; |
| 55 | bool UseNewValueStores = false; |
| 56 | bool UseSmallData = false; |
| 57 | bool UseZRegOps = false; |
| 58 | bool UseHVXIEEEFPOps = false; |
| 59 | bool UseHVXQFloatOps = false; |
| 60 | bool UseHVXFloatingPoint = false; |
| 61 | bool UseCabac = false; |
| 62 | |
| 63 | bool HasPreV65 = false; |
| 64 | bool HasMemNoShuf = false; |
| 65 | bool EnableDuplex = false; |
| 66 | bool ReservedR19 = false; |
| 67 | bool NoreturnStackElim = false; |
| 68 | |
| 69 | public: |
| 70 | Hexagon::ArchEnum HexagonArchVersion; |
| 71 | Hexagon::ArchEnum HexagonHVXVersion = Hexagon::ArchEnum::NoArch; |
| 72 | CodeGenOptLevel OptLevel; |
| 73 | /// True if the target should use Back-Skip-Back scheduling. This is the |
| 74 | /// default for V60. |
| 75 | bool UseBSBScheduling; |
| 76 | |
| 77 | struct UsrOverflowMutation : public ScheduleDAGMutation { |
| 78 | void apply(ScheduleDAGInstrs *DAG) override; |
| 79 | }; |
| 80 | struct HVXMemLatencyMutation : public ScheduleDAGMutation { |
| 81 | void apply(ScheduleDAGInstrs *DAG) override; |
| 82 | }; |
| 83 | struct CallMutation : public ScheduleDAGMutation { |
| 84 | void apply(ScheduleDAGInstrs *DAG) override; |
| 85 | private: |
| 86 | bool shouldTFRICallBind(const HexagonInstrInfo &HII, |
| 87 | const SUnit &Inst1, const SUnit &Inst2) const; |
| 88 | }; |
| 89 | struct BankConflictMutation : public ScheduleDAGMutation { |
| 90 | void apply(ScheduleDAGInstrs *DAG) override; |
| 91 | }; |
| 92 | |
| 93 | private: |
| 94 | enum HexagonProcFamilyEnum { Others, TinyCore }; |
| 95 | |
| 96 | std::string CPUString; |
| 97 | HexagonProcFamilyEnum HexagonProcFamily = Others; |
| 98 | Triple TargetTriple; |
| 99 | |
| 100 | // The following objects can use the TargetTriple, so they must be |
| 101 | // declared after it. |
| 102 | HexagonInstrInfo InstrInfo; |
| 103 | HexagonTargetLowering TLInfo; |
| 104 | HexagonSelectionDAGInfo TSInfo; |
| 105 | HexagonFrameLowering FrameLowering; |
| 106 | InstrItineraryData InstrItins; |
| 107 | |
| 108 | public: |
| 109 | HexagonSubtarget(const Triple &TT, StringRef CPU, StringRef FS, |
| 110 | const TargetMachine &TM); |
| 111 | |
| 112 | const Triple &getTargetTriple() const { return TargetTriple; } |
| 113 | bool isEnvironmentMusl() const { |
| 114 | return TargetTriple.getEnvironment() == Triple::Musl; |
| 115 | } |
| 116 | |
| 117 | /// getInstrItins - Return the instruction itineraries based on subtarget |
| 118 | /// selection. |
| 119 | const InstrItineraryData *getInstrItineraryData() const override { |
| 120 | return &InstrItins; |
| 121 | } |
| 122 | const HexagonInstrInfo *getInstrInfo() const override { return &InstrInfo; } |
| 123 | const HexagonRegisterInfo *getRegisterInfo() const override { |
| 124 | return &InstrInfo.getRegisterInfo(); |
| 125 | } |
| 126 | const HexagonTargetLowering *getTargetLowering() const override { |
| 127 | return &TLInfo; |
| 128 | } |
| 129 | const HexagonFrameLowering *getFrameLowering() const override { |
| 130 | return &FrameLowering; |
| 131 | } |
| 132 | const HexagonSelectionDAGInfo *getSelectionDAGInfo() const override { |
| 133 | return &TSInfo; |
| 134 | } |
| 135 | |
| 136 | HexagonSubtarget &initializeSubtargetDependencies(StringRef CPU, |
| 137 | StringRef FS); |
| 138 | |
| 139 | /// ParseSubtargetFeatures - Parses features string setting specified |
| 140 | /// subtarget options. Definition of function is auto generated by tblgen. |
| 141 | void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS); |
| 142 | |
| 143 | bool isXRaySupported() const override { return true; } |
| 144 | |
| 145 | bool hasV5Ops() const { |
| 146 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V5; |
| 147 | } |
| 148 | bool hasV5OpsOnly() const { |
| 149 | return getHexagonArchVersion() == Hexagon::ArchEnum::V5; |
| 150 | } |
| 151 | bool hasV55Ops() const { |
| 152 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V55; |
| 153 | } |
| 154 | bool hasV55OpsOnly() const { |
| 155 | return getHexagonArchVersion() == Hexagon::ArchEnum::V55; |
| 156 | } |
| 157 | bool hasV60Ops() const { |
| 158 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V60; |
| 159 | } |
| 160 | bool hasV60OpsOnly() const { |
| 161 | return getHexagonArchVersion() == Hexagon::ArchEnum::V60; |
| 162 | } |
| 163 | bool hasV62Ops() const { |
| 164 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V62; |
| 165 | } |
| 166 | bool hasV62OpsOnly() const { |
| 167 | return getHexagonArchVersion() == Hexagon::ArchEnum::V62; |
| 168 | } |
| 169 | bool hasV65Ops() const { |
| 170 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V65; |
| 171 | } |
| 172 | bool hasV65OpsOnly() const { |
| 173 | return getHexagonArchVersion() == Hexagon::ArchEnum::V65; |
| 174 | } |
| 175 | bool hasV66Ops() const { |
| 176 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V66; |
| 177 | } |
| 178 | bool hasV66OpsOnly() const { |
| 179 | return getHexagonArchVersion() == Hexagon::ArchEnum::V66; |
| 180 | } |
| 181 | bool hasV67Ops() const { |
| 182 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V67; |
| 183 | } |
| 184 | bool hasV67OpsOnly() const { |
| 185 | return getHexagonArchVersion() == Hexagon::ArchEnum::V67; |
| 186 | } |
| 187 | bool hasV68Ops() const { |
| 188 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V68; |
| 189 | } |
| 190 | bool hasV68OpsOnly() const { |
| 191 | return getHexagonArchVersion() == Hexagon::ArchEnum::V68; |
| 192 | } |
| 193 | bool hasV69Ops() const { |
| 194 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V69; |
| 195 | } |
| 196 | bool hasV69OpsOnly() const { |
| 197 | return getHexagonArchVersion() == Hexagon::ArchEnum::V69; |
| 198 | } |
| 199 | bool hasV71Ops() const { |
| 200 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V71; |
| 201 | } |
| 202 | bool hasV71OpsOnly() const { |
| 203 | return getHexagonArchVersion() == Hexagon::ArchEnum::V71; |
| 204 | } |
| 205 | bool hasV73Ops() const { |
| 206 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V73; |
| 207 | } |
| 208 | bool hasV73OpsOnly() const { |
| 209 | return getHexagonArchVersion() == Hexagon::ArchEnum::V73; |
| 210 | } |
| 211 | bool hasV75Ops() const { |
| 212 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V75; |
| 213 | } |
| 214 | bool hasV75OpsOnly() const { |
| 215 | return getHexagonArchVersion() == Hexagon::ArchEnum::V75; |
| 216 | } |
| 217 | bool hasV79Ops() const { |
| 218 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V79; |
| 219 | } |
| 220 | bool hasV79OpsOnly() const { |
| 221 | return getHexagonArchVersion() == Hexagon::ArchEnum::V79; |
| 222 | } |
| 223 | bool useHVXV79Ops() const { |
| 224 | return HexagonHVXVersion >= Hexagon::ArchEnum::V79; |
| 225 | } |
| 226 | bool hasV81Ops() const { |
| 227 | return getHexagonArchVersion() >= Hexagon::ArchEnum::V81; |
| 228 | } |
| 229 | bool hasV81OpsOnly() const { |
| 230 | return getHexagonArchVersion() == Hexagon::ArchEnum::V81; |
| 231 | } |
| 232 | bool useHVXV81Ops() const { |
| 233 | return HexagonHVXVersion >= Hexagon::ArchEnum::V81; |
| 234 | } |
| 235 | |
| 236 | bool useAudioOps() const { return UseAudioOps; } |
| 237 | bool useCompound() const { return UseCompound; } |
| 238 | bool useLongCalls() const { return UseLongCalls; } |
| 239 | bool useMemops() const { return UseMemops; } |
| 240 | bool usePackets() const { return UsePackets; } |
| 241 | bool useNewValueJumps() const { return UseNewValueJumps; } |
| 242 | bool useNewValueStores() const { return UseNewValueStores; } |
| 243 | bool useSmallData() const { return UseSmallData; } |
| 244 | bool useZRegOps() const { return UseZRegOps; } |
| 245 | bool useCabac() const { return UseCabac; } |
| 246 | |
| 247 | bool isTinyCore() const { return HexagonProcFamily == TinyCore; } |
| 248 | bool isTinyCoreWithDuplex() const { return isTinyCore() && EnableDuplex; } |
| 249 | |
| 250 | bool useHVXIEEEFPOps() const { return UseHVXIEEEFPOps && useHVXOps(); } |
| 251 | bool useHVXQFloatOps() const { |
| 252 | return UseHVXQFloatOps && HexagonHVXVersion >= Hexagon::ArchEnum::V68; |
| 253 | } |
| 254 | bool useHVXFloatingPoint() const { return UseHVXFloatingPoint; } |
| 255 | bool useHVXOps() const { |
| 256 | return HexagonHVXVersion > Hexagon::ArchEnum::NoArch; |
| 257 | } |
| 258 | bool useHVXV60Ops() const { |
| 259 | return HexagonHVXVersion >= Hexagon::ArchEnum::V60; |
| 260 | } |
| 261 | bool useHVXV62Ops() const { |
| 262 | return HexagonHVXVersion >= Hexagon::ArchEnum::V62; |
| 263 | } |
| 264 | bool useHVXV65Ops() const { |
| 265 | return HexagonHVXVersion >= Hexagon::ArchEnum::V65; |
| 266 | } |
| 267 | bool useHVXV66Ops() const { |
| 268 | return HexagonHVXVersion >= Hexagon::ArchEnum::V66; |
| 269 | } |
| 270 | bool useHVXV67Ops() const { |
| 271 | return HexagonHVXVersion >= Hexagon::ArchEnum::V67; |
| 272 | } |
| 273 | bool useHVXV68Ops() const { |
| 274 | return HexagonHVXVersion >= Hexagon::ArchEnum::V68; |
| 275 | } |
| 276 | bool useHVXV69Ops() const { |
| 277 | return HexagonHVXVersion >= Hexagon::ArchEnum::V69; |
| 278 | } |
| 279 | bool useHVXV71Ops() const { |
| 280 | return HexagonHVXVersion >= Hexagon::ArchEnum::V71; |
| 281 | } |
| 282 | bool useHVXV73Ops() const { |
| 283 | return HexagonHVXVersion >= Hexagon::ArchEnum::V73; |
| 284 | } |
| 285 | bool useHVX128BOps() const { return useHVXOps() && UseHVX128BOps; } |
| 286 | bool useHVX64BOps() const { return useHVXOps() && UseHVX64BOps; } |
| 287 | |
| 288 | bool hasMemNoShuf() const { return HasMemNoShuf; } |
| 289 | bool hasReservedR19() const { return ReservedR19; } |
| 290 | bool usePredicatedCalls() const; |
| 291 | |
| 292 | bool noreturnStackElim() const { return NoreturnStackElim; } |
| 293 | |
| 294 | bool useBSBScheduling() const { return UseBSBScheduling; } |
| 295 | bool enableMachineScheduler() const override; |
| 296 | |
| 297 | // Always use the TargetLowering default scheduler. |
| 298 | // FIXME: This will use the vliw scheduler which is probably just hurting |
| 299 | // compiler time and will be removed eventually anyway. |
| 300 | bool enableMachineSchedDefaultSched() const override { return false; } |
| 301 | |
| 302 | // For use with PostRAScheduling: get the anti-dependence breaking that should |
| 303 | // be performed before post-RA scheduling. |
| 304 | AntiDepBreakMode getAntiDepBreakMode() const override { return ANTIDEP_ALL; } |
| 305 | /// True if the subtarget should run a scheduler after register |
| 306 | /// allocation. |
| 307 | bool enablePostRAScheduler() const override { return true; } |
| 308 | |
| 309 | bool enableSubRegLiveness() const override; |
| 310 | |
| 311 | const std::string &getCPUString () const { return CPUString; } |
| 312 | |
| 313 | const Hexagon::ArchEnum &getHexagonArchVersion() const { |
| 314 | return HexagonArchVersion; |
| 315 | } |
| 316 | |
| 317 | void getPostRAMutations( |
| 318 | std::vector<std::unique_ptr<ScheduleDAGMutation>> &Mutations) |
| 319 | const override; |
| 320 | |
| 321 | void getSMSMutations( |
| 322 | std::vector<std::unique_ptr<ScheduleDAGMutation>> &Mutations) |
| 323 | const override; |
| 324 | |
| 325 | /// Enable use of alias analysis during code generation (during MI |
| 326 | /// scheduling, DAGCombine, etc.). |
| 327 | bool useAA() const override; |
| 328 | |
| 329 | /// Perform target specific adjustments to the latency of a schedule |
| 330 | /// dependency. |
| 331 | void adjustSchedDependency(SUnit *Def, int DefOpIdx, SUnit *Use, int UseOpIdx, |
| 332 | SDep &Dep, |
| 333 | const TargetSchedModel *SchedModel) const override; |
| 334 | |
| 335 | unsigned getVectorLength() const { |
| 336 | assert(useHVXOps()); |
| 337 | if (useHVX64BOps()) |
| 338 | return 64; |
| 339 | if (useHVX128BOps()) |
| 340 | return 128; |
| 341 | llvm_unreachable("Invalid HVX vector length settings" ); |
| 342 | } |
| 343 | |
| 344 | ArrayRef<MVT> getHVXElementTypes() const { |
| 345 | static MVT Types[] = {MVT::i8, MVT::i16, MVT::i32}; |
| 346 | static MVT TypesV68[] = {MVT::i8, MVT::i16, MVT::i32, MVT::f16, MVT::f32}; |
| 347 | static MVT TypesV81[] = {MVT::i8, MVT::i16, MVT::i32, |
| 348 | MVT::f16, MVT::bf16, MVT::f32}; |
| 349 | |
| 350 | if (useHVXV81Ops() && useHVXFloatingPoint()) |
| 351 | return ArrayRef(TypesV81); |
| 352 | if (useHVXV68Ops() && useHVXFloatingPoint()) |
| 353 | return ArrayRef(TypesV68); |
| 354 | return ArrayRef(Types); |
| 355 | } |
| 356 | |
| 357 | bool isHVXElementType(MVT Ty, bool IncludeBool = false) const; |
| 358 | bool isHVXVectorType(EVT VecTy, bool IncludeBool = false) const; |
| 359 | bool isTypeForHVX(Type *VecTy, bool IncludeBool = false) const; |
| 360 | |
| 361 | Align getTypeAlignment(MVT Ty) const { |
| 362 | if (isHVXVectorType(VecTy: Ty, IncludeBool: true)) |
| 363 | return Align(getVectorLength()); |
| 364 | return Align(std::max<unsigned>(a: 1, b: Ty.getSizeInBits() / 8)); |
| 365 | } |
| 366 | |
| 367 | unsigned getL1CacheLineSize() const; |
| 368 | unsigned getL1PrefetchDistance() const; |
| 369 | |
| 370 | Intrinsic::ID getIntrinsicId(unsigned Opc) const; |
| 371 | |
| 372 | private: |
| 373 | // Helper function responsible for increasing the latency only. |
| 374 | int updateLatency(MachineInstr &SrcInst, MachineInstr &DstInst, |
| 375 | bool IsArtificial, int Latency) const; |
| 376 | void restoreLatency(SUnit *Src, SUnit *Dst) const; |
| 377 | void changeLatency(SUnit *Src, SUnit *Dst, unsigned Lat) const; |
| 378 | bool isBestZeroLatency(SUnit *Src, SUnit *Dst, const HexagonInstrInfo *TII, |
| 379 | SmallPtrSet<SUnit *, 4> &ExclSrc, |
| 380 | SmallPtrSet<SUnit *, 4> &ExclDst) const; |
| 381 | }; |
| 382 | |
| 383 | } // end namespace llvm |
| 384 | |
| 385 | #endif // LLVM_LIB_TARGET_HEXAGON_HEXAGONSUBTARGET_H |
| 386 | |