X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FARM%2FARMSubtarget.h;h=f79b69199fb119e36086e8eda0b25d86ecfcbe45;hb=77327b8520d8d0b69f45a812c7d354bbead6c1c1;hp=0271c873f191a92942c00925f408e9230d3b8689;hpb=0b65599015f0b51304d941ba4a14aaf0d1734341;p=oota-llvm.git diff --git a/lib/Target/ARM/ARMSubtarget.h b/lib/Target/ARM/ARMSubtarget.h index 0271c873f19..f79b69199fb 100644 --- a/lib/Target/ARM/ARMSubtarget.h +++ b/lib/Target/ARM/ARMSubtarget.h @@ -1,4 +1,4 @@ -//=====---- ARMSubtarget.h - Define Subtarget for the ARM -----*- C++ -*--====// +//===-- ARMSubtarget.h - Define Subtarget for the ARM ----------*- C++ -*--===// // // The LLVM Compiler Infrastructure // @@ -7,56 +7,84 @@ // //===----------------------------------------------------------------------===// // -// This file declares the ARM specific subclass of TargetSubtarget. +// This file declares the ARM specific subclass of TargetSubtargetInfo. // //===----------------------------------------------------------------------===// #ifndef ARMSUBTARGET_H #define ARMSUBTARGET_H -#include "llvm/Target/TargetInstrItineraries.h" -#include "llvm/Target/TargetMachine.h" -#include "llvm/Target/TargetSubtarget.h" + +#include "ARMFrameLowering.h" +#include "ARMISelLowering.h" +#include "ARMInstrInfo.h" +#include "ARMJITInfo.h" +#include "ARMSelectionDAGInfo.h" +#include "ARMSubtarget.h" +#include "Thumb1FrameLowering.h" +#include "Thumb1InstrInfo.h" +#include "Thumb2InstrInfo.h" +#include "ARMJITInfo.h" +#include "MCTargetDesc/ARMMCTargetDesc.h" #include "llvm/ADT/Triple.h" +#include "llvm/IR/DataLayout.h" +#include "llvm/MC/MCInstrItineraries.h" +#include "llvm/Target/TargetSubtargetInfo.h" #include +#define GET_SUBTARGETINFO_HEADER +#include "ARMGenSubtargetInfo.inc" + namespace llvm { class GlobalValue; +class StringRef; +class TargetOptions; -class ARMSubtarget : public TargetSubtarget { +class ARMSubtarget : public ARMGenSubtargetInfo { protected: - enum ARMArchEnum { - V4, V4T, V5T, V5TE, V6, V6M, V6T2, V7A, V7M - }; - enum ARMProcFamilyEnum { - Others, CortexA8, CortexA9 + Others, CortexA5, CortexA7, CortexA8, CortexA9, CortexA12, CortexA15, + CortexR5, Swift, CortexA53, CortexA57, Krait }; - - enum ARMFPEnum { - None, VFPv2, VFPv3, NEON - }; - - enum ThumbTypeEnum { - Thumb1, - Thumb2 + enum ARMProcClassEnum { + None, AClass, RClass, MClass }; - /// ARMArchVersion - ARM architecture version: V4, V4T (base), V5T, V5TE, - /// V6, V6T2, V7A, V7M. - ARMArchEnum ARMArchVersion; - /// ARMProcFamily - ARM processor family: Cortex-A8, Cortex-A9, and others. ARMProcFamilyEnum ARMProcFamily; - /// ARMFPUType - Floating Point Unit type. - ARMFPEnum ARMFPUType; + /// ARMProcClass - ARM processor class: None, AClass, RClass or MClass. + ARMProcClassEnum ARMProcClass; + + /// HasV4TOps, HasV5TOps, HasV5TEOps, + /// HasV6Ops, HasV6MOps, HasV6T2Ops, HasV7Ops, HasV8Ops - + /// Specify whether target support specific ARM ISA variants. + bool HasV4TOps; + bool HasV5TOps; + bool HasV5TEOps; + bool HasV6Ops; + bool HasV6MOps; + bool HasV6T2Ops; + bool HasV7Ops; + bool HasV8Ops; + + /// HasVFPv2, HasVFPv3, HasVFPv4, HasFPARMv8, HasNEON - Specify what + /// floating point ISAs are supported. + bool HasVFPv2; + bool HasVFPv3; + bool HasVFPv4; + bool HasFPARMv8; + bool HasNEON; /// UseNEONForSinglePrecisionFP - if the NEONFP attribute has been /// specified. Use the method useNEONForSinglePrecisionFP() to /// determine if NEON should actually be used. bool UseNEONForSinglePrecisionFP; + /// UseMulOps - True if non-microcoded fused integer multiply-add and + /// multiply-subtract instructions should be used. + bool UseMulOps; + /// SlowFPVMLx - If the VFP2 / NEON instructions are available, indicates /// whether the FP VML[AS] instructions are slow (if so, don't use them). bool SlowFPVMLx; @@ -68,18 +96,15 @@ protected: /// SlowFPBrcc - True if floating point compare + branch is slow. bool SlowFPBrcc; - /// IsThumb - True if we are in thumb mode, false if in ARM mode. - bool IsThumb; + /// InThumbMode - True if compiling for Thumb, false for ARM. + bool InThumbMode; - /// ThumbMode - Indicates supported Thumb version. - ThumbTypeEnum ThumbMode; + /// HasThumb2 - True if Thumb2 instructions are supported. + bool HasThumb2; /// NoARM - True if subtarget does not support ARM mode execution. bool NoARM; - /// PostRAScheduler - True if using post-register-allocation scheduler. - bool PostRAScheduler; - /// IsR9Reserved - True if R9 is a not available as general purpose register. bool IsR9Reserved; @@ -87,6 +112,11 @@ protected: /// imms (including global addresses). bool UseMovt; + /// SupportsTailCall - True if the OS supports tail call. The dynamic linker + /// must be able to synthesize call stubs for interworking between ARM and + /// Thumb. + bool SupportsTailCall; + /// HasFP16 - True if subtarget supports half-precision FP (We support VFP+HF /// only so far) bool HasFP16; @@ -98,6 +128,9 @@ protected: /// HasHardwareDivide - True if subtarget supports [su]div bool HasHardwareDivide; + /// HasHardwareDivideInARM - True if subtarget supports [su]div in ARM mode + bool HasHardwareDivideInARM; + /// HasT2ExtractPack - True if subtarget supports thumb2 extract/pack /// instructions. bool HasT2ExtractPack; @@ -115,19 +148,63 @@ protected: /// CPSR setting instruction. bool AvoidCPSRPartialUpdate; + /// AvoidMOVsShifterOperand - If true, codegen should avoid using flag setting + /// movs with shifter operand (i.e. asr, lsl, lsr). + bool AvoidMOVsShifterOperand; + + /// HasRAS - Some processors perform return stack prediction. CodeGen should + /// avoid issue "normal" call instructions to callees which do not return. + bool HasRAS; + /// HasMPExtension - True if the subtarget supports Multiprocessing /// extension (ARMv7 only). bool HasMPExtension; + /// HasVirtualization - True if the subtarget supports the Virtualization + /// extension. + bool HasVirtualization; + /// FPOnlySP - If true, the floating point unit only supports single /// precision. bool FPOnlySP; + /// If true, the processor supports the Performance Monitor Extensions. These + /// include a generic cycle-counter as well as more fine-grained (often + /// implementation-specific) events. + bool HasPerfMon; + + /// HasTrustZone - if true, processor supports TrustZone security extensions + bool HasTrustZone; + + /// HasCrypto - if true, processor supports Cryptography extensions + bool HasCrypto; + + /// HasCRC - if true, processor supports CRC instructions + bool HasCRC; + + /// If true, the instructions "vmov.i32 d0, #0" and "vmov.i32 q0, #0" are + /// particularly effective at zeroing a VFP register. + bool HasZeroCycleZeroing; + /// AllowsUnalignedMem - If true, the subtarget allows unaligned memory /// accesses for some types. For details, see - /// ARMTargetLowering::allowsUnalignedMemoryAccesses(). + /// ARMTargetLowering::allowsMisalignedMemoryAccesses(). bool AllowsUnalignedMem; + /// RestrictIT - If true, the subtarget disallows generation of deprecated IT + /// blocks to conform to ARMv8 rule. + bool RestrictIT; + + /// Thumb2DSP - If true, the subtarget supports the v7 DSP (saturating arith + /// and such) instructions in Thumb2 code. + bool Thumb2DSP; + + /// NaCl TRAP instruction is generated instead of the regular TRAP. + bool UseNaClTrap; + + /// Target machine allowed unsafe FP math (such as use of NEON fp) + bool UnsafeFPMath; + /// stackAlignment - The minimum alignment known to hold of the stack frame on /// entry to the function and which must be maintained by every function. unsigned stackAlignment; @@ -135,18 +212,24 @@ protected: /// CPUString - String name of used CPU. std::string CPUString; + /// IsLittle - The target is Little Endian + bool IsLittle; + /// TargetTriple - What processor and OS we're targeting. Triple TargetTriple; + /// SchedModel - Processor specific instruction costs. + const MCSchedModel *SchedModel; + /// Selected instruction itineraries (one entry per itinerary class.) InstrItineraryData InstrItins; - public: - enum { - isELF, isDarwin - } TargetType; + /// Options passed via command line that could influence the target + const TargetOptions &Options; + public: enum { + ARM_ABI_UNKNOWN, ARM_ABI_APCS, ARM_ABI_AAPCS // ARM EABI } TargetABI; @@ -154,49 +237,114 @@ protected: /// This constructor initializes the data members to match that /// of the specified triple. /// - ARMSubtarget(const std::string &TT, const std::string &FS, bool isThumb); + ARMSubtarget(const std::string &TT, const std::string &CPU, + const std::string &FS, TargetMachine &TM, bool IsLittle, + const TargetOptions &Options); /// getMaxInlineSizeThreshold - Returns the maximum memset / memcpy size /// that still makes it profitable to inline the call. unsigned getMaxInlineSizeThreshold() const { - // FIXME: For now, we don't lower memcpy's to loads / stores for Thumb1. - // Change this once Thumb1 ldmia / stmia support is added. - return isThumb1Only() ? 0 : 64; + return 64; } /// ParseSubtargetFeatures - Parses features string setting specified /// subtarget options. Definition of function is auto generated by tblgen. - std::string ParseSubtargetFeatures(const std::string &FS, - const std::string &CPU); + void ParseSubtargetFeatures(StringRef CPU, StringRef FS); - void computeIssueWidth(); + /// \brief Reset the features for the ARM target. + void resetSubtargetFeatures(const MachineFunction *MF) override; + + /// initializeSubtargetDependencies - Initializes using a CPU and feature string + /// so that we can use initializer lists for subtarget initialization. + ARMSubtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS); + + const DataLayout *getDataLayout() const override { return &DL; } + const ARMSelectionDAGInfo *getSelectionDAGInfo() const override { + return &TSInfo; + } + ARMJITInfo *getJITInfo() override { return &JITInfo; } + const ARMBaseInstrInfo *getInstrInfo() const override { + return InstrInfo.get(); + } + const ARMTargetLowering *getTargetLowering() const override { + return &TLInfo; + } + const ARMFrameLowering *getFrameLowering() const override { + return FrameLowering.get(); + } + const ARMBaseRegisterInfo *getRegisterInfo() const override { + return &InstrInfo->getRegisterInfo(); + } - bool hasV4TOps() const { return ARMArchVersion >= V4T; } - bool hasV5TOps() const { return ARMArchVersion >= V5T; } - bool hasV5TEOps() const { return ARMArchVersion >= V5TE; } - bool hasV6Ops() const { return ARMArchVersion >= V6; } - bool hasV6T2Ops() const { return ARMArchVersion >= V6T2; } - bool hasV7Ops() const { return ARMArchVersion >= V7A; } +private: + const DataLayout DL; + ARMSelectionDAGInfo TSInfo; + ARMJITInfo JITInfo; + // Either Thumb1InstrInfo or Thumb2InstrInfo. + std::unique_ptr InstrInfo; + ARMTargetLowering TLInfo; + // Either Thumb1FrameLowering or ARMFrameLowering. + std::unique_ptr FrameLowering; + + void initializeEnvironment(); + void resetSubtargetFeatures(StringRef CPU, StringRef FS); +public: + void computeIssueWidth(); + bool hasV4TOps() const { return HasV4TOps; } + bool hasV5TOps() const { return HasV5TOps; } + bool hasV5TEOps() const { return HasV5TEOps; } + bool hasV6Ops() const { return HasV6Ops; } + bool hasV6MOps() const { return HasV6MOps; } + bool hasV6T2Ops() const { return HasV6T2Ops; } + bool hasV7Ops() const { return HasV7Ops; } + bool hasV8Ops() const { return HasV8Ops; } + + bool isCortexA5() const { return ARMProcFamily == CortexA5; } + bool isCortexA7() const { return ARMProcFamily == CortexA7; } bool isCortexA8() const { return ARMProcFamily == CortexA8; } bool isCortexA9() const { return ARMProcFamily == CortexA9; } + bool isCortexA15() const { return ARMProcFamily == CortexA15; } + bool isSwift() const { return ARMProcFamily == Swift; } + bool isCortexM3() const { return CPUString == "cortex-m3"; } + bool isLikeA9() const { return isCortexA9() || isCortexA15() || isKrait(); } + bool isCortexR5() const { return ARMProcFamily == CortexR5; } + bool isKrait() const { return ARMProcFamily == Krait; } bool hasARMOps() const { return !NoARM; } - bool hasVFP2() const { return ARMFPUType >= VFPv2; } - bool hasVFP3() const { return ARMFPUType >= VFPv3; } - bool hasNEON() const { return ARMFPUType >= NEON; } + bool hasVFP2() const { return HasVFPv2; } + bool hasVFP3() const { return HasVFPv3; } + bool hasVFP4() const { return HasVFPv4; } + bool hasFPARMv8() const { return HasFPARMv8; } + bool hasNEON() const { return HasNEON; } + bool hasCrypto() const { return HasCrypto; } + bool hasCRC() const { return HasCRC; } + bool hasVirtualization() const { return HasVirtualization; } bool useNEONForSinglePrecisionFP() const { return hasNEON() && UseNEONForSinglePrecisionFP; } + bool hasDivide() const { return HasHardwareDivide; } + bool hasDivideInARMMode() const { return HasHardwareDivideInARM; } bool hasT2ExtractPack() const { return HasT2ExtractPack; } bool hasDataBarrier() const { return HasDataBarrier; } + bool hasAnyDataBarrier() const { + return HasDataBarrier || (hasV6Ops() && !isThumb()); + } + bool useMulOps() const { return UseMulOps; } bool useFPVMLx() const { return !SlowFPVMLx; } bool hasVMLxForwarding() const { return HasVMLxForwarding; } bool isFPBrccSlow() const { return SlowFPBrcc; } bool isFPOnlySP() const { return FPOnlySP; } + bool hasPerfMon() const { return HasPerfMon; } + bool hasTrustZone() const { return HasTrustZone; } + bool hasZeroCycleZeroing() const { return HasZeroCycleZeroing; } bool prefers32BitThumb() const { return Pref32BitThumb; } bool avoidCPSRPartialUpdate() const { return AvoidCPSRPartialUpdate; } + bool avoidMOVsShifterOperand() const { return AvoidMOVsShifterOperand; } + bool hasRAS() const { return HasRAS; } bool hasMPExtension() const { return HasMPExtension; } + bool hasThumb2DSP() const { return Thumb2DSP; } + bool useNaClTrap() const { return UseNaClTrap; } bool hasFP16() const { return HasFP16; } bool hasD16() const { return HasD16; } @@ -204,34 +352,98 @@ protected: const Triple &getTargetTriple() const { return TargetTriple; } bool isTargetDarwin() const { return TargetTriple.isOSDarwin(); } - bool isTargetELF() const { return !isTargetDarwin(); } + bool isTargetIOS() const { return TargetTriple.isiOS(); } + bool isTargetLinux() const { return TargetTriple.isOSLinux(); } + bool isTargetNaCl() const { return TargetTriple.isOSNaCl(); } + bool isTargetNetBSD() const { return TargetTriple.getOS() == Triple::NetBSD; } + bool isTargetWindows() const { return TargetTriple.isOSWindows(); } + + bool isTargetCOFF() const { return TargetTriple.isOSBinFormatCOFF(); } + bool isTargetELF() const { return TargetTriple.isOSBinFormatELF(); } + bool isTargetMachO() const { return TargetTriple.isOSBinFormatMachO(); } + + // ARM EABI is the bare-metal EABI described in ARM ABI documents and + // can be accessed via -target arm-none-eabi. This is NOT GNUEABI. + // FIXME: Add a flag for bare-metal for that target and set Triple::EABI + // even for GNUEABI, so we can make a distinction here and still conform to + // the EABI on GNU (and Android) mode. This requires change in Clang, too. + // FIXME: The Darwin exception is temporary, while we move users to + // "*-*-*-macho" triples as quickly as possible. + bool isTargetAEABI() const { + return (TargetTriple.getEnvironment() == Triple::EABI || + TargetTriple.getEnvironment() == Triple::EABIHF) && + !isTargetDarwin() && !isTargetWindows(); + } - bool isAPCS_ABI() const { return TargetABI == ARM_ABI_APCS; } - bool isAAPCS_ABI() const { return TargetABI == ARM_ABI_AAPCS; } + // ARM Targets that support EHABI exception handling standard + // Darwin uses SjLj. Other targets might need more checks. + bool isTargetEHABICompatible() const { + return (TargetTriple.getEnvironment() == Triple::EABI || + TargetTriple.getEnvironment() == Triple::GNUEABI || + TargetTriple.getEnvironment() == Triple::EABIHF || + TargetTriple.getEnvironment() == Triple::GNUEABIHF || + TargetTriple.getEnvironment() == Triple::Android) && + !isTargetDarwin() && !isTargetWindows(); + } - bool isThumb() const { return IsThumb; } - bool isThumb1Only() const { return IsThumb && (ThumbMode == Thumb1); } - bool isThumb2() const { return IsThumb && (ThumbMode == Thumb2); } - bool hasThumb2() const { return ThumbMode >= Thumb2; } + bool isTargetHardFloat() const { + // FIXME: this is invalid for WindowsCE + return TargetTriple.getEnvironment() == Triple::GNUEABIHF || + TargetTriple.getEnvironment() == Triple::EABIHF || + isTargetWindows(); + } + bool isTargetAndroid() const { + return TargetTriple.getEnvironment() == Triple::Android; + } + + bool isAPCS_ABI() const { + assert(TargetABI != ARM_ABI_UNKNOWN); + return TargetABI == ARM_ABI_APCS; + } + bool isAAPCS_ABI() const { + assert(TargetABI != ARM_ABI_UNKNOWN); + return TargetABI == ARM_ABI_AAPCS; + } + + bool isThumb() const { return InThumbMode; } + bool isThumb1Only() const { return InThumbMode && !HasThumb2; } + bool isThumb2() const { return InThumbMode && HasThumb2; } + bool hasThumb2() const { return HasThumb2; } + bool isMClass() const { return ARMProcClass == MClass; } + bool isRClass() const { return ARMProcClass == RClass; } + bool isAClass() const { return ARMProcClass == AClass; } bool isR9Reserved() const { return IsR9Reserved; } - bool useMovt() const { return UseMovt && hasV6T2Ops(); } + bool useMovt(const MachineFunction &MF) const; + + bool supportsTailCall() const { return SupportsTailCall; } bool allowsUnalignedMem() const { return AllowsUnalignedMem; } + bool restrictIT() const { return RestrictIT; } + const std::string & getCPUString() const { return CPUString; } + bool isLittle() const { return IsLittle; } + unsigned getMispredictionPenalty() const; - /// enablePostRAScheduler - True at 'More' optimization. - bool enablePostRAScheduler(CodeGenOpt::Level OptLevel, - TargetSubtarget::AntiDepBreakMode& Mode, - RegClassVector& CriticalPathRCs) const; + /// This function returns true if the target has sincos() routine in its + /// compiler runtime or math libraries. + bool hasSinCos() const; + + /// True for some subtargets at > -O0. + bool enablePostMachineScheduler() const override; + + // enableAtomicExpandLoadLinked - True if we need to expand our atomics. + bool enableAtomicExpandLoadLinked() const override; /// getInstrItins - Return the instruction itineraies based on subtarget /// selection. - const InstrItineraryData &getInstrItineraryData() const { return InstrItins; } + const InstrItineraryData *getInstrItineraryData() const { + return &InstrItins; + } /// getStackAlignment - Returns the minimum alignment known to hold of the /// stack frame on entry to the function and which must be maintained by every @@ -241,6 +453,7 @@ protected: /// GVIsIndirectSymbol - true if the GV will be accessed via an indirect /// symbol. bool GVIsIndirectSymbol(const GlobalValue *GV, Reloc::Model RelocM) const; + }; } // End llvm namespace