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derived classes. Since global data alignment, layout, and mangling is often based on the DataLayout, move it to the TargetMachine. This ensures that global data is going to be layed out and mangled consistently if the subtarget changes on a per function basis. Prior to this all targets(*) have had subtarget dependent code moved out and onto the TargetMachine. *One target hasn't been migrated as part of this change: R600. The R600 port has, as a subtarget feature, the size of pointers and this affects global data layout. I've currently hacked in a FIXME to enable progress, but the port needs to be updated to either pass the 64-bitness to the TargetMachine, or fix the DataLayout to avoid subtarget dependent features. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227113 91177308-0d34-0410-b5e6-96231b3b80d8
286 lines
9.4 KiB
C++
286 lines
9.4 KiB
C++
//===-- MipsSubtarget.h - Define Subtarget for the Mips ---------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the Mips specific subclass of TargetSubtargetInfo.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_MIPS_MIPSSUBTARGET_H
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#define LLVM_LIB_TARGET_MIPS_MIPSSUBTARGET_H
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#include "MCTargetDesc/MipsABIInfo.h"
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#include "MipsFrameLowering.h"
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#include "MipsISelLowering.h"
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#include "MipsInstrInfo.h"
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#include "MipsSelectionDAGInfo.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/MC/MCInstrItineraries.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Target/TargetSubtargetInfo.h"
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#include <string>
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#define GET_SUBTARGETINFO_HEADER
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#include "MipsGenSubtargetInfo.inc"
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namespace llvm {
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class StringRef;
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class MipsTargetMachine;
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class MipsSubtarget : public MipsGenSubtargetInfo {
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virtual void anchor();
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enum MipsArchEnum {
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MipsDefault,
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Mips1, Mips2, Mips32, Mips32r2, Mips32r6, Mips3, Mips4, Mips5, Mips64,
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Mips64r2, Mips64r6
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};
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// Mips architecture version
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MipsArchEnum MipsArchVersion;
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// IsLittle - The target is Little Endian
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bool IsLittle;
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// IsSingleFloat - The target only supports single precision float
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// point operations. This enable the target to use all 32 32-bit
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// floating point registers instead of only using even ones.
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bool IsSingleFloat;
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// IsFPXX - MIPS O32 modeless ABI.
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bool IsFPXX;
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// NoABICalls - Disable SVR4-style position-independent code.
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bool NoABICalls;
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// IsFP64bit - The target processor has 64-bit floating point registers.
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bool IsFP64bit;
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/// Are odd single-precision registers permitted?
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/// This corresponds to -modd-spreg and -mno-odd-spreg
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bool UseOddSPReg;
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// IsNan2008 - IEEE 754-2008 NaN encoding.
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bool IsNaN2008bit;
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// IsFP64bit - General-purpose registers are 64 bits wide
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bool IsGP64bit;
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// HasVFPU - Processor has a vector floating point unit.
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bool HasVFPU;
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// CPU supports cnMIPS (Cavium Networks Octeon CPU).
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bool HasCnMips;
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// isLinux - Target system is Linux. Is false we consider ELFOS for now.
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bool IsLinux;
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// UseSmallSection - Small section is used.
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bool UseSmallSection;
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/// Features related to the presence of specific instructions.
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// HasMips3_32 - The subset of MIPS-III instructions added to MIPS32
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bool HasMips3_32;
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// HasMips3_32r2 - The subset of MIPS-III instructions added to MIPS32r2
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bool HasMips3_32r2;
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// HasMips4_32 - Has the subset of MIPS-IV present in MIPS32
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bool HasMips4_32;
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// HasMips4_32r2 - Has the subset of MIPS-IV present in MIPS32r2
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bool HasMips4_32r2;
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// HasMips5_32r2 - Has the subset of MIPS-V present in MIPS32r2
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bool HasMips5_32r2;
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// InMips16 -- can process Mips16 instructions
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bool InMips16Mode;
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// Mips16 hard float
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bool InMips16HardFloat;
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// PreviousInMips16 -- the function we just processed was in Mips 16 Mode
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bool PreviousInMips16Mode;
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// InMicroMips -- can process MicroMips instructions
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bool InMicroMipsMode;
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// HasDSP, HasDSPR2 -- supports DSP ASE.
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bool HasDSP, HasDSPR2;
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// Allow mixed Mips16 and Mips32 in one source file
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bool AllowMixed16_32;
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// Optimize for space by compiling all functions as Mips 16 unless
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// it needs floating point. Functions needing floating point are
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// compiled as Mips32
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bool Os16;
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// HasMSA -- supports MSA ASE.
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bool HasMSA;
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InstrItineraryData InstrItins;
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// We can override the determination of whether we are in mips16 mode
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// as from the command line
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enum {NoOverride, Mips16Override, NoMips16Override} OverrideMode;
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const MipsTargetMachine &TM;
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Triple TargetTriple;
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const MipsSelectionDAGInfo TSInfo;
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std::unique_ptr<const MipsInstrInfo> InstrInfo;
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std::unique_ptr<const MipsFrameLowering> FrameLowering;
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std::unique_ptr<const MipsTargetLowering> TLInfo;
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public:
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/// This overrides the PostRAScheduler bit in the SchedModel for each CPU.
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bool enablePostMachineScheduler() const override;
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void getCriticalPathRCs(RegClassVector &CriticalPathRCs) const override;
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CodeGenOpt::Level getOptLevelToEnablePostRAScheduler() const override;
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/// Only O32 and EABI supported right now.
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bool isABI_EABI() const;
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bool isABI_N64() const;
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bool isABI_N32() const;
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bool isABI_O32() const;
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const MipsABIInfo &getABI() const;
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bool isABI_FPXX() const { return isABI_O32() && IsFPXX; }
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/// This constructor initializes the data members to match that
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/// of the specified triple.
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MipsSubtarget(const std::string &TT, const std::string &CPU,
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const std::string &FS, bool little,
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const MipsTargetMachine &TM);
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/// ParseSubtargetFeatures - Parses features string setting specified
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/// subtarget options. Definition of function is auto generated by tblgen.
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void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
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bool hasMips1() const { return MipsArchVersion >= Mips1; }
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bool hasMips2() const { return MipsArchVersion >= Mips2; }
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bool hasMips3() const { return MipsArchVersion >= Mips3; }
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bool hasMips4() const { return MipsArchVersion >= Mips4; }
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bool hasMips5() const { return MipsArchVersion >= Mips5; }
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bool hasMips4_32() const { return HasMips4_32; }
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bool hasMips4_32r2() const { return HasMips4_32r2; }
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bool hasMips32() const {
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return MipsArchVersion >= Mips32 && MipsArchVersion != Mips3 &&
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MipsArchVersion != Mips4 && MipsArchVersion != Mips5;
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}
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bool hasMips32r2() const {
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return MipsArchVersion == Mips32r2 || MipsArchVersion == Mips32r6 ||
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MipsArchVersion == Mips64r2 || MipsArchVersion == Mips64r6;
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}
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bool hasMips32r6() const {
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return MipsArchVersion == Mips32r6 || MipsArchVersion == Mips64r6;
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}
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bool hasMips64() const { return MipsArchVersion >= Mips64; }
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bool hasMips64r2() const {
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return MipsArchVersion == Mips64r2 || MipsArchVersion == Mips64r6;
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}
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bool hasMips64r6() const { return MipsArchVersion == Mips64r6; }
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bool hasCnMips() const { return HasCnMips; }
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bool isLittle() const { return IsLittle; }
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bool isABICalls() const { return !NoABICalls; }
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bool isFPXX() const { return IsFPXX; }
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bool isFP64bit() const { return IsFP64bit; }
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bool useOddSPReg() const { return UseOddSPReg; }
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bool noOddSPReg() const { return !UseOddSPReg; }
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bool isNaN2008() const { return IsNaN2008bit; }
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bool isGP64bit() const { return IsGP64bit; }
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bool isGP32bit() const { return !IsGP64bit; }
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unsigned getGPRSizeInBytes() const { return isGP64bit() ? 8 : 4; }
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bool isSingleFloat() const { return IsSingleFloat; }
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bool hasVFPU() const { return HasVFPU; }
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bool inMips16Mode() const { return InMips16Mode; }
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bool inMips16ModeDefault() const {
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return InMips16Mode;
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}
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// Hard float for mips16 means essentially to compile as soft float
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// but to use a runtime library for soft float that is written with
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// native mips32 floating point instructions (those runtime routines
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// run in mips32 hard float mode).
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bool inMips16HardFloat() const {
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return inMips16Mode() && InMips16HardFloat;
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}
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bool inMicroMipsMode() const { return InMicroMipsMode; }
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bool hasDSP() const { return HasDSP; }
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bool hasDSPR2() const { return HasDSPR2; }
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bool hasMSA() const { return HasMSA; }
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bool useSmallSection() const { return UseSmallSection; }
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bool hasStandardEncoding() const { return !inMips16Mode(); }
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bool abiUsesSoftFloat() const;
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bool enableLongBranchPass() const {
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return hasStandardEncoding() || allowMixed16_32();
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}
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/// Features related to the presence of specific instructions.
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bool hasExtractInsert() const { return !inMips16Mode() && hasMips32r2(); }
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bool hasMTHC1() const { return hasMips32r2(); }
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bool allowMixed16_32() const { return inMips16ModeDefault() |
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AllowMixed16_32; }
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bool os16() const { return Os16; }
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bool isTargetNaCl() const { return TargetTriple.isOSNaCl(); }
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// for now constant islands are on for the whole compilation unit but we only
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// really use them if in addition we are in mips16 mode
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static bool useConstantIslands();
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unsigned stackAlignment() const { return hasMips64() ? 16 : 8; }
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// Grab relocation model
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Reloc::Model getRelocationModel() const;
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MipsSubtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS,
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const TargetMachine &TM);
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/// Does the system support unaligned memory access.
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///
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/// MIPS32r6/MIPS64r6 require full unaligned access support but does not
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/// specify which component of the system provides it. Hardware, software, and
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/// hybrid implementations are all valid.
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bool systemSupportsUnalignedAccess() const { return hasMips32r6(); }
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// Set helper classes
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void setHelperClassesMips16();
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void setHelperClassesMipsSE();
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const MipsSelectionDAGInfo *getSelectionDAGInfo() const override {
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return &TSInfo;
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}
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const MipsInstrInfo *getInstrInfo() const override { return InstrInfo.get(); }
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const TargetFrameLowering *getFrameLowering() const override {
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return FrameLowering.get();
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}
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const MipsRegisterInfo *getRegisterInfo() const override {
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return &InstrInfo->getRegisterInfo();
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}
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const MipsTargetLowering *getTargetLowering() const override {
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return TLInfo.get();
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}
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const InstrItineraryData *getInstrItineraryData() const override {
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return &InstrItins;
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}
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};
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} // End llvm namespace
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#endif
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