lib/Target/AArch64/MCTargetDesc/AArch64MCTargetDesc.cpp

   1 //===-- AArch64MCTargetDesc.cpp - AArch64 Target Descriptions -------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file provides AArch64 specific target descriptions.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "AArch64MCTargetDesc.h"
  15 #include "AArch64ELFStreamer.h"
  16 #include "AArch64MCAsmInfo.h"
  17 #include "InstPrinter/AArch64InstPrinter.h"
  18 #include "llvm/ADT/APInt.h"
  19 #include "llvm/MC/MCCodeGenInfo.h"
  20 #include "llvm/MC/MCInstrAnalysis.h"
  21 #include "llvm/MC/MCInstrInfo.h"
  22 #include "llvm/MC/MCRegisterInfo.h"
  23 #include "llvm/MC/MCStreamer.h"
  24 #include "llvm/MC/MCSubtargetInfo.h"
  25 #include "llvm/Support/TargetRegistry.h"
  26 #include "llvm/Support/ErrorHandling.h"
  27
  28 #define GET_REGINFO_MC_DESC
  29 #include "AArch64GenRegisterInfo.inc"
  30
  31 #define GET_INSTRINFO_MC_DESC
  32 #include "AArch64GenInstrInfo.inc"
  33
  34 #define GET_SUBTARGETINFO_MC_DESC
  35 #include "AArch64GenSubtargetInfo.inc"
  36
  37 using namespace llvm;
  38
  39 MCSubtargetInfo *AArch64_MC::createAArch64MCSubtargetInfo(StringRef TT,
  40                                                           StringRef CPU,
  41                                                           StringRef FS) {
  42   MCSubtargetInfo *X = new MCSubtargetInfo();
  43   InitAArch64MCSubtargetInfo(X, TT, CPU, "");
  44   return X;
  45 }
  46
  47
  48 static MCInstrInfo *createAArch64MCInstrInfo() {
  49   MCInstrInfo *X = new MCInstrInfo();
  50   InitAArch64MCInstrInfo(X);
  51   return X;
  52 }
  53
  54 static MCRegisterInfo *createAArch64MCRegisterInfo(StringRef Triple) {
  55   MCRegisterInfo *X = new MCRegisterInfo();
  56   InitAArch64MCRegisterInfo(X, AArch64::X30);
  57   return X;
  58 }
  59
  60 static MCAsmInfo *createAArch64MCAsmInfo(const Target &T, StringRef TT) {
  61   Triple TheTriple(TT);
  62
  63   MCAsmInfo *MAI = new AArch64ELFMCAsmInfo();
  64   MachineLocation Dst(MachineLocation::VirtualFP);
  65   MachineLocation Src(AArch64::XSP, 0);
  66   MAI->addInitialFrameState(0, Dst, Src);
  67
  68   return MAI;
  69 }
  70
  71 static MCCodeGenInfo *createAArch64MCCodeGenInfo(StringRef TT, Reloc::Model RM,
  72                                                  CodeModel::Model CM,
  73                                                  CodeGenOpt::Level OL) {
  74   MCCodeGenInfo *X = new MCCodeGenInfo();
  75   if (RM == Reloc::Default || RM == Reloc::DynamicNoPIC) {
  76     // On ELF platforms the default static relocation model has a smart enough
  77     // linker to cope with referencing external symbols defined in a shared
  78     // library. Hence DynamicNoPIC doesn't need to be promoted to PIC.
  79     RM = Reloc::Static;
  80   }
  81
  82   if (CM == CodeModel::Default)
  83     CM = CodeModel::Small;
  84
  85   X->InitMCCodeGenInfo(RM, CM, OL);
  86   return X;
  87 }
  88
  89 static MCStreamer *createMCStreamer(const Target &T, StringRef TT,
  90                                     MCContext &Ctx, MCAsmBackend &MAB,
  91                                     raw_ostream &OS,
  92                                     MCCodeEmitter *Emitter,
  93                                     bool RelaxAll,
  94                                     bool NoExecStack) {
  95   Triple TheTriple(TT);
  96
  97   return createAArch64ELFStreamer(Ctx, MAB, OS, Emitter, RelaxAll, NoExecStack);
  98 }
  99
 100
 101 static MCInstPrinter *createAArch64MCInstPrinter(const Target &T,
 102                                                  unsigned SyntaxVariant,
 103                                                  const MCAsmInfo &MAI,
 104                                                  const MCInstrInfo &MII,
 105                                                  const MCRegisterInfo &MRI,
 106                                                  const MCSubtargetInfo &STI) {
 107   if (SyntaxVariant == 0)
 108     return new AArch64InstPrinter(MAI, MII, MRI, STI);
 109   return 0;
 110 }
 111
 112 namespace {
 113
 114 class AArch64MCInstrAnalysis : public MCInstrAnalysis {
 115 public:
 116   AArch64MCInstrAnalysis(const MCInstrInfo *Info) : MCInstrAnalysis(Info) {}
 117
 118   virtual bool isUnconditionalBranch(const MCInst &Inst) const {
 119     if (Inst.getOpcode() == AArch64::Bcc
 120         && Inst.getOperand(0).getImm() == A64CC::AL)
 121       return true;
 122     return MCInstrAnalysis::isUnconditionalBranch(Inst);
 123   }
 124
 125   virtual bool isConditionalBranch(const MCInst &Inst) const {
 126     if (Inst.getOpcode() == AArch64::Bcc
 127         && Inst.getOperand(0).getImm() == A64CC::AL)
 128       return false;
 129     return MCInstrAnalysis::isConditionalBranch(Inst);
 130   }
 131
 132   uint64_t evaluateBranch(const MCInst &Inst, uint64_t Addr,
 133                           uint64_t Size) const {
 134     unsigned LblOperand = Inst.getOpcode() == AArch64::Bcc ? 1 : 0;
 135     // FIXME: We only handle PCRel branches for now.
 136     if (Info->get(Inst.getOpcode()).OpInfo[LblOperand].OperandType
 137         != MCOI::OPERAND_PCREL)
 138       return -1ULL;
 139
 140     int64_t Imm = Inst.getOperand(LblOperand).getImm();
 141
 142     return Addr + Imm;
 143   }
 144 };
 145
 146 }
 147
 148 static MCInstrAnalysis *createAArch64MCInstrAnalysis(const MCInstrInfo *Info) {
 149   return new AArch64MCInstrAnalysis(Info);
 150 }
 151
 152
 153
 154 extern "C" void LLVMInitializeAArch64TargetMC() {
 155   // Register the MC asm info.
 156   RegisterMCAsmInfoFn A(TheAArch64Target, createAArch64MCAsmInfo);
 157
 158   // Register the MC codegen info.
 159   TargetRegistry::RegisterMCCodeGenInfo(TheAArch64Target,
 160                                         createAArch64MCCodeGenInfo);
 161
 162   // Register the MC instruction info.
 163   TargetRegistry::RegisterMCInstrInfo(TheAArch64Target,
 164                                       createAArch64MCInstrInfo);
 165
 166   // Register the MC register info.
 167   TargetRegistry::RegisterMCRegInfo(TheAArch64Target,
 168                                     createAArch64MCRegisterInfo);
 169
 170   // Register the MC subtarget info.
 171   using AArch64_MC::createAArch64MCSubtargetInfo;
 172   TargetRegistry::RegisterMCSubtargetInfo(TheAArch64Target,
 173                                           createAArch64MCSubtargetInfo);
 174
 175   // Register the MC instruction analyzer.
 176   TargetRegistry::RegisterMCInstrAnalysis(TheAArch64Target,
 177                                           createAArch64MCInstrAnalysis);
 178
 179   // Register the MC Code Emitter
 180   TargetRegistry::RegisterMCCodeEmitter(TheAArch64Target,
 181                                         createAArch64MCCodeEmitter);
 182
 183   // Register the asm backend.
 184   TargetRegistry::RegisterMCAsmBackend(TheAArch64Target,
 185                                        createAArch64AsmBackend);
 186
 187   // Register the object streamer.
 188   TargetRegistry::RegisterMCObjectStreamer(TheAArch64Target,
 189                                            createMCStreamer);
 190
 191   // Register the MCInstPrinter.
 192   TargetRegistry::RegisterMCInstPrinter(TheAArch64Target,
 193                                         createAArch64MCInstPrinter);
 194 }