lib/Target/BPF/MCTargetDesc/BPFMCTargetDesc.cpp

   1 //===-- BPFMCTargetDesc.cpp - BPF 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 BPF specific target descriptions.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "BPF.h"
  15 #include "BPFMCTargetDesc.h"
  16 #include "BPFMCAsmInfo.h"
  17 #include "InstPrinter/BPFInstPrinter.h"
  18 #include "llvm/MC/MCCodeGenInfo.h"
  19 #include "llvm/MC/MCInstrInfo.h"
  20 #include "llvm/MC/MCRegisterInfo.h"
  21 #include "llvm/MC/MCStreamer.h"
  22 #include "llvm/MC/MCSubtargetInfo.h"
  23 #include "llvm/Support/ErrorHandling.h"
  24 #include "llvm/Support/TargetRegistry.h"
  25
  26 #define GET_INSTRINFO_MC_DESC
  27 #include "BPFGenInstrInfo.inc"
  28
  29 #define GET_SUBTARGETINFO_MC_DESC
  30 #include "BPFGenSubtargetInfo.inc"
  31
  32 #define GET_REGINFO_MC_DESC
  33 #include "BPFGenRegisterInfo.inc"
  34
  35 using namespace llvm;
  36
  37 static MCInstrInfo *createBPFMCInstrInfo() {
  38   MCInstrInfo *X = new MCInstrInfo();
  39   InitBPFMCInstrInfo(X);
  40   return X;
  41 }
  42
  43 static MCRegisterInfo *createBPFMCRegisterInfo(const Triple &TT) {
  44   MCRegisterInfo *X = new MCRegisterInfo();
  45   InitBPFMCRegisterInfo(X, BPF::R11 /* RAReg doesn't exist */);
  46   return X;
  47 }
  48
  49 static MCSubtargetInfo *createBPFMCSubtargetInfo(const Triple &TT,
  50                                                  StringRef CPU, StringRef FS) {
  51   return createBPFMCSubtargetInfoImpl(TT, CPU, FS);
  52 }
  53
  54 static MCCodeGenInfo *createBPFMCCodeGenInfo(const Triple &TT, Reloc::Model RM,
  55                                              CodeModel::Model CM,
  56                                              CodeGenOpt::Level OL) {
  57   MCCodeGenInfo *X = new MCCodeGenInfo();
  58   X->initMCCodeGenInfo(RM, CM, OL);
  59   return X;
  60 }
  61
  62 static MCStreamer *createBPFMCStreamer(const Triple &T,
  63                                        MCContext &Ctx, MCAsmBackend &MAB,
  64                                        raw_pwrite_stream &OS, MCCodeEmitter *Emitter,
  65                                        bool RelaxAll) {
  66   return createELFStreamer(Ctx, MAB, OS, Emitter, RelaxAll);
  67 }
  68
  69 static MCInstPrinter *createBPFMCInstPrinter(const Triple &T,
  70                                              unsigned SyntaxVariant,
  71                                              const MCAsmInfo &MAI,
  72                                              const MCInstrInfo &MII,
  73                                              const MCRegisterInfo &MRI) {
  74   if (SyntaxVariant == 0)
  75     return new BPFInstPrinter(MAI, MII, MRI);
  76   return 0;
  77 }
  78
  79 extern "C" void LLVMInitializeBPFTargetMC() {
  80   for (Target *T : {&TheBPFleTarget, &TheBPFbeTarget, &TheBPFTarget}) {
  81     // Register the MC asm info.
  82     RegisterMCAsmInfo<BPFMCAsmInfo> X(*T);
  83
  84     // Register the MC codegen info.
  85     TargetRegistry::RegisterMCCodeGenInfo(*T, createBPFMCCodeGenInfo);
  86
  87     // Register the MC instruction info.
  88     TargetRegistry::RegisterMCInstrInfo(*T, createBPFMCInstrInfo);
  89
  90     // Register the MC register info.
  91     TargetRegistry::RegisterMCRegInfo(*T, createBPFMCRegisterInfo);
  92
  93     // Register the MC subtarget info.
  94     TargetRegistry::RegisterMCSubtargetInfo(*T,
  95                                             createBPFMCSubtargetInfo);
  96
  97     // Register the object streamer
  98     TargetRegistry::RegisterELFStreamer(*T, createBPFMCStreamer);
  99
 100     // Register the MCInstPrinter.
 101     TargetRegistry::RegisterMCInstPrinter(*T, createBPFMCInstPrinter);
 102   }
 103
 104   // Register the MC code emitter
 105   TargetRegistry::RegisterMCCodeEmitter(TheBPFleTarget, createBPFMCCodeEmitter);
 106   TargetRegistry::RegisterMCCodeEmitter(TheBPFbeTarget, createBPFbeMCCodeEmitter);
 107
 108   // Register the ASM Backend
 109   TargetRegistry::RegisterMCAsmBackend(TheBPFleTarget, createBPFAsmBackend);
 110   TargetRegistry::RegisterMCAsmBackend(TheBPFbeTarget, createBPFbeAsmBackend);
 111
 112   if (sys::IsLittleEndianHost) {
 113     TargetRegistry::RegisterMCCodeEmitter(TheBPFTarget, createBPFMCCodeEmitter);
 114     TargetRegistry::RegisterMCAsmBackend(TheBPFTarget, createBPFAsmBackend);
 115   } else {
 116     TargetRegistry::RegisterMCCodeEmitter(TheBPFTarget, createBPFbeMCCodeEmitter);
 117     TargetRegistry::RegisterMCAsmBackend(TheBPFTarget, createBPFbeAsmBackend);
 118   }
 119 }