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(StringRef TT) {
  44   MCRegisterInfo *X = new MCRegisterInfo();
  45   InitBPFMCRegisterInfo(X, BPF::R11 /* RAReg doesn't exist */);
  46   return X;
  47 }
  48
  49 static MCSubtargetInfo *createBPFMCSubtargetInfo(StringRef TT, StringRef CPU,
  50                                                  StringRef FS) {
  51   MCSubtargetInfo *X = new MCSubtargetInfo();
  52   InitBPFMCSubtargetInfo(X, TT, CPU, FS);
  53   return X;
  54 }
  55
  56 static MCCodeGenInfo *createBPFMCCodeGenInfo(StringRef TT, Reloc::Model RM,
  57                                              CodeModel::Model CM,
  58                                              CodeGenOpt::Level OL) {
  59   MCCodeGenInfo *X = new MCCodeGenInfo();
  60   X->InitMCCodeGenInfo(RM, CM, OL);
  61   return X;
  62 }
  63
  64 static MCStreamer *createBPFMCStreamer(const Triple &T,
  65                                        MCContext &Ctx, MCAsmBackend &MAB,
  66                                        raw_pwrite_stream &OS, MCCodeEmitter *Emitter,
  67                                        bool RelaxAll) {
  68   return createELFStreamer(Ctx, MAB, OS, Emitter, RelaxAll);
  69 }
  70
  71 static MCInstPrinter *createBPFMCInstPrinter(const Triple &T,
  72                                              unsigned SyntaxVariant,
  73                                              const MCAsmInfo &MAI,
  74                                              const MCInstrInfo &MII,
  75                                              const MCRegisterInfo &MRI) {
  76   if (SyntaxVariant == 0)
  77     return new BPFInstPrinter(MAI, MII, MRI);
  78   return 0;
  79 }
  80
  81 extern "C" void LLVMInitializeBPFTargetMC() {
  82   // Register the MC asm info.
  83   RegisterMCAsmInfo<BPFMCAsmInfo> X(TheBPFTarget);
  84
  85   // Register the MC codegen info.
  86   TargetRegistry::RegisterMCCodeGenInfo(TheBPFTarget, createBPFMCCodeGenInfo);
  87
  88   // Register the MC instruction info.
  89   TargetRegistry::RegisterMCInstrInfo(TheBPFTarget, createBPFMCInstrInfo);
  90
  91   // Register the MC register info.
  92   TargetRegistry::RegisterMCRegInfo(TheBPFTarget, createBPFMCRegisterInfo);
  93
  94   // Register the MC subtarget info.
  95   TargetRegistry::RegisterMCSubtargetInfo(TheBPFTarget,
  96                                           createBPFMCSubtargetInfo);
  97
  98   // Register the MC code emitter
  99   TargetRegistry::RegisterMCCodeEmitter(TheBPFTarget,
 100                                         llvm::createBPFMCCodeEmitter);
 101
 102   // Register the ASM Backend
 103   TargetRegistry::RegisterMCAsmBackend(TheBPFTarget, createBPFAsmBackend);
 104
 105   // Register the object streamer
 106   TargetRegistry::RegisterELFStreamer(TheBPFTarget, createBPFMCStreamer);
 107
 108   // Register the MCInstPrinter.
 109   TargetRegistry::RegisterMCInstPrinter(TheBPFTarget, createBPFMCInstPrinter);
 110 }