BPFMCTargetDesc.cpp revision 284734 
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
35using namespace llvm;
36
37static MCInstrInfo *createBPFMCInstrInfo() {
38  MCInstrInfo *X = new MCInstrInfo();
39  InitBPFMCInstrInfo(X);
40  return X;
41}
42
43static MCRegisterInfo *createBPFMCRegisterInfo(StringRef TT) {
44  MCRegisterInfo *X = new MCRegisterInfo();
45  InitBPFMCRegisterInfo(X, BPF::R11 /* RAReg doesn't exist */);
46  return X;
47}
48
49static MCSubtargetInfo *createBPFMCSubtargetInfo(const Triple &TT,
50                                                 StringRef CPU, StringRef FS) {
51  MCSubtargetInfo *X = new MCSubtargetInfo();
52  InitBPFMCSubtargetInfo(X, TT, CPU, FS);
53  return X;
54}
55
56static 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
64static 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
71static 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
81extern "C" void LLVMInitializeBPFTargetMC() {
82  for (Target *T : {&TheBPFleTarget, &TheBPFbeTarget, &TheBPFTarget}) {
83    // Register the MC asm info.
84    RegisterMCAsmInfo<BPFMCAsmInfo> X(*T);
85
86    // Register the MC codegen info.
87    TargetRegistry::RegisterMCCodeGenInfo(*T, createBPFMCCodeGenInfo);
88
89    // Register the MC instruction info.
90    TargetRegistry::RegisterMCInstrInfo(*T, createBPFMCInstrInfo);
91
92    // Register the MC register info.
93    TargetRegistry::RegisterMCRegInfo(*T, createBPFMCRegisterInfo);
94
95    // Register the MC subtarget info.
96    TargetRegistry::RegisterMCSubtargetInfo(*T,
97                                            createBPFMCSubtargetInfo);
98
99    // Register the object streamer
100    TargetRegistry::RegisterELFStreamer(*T, createBPFMCStreamer);
101
102    // Register the MCInstPrinter.
103    TargetRegistry::RegisterMCInstPrinter(*T, createBPFMCInstPrinter);
104  }
105
106  // Register the MC code emitter
107  TargetRegistry::RegisterMCCodeEmitter(TheBPFleTarget, createBPFMCCodeEmitter);
108  TargetRegistry::RegisterMCCodeEmitter(TheBPFbeTarget, createBPFbeMCCodeEmitter);
109
110  // Register the ASM Backend
111  TargetRegistry::RegisterMCAsmBackend(TheBPFleTarget, createBPFAsmBackend);
112  TargetRegistry::RegisterMCAsmBackend(TheBPFbeTarget, createBPFbeAsmBackend);
113
114  if (sys::IsLittleEndianHost) {
115    TargetRegistry::RegisterMCCodeEmitter(TheBPFTarget, createBPFMCCodeEmitter);
116    TargetRegistry::RegisterMCAsmBackend(TheBPFTarget, createBPFAsmBackend);
117  } else {
118    TargetRegistry::RegisterMCCodeEmitter(TheBPFTarget, createBPFbeMCCodeEmitter);
119    TargetRegistry::RegisterMCAsmBackend(TheBPFTarget, createBPFbeAsmBackend);
120  }
121}
122