contrib/llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.cpp

   1 //===-- WebAssemblyMCTargetDesc.cpp - WebAssembly 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 /// \file
  11 /// \brief This file provides WebAssembly-specific target descriptions.
  12 ///
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "WebAssemblyMCTargetDesc.h"
  16 #include "InstPrinter/WebAssemblyInstPrinter.h"
  17 #include "WebAssemblyMCAsmInfo.h"
  18 #include "WebAssemblyTargetStreamer.h"
  19 #include "llvm/MC/MCInstrInfo.h"
  20 #include "llvm/MC/MCRegisterInfo.h"
  21 #include "llvm/MC/MCSubtargetInfo.h"
  22 #include "llvm/Support/ErrorHandling.h"
  23 #include "llvm/Support/TargetRegistry.h"
  24 using namespace llvm;
  25
  26 #define DEBUG_TYPE "wasm-mc-target-desc"
  27
  28 #define GET_INSTRINFO_MC_DESC
  29 #include "WebAssemblyGenInstrInfo.inc"
  30
  31 #define GET_SUBTARGETINFO_MC_DESC
  32 #include "WebAssemblyGenSubtargetInfo.inc"
  33
  34 #define GET_REGINFO_MC_DESC
  35 #include "WebAssemblyGenRegisterInfo.inc"
  36
  37 static MCAsmInfo *createMCAsmInfo(const MCRegisterInfo & /*MRI*/,
  38                                   const Triple &TT) {
  39   return new WebAssemblyMCAsmInfo(TT);
  40 }
  41
  42 static void adjustCodeGenOpts(const Triple & /*TT*/, Reloc::Model /*RM*/,
  43                               CodeModel::Model &CM) {
  44   CodeModel::Model M = (CM == CodeModel::Default || CM == CodeModel::JITDefault)
  45                            ? CodeModel::Large
  46                            : CM;
  47   if (M != CodeModel::Large)
  48     report_fatal_error("Non-large code models are not supported yet");
  49 }
  50
  51 static MCInstrInfo *createMCInstrInfo() {
  52   MCInstrInfo *X = new MCInstrInfo();
  53   InitWebAssemblyMCInstrInfo(X);
  54   return X;
  55 }
  56
  57 static MCRegisterInfo *createMCRegisterInfo(const Triple & /*T*/) {
  58   MCRegisterInfo *X = new MCRegisterInfo();
  59   InitWebAssemblyMCRegisterInfo(X, 0);
  60   return X;
  61 }
  62
  63 static MCInstPrinter *createMCInstPrinter(const Triple & /*T*/,
  64                                           unsigned SyntaxVariant,
  65                                           const MCAsmInfo &MAI,
  66                                           const MCInstrInfo &MII,
  67                                           const MCRegisterInfo &MRI) {
  68   assert(SyntaxVariant == 0 && "WebAssembly only has one syntax variant");
  69   return new WebAssemblyInstPrinter(MAI, MII, MRI);
  70 }
  71
  72 static MCCodeEmitter *createCodeEmitter(const MCInstrInfo &MCII,
  73                                         const MCRegisterInfo & /*MRI*/,
  74                                         MCContext & /*Ctx*/) {
  75   return createWebAssemblyMCCodeEmitter(MCII);
  76 }
  77
  78 static MCAsmBackend *createAsmBackend(const Target & /*T*/,
  79                                       const MCRegisterInfo & /*MRI*/,
  80                                       const Triple &TT, StringRef /*CPU*/) {
  81   return createWebAssemblyAsmBackend(TT);
  82 }
  83
  84 static MCSubtargetInfo *createMCSubtargetInfo(const Triple &TT, StringRef CPU,
  85                                               StringRef FS) {
  86   return createWebAssemblyMCSubtargetInfoImpl(TT, CPU, FS);
  87 }
  88
  89 static MCTargetStreamer *
  90 createObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo & /*STI*/) {
  91   return new WebAssemblyTargetELFStreamer(S);
  92 }
  93
  94 static MCTargetStreamer *createAsmTargetStreamer(MCStreamer &S,
  95                                                  formatted_raw_ostream &OS,
  96                                                  MCInstPrinter * /*InstPrint*/,
  97                                                  bool /*isVerboseAsm*/) {
  98   return new WebAssemblyTargetAsmStreamer(S, OS);
  99 }
 100
 101 // Force static initialization.
 102 extern "C" void LLVMInitializeWebAssemblyTargetMC() {
 103   for (Target *T : {&TheWebAssemblyTarget32, &TheWebAssemblyTarget64}) {
 104     // Register the MC asm info.
 105     RegisterMCAsmInfoFn X(*T, createMCAsmInfo);
 106
 107     // Register the MC instruction info.
 108     TargetRegistry::RegisterMCInstrInfo(*T, createMCInstrInfo);
 109
 110     // Register the MC codegen info.
 111     TargetRegistry::registerMCAdjustCodeGenOpts(*T, adjustCodeGenOpts);
 112
 113     // Register the MC register info.
 114     TargetRegistry::RegisterMCRegInfo(*T, createMCRegisterInfo);
 115
 116     // Register the MCInstPrinter.
 117     TargetRegistry::RegisterMCInstPrinter(*T, createMCInstPrinter);
 118
 119     // Register the MC code emitter.
 120     TargetRegistry::RegisterMCCodeEmitter(*T, createCodeEmitter);
 121
 122     // Register the ASM Backend.
 123     TargetRegistry::RegisterMCAsmBackend(*T, createAsmBackend);
 124
 125     // Register the MC subtarget info.
 126     TargetRegistry::RegisterMCSubtargetInfo(*T, createMCSubtargetInfo);
 127
 128     // Register the object target streamer.
 129     TargetRegistry::RegisterObjectTargetStreamer(*T,
 130                                                  createObjectTargetStreamer);
 131     // Register the asm target streamer.
 132     TargetRegistry::RegisterAsmTargetStreamer(*T, createAsmTargetStreamer);
 133   }
 134 }