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      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 /// 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 MCInstrInfo *createMCInstrInfo() {
     43   MCInstrInfo *X = new MCInstrInfo();
     44   InitWebAssemblyMCInstrInfo(X);
     45   return X;
     46 }
     47 
     48 static MCRegisterInfo *createMCRegisterInfo(const Triple & /*T*/) {
     49   MCRegisterInfo *X = new MCRegisterInfo();
     50   InitWebAssemblyMCRegisterInfo(X, 0);
     51   return X;
     52 }
     53 
     54 static MCInstPrinter *createMCInstPrinter(const Triple & /*T*/,
     55                                           unsigned SyntaxVariant,
     56                                           const MCAsmInfo &MAI,
     57                                           const MCInstrInfo &MII,
     58                                           const MCRegisterInfo &MRI) {
     59   assert(SyntaxVariant == 0 && "WebAssembly only has one syntax variant");
     60   return new WebAssemblyInstPrinter(MAI, MII, MRI);
     61 }
     62 
     63 static MCCodeEmitter *createCodeEmitter(const MCInstrInfo &MCII,
     64                                         const MCRegisterInfo & /*MRI*/,
     65                                         MCContext &Ctx) {
     66   return createWebAssemblyMCCodeEmitter(MCII);
     67 }
     68 
     69 static MCAsmBackend *createAsmBackend(const Target & /*T*/,
     70                                       const MCSubtargetInfo &STI,
     71                                       const MCRegisterInfo & /*MRI*/,
     72                                       const MCTargetOptions & /*Options*/) {
     73   return createWebAssemblyAsmBackend(STI.getTargetTriple());
     74 }
     75 
     76 static MCSubtargetInfo *createMCSubtargetInfo(const Triple &TT, StringRef CPU,
     77                                               StringRef FS) {
     78   return createWebAssemblyMCSubtargetInfoImpl(TT, CPU, FS);
     79 }
     80 
     81 static MCTargetStreamer *
     82 createObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) {
     83   return new WebAssemblyTargetWasmStreamer(S);
     84 }
     85 
     86 static MCTargetStreamer *createAsmTargetStreamer(MCStreamer &S,
     87                                                  formatted_raw_ostream &OS,
     88                                                  MCInstPrinter * /*InstPrint*/,
     89                                                  bool /*isVerboseAsm*/) {
     90   return new WebAssemblyTargetAsmStreamer(S, OS);
     91 }
     92 
     93 // Force static initialization.
     94 extern "C" void LLVMInitializeWebAssemblyTargetMC() {
     95   for (Target *T :
     96        {&getTheWebAssemblyTarget32(), &getTheWebAssemblyTarget64()}) {
     97     // Register the MC asm info.
     98     RegisterMCAsmInfoFn X(*T, createMCAsmInfo);
     99 
    100     // Register the MC instruction info.
    101     TargetRegistry::RegisterMCInstrInfo(*T, createMCInstrInfo);
    102 
    103     // Register the MC register info.
    104     TargetRegistry::RegisterMCRegInfo(*T, createMCRegisterInfo);
    105 
    106     // Register the MCInstPrinter.
    107     TargetRegistry::RegisterMCInstPrinter(*T, createMCInstPrinter);
    108 
    109     // Register the MC code emitter.
    110     TargetRegistry::RegisterMCCodeEmitter(*T, createCodeEmitter);
    111 
    112     // Register the ASM Backend.
    113     TargetRegistry::RegisterMCAsmBackend(*T, createAsmBackend);
    114 
    115     // Register the MC subtarget info.
    116     TargetRegistry::RegisterMCSubtargetInfo(*T, createMCSubtargetInfo);
    117 
    118     // Register the object target streamer.
    119     TargetRegistry::RegisterObjectTargetStreamer(*T,
    120                                                  createObjectTargetStreamer);
    121     // Register the asm target streamer.
    122     TargetRegistry::RegisterAsmTargetStreamer(*T, createAsmTargetStreamer);
    123   }
    124 }
    125 
    126 wasm::ValType WebAssembly::toValType(const MVT &Ty) {
    127   switch (Ty.SimpleTy) {
    128   case MVT::i32: return wasm::ValType::I32;
    129   case MVT::i64: return wasm::ValType::I64;
    130   case MVT::f32: return wasm::ValType::F32;
    131   case MVT::f64: return wasm::ValType::F64;
    132   case MVT::ExceptRef: return wasm::ValType::EXCEPT_REF;
    133   default: llvm_unreachable("unexpected type");
    134   }
    135 }
    136