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   if (TT.isOSBinFormatELF())
40     return new WebAssemblyMCAsmInfoELF(TT);
41   return new WebAssemblyMCAsmInfo(TT);
42 }
43 
44 static void adjustCodeGenOpts(const Triple & /*TT*/, Reloc::Model /*RM*/,
45                               CodeModel::Model &CM) {
46   CodeModel::Model M = (CM == CodeModel::Default || CM == CodeModel::JITDefault)
47                            ? CodeModel::Large
48                            : CM;
49   if (M != CodeModel::Large)
50     report_fatal_error("Non-large code models are not supported yet");
51 }
52 
53 static MCInstrInfo *createMCInstrInfo() {
54   MCInstrInfo *X = new MCInstrInfo();
55   InitWebAssemblyMCInstrInfo(X);
56   return X;
57 }
58 
59 static MCRegisterInfo *createMCRegisterInfo(const Triple & /*T*/) {
60   MCRegisterInfo *X = new MCRegisterInfo();
61   InitWebAssemblyMCRegisterInfo(X, 0);
62   return X;
63 }
64 
65 static MCInstPrinter *createMCInstPrinter(const Triple & /*T*/,
66                                           unsigned SyntaxVariant,
67                                           const MCAsmInfo &MAI,
68                                           const MCInstrInfo &MII,
69                                           const MCRegisterInfo &MRI) {
70   assert(SyntaxVariant == 0 && "WebAssembly only has one syntax variant");
71   return new WebAssemblyInstPrinter(MAI, MII, MRI);
72 }
73 
74 static MCCodeEmitter *createCodeEmitter(const MCInstrInfo &MCII,
75                                         const MCRegisterInfo & /*MRI*/,
76                                         MCContext &Ctx) {
77   return createWebAssemblyMCCodeEmitter(MCII, Ctx);
78 }
79 
80 static MCAsmBackend *createAsmBackend(const Target & /*T*/,
81                                       const MCRegisterInfo & /*MRI*/,
82                                       const Triple &TT, StringRef /*CPU*/,
83                                       const MCTargetOptions & /*Options*/) {
84   return createWebAssemblyAsmBackend(TT);
85 }
86 
87 static MCSubtargetInfo *createMCSubtargetInfo(const Triple &TT, StringRef CPU,
88                                               StringRef FS) {
89   return createWebAssemblyMCSubtargetInfoImpl(TT, CPU, FS);
90 }
91 
92 static MCTargetStreamer *
93 createObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) {
94   const Triple &TT = STI.getTargetTriple();
95   if (TT.isOSBinFormatELF())
96     return new WebAssemblyTargetELFStreamer(S);
97 
98   return new WebAssemblyTargetWasmStreamer(S);
99 }
100 
101 static MCTargetStreamer *createAsmTargetStreamer(MCStreamer &S,
102                                                  formatted_raw_ostream &OS,
103                                                  MCInstPrinter * /*InstPrint*/,
104                                                  bool /*isVerboseAsm*/) {
105   return new WebAssemblyTargetAsmStreamer(S, OS);
106 }
107 
108 // Force static initialization.
109 extern "C" void LLVMInitializeWebAssemblyTargetMC() {
110   for (Target *T :
111        {&getTheWebAssemblyTarget32(), &getTheWebAssemblyTarget64()}) {
112     // Register the MC asm info.
113     RegisterMCAsmInfoFn X(*T, createMCAsmInfo);
114 
115     // Register the MC instruction info.
116     TargetRegistry::RegisterMCInstrInfo(*T, createMCInstrInfo);
117 
118     // Register the MC codegen info.
119     TargetRegistry::registerMCAdjustCodeGenOpts(*T, adjustCodeGenOpts);
120 
121     // Register the MC register info.
122     TargetRegistry::RegisterMCRegInfo(*T, createMCRegisterInfo);
123 
124     // Register the MCInstPrinter.
125     TargetRegistry::RegisterMCInstPrinter(*T, createMCInstPrinter);
126 
127     // Register the MC code emitter.
128     TargetRegistry::RegisterMCCodeEmitter(*T, createCodeEmitter);
129 
130     // Register the ASM Backend.
131     TargetRegistry::RegisterMCAsmBackend(*T, createAsmBackend);
132 
133     // Register the MC subtarget info.
134     TargetRegistry::RegisterMCSubtargetInfo(*T, createMCSubtargetInfo);
135 
136     // Register the object target streamer.
137     TargetRegistry::RegisterObjectTargetStreamer(*T,
138                                                  createObjectTargetStreamer);
139     // Register the asm target streamer.
140     TargetRegistry::RegisterAsmTargetStreamer(*T, createAsmTargetStreamer);
141   }
142 }
143 
144 wasm::ValType WebAssembly::toValType(const MVT &Ty) {
145   switch (Ty.SimpleTy) {
146   case MVT::i32: return wasm::ValType::I32;
147   case MVT::i64: return wasm::ValType::I64;
148   case MVT::f32: return wasm::ValType::F32;
149   case MVT::f64: return wasm::ValType::F64;
150   default: llvm_unreachable("unexpected type");
151   }
152 }
153