| //==-- WebAssemblyTargetStreamer.cpp - WebAssembly Target Streamer Methods --=// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file |
| /// This file defines WebAssembly-specific target streamer classes. |
| /// These are for implementing support for target-specific assembly directives. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #include "WebAssemblyTargetStreamer.h" |
| #include "InstPrinter/WebAssemblyInstPrinter.h" |
| #include "WebAssemblyMCTargetDesc.h" |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/MC/MCSectionWasm.h" |
| #include "llvm/MC/MCSubtargetInfo.h" |
| #include "llvm/MC/MCSymbolWasm.h" |
| #include "llvm/Support/Casting.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/FormattedStream.h" |
| using namespace llvm; |
| |
| WebAssemblyTargetStreamer::WebAssemblyTargetStreamer(MCStreamer &S) |
| : MCTargetStreamer(S) {} |
| |
| void WebAssemblyTargetStreamer::emitValueType(wasm::ValType Type) { |
| Streamer.EmitIntValue(uint8_t(Type), 1); |
| } |
| |
| WebAssemblyTargetAsmStreamer::WebAssemblyTargetAsmStreamer( |
| MCStreamer &S, formatted_raw_ostream &OS) |
| : WebAssemblyTargetStreamer(S), OS(OS) {} |
| |
| WebAssemblyTargetWasmStreamer::WebAssemblyTargetWasmStreamer(MCStreamer &S) |
| : WebAssemblyTargetStreamer(S) {} |
| |
| static void printTypes(formatted_raw_ostream &OS, |
| ArrayRef<wasm::ValType> Types) { |
| bool First = true; |
| for (auto Type : Types) { |
| if (First) |
| First = false; |
| else |
| OS << ", "; |
| OS << WebAssembly::typeToString(Type); |
| } |
| OS << '\n'; |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitLocal(ArrayRef<wasm::ValType> Types) { |
| if (!Types.empty()) { |
| OS << "\t.local \t"; |
| printTypes(OS, Types); |
| } |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitEndFunc() { OS << "\t.endfunc\n"; } |
| |
| void WebAssemblyTargetAsmStreamer::emitSignature( |
| const wasm::WasmSignature *Sig) { |
| OS << "("; |
| emitParamList(Sig); |
| OS << ") -> ("; |
| emitReturnList(Sig); |
| OS << ")"; |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitParamList( |
| const wasm::WasmSignature *Sig) { |
| auto &Params = Sig->Params; |
| for (auto &Ty : Params) { |
| if (&Ty != &Params[0]) |
| OS << ", "; |
| OS << WebAssembly::typeToString(Ty); |
| } |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitReturnList( |
| const wasm::WasmSignature *Sig) { |
| auto &Returns = Sig->Returns; |
| for (auto &Ty : Returns) { |
| if (&Ty != &Returns[0]) |
| OS << ", "; |
| OS << WebAssembly::typeToString(Ty); |
| } |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitFunctionType(const MCSymbolWasm *Sym) { |
| assert(Sym->isFunction()); |
| OS << "\t.functype\t" << Sym->getName() << " "; |
| emitSignature(Sym->getSignature()); |
| OS << "\n"; |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitGlobalType(const MCSymbolWasm *Sym) { |
| assert(Sym->isGlobal()); |
| OS << "\t.globaltype\t" << Sym->getName() << ", " |
| << WebAssembly::typeToString( |
| static_cast<wasm::ValType>(Sym->getGlobalType().Type)) |
| << '\n'; |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitEventType(const MCSymbolWasm *Sym) { |
| assert(Sym->isEvent()); |
| OS << "\t.eventtype\t" << Sym->getName() << " "; |
| emitParamList(Sym->getSignature()); |
| OS << "\n"; |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitImportModule(const MCSymbolWasm *Sym, |
| StringRef ModuleName) { |
| OS << "\t.import_module\t" << Sym->getName() << ", " << ModuleName << '\n'; |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitIndIdx(const MCExpr *Value) { |
| OS << "\t.indidx \t" << *Value << '\n'; |
| } |
| |
| void WebAssemblyTargetWasmStreamer::emitLocal(ArrayRef<wasm::ValType> Types) { |
| SmallVector<std::pair<wasm::ValType, uint32_t>, 4> Grouped; |
| for (auto Type : Types) { |
| if (Grouped.empty() || Grouped.back().first != Type) |
| Grouped.push_back(std::make_pair(Type, 1)); |
| else |
| ++Grouped.back().second; |
| } |
| |
| Streamer.EmitULEB128IntValue(Grouped.size()); |
| for (auto Pair : Grouped) { |
| Streamer.EmitULEB128IntValue(Pair.second); |
| emitValueType(Pair.first); |
| } |
| } |
| |
| void WebAssemblyTargetWasmStreamer::emitEndFunc() { |
| llvm_unreachable(".end_func is not needed for direct wasm output"); |
| } |
| |
| void WebAssemblyTargetWasmStreamer::emitIndIdx(const MCExpr *Value) { |
| llvm_unreachable(".indidx encoding not yet implemented"); |
| } |