| //==-- 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<MVT> Types) { |
| bool First = true; |
| for (MVT Type : Types) { |
| if (First) |
| First = false; |
| else |
| OS << ", "; |
| OS << WebAssembly::TypeToString(Type); |
| } |
| OS << '\n'; |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitParam(MCSymbol *Symbol, |
| ArrayRef<MVT> Types) { |
| if (!Types.empty()) { |
| OS << "\t.param \t"; |
| |
| // FIXME: Currently this applies to the "current" function; it may |
| // be cleaner to specify an explicit symbol as part of the directive. |
| |
| PrintTypes(OS, Types); |
| } |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitResult(MCSymbol *Symbol, |
| ArrayRef<MVT> Types) { |
| if (!Types.empty()) { |
| OS << "\t.result \t"; |
| |
| // FIXME: Currently this applies to the "current" function; it may |
| // be cleaner to specify an explicit symbol as part of the directive. |
| |
| PrintTypes(OS, Types); |
| } |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitLocal(ArrayRef<MVT> Types) { |
| if (!Types.empty()) { |
| OS << "\t.local \t"; |
| PrintTypes(OS, Types); |
| } |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitEndFunc() { OS << "\t.endfunc\n"; } |
| |
| void WebAssemblyTargetAsmStreamer::emitIndirectFunctionType( |
| MCSymbol *Symbol, SmallVectorImpl<MVT> &Params, SmallVectorImpl<MVT> &Results) { |
| OS << "\t.functype\t" << Symbol->getName(); |
| if (Results.empty()) |
| OS << ", void"; |
| else { |
| assert(Results.size() == 1); |
| OS << ", " << WebAssembly::TypeToString(Results.front()); |
| } |
| for (auto Ty : Params) |
| OS << ", " << WebAssembly::TypeToString(Ty); |
| OS << '\n'; |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitGlobalImport(StringRef name) { |
| OS << "\t.import_global\t" << name << '\n'; |
| } |
| |
| void WebAssemblyTargetAsmStreamer::emitImportModule(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::emitParam(MCSymbol *Symbol, |
| ArrayRef<MVT> Types) { |
| SmallVector<wasm::ValType, 4> Params; |
| for (MVT Ty : Types) |
| Params.push_back(WebAssembly::toValType(Ty)); |
| |
| cast<MCSymbolWasm>(Symbol)->setParams(std::move(Params)); |
| } |
| |
| void WebAssemblyTargetWasmStreamer::emitResult(MCSymbol *Symbol, |
| ArrayRef<MVT> Types) { |
| SmallVector<wasm::ValType, 4> Returns; |
| for (MVT Ty : Types) |
| Returns.push_back(WebAssembly::toValType(Ty)); |
| |
| cast<MCSymbolWasm>(Symbol)->setReturns(std::move(Returns)); |
| } |
| |
| void WebAssemblyTargetWasmStreamer::emitLocal(ArrayRef<MVT> Types) { |
| SmallVector<std::pair<MVT, uint32_t>, 4> Grouped; |
| for (MVT 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(WebAssembly::toValType(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"); |
| } |
| |
| void WebAssemblyTargetWasmStreamer::emitIndirectFunctionType( |
| MCSymbol *Symbol, SmallVectorImpl<MVT> &Params, |
| SmallVectorImpl<MVT> &Results) { |
| MCSymbolWasm *WasmSym = cast<MCSymbolWasm>(Symbol); |
| if (WasmSym->isFunction()) { |
| // Symbol already has its arguments and result set. |
| return; |
| } |
| |
| SmallVector<wasm::ValType, 4> ValParams; |
| for (MVT Ty : Params) |
| ValParams.push_back(WebAssembly::toValType(Ty)); |
| |
| SmallVector<wasm::ValType, 1> ValResults; |
| for (MVT Ty : Results) |
| ValResults.push_back(WebAssembly::toValType(Ty)); |
| |
| WasmSym->setParams(std::move(ValParams)); |
| WasmSym->setReturns(std::move(ValResults)); |
| WasmSym->setType(wasm::WASM_SYMBOL_TYPE_FUNCTION); |
| } |
| |
| void WebAssemblyTargetWasmStreamer::emitGlobalImport(StringRef name) { |
| llvm_unreachable(".global_import is not needed for direct wasm output"); |
| } |
| |
| void WebAssemblyTargetWasmStreamer::emitImportModule(MCSymbolWasm *Sym, |
| StringRef ModuleName) { |
| Sym->setModuleName(ModuleName); |
| } |