+static int fillCommandLineSymbols(MCAsmParser &Parser){
+ for(auto &I: DefineSymbol){
+ auto Pair = StringRef(I).split('=');
+ if(Pair.second.empty()){
+ errs() << "error: defsym must be of the form: sym=value: " << I;
+ return 1;
+ }
+ int64_t Value;
+ if(Pair.second.getAsInteger(0, Value)){
+ errs() << "error: Value is not an integer: " << Pair.second;
+ return 1;
+ }
+ auto &Context = Parser.getContext();
+ auto Symbol = Context.getOrCreateSymbol(Pair.first);
+ Parser.getStreamer().EmitAssignment(Symbol,
+ MCConstantExpr::create(Value, Context));
+ }
+ return 0;
+}
+
+static int AssembleInput(const char *ProgName, const Target *TheTarget,
+ SourceMgr &SrcMgr, MCContext &Ctx, MCStreamer &Str,
+ MCAsmInfo &MAI, MCSubtargetInfo &STI,
+ MCInstrInfo &MCII, MCTargetOptions &MCOptions) {
+ std::unique_ptr<MCAsmParser> Parser(
+ createMCAsmParser(SrcMgr, Ctx, Str, MAI));
+ std::unique_ptr<MCTargetAsmParser> TAP(
+ TheTarget->createMCAsmParser(STI, *Parser, MCII, MCOptions));
+
+ if (!TAP) {
+ errs() << ProgName
+ << ": error: this target does not support assembly parsing.\n";
+ return 1;
+ }
+
+ int SymbolResult = fillCommandLineSymbols(*Parser);
+ if(SymbolResult)
+ return SymbolResult;
+ Parser->setShowParsedOperands(ShowInstOperands);
+ Parser->setTargetParser(*TAP);
+
+ int Res = Parser->Run(NoInitialTextSection);
+
+ return Res;
+}
+
+int main(int argc, char **argv) {
+ // Print a stack trace if we signal out.
+ sys::PrintStackTraceOnErrorSignal();
+ PrettyStackTraceProgram X(argc, argv);
+ llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+
+ // Initialize targets and assembly printers/parsers.
+ llvm::InitializeAllTargetInfos();
+ llvm::InitializeAllTargetMCs();
+ llvm::InitializeAllAsmParsers();
+ llvm::InitializeAllDisassemblers();
+
+ // Register the target printer for --version.
+ cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
+
+ cl::ParseCommandLineOptions(argc, argv, "llvm machine code playground\n");
+ MCTargetOptions MCOptions = InitMCTargetOptionsFromFlags();
+ TripleName = Triple::normalize(TripleName);
+ setDwarfDebugFlags(argc, argv);
+
+ setDwarfDebugProducer();
+
+ const char *ProgName = argv[0];