[embedded] In -emit-empty-object-file mode, don't emit autolink entries

Author: kubamracek

lib/IRGen/IRGenModule.cpp

@@ -1865,6 +1865,11 @@ static llvm::GlobalObject *createForceImportThunk(IRGenModule &IGM) {
 }
 
 void IRGenModule::emitAutolinkInfo() {
+  if (getSILModule().getOptions().StopOptimizationAfterSerialization) {
+    // We're asked to emit an empty IR module
+    return;
+  }
+
   auto Autolink =
       AutolinkKind::create(TargetInfo, Triple, IRGen.Opts.LLVMLTOKind);