[embedded] Don't apply 'nounwind' if C++ interop is enabled

Author: kubamracek

lib/IRGen/IRGenModule.cpp

@@ -1445,7 +1445,8 @@ void IRGenModule::constructInitialFnAttributes(
     Attrs.addAttribute("stack-protector-buffer-size", llvm::utostr(8));
   }
 
-  if (Context.LangOpts.hasFeature(Feature::Embedded)) {
+  if (Context.LangOpts.hasFeature(Feature::Embedded) &&
+      !Context.LangOpts.EnableCXXInterop) {
     Attrs.addAttribute(llvm::Attribute::NoUnwind);
   }
 }

lib/IRGen/IRGenSIL.cpp

@@ -1846,7 +1846,8 @@ IRGenSILFunction::IRGenSILFunction(IRGenModule &IGM, SILFunction *f)
     CurFn->addFnAttr(llvm::Attribute::NoInline);
   }
 
-  if (IGM.Context.LangOpts.hasFeature(Feature::Embedded)) {
+  if (IGM.Context.LangOpts.hasFeature(Feature::Embedded) &&
+      !IGM.Context.LangOpts.EnableCXXInterop) {
     CurFn->addFnAttr(llvm::Attribute::NoUnwind);
   }