let (arg_val, arg_ty) = args.remove(0);
let layout = self.type_layout(arg_ty)?;
if let (&ty::TyTuple(fields, _), &Layout::Univariant { ref variant, .. }) = (&arg_ty.sty, layout) {
- let offsets = variant.offsets.iter().map(|s| s.bytes());
- if let Value::ByRef(ptr) = arg_val {
- for ((offset, ty), arg_local) in offsets.zip(fields).zip(arg_locals) {
- let arg = Value::ByRef(ptr.offset(offset));
- let dest = self.eval_lvalue(&mir::Lvalue::Local(arg_local))?;
- self.write_value(arg, dest, ty)?;
+ if self.frame().mir.args_iter().count() == fields.len() + 1 {
+ let offsets = variant.offsets.iter().map(|s| s.bytes());
+ if let Value::ByRef(ptr) = arg_val {
+ for ((offset, ty), arg_local) in offsets.zip(fields).zip(arg_locals) {
+ let arg = Value::ByRef(ptr.offset(offset));
+ let dest = self.eval_lvalue(&mir::Lvalue::Local(arg_local))?;
+ self.write_value(arg, dest, ty)?;
+ }
}
+ } else {
+ // called a manual impl of a rust-call function
+ let dest = self.eval_lvalue(&mir::Lvalue::Local(arg_locals.next().unwrap()))?;
+ self.write_value(arg_val, dest, arg_ty)?;
}
} else {
bug!("rust-call ABI tuple argument was {:?}, {:?}", arg_ty, layout);