```zig
export fn entry() void {
    var x: Foo = foo();
}
```

```llvm
define void @entry() #2 !dbg !37 {
Entry:
  %x = alloca %Foo, align 4
  call fastcc void @foo(%Foo* sret %x), !dbg !48
  call void @llvm.dbg.declare(metadata %Foo* %x, metadata !41, metadata !DIExpression()), !dbg !49
  ret void, !dbg !50
}
```