Some example https://godbolt.org/z/KKzhe8n38
define dso_local noundef i32 @f()
local_unnamed_addr #0 {
ret i32 42
}
define dso_local void @f(ptr dead_on_unwind noalias nocapture writable writeonly sret(%struct.S) align 4 %0)
local_unnamed_addr #0 {