[PATCH] D45653: [X86] Enable sibling-call optimization for functions returning structs

[Dávid Bolvanský via Phabricator via llvm-commits]

xbolva00 added a comment.

We should not abandon it. It seems we can optimize this case

struct MyStruct {

  int arr[64];

};

void struct_by_value(MyStruct s);

void call_struct_by_value(int i, MyStruct s) {

  struct_by_value(s);

}

https://godbolt.org/z/lxOq6B (GGC does it)


https://reviews.llvm.org/D45653