[Bug d/96156] New: d: No RVO when returning struct literals initialized with constructor.

[ibuclaw at gdcproject dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96156

            Bug ID: 96156
           Summary: d: No RVO when returning struct literals initialized
                    with constructor.
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: d
          Assignee: ibuclaw at gdcproject dot org
          Reporter: ibuclaw at gdcproject dot org
  Target Milestone: ---

The address of 's' should become the 'this' pointer of the __ctor() call.

struct S66 {
    int x;
    __gshared void* ptr;
    @disable this(this);
    this(int x) { ptr = &this; this.x = x; }
}
auto f66() { return g66(); }
auto g66() { return h66(); }
auto h66() { return S66(100); }
void main()
{
    auto s = f66();
    assert(&s == S66.ptr);
}