[Bug d/113758] New: d: Callee destructor call invalidates the live object, not the temporary

[ibuclaw at gdcproject dot org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113758

            Bug ID: 113758
           Summary: d: Callee destructor call invalidates the live object,
                    not the temporary
           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: ---

D ABI does callee destruction of arguments, which depends on the argument
already being copied to a temporary before passing by ref.

At some point, the front-end stopped explicitly generating this temporary, so
now the code generator must take care of it.
---
struct Sdtor
{
    int field;
    ~this() { field = 0; }
}

void main()
{
    auto var = Sdtor(1);
    callee(var);
    assert(var.field == 1); // fails.
}

void callee(Sdtor param) { }