[Bug c++/82899] *this in constructors could not alias with reference input parameters of the same type

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82899

--- Comment #20 from Marc Glisse <glisse at gcc dot gnu.org> ---
Created attachment 44122
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44122&action=edit
untested middle-end patch

This works on the testcase, I need to add a comment and run it through the
testsuite.