[Bug target/88529] G++ clears the return register on x86_64 when returning an empty class

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88529

Jason Merrill <jason at gcc dot gnu.org> changed:

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                 CC|                            |jason at gcc dot gnu.org

--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Created attachment 45899
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45899&action=edit
Fix

Here's a fix.  I'm not sure if it's suitable for GCC 9 or 10.