[Bug target/66785] internal compiler error in record_operand_use

[wilson at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66785

--- Comment #3 from Jim Wilson <wilson at gcc dot gnu.org> ---
Created attachment 36705
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36705&action=edit
untested patch that may be wasting memory