[Bug rtl-optimization/122767] unstable register allocation: dependency on host word size

[aoliva at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122767

--- Comment #5 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Created attachment 62868
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62868&action=edit
incremental patch to test the above

Here's an incremental patch that helps test the above, going through all of the
variants (on suitable hosts) and checking that the hashed data is the same.