[Bug rtl-optimization/78561] Constant pool size (offset) can become stale where constant pool entires become unused

[jgreenhalgh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78561

--- Comment #16 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
Created attachment 40267
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40267&action=edit
Proposed Patch

Would you mind testing the attached to see if it fixes your issue?

I've bootstrapped it on PowerPC myself without any problems, but that's not a
strong endorsement of the patch given that I've yet to reproduce your failure!