[Bug rtl-optimization/97497] gcse wrong code generation with partial register clobbers

[krebbel at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97497

--- Comment #1 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Created attachment 49402
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49402&action=edit
Proposed fix

With the patch only regs are considered which aren't "fixed" assuming that for
fixed_regs the backend takes care of only actually using the well-defined part
of the hard regs.