[Bug rtl-optimization/88296] [9 Regression] Infinite loop in lra_split_hard_reg_for

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88296

--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
I cannot reproduce it w/ gcc-9.0.0-alpha20181216 snapshot (r267191), so it
either was fixed or went latent in the meantime.