[Bug rtl-optimization/63718] ARM Thumb1 bootstrap fail after fuse-caller-save info in cprop-hardreg

[joey.ye at arm dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63718

--- Comment #4 from Joey Ye <joey.ye at arm dot com> ---
Created attachment 33873
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33873&action=edit
Preprocessed testcase

Options to reproduce:
-march=armv4t -mthumb -O2