[Bug target/121866] GCC unable to eliminate loop guard in some cases for riscv32

[lis8215 at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121866

--- Comment #2 from Siarhei Volkau <lis8215 at gmail dot com> ---
It looks like only 32-bit targets are affected, might be related to pointer
size.

https://godbolt.org/z/z1WdPrWc1