[Bug rtl-optimization/97535] [9/10/11 Regression] On AArch64 memcpy expansion cannot handle length > 32-bit signed int max

[tnfchris at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97535

--- Comment #4 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Yeah, the overflow in the signed type is causing the number of instructions
guard to fail.

I'll submit a patch.