[Bug tree-optimization/109950] can array subscripts be assumed to be non-negative?

[lh_mouse at 126 dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109950

--- Comment #2 from LIU Hao <lh_mouse at 126 dot com> ---
(In reply to Alexander Monakov from comment #1)
> That's the REX prefix, not an operand size override prefix. It doesn't cause
> a decoding stall.

Thanks for pointing this out. Thought it was 66H.