[Bug tree-optimization/95863] Failure to detect table-based ctz implementation

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95863

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 48790
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48790&action=edit
A patch