[Bug sanitizer/116267] Sanitizer extremely slow

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116267

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
It probably has shared tree nodes from folding (or sanitizing) and needs a
hash-set to track visited.