[Bug middle-end/38474] compile time explosion in dataflow_set_preserve_mem_locs at -O3

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38474

--- Comment #86 from Richard Biener <rguenth at gcc dot gnu.org> ---
OK, so clobber handling was added as a fix for PR92038