https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66790
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |WAITING Last reconfirmed| |2015-07-29 Ever confirmed|0 |1 --- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> --- So what is the issue with replacing zero-extending an uninitialized %ebp with a random other value? Both are essentially undefined when reached via the somlabel bypass. Is the real issue happening in a downstream pass? I don't think REE does anything wrong here.