https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114985
--- Comment #10 from Aldy Hernandez <aldyh at gcc dot gnu.org> --- (In reply to David Edelsohn from comment #9) > The patch in comment 6 succeeds for me, but it seems more of a heavy-handed > band-aid that confirms the symptom, but covers up the problem. > > Something in GCC apparently has generated invalid IR that was not caught > earlier. GCC should not generate > > POINTER = POINTER CMP POINTER > > But the trunk should not be left in a broken state as per GCC development > policy. The broken trunk interferes with the work of other developers and > may mask other broken patches being committed. > > This patch should be reverted until the source of the problem is discovered > and fixed. The range request is not necessarily coming from the IR, but it is a request that the IPA pass is making of the ranger, which does adhere by gimple IR rules. So this may not be bad IR, but just a quirk of how IPA makes requests of the ranger. As such, I don't think it's heavy handed, but we do need the IPA experts to opine.
