https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68240
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- Starting iteration 95064 Value numbering iftmp.1_2 stmt = iftmp.1_2 = PHI <1(3), 0(4)> Setting value number of iftmp.1_2 to iftmp.0_1 (changed) Starting iteration 95065 Value numbering iftmp.1_2 stmt = iftmp.1_2 = PHI <1(3), 0(4)> Setting value number of iftmp.1_2 to 1 (changed) Starting iteration 95066 Value numbering iftmp.1_2 stmt = iftmp.1_2 = PHI <1(3), 0(4)> Setting value number of iftmp.1_2 to iftmp.0_1 (changed) Starting iteration 95067 Value numbering iftmp.1_2 stmt = iftmp.1_2 = PHI <1(3), 0(4)> Setting value number of iftmp.1_2 to 1 (changed) ... (oops)
