https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78378
--- Comment #3 from Zdenek Sojka <zsojka at seznam dot cz> --- (In reply to Jakub Jelinek from comment #2) > r163380 still works, r163394 fails, so most likely one of r163383, r163384 > or r163389. r163383 added the four-insn combinations, and this is what happens in the testcase, if I understand the dump correctly.