On Mon, Apr 17, 2017 at 10:20:28AM -0600, Jeff Law wrote:
> PR middle-end/80422
> * cfgcleanup.c (try_crossjump_to_edge): Verify SRC1 and SRC2 have
> predecessors after walking up the insn chain.
>
>
> PR middle-end/80422
> * gcc.c-torture/compile/pr80422.c: New test
A forwarder block becomes unreachable during cfg_cleanup. Later we're
cross jumping an indirect (via more forwarders) successor of the now
unreachable forwarder and walk up the CFG looking for hunks of
equivalent insns and walk back into the unreachable forwarder block. We
then want to look
