On Thu, Jan 24, 2019 at 03:36:46PM +0000, Wilco Dijkstra wrote: > The TST instruction no longer matches in all cases due to changes in > Combine. The fix is simple, we now need to allow a subreg as well when > selecting the cc_mode.
You needed to before, it just wasn't as obvious yet. It now is exposed in the simplest testcases (hard regs, as you used to have from function arguments here, can be referred to in any mode, without subreg). Segher
