On Tue, Sep 30, 2014 at 6:51 PM, Richard Earnshaw wrote: > It's not just clobbers; it ignores patterns like > > (parallel > [(set (a) (...) > (set (b) (...)]) > [(reg_note (reg_unused(b))] > > Which is probably fine before register allocation but definitely > something you have to think about afterwards.
Even before RA this isn't always fine. We have checks for !multiple_sets for this. Ciao! Steven
