https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110762
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #5)
> (In reply to Richard Biener from comment #2)
> > The
> >
> > (insn 13 4 14 2 (set (reg:V2SF 20 xmm0 [orig:91 x2 ] [91])
> > (vec_select:V2SF (reg:V4SF 20 xmm0 [94])
> > (parallel [
> > (const_int 0 [0])
> > (const_int 1 [0x1])
> > ]))) "t.c":10:12 4394 {sse_storelps}
> > (nil))
> >
> > insns are gone in split after reload.
>
> Insns 13 and 14 are deleted by split2, yes. Although the very next insn
> (15) obviously uses the regs (20 and 21) those insns set?!
set_noop_p returns true for it ...
