On Thu, Apr 15, 2021 at 07:11:11PM +0100, Richard Sandiford wrote:
> Jakub Jelinek writes:
> > --- gcc/config/aarch64/aarch64.md.jj2021-04-15 10:45:02.798853095
> > +0200
> > +++ gcc/config/aarch64/aarch64.md 2021-04-15 13:28:04.734754364 +0200
> > @@ -3572,6 +3572,18 @@ (define_insn "*
Jakub Jelinek writes:
> --- gcc/config/aarch64/aarch64.md.jj 2021-04-15 10:45:02.798853095 +0200
> +++ gcc/config/aarch64/aarch64.md 2021-04-15 13:28:04.734754364 +0200
> @@ -3572,6 +3572,18 @@ (define_insn "*neg__si2_uxtw"
>[(set_attr "autodetect_type" "alu_shift__op2")]
> )
>
> +(def
Hi!
The testcase used to be compiled at -O2 by GCC8 and earlier to:
f1:
neg w1, w0, asr 16
and w1, w1, 65535
orr w0, w1, w0, lsl 16
ret
f2:
neg w1, w0
extrw0, w1, w0, 16
ret
but since GCC9 (r9-3594 for f1 and r9-6926 for f
