https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52345
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
For the trunk, they all come close (at least for aarch64):
f:
cmp w0, 0
cset w0, ne
orr w1, w0, w1
cmp w1, 0
cset w0, ne
ret
.size f, .-f
.align 2
.p2align 3,,7
.global f1
.type f1, %function
f1:
cmp w0, 0
ccmp w1, 0, 0, eq
cset w0, ne
ret
.size f1, .-f1
.align 2
.p2align 3,,7
.global f2
.type f2, %function
f2:
orr w0, w0, w1
cmp w0, 0
cset w0, ne
ret
f1 and f2 are similar enough for aarch64 (at least for ThunderX).
