https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103750
Hongtao Liu <liuhongt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
CC| |liuhongt at gcc dot gnu.org
--- Comment #19 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
Looks like it's fixed by r16-170-ga670ebde399548.
Now it generates decent code as
"_Z8qustrchrPDsS_Ds":
cmp rdi, rsi
jnb .L7
vpbroadcastw ymm0, edx
.L4:
vpcmpeqw k1, ymm0, YMMWORD PTR [rdi]
vpcmpeqw k0, ymm0, YMMWORD PTR [rdi+32]
kortestw k1, k0
je .L10
kortestw k1, k1
je .L5
kmovw eax, k1
tzcnt eax, eax
lea rax, [rdi+rax*2]
vzeroupper
ret
.L5:
kmovw eax, k0
tzcnt ax, ax
add rdi, 32
movzx eax, ax
lea rax, [rdi+rax*2]
vzeroupper
ret
.L10:
add rdi, 64
cmp rdi, rsi
jb .L4
mov rax, rsi
vzeroupper
ret
.L7:
mov rax, rsi
ret
