https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100701
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2021-05-20
Target| |x86_64-*-* i?86-*-*
Status|UNCONFIRMED |NEW
Component|rtl-optimization |target
CC| |uros at gcc dot gnu.org
Target Milestone|--- |12.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
orq %rdi, %rsi
pshuflw $0, %xmm3, %xmm0
movq %xmm0, %rbp
and %rbx, %rbp
je .L4
Confirmed. Somehow the mmx_andv8qi3 doesn't clobber CC:
(insn 19 88 15 2 (parallel [
(set (reg:CCZ 17 flags)
(compare:CCZ (ior:DI (reg:DI 4 si [158])
(reg:DI 5 di [orig:101 i ] [101]))
(const_int 0 [0])))
(clobber (reg:DI 4 si [158]))
]) "t.c":13:6 562 {*iordi_3}
(expr_list:REG_DEAD (reg:DI 4 si [158])
(expr_list:REG_UNUSED (reg:DI 4 si [158])
(nil))))
(insn:TI 15 19 89 2 (set (reg:V4HI 20 xmm0 [106])
(vec_duplicate:V4HI (truncate:HI (reg:SI 23 xmm3 [162])))) "t.c":12:5
1459 {*vec_dupv4hi}
(expr_list:REG_DEAD (reg:SI 23 xmm3 [162])
(nil)))
(insn:TI 89 15 17 2 (set (reg/v:V8QI 6 bp [orig:95 a ] [95])
(reg:V8QI 20 xmm0 [106])) "t.c":12:5 1302 {*movv8qi_internal}
(expr_list:REG_DEAD (reg:V8QI 20 xmm0 [106])
(nil)))
(insn:TI 17 89 20 2 (set (reg/v:V8QI 6 bp [orig:95 a ] [95])
(and:V8QI (reg/v:V8QI 6 bp [orig:95 a ] [95])
(reg/v:V8QI 3 bx [orig:98 a ] [98]))) "t.c":12:5 1422
{*mmx_andv8qi3}
(nil))
(jump_insn 20 17 25 2 (set (pc)
(if_then_else (eq (reg:CCZ 17 flags)
(const_int 0 [0]))
(label_ref:DI 113)
(pc))) "t.c":13:6 822 {*jcc}
(expr_list:REG_DEAD (reg:CCZ 17 flags)
(int_list:REG_BR_PROB 7 (nil)))
