https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64477
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization, ra
Priority|P3 |P2
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
We end up with
(note 5 1 2 2 [bb 2] NOTE_INSN_BASIC_BLOCK)
(insn 2 5 4 2 (set (mem/c:SI (plus:DI (reg/f:DI 7 sp)
(const_int -12 [0xfffffffffffffff4])) [1 %sfp+-4 S4 A32])
(reg:SI 5 di [ a ])) t.c:3 90 {*movsi_internal}
(nil))
(note 4 2 8 2 NOTE_INSN_FUNCTION_BEG)
(insn 8 4 9 2 (set (reg:V4SI 21 xmm0 [95])
(vec_merge:V4SI (vec_duplicate:V4SI (mem/c:SI (plus:DI (reg/f:DI 7 sp)
(const_int -12 [0xfffffffffffffff4])) [1 %sfp+-4 S4
A32]))
(const_vector:V4SI [
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
(const_int 0 [0])
])
(const_int 1 [0x1]))) t.c:4 2460 {vec_setv4si_0}
(nil))
after reload as it seems vec_setv4si_0 doesn't allow a di reg operand?
Choosing alt 2 in insn 8: (0) v (1) C (2) m {vec_setv4si_0}
0 Non-pseudo reload: reject+=2
0 Non input pseudo reload: reject++
alt=0,overall=609,losers=1,rld_nregs=1
alt=1,overall=0,losers=0,rld_nregs=0
Choosing alt 1 in insn 2: (0) m (1) re {*movsi_internal}
Spilling non-eliminable hard regs: 7
