http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45833
rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rsandifo at gcc dot gnu.org
--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org>
---
Same thing without a union:
struct v { int v[4]; } __attribute__ ((aligned (4 * sizeof (int))));
void
f (struct v *x, struct v *y, struct v *z)
{
for (int i = 0; i < 4; i++)
x->v[i] = y->v[i] + z->v[i];
}
produces (with -msee4.2):
leaq 16(%rsi), %rcx
leaq 16(%rdi), %rax
cmpq %rcx, %rdi
setae %r8b
cmpq %rsi, %rax
setbe %cl
orb %cl, %r8b
je .L5
leaq 16(%rdx), %rcx
cmpq %rcx, %rdi
setae %cl
cmpq %rdx, %rax
setbe %al
orb %al, %cl
je .L5
vmovdqa (%rsi), %xmm0
vpaddd (%rdx), %xmm0, %xmm0
vmovaps %xmm0, (%rdi)
ret
...
