https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89774
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Take your example and convert it into different functions:
float a(void)
{
return 2.0;
}
float b(float a)
{
return 2.0 * a;
}
double d(void)
{
return 3.0;
}
double e(double d)
{
return 3.0 * d;
}
double z(float a, double d)
{
return 2.0 * a + 3.0 * d;
}
---- CUT ----
a:
.LFB0:
.cfi_startproc
vmovss .LC0(%rip), %xmm0 ;;; load single
ret
b:
.LFB1:
.cfi_startproc
vaddss %xmm0, %xmm0, %xmm0 ;;; add single (same as a*2.0)
ret
d:
.LFB2:
.cfi_startproc
vmovsd .LC1(%rip), %xmm0 ;;; load double
ret
e:
.LFB3:
.cfi_startproc
vmulsd .LC1(%rip), %xmm0, %xmm0 ;;; multiple double
ret
z:
.LFB4:
.cfi_startproc
vmulsd .LC1(%rip), %xmm1, %xmm1 ;; multiple double
vcvtss2sd %xmm0, %xmm0, %xmm0 ;; convert single to double
vfmadd132sd .LC2(%rip), %xmm1, %xmm0 ;; multiple add double
ret
