https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115528
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot
gnu.org
Keywords|needs-reduction |
Status|WAITING |ASSIGNED
--- Comment #21 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. We're vectorizing the outer loop here
do i = 1,4
do j = 1,4
HADCUR(I)=
$ HADCUR(I)+CMPLX(COEF1)*FORM1*AA(I,J)*(PP(K,J)-PP(4,J))
end do
end do
and the issue is we're doing
=> 0x00000000006b7218 <+2504>: movapd 0x0(%r13),%xmm1
on
(gdb) p/x $r13
$2 = 0x7fffffffb5d8
which is an unaligned address. This is the access to AA.
The following reproduces the issue with -O2 -fno-inline:
subroutine init(COEF1,FORM1,AA)
double precision COEF1,X
double complex FORM1
double precision AA(4,4)
COEF1=0
FORM1=0
AA=0
end
subroutine curr(HADCUR)
double precision COEF1
double complex HADCUR(4),FORM1
double precision AA(4,4)
call init(COEF1,FORM1,AA)
do i = 1,4
do j = 1,4
HADCUR(I)=
$ HADCUR(I)+CMPLX(COEF1)*FORM1*AA(I,J)
end do
end do
end
program test
double complex HADCUR(4)
hadcur=0
call curr(hadcur)
end
