https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92537
Bug ID: 92537
Summary: [10 Regression] internal compiler error: in
vect_slp_analyze_node_operations, at
tree-vect-slp.c:2775
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: anlauf at gcc dot gnu.org
Target Milestone: ---
This is a recent regression occurring with Fortran code. If it is a FE issue,
feel free to re-categorize.
The two modules below need to be compiled separately and with options
-O2 -march=skylake -ftree-vectorize
(or for any other modern x86_64 processor), to get:
during GIMPLE pass: slp
mod2.f90:5:0:
5 | subroutine foo (pr)
|
internal compiler error: in vect_slp_analyze_node_operations, at
tree-vect-slp.c:2775
0xfc2c6b vect_slp_analyze_node_operations
../../trunk/gcc/tree-vect-slp.c:2775
0xfc341a vect_slp_analyze_operations(vec_info*)
../../trunk/gcc/tree-vect-slp.c:2862
0xfc902f vect_slp_analyze_bb_1
../../trunk/gcc/tree-vect-slp.c:3199
0xfc902f vect_slp_bb_region
../../trunk/gcc/tree-vect-slp.c:3260
0xfc902f vect_slp_bb(basic_block_def*)
../../trunk/gcc/tree-vect-slp.c:3395
0xfcbd7a execute
../../trunk/gcc/tree-vectorizer.c:1320
% cat mod1.f90
module mod1
implicit none
integer, parameter :: wp = kind (1.d0)
interface p_min
module procedure p_min_wp
end interface
contains
function p_min_wp (x) result (p_min)
real(wp), intent(in) :: x
real(wp) :: p_min
p_min = x
end function p_min_wp
end module mod1
% cat mod2.f90
MODULE mod2
use mod1, only: p_min, wp
implicit none
contains
subroutine foo (pr)
real(wp), pointer :: pr(:)
integer :: nzd
real(wp) :: pmin
real(wp) :: pmin_diag
integer :: i
nzd = 15
allocate (pr(nzd))
pmin_diag = 4000._wp
pmin = p_min(pmin_diag)
pmin = min (pmin,pmin_diag)
pr(1) = log(pmin)
do i=1,nzd-1
pr(i+1) = log(pmin) + i
end do
end subroutine foo
end module mod2
Compilation passes e.g. with -O1, -fno-tree-vectorize, changing 1.d0 to 1.0,
changing the loop bounds, or several other minor variations of the code.
