https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103342
Bug ID: 103342
Summary: [OPENMP]Missing barrier for linear clause within loop
simd construct which not directly contained by
parrellel construct
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: xiao....@compiler-dev.com
Target Milestone: ---
The test case is,
program p
integer, parameter :: N = 10000
integer :: a(N)
integer :: i, j
j = 0
!$omp parallel do simd linear(j: 2)
do i = 1, N
a(i) = a(i) + j
j = j + 2
enddo
j = 0
!$omp parallel
call subr(a)
!$omp end parallel
contains
subroutine subr(x)
integer :: x(N)
!$omp do simd linear(j: 2)
do i = 1, N
x(i) = x(i) + j
j = j + 2
enddo
end subroutine
end program
After complier with,
gfortran-10 test.f90 -fopenmp -fdump-tree-all
In the file test.f90.007t.omplower, I found "builtin_GOMP_barrier" in "p", but
none in "subr".
And when I convert to C-style testcase, found "builtin_GOMP_barrier" in both.
Except the missing of barrier, there is an ICE for gfortran when removed "simd"
in "subr".
