This fails with
$ gfortran -O3 -funroll-loops elemental.f90
$ ./a.out
Aborted
Slightly reduced:
$ cat elemental-reduced.f90
! Program to test elemental functions.
program test_elemental
implicit none
integer(kind = 4), dimension (2, 4) :: a
integer(kind = 4), dimension (2, 4) :: b
integer(kind = 8), dimension(2) :: c
a = reshape ((/2, 3, 4, 5, 6, 7, 8, 9/), (/2, 4/))
b = 0
b(2, :) = e_fn (a(1, :), 1)
if (any (b .ne. reshape ((/0, 1, 0, 3, 0, 5, 0, 7/), (/2, 4/)))) call abort
a = e_fn (a(:, 4:1:-1), 1 + b)
print '(8I4)',a
if (any (a .ne. reshape ((/7, 7, 5, 3, 3, -1, 1, -5/), (/2, 4/)))) call abort
contains
elemental integer function e_fn (p, q)
integer, intent(in) :: p, q
e_fn = p - q
end function
end program
$ cat elemental-reduced.f90
! Program to test elemental functions.
program test_elemental
implicit none
integer(kind = 4), dimension (2, 4) :: a
integer(kind = 4), dimension (2, 4) :: b
integer(kind = 8), dimension(2) :: c
a = reshape ((/2, 3, 4, 5, 6, 7, 8, 9/), (/2, 4/))
b = 0
b(2, :) = e_fn (a(1, :), 1)
if (any (b .ne. reshape ((/0, 1, 0, 3, 0, 5, 0, 7/), (/2, 4/)))) call abort
a = e_fn (a(:, 4:1:-1), 1 + b)
print '(8I4)',a
if (any (a .ne. reshape ((/7, 7, 5, 3, 3, -1, 1, -5/), (/2, 4/)))) call abort
contains
elemental integer function e_fn (p, q)
integer, intent(in) :: p, q
e_fn = p - q
end function
end program
$ gfortran elemental-reduced.f90 && ./a.out
7 7 5 3 3 -1 1 -5
$ gfortran -O3 elemental-reduced.f90 && ./a.out
7 7 5 3 3 -1 1 -5
$ gfortran -O3 -funroll-loops elemental-reduced.f90 && ./a.out
7 7 5 3 4 -3 6 -1
Aborted
--
Summary: [4.1 regression] elemental.f90 testsuite failure
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P2
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tkoenig at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509
