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! { dg-do run }
! { dg-options "-std=gnu" }
! Tests the fix for PR29786, in which initialization of overlapping
! equivalence elements caused a compile error.
!
! Contributed by Bernhard Fischer <aldot@gcc.gnu.org>
!
block data
common /global/ ca (4)
integer(4) ca, cb
equivalence (cb, ca(3))
data (ca(i), i = 1, 2) /42,43/, ca(4) /44/
data cb /99/
end block data
integer(4), parameter :: abcd = ichar ("a") + 256_4 * (ichar("b") + 256_4 * &
(ichar ("c") + 256_4 * ichar ("d")))
logical(4), parameter :: bigendian = transfer (abcd, "wxyz") .eq. "abcd"
call int4_int4
call real4_real4
call complex_real
call check_block_data
call derived_types ! Thanks to Tobias Burnus for this:)
!
! This came up in PR29786 comment #9 - Note the need to treat endianess
! Thanks Dominique d'Humieres:)
!
if (bigendian) then
if (d1mach_little (1) .ne. transfer ((/0_4, 1048576_4/), 1d0)) call abort ()
if (d1mach_little (2) .ne. transfer ((/-1_4,2146435071_4/), 1d0)) call abort ()
else
if (d1mach_big (1) .ne. transfer ((/1048576_4, 0_4/), 1d0)) call abort ()
if (d1mach_big (2) .ne. transfer ((/2146435071_4,-1_4/), 1d0)) call abort ()
end if
!
contains
subroutine int4_int4
integer(4) a(4)
integer(4) b
equivalence (b,a(3))
data b/3/
data (a(i), i=1,2) /1,2/, a(4) /4/
if (any (a .ne. (/1, 2, 3, 4/))) call abort ()
end subroutine int4_int4
subroutine real4_real4
real(4) a(4)
real(4) b
equivalence (b,a(3))
data b/3.0_4/
data (a(i), i=1,2) /1.0_4, 2.0_4/, &
a(4) /4.0_4/
if (sum (abs (a - &
(/1.0_4, 2.0_4, 3.0_4, 4.0_4/))) > 1.0e-6) call abort ()
end subroutine real4_real4
subroutine complex_real
complex(4) a(4)
real(4) b(2)
equivalence (b,a(3))
data b(1)/3.0_4/, b(2)/4.0_4/
data (a(i), i=1,2) /(0.0_4, 1.0_4),(2.0_4,0.0_4)/, &
a(4) /(0.0_4,5.0_4)/
if (sum (abs (a - (/(0.0_4, 1.0_4),(2.0_4, 0.0_4), &
(3.0_4, 4.0_4),(0.0_4, 5.0_4)/))) > 1.0e-6) call abort ()
end subroutine complex_real
subroutine check_block_data
common /global/ ca (4)
equivalence (ca(3), cb)
integer(4) ca
if (any (ca .ne. (/42, 43, 99, 44/))) call abort ()
end subroutine check_block_data
function d1mach_little(i) result(d1mach)
implicit none
double precision d1mach,dmach(5)
integer i
integer*4 large(4),small(4)
equivalence ( dmach(1), small(1) )
equivalence ( dmach(2), large(1) )
data small(1),small(2) / 0, 1048576/
data large(1),large(2) /-1,2146435071/
d1mach = dmach(i)
end function d1mach_little
function d1mach_big(i) result(d1mach)
implicit none
double precision d1mach,dmach(5)
integer i
integer*4 large(4),small(4)
equivalence ( dmach(1), small(1) )
equivalence ( dmach(2), large(1) )
data small(1),small(2) /1048576, 0/
data large(1),large(2) /2146435071,-1/
d1mach = dmach(i)
end function d1mach_big
subroutine derived_types
TYPE T1
sequence
character (3) :: chr
integer :: i = 1
integer :: j
END TYPE T1
TYPE T2
sequence
character (3) :: chr = "wxy"
integer :: i = 1
integer :: j = 4
END TYPE T2
TYPE(T1) :: a1
TYPE(T2) :: a2
EQUIVALENCE(a1,a2) ! { dg-warning="mixed|components" }
if (a1%chr .ne. "wxy") call abort ()
if (a1%i .ne. 1) call abort ()
if (a1%j .ne. 4) call abort ()
end subroutine derived_types
end
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