1! { dg-do run }
2! { dg-options "-std=gnu" }
3! Tests the fix for PR29786, in which initialization of overlapping
4! equivalence elements caused a compile error.
5!
6! Contributed by Bernhard Fischer <aldot@gcc.gnu.org>
7!
8block data
9  common /global/ ca (4)
10  integer(4) ca, cb
11  equivalence (cb, ca(3))
12  data (ca(i), i = 1, 2) /42,43/, ca(4) /44/
13  data cb /99/
14end block data
15
16  integer(4), parameter :: abcd = ichar ("a") + 256_4 * (ichar("b") + 256_4 * &
17                                 (ichar ("c") + 256_4 * ichar ("d")))
18  logical(4), parameter :: bigendian = transfer (abcd, "wxyz") .eq. "abcd"
19
20  call int4_int4
21  call real4_real4
22  call complex_real
23  call check_block_data
24  call derived_types         ! Thanks to Tobias Burnus for this:)
25!
26! This came up in PR29786 comment #9 - Note the need to treat endianess
27! Thanks Dominique d'Humieres:)
28!
29  if (bigendian) then
30    if (d1mach_little (1) .ne. transfer ((/0_4, 1048576_4/), 1d0)) call abort ()
31    if (d1mach_little (2) .ne. transfer ((/-1_4,2146435071_4/), 1d0)) call abort ()
32  else
33    if (d1mach_big (1) .ne. transfer ((/1048576_4, 0_4/), 1d0)) call abort ()
34    if (d1mach_big (2) .ne. transfer ((/2146435071_4,-1_4/), 1d0)) call abort ()
35  end if
36!
37contains
38  subroutine int4_int4
39      integer(4)         a(4)
40      integer(4)         b
41      equivalence (b,a(3))
42      data b/3/
43      data (a(i), i=1,2) /1,2/, a(4) /4/
44      if (any (a .ne. (/1, 2, 3, 4/))) call abort ()
45  end subroutine int4_int4
46  subroutine real4_real4
47      real(4)         a(4)
48      real(4)         b
49      equivalence (b,a(3))
50      data b/3.0_4/
51      data (a(i), i=1,2) /1.0_4, 2.0_4/, &
52            a(4) /4.0_4/
53      if (sum (abs (a -  &
54          (/1.0_4, 2.0_4, 3.0_4, 4.0_4/))) > 1.0e-6) call abort ()
55  end subroutine real4_real4
56  subroutine complex_real
57      complex(4)         a(4)
58      real(4)            b(2)
59      equivalence (b,a(3))
60      data b(1)/3.0_4/, b(2)/4.0_4/
61      data (a(i), i=1,2) /(0.0_4, 1.0_4),(2.0_4,0.0_4)/, &
62            a(4) /(0.0_4,5.0_4)/
63      if (sum (abs (a - (/(0.0_4, 1.0_4),(2.0_4, 0.0_4), &
64          (3.0_4, 4.0_4),(0.0_4, 5.0_4)/)))  > 1.0e-6) call abort ()
65  end subroutine complex_real
66  subroutine check_block_data
67      common /global/ ca (4)
68      equivalence (ca(3), cb)
69      integer(4) ca
70      if (any (ca .ne. (/42, 43, 99, 44/))) call abort ()
71  end subroutine check_block_data
72  function d1mach_little(i) result(d1mach)
73    implicit none
74    double precision d1mach,dmach(5)
75    integer i
76    integer*4 large(4),small(4)
77    equivalence ( dmach(1), small(1) )
78    equivalence ( dmach(2), large(1) )
79    data small(1),small(2) / 0,   1048576/
80    data large(1),large(2) /-1,2146435071/
81    d1mach = dmach(i)
82  end function d1mach_little
83  function d1mach_big(i) result(d1mach)
84    implicit none
85    double precision d1mach,dmach(5)
86    integer i
87    integer*4 large(4),small(4)
88    equivalence ( dmach(1), small(1) )
89    equivalence ( dmach(2), large(1) )
90    data small(1),small(2) /1048576,    0/
91    data large(1),large(2) /2146435071,-1/
92    d1mach = dmach(i)
93  end function d1mach_big
94    subroutine derived_types
95      TYPE T1
96        sequence
97        character (3) :: chr
98        integer :: i = 1
99        integer :: j
100        END TYPE T1
101      TYPE T2
102        sequence
103        character (3) :: chr = "wxy"
104        integer :: i = 1
105        integer :: j = 4
106      END TYPE T2
107      TYPE(T1) :: a1
108      TYPE(T2) :: a2
109      EQUIVALENCE(a1,a2)         ! { dg-warning="mixed|components" }
110      if (a1%chr .ne. "wxy") call abort ()
111      if (a1%i .ne. 1) call abort ()
112      if (a1%j .ne. 4) call abort ()
113      end subroutine derived_types
114end
115