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111
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1 ! { dg-do run }
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2 ! { dg-options "-std=gnu" }
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3 ! Tests the fix for PR29786, in which initialization of overlapping
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4 ! equivalence elements caused a compile error.
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5 !
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6 ! Contributed by Bernhard Fischer <aldot@gcc.gnu.org>
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7 !
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8 block data
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9 common /global/ ca (4)
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10 integer(4) ca, cb
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11 equivalence (cb, ca(3))
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12 data (ca(i), i = 1, 2) /42,43/, ca(4) /44/
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13 data cb /99/
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14 end block data
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15
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16 integer(4), parameter :: abcd = ichar ("a") + 256_4 * (ichar("b") + 256_4 * &
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17 (ichar ("c") + 256_4 * ichar ("d")))
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18 logical(4), parameter :: bigendian = transfer (abcd, "wxyz") .eq. "abcd"
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19
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20 call int4_int4
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21 call real4_real4
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22 call complex_real
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23 call check_block_data
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24 call derived_types ! Thanks to Tobias Burnus for this:)
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25 !
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26 ! This came up in PR29786 comment #9 - Note the need to treat endianess
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27 ! Thanks Dominique d'Humieres:)
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28 !
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29 if (bigendian) then
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131
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30 if (d1mach_little (1) .ne. transfer ((/0_4, 1048576_4/), 1d0)) STOP 1
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31 if (d1mach_little (2) .ne. transfer ((/-1_4,2146435071_4/), 1d0)) STOP 2
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111
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32 else
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131
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33 if (d1mach_big (1) .ne. transfer ((/1048576_4, 0_4/), 1d0)) STOP 3
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34 if (d1mach_big (2) .ne. transfer ((/2146435071_4,-1_4/), 1d0)) STOP 4
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111
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35 end if
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36 !
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37 contains
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38 subroutine int4_int4
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39 integer(4) a(4)
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40 integer(4) b
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41 equivalence (b,a(3))
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42 data b/3/
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43 data (a(i), i=1,2) /1,2/, a(4) /4/
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131
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44 if (any (a .ne. (/1, 2, 3, 4/))) STOP 5
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111
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45 end subroutine int4_int4
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46 subroutine real4_real4
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47 real(4) a(4)
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48 real(4) b
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49 equivalence (b,a(3))
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50 data b/3.0_4/
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51 data (a(i), i=1,2) /1.0_4, 2.0_4/, &
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52 a(4) /4.0_4/
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53 if (sum (abs (a - &
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131
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54 (/1.0_4, 2.0_4, 3.0_4, 4.0_4/))) > 1.0e-6) STOP 6
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111
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55 end subroutine real4_real4
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56 subroutine complex_real
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57 complex(4) a(4)
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58 real(4) b(2)
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59 equivalence (b,a(3))
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60 data b(1)/3.0_4/, b(2)/4.0_4/
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61 data (a(i), i=1,2) /(0.0_4, 1.0_4),(2.0_4,0.0_4)/, &
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62 a(4) /(0.0_4,5.0_4)/
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63 if (sum (abs (a - (/(0.0_4, 1.0_4),(2.0_4, 0.0_4), &
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131
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64 (3.0_4, 4.0_4),(0.0_4, 5.0_4)/))) > 1.0e-6) STOP 7
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111
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65 end subroutine complex_real
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66 subroutine check_block_data
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67 common /global/ ca (4)
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68 equivalence (ca(3), cb)
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69 integer(4) ca
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131
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70 if (any (ca .ne. (/42, 43, 99, 44/))) STOP 8
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111
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71 end subroutine check_block_data
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72 function d1mach_little(i) result(d1mach)
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73 implicit none
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74 double precision d1mach,dmach(5)
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75 integer i
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76 integer*4 large(4),small(4)
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77 equivalence ( dmach(1), small(1) )
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78 equivalence ( dmach(2), large(1) )
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79 data small(1),small(2) / 0, 1048576/
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80 data large(1),large(2) /-1,2146435071/
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81 d1mach = dmach(i)
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82 end function d1mach_little
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83 function d1mach_big(i) result(d1mach)
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84 implicit none
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85 double precision d1mach,dmach(5)
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86 integer i
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87 integer*4 large(4),small(4)
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88 equivalence ( dmach(1), small(1) )
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89 equivalence ( dmach(2), large(1) )
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90 data small(1),small(2) /1048576, 0/
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91 data large(1),large(2) /2146435071,-1/
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92 d1mach = dmach(i)
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93 end function d1mach_big
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94 subroutine derived_types
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95 TYPE T1
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96 sequence
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97 character (3) :: chr
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98 integer :: i = 1
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99 integer :: j
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100 END TYPE T1
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101 TYPE T2
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102 sequence
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103 character (3) :: chr = "wxy"
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104 integer :: i = 1
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105 integer :: j = 4
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106 END TYPE T2
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107 TYPE(T1) :: a1
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108 TYPE(T2) :: a2
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109 EQUIVALENCE(a1,a2) ! { dg-warning="mixed|components" }
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131
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110 if (a1%chr .ne. "wxy") STOP 9
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111 if (a1%i .ne. 1) STOP 10
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112 if (a1%j .ne. 4) STOP 11
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111
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113 end subroutine derived_types
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114 end
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