flang/test/Lower/common-block.f90

   1 ! RUN: bbc %s -o - | tco | FileCheck %s
   2 ! RUN: %flang -emit-llvm -S -mmlir -disable-external-name-interop %s -o - | FileCheck %s
   3
   4 ! CHECK: @_QB = common global [8 x i8] zeroinitializer
   5 ! CHECK: @_QBrien = common global [1 x i8] zeroinitializer
   6 ! CHECK: @_QBwith_empty_equiv = common global [8 x i8] zeroinitializer
   7 ! CHECK: @_QBx = global { float, float } { float 1.0{{.*}}, float 2.0{{.*}} }
   8 ! CHECK: @_QBy = common global [12 x i8] zeroinitializer
   9 ! CHECK: @_QBz = global { i32, [4 x i8], float } { i32 42, [4 x i8] undef, float 3.000000e+00 }
  10
  11 ! CHECK-LABEL: _QPs0
  12 subroutine s0
  13   common // a0, b0
  14
  15   ! CHECK: call void @_QPs(ptr @_QB, ptr getelementptr (i8, ptr @_QB, i64 4))
  16   call s(a0, b0)
  17 end subroutine s0
  18
  19 ! CHECK-LABEL: _QPs1
  20 subroutine s1
  21   common /x/ a1, b1
  22   data a1 /1.0/, b1 /2.0/
  23
  24   ! CHECK: call void @_QPs(ptr @_QBx, ptr getelementptr (i8, ptr @_QBx, i64 4))
  25   call s(a1, b1)
  26 end subroutine s1
  27
  28 ! CHECK-LABEL: _QPs2
  29 subroutine s2
  30   common /y/ a2, b2, c2
  31
  32   ! CHECK: call void @_QPs(ptr @_QBy, ptr getelementptr (i8, ptr @_QBy, i64 4))
  33   call s(a2, b2)
  34 end subroutine s2
  35
  36 ! Test that common initialized through aliases of common members are getting
  37 ! the correct initializer.
  38 ! CHECK-LABEL: _QPs3
  39 subroutine s3
  40  integer :: i = 42
  41  real :: x
  42  complex :: c
  43  real :: glue(2)
  44  real :: y = 3.
  45  equivalence (i, x), (glue(1), c), (glue(2), y)
  46  ! x and c are not directly initialized, but overlapping aliases are.
  47  common /z/ x, c
  48 end subroutine s3
  49
  50 module mod_with_common
  51   integer :: i, j
  52   common /c_in_mod/ i, j
  53 end module
  54 ! CHECK-LABEL: _QPs4
  55 subroutine s4
  56   use mod_with_common
  57   ! CHECK: load i32, ptr @_QBc_in_mod
  58   print *, i
  59   ! CHECK: load i32, ptr getelementptr (i8, ptr @_QBc_in_mod, i64 4)
  60   print *, j
  61 end subroutine s4
  62
  63 ! CHECK-LABEL: _QPs5
  64 subroutine s5
  65   real r(1:0)
  66   common /rien/ r
  67 end subroutine s5
  68
  69 ! CHECK-LABEL: _QPs6
  70 subroutine s6
  71   real r1(1:0), r2(1:0), x, y
  72   common /with_empty_equiv/ x, r1, y
  73   equivalence(r1, r2)
  74 end subroutine s6