gcc/testsuite/gfortran.dg/matmul_9.f90

   1 ! { dg-do run }
   2 ! { dg-options "-fdump-tree-original" }
   3 !
   4 ! PR fortran/56318
   5 !
   6 ! Contributed by Alberto Luaces
   7 !
   8 SUBROUTINE mass_matrix
   9   DOUBLE PRECISION,PARAMETER::m1=1.d0
  10   DOUBLE PRECISION,DIMENSION(3,2),PARAMETER::A1=reshape([1.d0,0.d0, 0.d0, &
  11        0.d0,1.d0, 0.d0],[3,2])
  12   DOUBLE PRECISION,DIMENSION(2,2),PARAMETER::Mel=reshape([1.d0/3.d0, 0.d0, &
  13        0.d0, 1.d0/3.d0],[2,2])
  14
  15   DOUBLE PRECISION,DIMENSION(3,3)::MM1
  16
  17   MM1=m1*matmul(A1,matmul(Mel,transpose(A1)))
  18   !print '(3f8.3)', MM1
  19   if (any (abs (MM1 &
  20                 - reshape ([1.d0/3.d0, 0.d0,      0.d0,  &
  21                             0.d0,      1.d0/3.d0, 0.d0,  &
  22                             0.d0,      0.d0,      0.d0], &
  23                            [3,3])) > epsilon(1.0d0))) &
  24     STOP 1
  25 END SUBROUTINE mass_matrix
  26
  27 program name
  28   implicit none
  29   integer, parameter :: A(3,2) = reshape([1,2,3,4,5,6],[3,2])
  30   integer, parameter :: B(2,3) = reshape([3,17,23,31,43,71],[2,3])
  31   integer, parameter :: C(3)   = [-5,-7,-21]
  32   integer, parameter :: m1 = 1
  33
  34 !  print *, matmul(B,C)
  35    if (any (matmul(B,C) /= [-1079, -1793])) STOP 2
  36 !  print *, matmul(C,A)
  37    if (any (matmul(C,A) /= [-82, -181])) STOP 3
  38 !  print '(3i5)', m1*matmul(A,B)
  39   if (any (m1*matmul(A,B) /= reshape([71,91,111, 147,201,255, 327,441,555],&
  40                                      [3,3]))) &
  41      STOP 4
  42   call mass_matrix
  43 end program name
  44
  45 ! { dg-final { scan-tree-dump-times "matmul" 0 "original" } }
  46