gcc/testsuite/gfortran.dg/function_optimize_1.f90

   1 ! { dg-do compile }
   2 ! { dg-options "-O -fdump-tree-original -Warray-temporaries" }
   3 program main
   4   implicit none
   5   real, dimension(2,2) :: a, b, c, d
   6   integer :: i
   7   real :: x, z
   8   character(60) :: line
   9   real, external :: ext_func
  10   interface
  11      elemental function element(x)
  12        real, intent(in) :: x
  13        real :: elem
  14      end function element
  15      pure function mypure(x)
  16        real, intent(in) :: x
  17        integer :: mypure
  18      end function mypure
  19      elemental impure function elem_impure(x)
  20        real, intent(in) :: x
  21        real :: elem_impure
  22      end function elem_impure
  23   end interface
  24
  25   data a /2., 3., 5., 7./
  26   data b /11., 13., 17., 23./
  27   write (unit=line, fmt='(4F7.2)') matmul(a,b)  &
  28        & + matmul(a,b)    ! { dg-warning "Creating array temporary" }
  29   z = sin(x) + cos(x) + sin(x) + cos(x)
  30   print *,z
  31   x = ext_func(a) + 23 + ext_func(a)
  32   print *,d,x
  33   z = element(x) + element(x)
  34   print *,z
  35   i = mypure(x) - mypure(x)
  36   print *,i
  37   z = elem_impure(x) - elem_impure(x)
  38   print *,z
  39 end program main
  40 ! { dg-final { scan-tree-dump-times "matmul_r4" 1 "original" } }
  41 ! { dg-final { scan-tree-dump-times "__builtin_sinf" 1 "original" } }
  42 ! { dg-final { scan-tree-dump-times "__builtin_cosf" 1 "original" } }
  43 ! { dg-final { scan-tree-dump-times "ext_func" 2 "original" } }
  44 ! { dg-final { scan-tree-dump-times "element" 1 "original" } }
  45 ! { dg-final { scan-tree-dump-times "mypure" 1 "original" } }
  46 ! { dg-final { scan-tree-dump-times "elem_impure" 2 "original" } }
  47 ! { dg-final { cleanup-tree-dump "original" } }