gcc/testsuite/gfortran.dg/power_4.f90

   1 ! { dg-do run }
   2 ! { dg-options "-ffrontend-optimize -fdump-tree-original" }
   3 ! PR 57071 - Check that 2**k is transformed into ishift(1,k).
   4 program main
   5   implicit none
   6   integer :: i,m,v
   7   integer, parameter :: n=30
   8   integer, dimension(-n:n) :: a,b,c,d,e
   9   m = n
  10
  11   v = 2
  12   ! Test scalar expressions.
  13   do i=-n,n
  14      if (2**i /= v**i) STOP 1
  15   end do
  16
  17   ! Test array constructors
  18   b = [(2**i,i=-m,m)]
  19   c = [(v**i,i=-m,m)]
  20   if (any(b /= c)) STOP 2
  21
  22   ! Test array expressions
  23   a = [(i,i=-m,m)]
  24   d = 2**a
  25   e = v**a
  26   if (any(d /= e)) STOP 3
  27 end program main
  28 ! { dg-final { scan-tree-dump-times "_gfortran_pow_i4_i4" 3 "original" } }