gcc/testsuite/gfortran.dg/reassoc_4.f

   1 ! { dg-do compile }
   2 ! { dg-options "-O3 -ffast-math -fdump-tree-reassoc1" }
   3       subroutine anisonl(w,vo,anisox,s,ii1,jj1,weight)
   4       integer ii1,jj1,i1,iii1,j1,jjj1,k1,l1,m1,n1
   5       real*8 w(3,3),vo(3,3),anisox(3,3,3,3),s(60,60),weight
   6 !
   7 !     This routine replaces the following lines in e_c3d.f for
   8 !     an anisotropic material
   9 !
  10                       do i1=1,3
  11                         iii1=ii1+i1-1
  12                         do j1=1,3
  13                           jjj1=jj1+j1-1
  14                           do k1=1,3
  15                             do l1=1,3
  16                               s(iii1,jjj1)=s(iii1,jjj1)
  17      &                          +anisox(i1,k1,j1,l1)*w(k1,l1)*weight
  18                               do m1=1,3
  19                                 s(iii1,jjj1)=s(iii1,jjj1)
  20      &                              +anisox(i1,k1,m1,l1)*w(k1,l1)
  21      &                                 *vo(j1,m1)*weight
  22      &                              +anisox(m1,k1,j1,l1)*w(k1,l1)
  23      &                                 *vo(i1,m1)*weight
  24                                 do n1=1,3
  25                                   s(iii1,jjj1)=s(iii1,jjj1)
  26      &                              +anisox(m1,k1,n1,l1)
  27      &                              *w(k1,l1)*vo(i1,m1)*vo(j1,n1)*weight
  28                                 enddo
  29                               enddo
  30                             enddo
  31                           enddo
  32                         enddo
  33                       enddo
  34
  35       return
  36       end
  37
  38 ! There should be 22 multiplications left after un-distributing
  39 ! weigth, w(k1,l1), vo(i1,m1) and vo(j1,m1) on the innermost two
  40 ! unrolled loops.
  41
  42 ! { dg-final { scan-tree-dump-times "\[0-9\] \\\* " 22 "reassoc1" } }
  43 ! { dg-final { cleanup-tree-dump "reassoc1" } }