[MITgcm-devel] compiler optimization on SunOS

[Martin Losch]

Hi there,
I have traced down the optimization problem to this section:
>         DO K=Nr,1,-1
>          DO j=1,sNy+1
>           DO i=1,sNx+1
>            uf(i,j) = _dyG(i,j,bi,bj)*deepFacC(k)
>      &               *drF(k)*_hFacW(i,j,k,bi,bj)*rhoFacC(k)
>            vf(i,j) = _dxG(i,j,bi,bj)*deepFacC(k)
>      &               *drF(k)*_hFacS(i,j,k,bi,bj)*rhoFacC(k)
>           ENDDO
>          ENDDO
>          CALL CALC_DIV_GHAT(
>      I       bi,bj,1,sNx,1,sNy,K,
>      I       uf,vf,
>      U       cg2d_b,
>      I       myThid)
>         ENDDO
When I increase the loop ranges to 1-Oly,sNy+Oly and 1-Olx,sNx+Olx,  
everything is fine even with the high optimization level. What do you  
think about increasing these loop ranges, or at least initializtion  
vf and uf properly (I didn't try yet, if that would work, too).

Martin