[Bug middle-end/40194] fortran rules for optimizing

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2009-05-19 10:20 -------
Does

    SUBROUTINE S(I1,IP)
      INTEGER,INTENT(IN) :: I1
      INTEGER, POINTER :: IP
    END SUBROUTINE S

allow that S stores the pointer to I1 to global memory?

I think that the easiest way to improve Fortran code generation is to _not_
pass INTENT(IN) arguments by reference but by value (at least for scalar
types).  Maybe the FE can use DECL_BY_REFERENCE and the middle-end that
to derive non-clobber/escape status.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
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                 CC|                            |rguenth at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40194