The line 'a=pbc(p(i)%r)' warns twice about an array temporary, but none should
be needed:

MODULE M1
  IMPLICIT NONE
  TYPE particle
   REAL :: r(3)
  END TYPE
CONTAINS
  SUBROUTINE S1()
     TYPE(particle), POINTER, DIMENSION(:) :: p
     REAL :: a(3)
     INTEGER :: i
     a=pbc(p(i)%r)
  END SUBROUTINE S1
  FUNCTION pbc(a)
     REAL :: a(3)
     REAL :: pbc(3)
     pbc=a
  END FUNCTION
END MODULE M1


-- 
           Summary: unneeded temporary (2x)
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jv244 at cam dot ac dot uk


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36932

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