I am not 100% sure whether this is a duplicate of any of the other
missed-optimization PRs; it may well be. Currently, gfortran generates a
temporary for:
subroutine one()
REAL, ALLOCATABLE :: kpts(:,:)
REAL, POINTER :: syp(:,:)
kpts = syp
end subroutine one
However, "kpts" cannot alias as it is neither a POINTER nor a TARGET; if there
are components, one needs to be more careful - one also needs to check for
POINTER in the ultra most component. (By the way, dependency.c's
check_data_pointer_types needs to be modified to fix this.)
--
Summary: Unnecessary array temporary - non-pointer/non-target
does not alias
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: burnus at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43172
