In the function bar, the INTENT(IN) markers mean that p and q may not be
modified by bar. This means that the constants 3 and 12 can be progagated
in the function foo. My guess is that there should be some way for alias
analysis to be taught about this, so I've added the experts to the CC: list.
integer function foo(a,b,c)
integer, intent(out) :: a
integer, intent(in) :: b, c
integer p, q
p = 3
q = 12
a = bar(b,c,p,q)
foo = p*q
end function
integer function bar(b,c,p,q)
integer, intent(in) :: b, c, p, q
bar = p*b + q*c
end function
--
Summary: INTENT information not used in the middle-end for
optimizations
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Keywords: missed-optimization, alias
Severity: normal
Priority: P2
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: steven at gcc dot gnu dot org
CC: dberlin at gcc dot gnu dot org,dnovillo at redhat dot
com,gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23169
