------- Comment #1 from burnus at gcc dot gnu dot org 2010-07-02 07:31 ------- > At revision 161670, gfortran creates unneeded temporaries (not created up > to r161462). (r161462 = PR 44582)
channel.f90 has: program sw double precision,dimension(M,N):: f,dudx,dvdy,dhdx,dhdy dudx = ddx(u(:,:,mid)) contains function ddx(array) And the problem is: How should the compiler know that "ddx" does not use the (host associated) "dudx"? Note: The function "ddx" is not declared as PURE - and also cannot simply marked as pure as it host-associates the variables "I" and "J" - thus a simple check for no host association would not work. Hence, I fail to see how the compiler can handle it. Unless you find an example where the compiler could know it, I fear one has to close the PR as WONTFIX. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44773
