On Sat, Jan 31, 2009 at 5:26 AM, Kaveh R. Ghazi <gh...@caip.rutgers.edu> wrote: > From: "Tobias Burnus" <bur...@net-b.de> > >> Hi Kaveh, >> >> Kaveh R. GHAZI wrote: >>> >>> I'm trying to create complex number expressions that contain inf or >>> nan in the imaginary part. I.e. (0 + inf I) or (0 + nan I). >> >> If it does not need to be C (e.g. to try MPC in the middle end), you >> could use Fortran: >> >> ! compile with gfortran -fno-range-check >> complex :: z >> z = cmplx(0.0, 0.0/0.0) >> print *, z >> end >> >> Tobias > > Thanks, I do want to test the middle-end. However I need to do more than > just create the complex expression. I also have to pass it to a builtin > that evaluates using MPC like __builtin_csin(). The fortran frontend > evaluates complex transcendentals in fortran/simplify.c, not in the > middle-end. So it wouldn't test what I want AFAICT. It's not a big deal, > the nan cases are error paths that should *avoid* folding via MPC.
If you go through memory the compiler should promote that to a register and constant propagate the result, isn't that enough? Thanks, Richard. > Regards, > --Kaveh > >
