On Mon, Jul 04, 2011 at 01:57:34PM -0700, H.J. Lu wrote: > forward_propagate_subreg issue was introduced by > > http://gcc.gnu.org/ml/gcc-patches/2009-08/msg01203.html > > Before that, fwprop never tries to work on hard registers.
I question this claim. It seems to me that fwprop did look at paradoxical subregs of hard regs before my change. > Alan, > is your change to process hard registers intentional? I didn't set out to do anything special with hard regs one way or the other, just extended what was already done for paradoxical subregs to sign and zero extended subregs. -- Alan Modra Australia Development Lab, IBM
