r169013 - in /trunk/gcc: ChangeLog config/mn103...

[rth@gcc.gnu.org]

Author: rth
Date: Wed Jan 19 18:50:52 2011
New Revision: 169013

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=169013
Log:
mn10300: Emit retf instruction

Now that we properly track the life of MDR, we can emit
the RETF instruction if MDR has not been modified.  This
insn is 3-4 cycles faster since the return address is
already loaded.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/mn10300/mn10300-protos.h
    trunk/gcc/config/mn10300/mn10300.c
    trunk/gcc/config/mn10300/mn10300.md