[Bug target/49687] [4.6 Regression][avr] Missed optimization for widening MUL

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49687

--- Comment #6 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-07-29 
11:27:45 UTC ---
Author: gjl
Date: Fri Jul 29 11:27:39 2011
New Revision: 176923

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=176923
Log:

    PR target/49687
    * config/avr/avr.md (mulsi3, *mulsi3, mulu<mode>si3,
    muls<mode>si3, mulohisi3, mulhisi3, umulhisi3, usmulhisi3,
   
*<any_extend:extend_prefix><any_extend2:extend_prefix>mul<QIHI:mode><QIHI2:mode>si3):
    Add X to register footprint: Clobber r26/r27.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/avr/avr.md