[Bug middle-end/18002] [3.4/4.0 Regression] 'while' loop performace regression on avr target

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-10-14 20:04 
-------
Actually this is also a regression on PPC:
3.3:
_main:
        li r2,43
L2:
        lbz r3,0(r2)
        andi. r9,r3,32
        beq+ cr0,L2
        li r3,0
        blr

4.0.0:
L3:
        lbz r0,0(r2)
        xori r0,r0,32
        andi. r9,r0,32
        bne+ cr0,L3
        li r3,0
        blr

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
          Component|target                      |middle-end
     Ever Confirmed|                            |1
           Keywords|                            |missed-optimization
   Last reconfirmed|0000-00-00 00:00:00         |2004-10-14 20:04:00
               date|                            |
            Summary| [3.4/4.0 Regression]       |[3.4/4.0 Regression] 'while'
                   |'while' loop performace     |loop performace regression
                   |regression on avr target    |on avr target
   Target Milestone|---                         |3.4.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18002