[Bug tree-optimization/23821] [4.0/4.1 Regression] Dom creating harder to optimize code

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-09-11 
15:16 -------
Confirmed a regression.
The mainline and 4.0.0 on PPC gives:
L3:
        addi r9,r9,1
        bdz L10
L2:
        slwi r0,r9,2
        lwzx r2,r11,r0
        cmpw cr7,r2,r9
        beq+ cr7,L3

While 3.3 gives:
L7:
        lwz r3,0(r9)
        addi r9,r9,4
        cmpw cr0,r3,r2
        beq+ cr0,L4
        bl L_abort$stub
L4:
        addi r2,r2,1
        cmpwi cr1,r2,198
        ble+ cr1,L7

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |missed-optimization
   Last reconfirmed|0000-00-00 00:00:00         |2005-09-11 15:16:17
               date|                            |
            Summary|Dom creating harder to      |[4.0/4.1 Regression] Dom
                   |optimize code               |creating harder to optimize
                   |                            |code
   Target Milestone|---                         |4.0.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23821