optimization/7717: Invalid loop unrolling

[schwab@gcc.gnu.org]

Synopsis: Invalid loop unrolling

State-Changed-From-To: open->closed
State-Changed-By: schwab
State-Changed-When: Tue Oct 22 04:08:45 2002
State-Changed-Why:
    Fixed by this change:
    
    2002-09-27  Alan Modra  <amodra@bigpond.net.au>
    
    	* doloop.c (doloop_modify_runtime <biv skips initial incr>): Adjust
    	by absolute loop increment, not loop increment.

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