Wojciech Matyjewicz b6e6dacc60 Fix PR2002. Suppose n is the initial value for the induction
variable (with step 1) and m is its final value. Then, the correct trip 
count is SMAX(m,n)-n. Previously, we used SMAX(0,m-n), but m-n may 
overflow and can't in general be interpreted as signed.

Patch by Nick Lewycky.

llvm-svn: 47007
2008-02-12 15:09:36 +00:00
..
2007-06-29 16:35:07 +00:00