2 Commits

Author	SHA1	Message	Date
Nick Lewycky	911bb6122c	Wind SCEV back in time, to Nov 18th. This 'fixes' PR3275, PR3294, PR3295, ... PR3296 and PR3302. llvm-svn: 62160	2009-01-13 09:18:58 +00:00
Nick Lewycky	c573f70ae4	Add a utility function that detects whether a loop is guaranteed to be finite. ... Use it to safely handle less-than-or-equals-to exit conditions in loops. These also occur when the loop exit branch is exit on true because SCEV inverses the icmp predicate. Use it again to handle non-zero strides, but only with an unsigned comparison in the exit condition. llvm-svn: 59528	2008-11-18 15:10:54 +00:00