Nick Lewycky a93c874757 Reinstate the optimization from r151449 with a fix to not turn 'gep %x' into
'gep null' when the icmp predicate is unsigned (or is signed without inbounds).

llvm-svn: 151467
2012-02-26 02:09:49 +00:00
..
2011-01-14 14:16:33 +00:00