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Author SHA1 Message Date
Nick Lewycky
58ab63e179 Make the 'icmp pred trunc(ext(X)), CST --> icmp pred X, ext(trunc(CST))' 
transformation much more careful. Truncating binary '01' to '1' sounds like it's
safe until you realize that it switched from positive to negative under a signed
interpretation, and that depends on the icmp predicate.

Also a few miscellaneous cleanups.

llvm-svn: 97721
 2010-03-04 06:54:10 +00:00