Dan Gohman fb9712bdae In GenerateReassociations, don't bother thinking about individual ...

SCEVUnknown values which are loop-variant, as LSR can't do anything
interesting with these values in any case. This fixes very slow compile
times on loops which have large numbers of such values.

llvm-svn: 106897

2010-06-25 22:32:18 +00:00

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