Chris Lattner 56784f9de6 fix rdar://9289603 - clang should fold trivial ?: for enums as well as integer constants into select at -O0 ...

by making the isCheapEnoughToEvaluateUnconditionally predicate handle anything that folds to a constant.  In particular, we now fold enums.

llvm-svn: 129649

2011-04-16 23:15:35 +00:00

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