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27f37676a5
The code incorrectly inferred that the relationship of a constant expression to itself is FCMP_OEQ (ordered and equal), when it's actually FCMP_UEQ (unordered *or* equal). This change corrects that, and adds some more limited folds that can be done in this case. Differential revision: https://reviews.llvm.org/D51216 llvm-svn: 354381