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IEEE 754 defines the expected result on overflow. As far as I know, hardware implementations (of f16), and compiler-rt (__floatuntisf) correctly return +-Inf on overflow. And I can't think of any useful transform that would take advantage of overflow being undefined here. Differential Revision: https://reviews.llvm.org/D47807 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@334777 91177308-0d34-0410-b5e6-96231b3b80d8