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The LLVM Lang Ref states for signed/unsigned int to float conversions: "If the value cannot fit in the floating point value, the results are undefined." And for FP to signed/unsigned int: "If the value cannot fit in ty2, the results are undefined." This matches the C definitions. The existing behavior pins to infinity or a max int value, but that may just lead to more confusion as seen in: http://llvm.org/bugs/show_bug.cgi?id=21130 Returning undef will hopefully lead to a less silent failure. Differential Revision: http://reviews.llvm.org/D5603 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219542 91177308-0d34-0410-b5e6-96231b3b80d8
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