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e7413972a4
This was due to arithmetic overflow in the getNumBits() computation. Now we cast BitWidth to a uint64_t so that does not occur during the computation. After the computation is complete, the uint64_t is truncated when the function returns. I know that this is not something that is likely to happen, but it *IS* a valid input and we should not blow up. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199609 91177308-0d34-0410-b5e6-96231b3b80d8
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