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4029c5944b
When a case of INT64_MIN was followed by a case that was greater than zero, we were overflowing a signed integer here. Since we've sorted the cases here anyway (and thus currentValue must be greater than nextValue) it's simple enough to avoid this by using addition rather than subtraction. Found by UBSAN on existing tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240201 91177308-0d34-0410-b5e6-96231b3b80d8