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54a7f7f9e0
'J' represents a negative number suitable for an add/sub alias instruction, but while preparing it to become an int64_t we were mangling the sign extension. So "i32 -1" became 0xffffffffLL, for example. Should fix one half of PR20456. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214052 91177308-0d34-0410-b5e6-96231b3b80d8
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