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"It simplifies the type legalization part a bit, and produces better code by teaching SelectionDAG about the extra bits in an i8 SADDO/UADDO node. In essence, I spontaneously decided that on x86 this i8 boolean result would be either 0 or 1, and on other platforms 0/1 or 0/-1, depending on whether the platform likes it's boolean zero extended or sign extended." git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59864 91177308-0d34-0410-b5e6-96231b3b80d8
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