[PATCH] MCInstrAnalysis::evaluateBranch() silently fails without asserts

[Stephen Checkoway]

MCInstrAnalysis::evaluateBranch() was assuming that if the OperandType is MCOI::OPERAND_PCREL, then the operand was an immediate. This appears not to be the case.

I'm unsure if this is handling it correctly or if we should just give up immediately if it's not an immediate or something else.

I don't know how to write a test case for this since the assert only triggers in Debug.

-- 
Stephen Checkoway

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