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eb9033d963
This teaches the min/max idiom detector in ValueTracking to see through casts such as SExt/ZExt/Trunc. SCEV can already do this, so we're bringing non-SCEV analyses up to the same level. The returned LHS/RHS will not match the type of the original SelectInst any more, so a CastOp is returned too to inform the caller how to convert to the SelectInst's type. No in-tree users yet; this will be used by InstCombine in a followup. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237452 91177308-0d34-0410-b5e6-96231b3b80d8
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