[SLP]Reduce number of alternate instruction, where possible...
ExtractElementInst, ExtractValueInst>(TE.getMainOp()) ||-(TopToBottom && isa<StoreInst, InsertElementInst>(TE.getMainOp())) {-assert(!TE.isAltShuffle() && "Alternate instructions are only supported by "-"BinaryOperator and CastInst.");+if (TE....