b.Aux = nil
	b.ResetControls()
	b.Likely = BranchUnknown
	b.Kind = BlockInvalid
}

// elimIfElse converts the two-way branch starting at dom in f to a conditional move if possible.
// loadAddr is a set of values which are used to compute the address of a load.
// Those values are exempt from CMOV generation.
func elimIfElse(f *Func, loadAddr *sparseSet, b *Block) bool {
	// See if 'b' ends in an if/else: it should