s.vars[ptrVar] = p
	s.vars[lenVar] = l
	s.vars[capVar] = c
	if inplace {
		if sn.Op() == ir.ONAME {
			sn := sn.(*ir.Name)
			if sn.Class != ir.PEXTERN {
				// Tell liveness we're about to build a new slice
				s.vars[memVar] = s.newValue1A(ssa.OpVarDef, types.TypeMem, sn, s.mem())
			}
		}