@code_warntype output

Variables:
  #self#::#test
  f::Base.#sin
  nx::Int64
  x::StepRangeLen{Float64,Base.TwicePrecision{Float64},Base.TwicePrecision{Float64}}
  u::Array{Float64,1}
  u0::ANY
  lI::Int64
  X::Array{Float64,1}
  z@_9::Int64
  b@_10::Bool
  #temp#@_11::Int64
  z@_12::Int64
  b@_13::Bool
  #temp#@_14::Int64

Body:
  begin 
      x::StepRangeLen{Float64,Base.TwicePrecision{Float64},Base.TwicePrecision{Float64}} = $(Expr(:invoke, MethodInstance for linspace(::Float64, ::Float64, ::Int64), :(Main.linspace), 0.0, 1.0, :(nx))) # line 33:
      u::Array{Float64,1} = $(Expr(:invoke, MethodInstance for init(::Function, ::StepRangeLen{Float64,Base.TwicePrecision{Float64},Base.TwicePrecision{Float64}}), :(Main.init), :(f), :(x))) # line 34:
      SSAValue(0) = (Base.sub_int)(nx::Int64, 1)::Int64
      SSAValue(1) = $(Expr(:new, UnitRange{Int64}, 1, :((Base.select_value)((Base.sle_int)(1, SSAValue(0))::Bool, SSAValue(0), (Base.sub_int)(1, 1)::Int64)::Int64)))
      $(Expr(:inbounds, false))
      # meta: location array.jl getindex 526
      SSAValue(2) = (Core.tuple)(SSAValue(1))::Tuple{UnitRange{Int64}}
      # meta: location abstractarray.jl checkbounds 362
      SSAValue(4) = (Core.getfield)(SSAValue(2), 1)::UnitRange{Int64}
      # meta: location abstractarray.jl checkbounds 347
      # meta: location abstractarray.jl linearindices 99
      # meta: location abstractarray.jl indices1 71
      # meta: location abstractarray.jl indices 64
      SSAValue(7) = (Base.arraysize)(u::Array{Float64,1}, 1)::Int64
      # meta: pop location
      # meta: pop location
      # meta: pop location
      SSAValue(11) = (Base.select_value)((Base.slt_int)(SSAValue(7), 0)::Bool, 0, SSAValue(7))::Int64
      # meta: location abstractarray.jl checkindex 459
      SSAValue(10) = (Core.getfield)(SSAValue(4), :start)::Int64
      SSAValue(9) = (Core.getfield)(SSAValue(4), :stop)::Int64
      # meta: pop location
      # meta: pop location
      SSAValue(3) = (Base.or_int)((Base.slt_int)((Core.getfield)(SSAValue(4), :stop)::Int64, (Core.getfield)(SSAValue(4), :start)::Int64)::Bool, (Base.and_int)((Base.and_int)((Base.sle_int)(1, SSAValue(10))::Bool, (Base.sle_int)(SSAValue(10), SSAValue(11))::Bool)::Bool, (Base.and_int)((Base.sle_int)(1, SSAValue(9))::Bool, (Base.sle_int)(SSAValue(9), SSAValue(11))::Bool)::Bool)::Bool)::Bool
      unless SSAValue(3) goto 29
      goto 31
      29: 
      $(Expr(:invoke, MethodInstance for throw_boundserror(::Array{Float64,1}, ::Tuple{UnitRange{Int64}}), :(Base.throw_boundserror), :(u), SSAValue(2)))
      31: 
      # meta: pop location # line 527:
      # meta: location range.jl length 393
      # meta: location checked.jl checked_sub 221
      SSAValue(12) = (Base.Checked.checked_ssub_int)((Core.getfield)(SSAValue(1), :stop)::Int64, (Core.getfield)(SSAValue(1), :start)::Int64)::Tuple{Int64,Bool}
      SSAValue(15) = (Base.getfield)(SSAValue(12), 1)::Int64
      SSAValue(17) = (Base.getfield)(SSAValue(12), 2)::Bool # line 222:
      unless SSAValue(17) goto 42
      (Base.Checked.throw)($(QuoteNode(OverflowError())))::UNION{}
      42: 
      # meta: pop location
      # meta: location checked.jl checked_add 164
      SSAValue(19) = (Base.Checked.checked_sadd_int)(SSAValue(15), 1)::Tuple{Int64,Bool}
      SSAValue(22) = (Base.getfield)(SSAValue(19), 1)::Int64
      SSAValue(24) = (Base.getfield)(SSAValue(19), 2)::Bool # line 165:
      unless SSAValue(24) goto 51
      (Base.Checked.throw)($(QuoteNode(OverflowError())))::UNION{}
      51: 
      # meta: pop location
      # meta: pop location # line 528:
      X::Array{Float64,1} = $(Expr(:foreigncall, :(:jl_alloc_array_1d), Array{Float64,1}, svec(Any, Int64), Array{Float64,1}, 0, SSAValue(22), 0)) # line 529:
      unless (Base.slt_int)(0, SSAValue(22))::Bool goto 60 # line 530:
      $(Expr(:invoke, MethodInstance for unsafe_copy!(::Array{Float64,1}, ::Int64, ::Array{Float64,1}, ::Int64, ::Int64), :(Base.unsafe_copy!), :(X), 1, :(u), :((Core.getfield)(SSAValue(1), :start)::Int64), SSAValue(22)))
      60: 
      # meta: pop location
      $(Expr(:inbounds, :pop)) # line 35:
      return X::Array{Float64,1}
  end::Array{Float64,1}