[NewOptimizer] (Legacy) IR does not show line number information anymore

[maleadt]

   _       _ _(_)_     |  A fresh approach to technical computing
  (_)     | (_) (_)    |  Documentation: https://docs.julialang.org
   _ _   _| |_  __ _   |  Type "?help" for help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 0.7.0-DEV.4839 (2018-04-10 06:39 UTC)
 _/ |\__'_|_|_|\__'_|  |  Commit 000f243d5d* (38 days old master)
|__/                   |  x86_64-pc-linux-gnu

julia> @code_warntype sin(1)
Variables:
  x::Int64

Body:
  begin
      # meta: location float.jl float 266
      # meta: location float.jl Type 251
      # meta: location float.jl Type 57
      Core.SSAValue(4) = (Base.sitofp)(Float64, x::Int64)::Float64
      # meta: pop locations (3)
      Core.SSAValue(1) = $(Expr(:invoke, MethodInstance for sin(::Float64), :(Base.Math.sin), Core.SSAValue(4)))::Float64
      return Core.SSAValue(1)
  end::Float64

   _       _ _(_)_     |  A fresh approach to technical computing
  (_)     | (_) (_)    |  Documentation: https://docs.julialang.org
   _ _   _| |_  __ _   |  Type "?help" for help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 0.7.0-DEV.5127 (2018-05-18 07:05 UTC)
 _/ |\__'_|_|_|\__'_|  |  master/ecf24255ac* (fork: 4086 commits, 303 days)
|__/                   |  x86_64-pc-linux-gnu

julia> @code_warntype sin(1)
Variables:
  x::Int64

Body:
  begin
      (Base.sitofp)(Float64, x::Int64)::Float64
      $(Expr(:invoke, MethodInstance for sin(::Float64), :(Base.Math.sin), Core.SSAValue(1)))::Float64
      return Core.SSAValue(2)
  end::Float64

[Keno]

There's new printing for the new IR, which needs to be hooked up.

[mbauman]

Even more annoying is that we're missing the printing of SSAValue assignments. I think we're just seeing the RHS.

[vtjnash]

This was closed, but the referenced PR didn't actually bring back most of the information we used to have access to.