dwarf linetable pretty printer

prettyprint.asm

julia> @code_native write(devnull, 'x')
        .text
; ┌ @ io.jl:644 within `write'
; │┌ @ io.jl:644 within `bswap'
        bswapl  %edi
        xorl    %eax, %eax
        nopw    %cs:(%rax,%rax)
        nop
; │└
; │ @ io.jl:648 within `write'
; │┌ @ int.jl:430 within `>>' @ int.jl:424
L16:
        shrl    $8, %edi
; │└
        addq    $1, %rax
; │┌ @ int.jl:414 within `==' @ promotion.jl:348 @ promotion.jl:398
        testl   %edi, %edi
; │└
        jne     L16
        retq
        nopl    (%rax)
; └

prettyprint.ll

julia> @code_llvm write(devnull, 'x')

;  @ io.jl:644 within `write'
define i64 @julia_write_16785(i32) {
top:
; ┌ @ int.jl:326 within `bswap'
   %1 = call i32 @llvm.bswap.i32(i32 %0)
   br label %L3

L3:                                               ; preds = %L3, %top
   %value_phi = phi i32 [ %1, %top ], [ %2, %L3 ]
   %value_phi1 = phi i64 [ 1, %top ], [ %4, %L3 ]
; └
;  @ io.jl:648 within `write'
; ┌ @ int.jl:430 within `>>' @ int.jl:424
   %2 = lshr i32 %value_phi, 8
; └
; ┌ @ int.jl:414 within `==' @ promotion.jl:348 @ promotion.jl:398
   %3 = icmp eq i32 %2, 0
; └
;  @ io.jl:649 within `write'
; ┌ @ int.jl:53 within `+'
   %4 = add nuw nsw i64 %value_phi1, 1
; └
;  @ io.jl:648 within `write'
  br i1 %3, label %L18, label %L3

L18:                                              ; preds = %L3
  ret i64 %value_phi1
}