gistfile1.txt

$ rvm ruby-2.6.5 do ruby -e 'puts RubyVM::InstructionSequence.compile("print if 2..3").disasm'
<compiled>:1: warning: integer literal in conditional range
<compiled>:1: warning: integer literal in conditional range
== disasm: #<ISeq:<compiled>@<compiled>:1 (1,0)-(1,13)> (catch: FALSE)
0000 getspecial                   2, 0                                (   1)[Li]
0003 branchif                     18
0005 putobject                    2
0007 getglobal                    $.
0009 opt_eq                       <callinfo!mid:==, argc:1, ARGS_SIMPLE>, <callcache>
0012 branchunless                 36
0014 putobject                    true
0016 setspecial                   2
0018 putobject                    3
0020 getglobal                    $.
0022 opt_eq                       <callinfo!mid:==, argc:1, ARGS_SIMPLE>, <callcache>
0025 branchunless                 31
0027 putobject                    false
0029 setspecial                   2
0031 putself
0032 opt_send_without_block       <callinfo!mid:print, argc:0, FCALL|VCALL|ARGS_SIMPLE>, <callcache>
0035 leave
0036 putnil
0037 leave

gistfile2.txt

$ jruby -Xir.print -e "print if 2..3"
2020-12-15T13:33:27.417-06:00 [main] INFO JVMVisitor : Printing JIT IR for -e:
begin SCRIPT_BODY<-e>
flags: [BINDING_HAS_ESCAPED, REQUIRES_DYNSCOPE, REQUIRES_LASTLINE, REQUIRES_BLOCK, FLAGS_COMPUTED]
signature(pre=0,opt=0,post=0,rest=NONE,kwargs=0,kwreq=0,kwrest=-1)

block #1 (out: 6,2): LBL_2:-1
  0:          push_method_frame(frameName: -e, visibility: PRIVATE)
  1:          push_method_binding

block #2 (out: 3,4,7): LBL_3:-1
  0: %self := recv_self
  1:          line_num(lineNumber: 0, coverage: false, oneshot: false)
  2:  %v_2 := build_range(fix<2>, fix<3>, exclusive: false)
  3:          b_false(ipc<LBL_0:9>, %v_2, jumpTarget: LBL_0:9, value: %v_2)

block #3 (out: 6,7): LBL_4:-1
  0:  %v_3 := call_0o(self<%self>, callType: VARIABLE, name: print, potentiallyRefined: false)
  1:          pop_binding
  2:          pop_method_frame
  3:          return(%v_3)

block #7 (out: 6): _GLOBAL_ENSURE_BLOCK__0:-1
  0:  %v_4 := recv_jruby_exc
  1:          pop_binding
  2:          pop_method_frame
  3:          throw(%v_4)

block #6 (out: 7): LBL_5:-1
  0:          return(nil<>)

block #4 (out: 6,7): LBL_0:9
  0:          pop_binding
  1:          pop_method_frame
  2:          return(nil<>)

gistfile3.txt

$ rvm ruby-2.6.5 do ruby -e 'puts RubyVM::InstructionSequence.compile("while 2..3; print; end").disasm'
<compiled>:1: warning: integer literal in conditional range
<compiled>:1: warning: integer literal in conditional range
== disasm: #<ISeq:<compiled>@<compiled>:1 (1,0)-(1,22)> (catch: FALSE)
== catch table
| catch type: break  st: 0006 ed: 0045 sp: 0000 cont: 0045
| catch type: next   st: 0006 ed: 0045 sp: 0000 cont: 0003
| catch type: redo   st: 0006 ed: 0045 sp: 0000 cont: 0006
|------------------------------------------------------------------------
0000 jump                         11                                  (   1)[Li]
0002 putnil
0003 pop
0004 jump                         11
0006 putself
0007 opt_send_without_block       <callinfo!mid:print, argc:0, FCALL|VCALL|ARGS_SIMPLE>, <callcache>
0010 pop
0011 getspecial                   2, 0
0014 branchif                     29
0016 putobject                    2
0018 getglobal                    $.
0020 opt_eq                       <callinfo!mid:==, argc:1, ARGS_SIMPLE>, <callcache>
0023 branchunless                 44
0025 putobject                    true
0027 setspecial                   2
0029 putobject                    3
0031 getglobal                    $.
0033 opt_eq                       <callinfo!mid:==, argc:1, ARGS_SIMPLE>, <callcache>
0036 branchunless                 6
0038 putobject                    false
0040 setspecial                   2
0042 jump                         6
0044 putnil
0045 nop
0046 leave                                                            (   1)