Edinburgh IMP77 Compiler - Version 8.4
    1 %begin
				.section	".text"
		.Ltext0:
				.align 4
				.global main
				.proc	04
		main:
		.LFB185:
		.LVL0:
				save	%sp, -176, %sp
		.LVL1:
    2 %owninteger nextsym=4
				mov	%i1, %o1
				call	_imp_initialise, 0
				 mov	%i0, %o0
		.LVL2:
		.LDL1:
		.LDL2:
		.LDL3:
		.LBB15:
		.LBB16:
				call	exit, 0
				 mov	0, %o0
		.LVL3:
		.LBE16:
		.LBE15:
				nop
		.LFE185:
		.Letext0:
    3 %integer opd
    4 opd=23
    5 %unless 20<=opd<=nextsym+20 %then printstring(" bug1
    6 ")
    7 %if 20<=opd<=nextsym+20 %then opd=opd %else printstring(" bug2
    8 ")
    9 %unless opd>=20  %and opd<=nextsym+20 %then printstring(" bug3
   10 ")
   11
   12 %endofprogram
    8 Statements compiled