program main
implicit None
	integer::s,p,n
	
	read*,s
	
	p = 1
	do
		if(s == 4 .or. s == 1 .or. s ==2)then
			print "(i0)",p+3
			stop
		endif
		if(mod(s,2) == 0)then
			s = s/2
			else
			s = s*3+1
		endif
		p = p+1
	enddo
end program main
; ModuleID = 'FIRModule'
source_filename = "FIRModule"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"

@_QQcl.45f56d04521780daf133274acdc45388 = linkonce constant [73 x i8] c"/home/ubuntu/Downloads/TheStack_IR/Collated/Fortran/Source_5067/source.f\00"
@_QQcl.28693029 = linkonce constant [4 x i8] c"(i0)"
@_QQEnvironmentDefaults = local_unnamed_addr constant ptr null

; Function Attrs: noreturn
define void @_QQmain() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = tail call ptr @_FortranAioBeginExternalListInput(i32 -1, ptr nonnull @_QQcl.45f56d04521780daf133274acdc45388, i32 5)
  %3 = call i1 @_FortranAioInputInteger(ptr %2, ptr nonnull %1, i32 4)
  %4 = call i32 @_FortranAioEndIoStatement(ptr %2)
  %.pr = load i32, ptr %1, align 4, !tbaa !3
  br label %5

5:                                                ; preds = %21, %0
  %6 = phi i32 [ %storemerge, %21 ], [ %.pr, %0 ]
  %.0 = phi i32 [ %22, %21 ], [ 1, %0 ]
  switch i32 %6, label %13 [
    i32 4, label %7
    i32 2, label %7
    i32 1, label %7
  ]

7:                                                ; preds = %5, %5, %5
  %8 = call ptr @_FortranAioBeginExternalFormattedOutput(ptr nonnull @_QQcl.28693029, i64 4, ptr null, i32 -1, ptr nonnull @_QQcl.45f56d04521780daf133274acdc45388, i32 10)
  %9 = add i32 %.0, 3
  %10 = call i1 @_FortranAioOutputInteger32(ptr %8, i32 %9)
  %11 = call i32 @_FortranAioEndIoStatement(ptr %8)
  %12 = call {} @_FortranAStopStatement(i32 0, i1 false, i1 false)
  unreachable

13:                                               ; preds = %5
  %14 = and i32 %6, 1
  %15 = icmp eq i32 %14, 0
  br i1 %15, label %16, label %18

16:                                               ; preds = %13
  %17 = sdiv i32 %6, 2
  br label %21

18:                                               ; preds = %13
  %19 = mul i32 %6, 3
  %20 = add i32 %19, 1
  br label %21

21:                                               ; preds = %16, %18
  %storemerge = phi i32 [ %20, %18 ], [ %17, %16 ]
  store i32 %storemerge, ptr %1, align 4, !tbaa !3
  %22 = add i32 %.0, 1
  br label %5
}

declare ptr @_FortranAioBeginExternalListInput(i32, ptr, i32) local_unnamed_addr

declare i1 @_FortranAioInputInteger(ptr, ptr, i32) local_unnamed_addr

declare i32 @_FortranAioEndIoStatement(ptr) local_unnamed_addr

declare ptr @_FortranAioBeginExternalFormattedOutput(ptr, i64, ptr, i32, ptr, i32) local_unnamed_addr

declare i1 @_FortranAioOutputInteger32(ptr, i32) local_unnamed_addr

declare {} @_FortranAStopStatement(i32, i1, i1) local_unnamed_addr

attributes #0 = { noreturn }

!llvm.module.flags = !{!0, !1, !2}

!0 = !{i32 2, !"Debug Info Version", i32 3}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{!4, !4, i64 0}
!4 = !{!"any data access", !5, i64 0}
!5 = !{!"any access", !6, i64 0}
!6 = !{!"Flang Type TBAA Root"}
