program main
  implicit none
  integer(8) :: N
  integer(8) :: i,num
  read *, N
  num = 0
  do n = 1, N
    num = num + (n-1)
  enddo
  print *, num
end program
; 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.e522b92f41fc673e6026643fda5234bd = linkonce constant [73 x i8] c"/home/ubuntu/Downloads/TheStack_IR/Collated/Fortran/Source_3389/source.f\00"
@_QQEnvironmentDefaults = local_unnamed_addr constant ptr null

define void @_QQmain() local_unnamed_addr {
  %1 = alloca i64, align 8
  %2 = tail call ptr @_FortranAioBeginExternalListInput(i32 -1, ptr nonnull @_QQcl.e522b92f41fc673e6026643fda5234bd, i32 5)
  %3 = call i1 @_FortranAioInputInteger(ptr %2, ptr nonnull %1, i32 8)
  %4 = call i32 @_FortranAioEndIoStatement(ptr %2)
  %5 = load i64, ptr %1, align 8, !tbaa !3
  %6 = icmp sgt i64 %5, 0
  br i1 %6, label %.lr.ph.preheader, label %17

.lr.ph.preheader:                                 ; preds = %0
  %7 = add nsw i64 %5, -1
  %8 = zext i64 %7 to i65
  %9 = add nsw i64 %5, -2
  %10 = zext i64 %9 to i65
  %11 = mul i65 %8, %10
  %12 = lshr i65 %11, 1
  %13 = trunc i65 %12 to i64
  %14 = add i64 %5, %13
  %15 = add i64 %14, -1
  %16 = add nuw i64 %5, 1
  br label %17

17:                                               ; preds = %.lr.ph.preheader, %0
  %.0.lcssa = phi i64 [ %15, %.lr.ph.preheader ], [ 0, %0 ]
  %.lcssa = phi i64 [ %16, %.lr.ph.preheader ], [ 1, %0 ]
  store i64 %.lcssa, ptr %1, align 8, !tbaa !3
  %18 = call ptr @_FortranAioBeginExternalListOutput(i32 -1, ptr nonnull @_QQcl.e522b92f41fc673e6026643fda5234bd, i32 10)
  %19 = call i1 @_FortranAioOutputInteger64(ptr %18, i64 %.0.lcssa)
  %20 = call i32 @_FortranAioEndIoStatement(ptr %18)
  ret void
}

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 @_FortranAioBeginExternalListOutput(i32, ptr, i32) local_unnamed_addr

declare i1 @_FortranAioOutputInteger64(ptr, i64) local_unnamed_addr

!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"}
