; LLVM IR from HarshCasper/NeoAlgo :: C/ds (Double_Ended_Queue)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%struct.dequeue = type { [10 x i32], i32, i32 }

@dq = external dso_local global %struct.dequeue, align 4
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local void @enqueue_front(i32 noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local void @enqueue_rear(i32 noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @delete_front() #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @delete_rear() #0

; Function Attrs: nounwind uwtable
declare dso_local void @display() #0

declare i32 @printf(ptr noundef, ...) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.2, ptr noundef %2)
  store i32 -1, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 1), align 4, !tbaa !5
  store i32 -1, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 2), align 4, !tbaa !10
  br label %6

6:                                                ; preds = %26, %0
  %7 = load i32, ptr %2, align 4, !tbaa !11
  %8 = add nsw i32 %7, -1
  store i32 %8, ptr %2, align 4, !tbaa !11
  %9 = icmp ne i32 %7, 0
  br i1 %9, label %10, label %27

10:                                               ; preds = %6
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.2, ptr noundef %3)
  %12 = load i32, ptr %3, align 4, !tbaa !11
  switch i32 %12, label %26 [
    i32 1, label %13
    i32 2, label %16
    i32 3, label %19
    i32 4, label %22
    i32 5, label %25
  ]

13:                                               ; preds = %10
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.2, ptr noundef %4)
  %15 = load i32, ptr %4, align 4, !tbaa !11
  call void @enqueue_front(i32 noundef %15)
  br label %26

16:                                               ; preds = %10
  %17 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.2, ptr noundef %4)
  %18 = load i32, ptr %4, align 4, !tbaa !11
  call void @enqueue_rear(i32 noundef %18)
  br label %26

19:                                               ; preds = %10
  %20 = call i32 @delete_front()
  %21 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i32 noundef %20)
  br label %26

22:                                               ; preds = %10
  %23 = call i32 @delete_rear()
  %24 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i32 noundef %23)
  br label %26

25:                                               ; preds = %10
  call void @display()
  br label %26

26:                                               ; preds = %25, %22, %19, %16, %13, %10
  br label %6, !llvm.loop !12

27:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

attributes #0 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !9, i64 40}
!6 = !{!"", !7, i64 0, !9, i64 40, !9, i64 44}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!6, !9, i64 44}
!11 = !{!9, !9, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%struct.dequeue = type { [10 x i32], i32, i32 }

@dq = external dso_local local_unnamed_addr global %struct.dequeue, align 4
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local void @enqueue_front(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @enqueue_rear(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @delete_front() local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @delete_rear() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @display() local_unnamed_addr #0

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.2, ptr noundef nonnull %1)
  store i32 -1, ptr getelementptr inbounds (i8, ptr @dq, i64 40), align 4, !tbaa !5
  store i32 -1, ptr getelementptr inbounds (i8, ptr @dq, i64 44), align 4, !tbaa !10
  %5 = load i32, ptr %1, align 4, !tbaa !11
  %6 = add nsw i32 %5, -1
  store i32 %6, ptr %1, align 4, !tbaa !11
  %.not1 = icmp eq i32 %5, 0
  br i1 %.not1, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %22
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.2, ptr noundef nonnull %2)
  %8 = load i32, ptr %2, align 4, !tbaa !11
  switch i32 %8, label %22 [
    i32 1, label %9
    i32 2, label %12
    i32 3, label %15
    i32 4, label %18
    i32 5, label %21
  ]

9:                                                ; preds = %.lr.ph
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.2, ptr noundef nonnull %3)
  %11 = load i32, ptr %3, align 4, !tbaa !11
  call void @enqueue_front(i32 noundef %11)
  br label %22

12:                                               ; preds = %.lr.ph
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.2, ptr noundef nonnull %3)
  %14 = load i32, ptr %3, align 4, !tbaa !11
  call void @enqueue_rear(i32 noundef %14)
  br label %22

15:                                               ; preds = %.lr.ph
  %16 = call i32 @delete_front()
  %17 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i32 noundef %16)
  br label %22

18:                                               ; preds = %.lr.ph
  %19 = call i32 @delete_rear()
  %20 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i32 noundef %19)
  br label %22

21:                                               ; preds = %.lr.ph
  call void @display()
  br label %22

22:                                               ; preds = %21, %18, %15, %12, %9, %.lr.ph
  %23 = load i32, ptr %1, align 4, !tbaa !11
  %24 = add nsw i32 %23, -1
  store i32 %24, ptr %1, align 4, !tbaa !11
  %.not = icmp eq i32 %23, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !12

._crit_edge:                                      ; preds = %22, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #3
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

attributes #0 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !9, i64 40}
!6 = !{!"", !7, i64 0, !9, i64 40, !9, i64 44}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!6, !9, i64 44}
!11 = !{!9, !9, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass