; LLVM IR from gargarchit/Data_Structure_n_Algorithms :: Binary_Tree (Level_order_traversal)

; 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"

@root = external dso_local global ptr, align 8
@.str.4 = external hidden unnamed_addr constant [20 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [25 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [28 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [10 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [64 x i8], align 1
@.str.10 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [22 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local void @Insert(i32 noundef) #1

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

; Function Attrs: nounwind uwtable
declare dso_local void @Level_order(ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local void @inorder_display(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @main() #1 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  br label %4

4:                                                ; preds = %29, %0
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %6 = icmp ne i32 %5, 0
  br i1 %6, label %7, label %30

7:                                                ; preds = %4
  %8 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  %9 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  %10 = call i32 (ptr, ...) @printf(ptr noundef @.str.6)
  %11 = call i32 (ptr, ...) @printf(ptr noundef @.str.7)
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.8, ptr noundef %1)
  %13 = load i32, ptr %1, align 4, !tbaa !5
  %14 = icmp eq i32 %13, 0
  br i1 %14, label %15, label %17

15:                                               ; preds = %7
  %16 = call i32 (ptr, ...) @printf(ptr noundef @.str.9)
  store i32 1, ptr %3, align 4
  br label %31

17:                                               ; preds = %7
  %18 = load i32, ptr %1, align 4, !tbaa !5
  switch i32 %18, label %27 [
    i32 1, label %19
    i32 2, label %23
    i32 3, label %25
  ]

19:                                               ; preds = %17
  %20 = call i32 (ptr, ...) @printf(ptr noundef @.str.10)
  %21 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.8, ptr noundef %2)
  %22 = load i32, ptr %2, align 4, !tbaa !5
  call void @Insert(i32 noundef %22)
  br label %29

23:                                               ; preds = %17
  %24 = load ptr, ptr @root, align 8, !tbaa !9
  call void @inorder_display(ptr noundef %24)
  br label %29

25:                                               ; preds = %17
  %26 = load ptr, ptr @root, align 8, !tbaa !9
  call void @Level_order(ptr noundef %26)
  br label %29

27:                                               ; preds = %17
  %28 = call i32 (ptr, ...) @printf(ptr noundef @.str.11)
  br label %29

29:                                               ; preds = %27, %25, %23, %19
  br label %4, !llvm.loop !11

30:                                               ; preds = %4
  store i32 0, ptr %3, align 4
  br label %31

31:                                               ; preds = %30, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  %32 = load i32, ptr %3, align 4
  switch i32 %32, label %34 [
    i32 0, label %33
    i32 1, label %33
  ]

33:                                               ; preds = %31, %31
  ret void

34:                                               ; preds = %31
  unreachable
}

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

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

; Function Attrs: mustprogress nofree norecurse noreturn nosync nounwind willreturn memory(none) uwtable
define dso_local void @main() local_unnamed_addr #0 {
  unreachable
}

attributes #0 = { mustprogress nofree norecurse noreturn nosync nounwind willreturn memory(none) 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" }

!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)"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass