; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 10. Linked List/c lang/CircularLinkedList (Deleting)

; 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"

@.str.3 = external hidden unnamed_addr constant [23 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [24 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [38 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.10 = external hidden unnamed_addr constant [18 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [3 x i8], align 1

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

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

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

; Function Attrs: nounwind uwtable
declare dso_local void @deleteEnd() #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
  %5 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %6 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  %7 = call i32 (ptr, ...) @printf(ptr noundef @.str.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
  %8 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  br label %9

9:                                                ; preds = %61, %0
  br label %10

10:                                               ; preds = %9
  %11 = call i32 (ptr, ...) @printf(ptr noundef @.str.6)
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.7, ptr noundef %2)
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = icmp eq i32 %13, 1
  br i1 %14, label %15, label %20

15:                                               ; preds = %10
  %16 = call i32 (ptr, ...) @printf(ptr noundef @.str.8)
  %17 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.7, ptr noundef %4)
  %18 = call i32 (ptr, ...) @printf(ptr noundef @.str.9)
  %19 = load i32, ptr %4, align 4, !tbaa !5
  call void @add(i32 noundef %19)
  br label %61

20:                                               ; preds = %10
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = icmp eq i32 %21, 2
  br i1 %22, label %23, label %49

23:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %24 = call i32 @sizeofList()
  store i32 %24, ptr %5, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %44, %23
  br label %26

26:                                               ; preds = %25
  %27 = call i32 (ptr, ...) @printf(ptr noundef @.str.10)
  %28 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.7, ptr noundef %3)
  %29 = load i32, ptr %3, align 4, !tbaa !5
  %30 = icmp eq i32 %29, 1
  br i1 %30, label %31, label %32

31:                                               ; preds = %26
  call void @deleteBeg()
  br label %47

32:                                               ; preds = %26
  %33 = load i32, ptr %3, align 4, !tbaa !5
  %34 = load i32, ptr %5, align 4, !tbaa !5
  %35 = icmp eq i32 %33, %34
  br i1 %35, label %36, label %37

36:                                               ; preds = %32
  call void @deleteEnd()
  br label %47

37:                                               ; preds = %32
  %38 = load i32, ptr %3, align 4, !tbaa !5
  %39 = icmp slt i32 %38, 1
  br i1 %39, label %44, label %40

40:                                               ; preds = %37
  %41 = load i32, ptr %3, align 4, !tbaa !5
  %42 = load i32, ptr %5, align 4, !tbaa !5
  %43 = icmp sgt i32 %41, %42
  br i1 %43, label %44, label %45

44:                                               ; preds = %40, %37
  br label %25

45:                                               ; preds = %40
  %46 = load i32, ptr %3, align 4, !tbaa !5
  call void @deletePos(i32 noundef %46)
  br label %47

47:                                               ; preds = %45, %36, %31
  %48 = call i32 (ptr, ...) @printf(ptr noundef @.str.9)
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %60

49:                                               ; preds = %20
  %50 = load i32, ptr %2, align 4, !tbaa !5
  %51 = icmp eq i32 %50, 3
  br i1 %51, label %52, label %54

52:                                               ; preds = %49
  call void @display()
  %53 = call i32 (ptr, ...) @printf(ptr noundef @.str.11)
  br label %59

54:                                               ; preds = %49
  %55 = load i32, ptr %2, align 4, !tbaa !5
  %56 = icmp eq i32 %55, 0
  br i1 %56, label %57, label %58

57:                                               ; preds = %54
  br label %62

58:                                               ; preds = %54
  br label %59

59:                                               ; preds = %58, %52
  br label %60

60:                                               ; preds = %59, %47
  br label %61

61:                                               ; preds = %60, %15
  br label %9

62:                                               ; preds = %57
  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
  %63 = load i32, ptr %1, align 4
  ret i32 %63
}

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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; 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"

@.str.3 = external hidden unnamed_addr constant [23 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [24 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [38 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.10 = external hidden unnamed_addr constant [18 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [3 x i8], align 1

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

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

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

; Function Attrs: nounwind uwtable
declare dso_local void @deleteEnd() 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
  %4 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  %5 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.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
  %6 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5)
  br label %7

7:                                                ; preds = %.backedge, %0
  %8 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6)
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.7, ptr noundef nonnull %1)
  %10 = load i32, ptr %1, align 4, !tbaa !5
  switch i32 %10, label %.backedge [
    i32 1, label %11
    i32 2, label %16
    i32 3, label %33
    i32 0, label %35
  ]

.backedge:                                        ; preds = %7, %31, %33, %11
  br label %7

11:                                               ; preds = %7
  %12 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.8)
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.7, ptr noundef nonnull %3)
  %14 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.9)
  %15 = load i32, ptr %3, align 4, !tbaa !5
  call void @add(i32 noundef %15)
  br label %.backedge

16:                                               ; preds = %7
  %17 = call i32 @sizeofList()
  br label %18

18:                                               ; preds = %27, %16
  %19 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.10)
  %20 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.7, ptr noundef nonnull %2)
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = icmp eq i32 %21, 1
  br i1 %22, label %23, label %24

23:                                               ; preds = %18
  call void @deleteBeg()
  br label %31

24:                                               ; preds = %18
  %25 = icmp eq i32 %21, %17
  br i1 %25, label %26, label %27

26:                                               ; preds = %24
  call void @deleteEnd()
  br label %31

27:                                               ; preds = %24
  %28 = icmp slt i32 %21, 1
  %29 = icmp sgt i32 %21, %17
  %or.cond = select i1 %28, i1 true, i1 %29
  br i1 %or.cond, label %18, label %30

30:                                               ; preds = %27
  call void @deletePos(i32 noundef %21)
  br label %31

31:                                               ; preds = %30, %26, %23
  %32 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.9)
  br label %.backedge

33:                                               ; preds = %7
  call void @display()
  %34 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.11)
  br label %.backedge

35:                                               ; preds = %7
  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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass