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

; 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 = external hidden unnamed_addr constant [23 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [19 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [42 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [21 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [31 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [33 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local void @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #5
  %6 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %1)
  %8 = load i32, ptr %1, align 4, !tbaa !5
  %9 = zext i32 %8 to i64
  %10 = call ptr @llvm.stacksave.p0()
  store ptr %10, ptr %2, align 8
  %11 = alloca i32, i64 %9, align 16
  store i64 %9, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  br label %12

12:                                               ; preds = %29, %0
  br label %13

13:                                               ; preds = %12
  %14 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  %15 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  %16 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  %17 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %5)
  %18 = load i32, ptr %5, align 4, !tbaa !5
  switch i32 %18, label %27 [
    i32 1, label %19
    i32 2, label %23
    i32 3, label %24
    i32 4, label %25
    i32 5, label %26
  ]

19:                                               ; preds = %13
  %20 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  %21 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %4)
  %22 = load i32, ptr %4, align 4, !tbaa !5
  call void @push(i32 noundef %22)
  br label %29

23:                                               ; preds = %13
  call void @pop()
  br label %29

24:                                               ; preds = %13
  call void @display()
  br label %29

25:                                               ; preds = %13
  call void @peek()
  br label %29

26:                                               ; preds = %13
  call void @exit(i32 noundef 0) #6
  unreachable

27:                                               ; preds = %13
  %28 = call i32 (ptr, ...) @printf(ptr noundef @.str.6)
  br label %29

29:                                               ; preds = %27, %25, %24, %23, %19
  br label %12
}

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

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

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

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #3

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

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) #4

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

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

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

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 = { nocallback nofree nosync nounwind willreturn }
attributes #4 = { noreturn 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 #5 = { nounwind }
attributes #6 = { noreturn 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 = external hidden unnamed_addr constant [23 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [19 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [42 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [21 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [31 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [33 x i8], align 1

; Function Attrs: noreturn nounwind uwtable
define dso_local void @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) #5
  %4 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %1)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #5
  br label %6

6:                                                ; preds = %.backedge, %0
  %7 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %8 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  %9 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4)
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %3)
  %11 = load i32, ptr %3, align 4, !tbaa !5
  switch i32 %11, label %20 [
    i32 1, label %12
    i32 2, label %16
    i32 3, label %17
    i32 4, label %18
    i32 5, label %19
  ]

12:                                               ; preds = %6
  %13 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5)
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2)
  %15 = load i32, ptr %2, align 4, !tbaa !5
  call void @push(i32 noundef %15)
  br label %.backedge

16:                                               ; preds = %6
  call void @pop()
  br label %.backedge

17:                                               ; preds = %6
  call void @display()
  br label %.backedge

18:                                               ; preds = %6
  call void @peek()
  br label %.backedge

19:                                               ; preds = %6
  call void @exit(i32 noundef 0) #6
  unreachable

20:                                               ; preds = %6
  %21 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6)
  br label %.backedge

.backedge:                                        ; preds = %20, %18, %17, %16, %12
  br label %6
}

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

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

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

; Function Attrs: nounwind uwtable
declare dso_local void @push(i32 noundef) local_unnamed_addr #3

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) local_unnamed_addr #4

; Function Attrs: nounwind uwtable
declare dso_local void @pop() local_unnamed_addr #3

; Function Attrs: nounwind uwtable
declare dso_local void @display() local_unnamed_addr #3

; Function Attrs: nounwind uwtable
declare dso_local void @peek() local_unnamed_addr #3

attributes #0 = { noreturn 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 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 #4 = { noreturn 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 #5 = { nounwind }
attributes #6 = { noreturn 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,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass