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

; 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"

@qsize = external dso_local global i32, align 4
@.str.2 = external hidden unnamed_addr constant [17 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [20 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [15 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [22 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [15 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 @push(i32 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @pop() #1

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

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #1 {
  %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, ...) @printf(ptr noundef @.str.2)
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.3, ptr noundef %4)
  %7 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %15, %0
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = icmp slt i32 %9, %10
  br i1 %11, label %12, label %18

12:                                               ; preds = %8
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.3, ptr noundef %3)
  %14 = load i32, ptr %3, align 4, !tbaa !5
  call void @push(i32 noundef %14)
  br label %15

15:                                               ; preds = %12
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = add nsw i32 %16, 1
  store i32 %17, ptr %2, align 4, !tbaa !5
  br label %8, !llvm.loop !9

18:                                               ; preds = %8
  %19 = load i32, ptr @qsize, align 4, !tbaa !5
  %20 = call i32 (ptr, ...) @printf(ptr noundef @.str.5, i32 noundef %19)
  %21 = call i32 (ptr, ...) @printf(ptr noundef @.str.6)
  br label %22

22:                                               ; preds = %25, %18
  %23 = load i32, ptr @qsize, align 4, !tbaa !5
  %24 = icmp sgt i32 %23, 0
  br i1 %24, label %25, label %28

25:                                               ; preds = %22
  %26 = call i32 @pop()
  %27 = call i32 (ptr, ...) @printf(ptr noundef @.str.7, i32 noundef %26)
  br label %22, !llvm.loop !11

28:                                               ; preds = %22
  %29 = load i32, ptr @qsize, align 4, !tbaa !5
  %30 = call i32 (ptr, ...) @printf(ptr noundef @.str.8, i32 noundef %29)
  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 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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"

@qsize = external dso_local local_unnamed_addr global i32, align 4
@.str.2 = external hidden unnamed_addr constant [17 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [20 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [15 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [22 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [15 x i8], align 1

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

; Function Attrs: mustprogress 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 @push(i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @pop() local_unnamed_addr #1

; 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 #1 {
  %1 = alloca i32, align 4
  %2 = 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
  %3 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.3, ptr noundef nonnull %2)
  %5 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4)
  %6 = load i32, ptr %2, align 4, !tbaa !5
  %7 = icmp sgt i32 %6, 0
  br i1 %7, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.03 = phi i32 [ %10, %.lr.ph ], [ 0, %0 ]
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.3, ptr noundef nonnull %1)
  %9 = load i32, ptr %1, align 4, !tbaa !5
  call void @push(i32 noundef %9)
  %10 = add nuw nsw i32 %.03, 1
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %0
  %13 = load i32, ptr @qsize, align 4, !tbaa !5
  %14 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5, i32 noundef %13)
  %15 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6)
  %16 = load i32, ptr @qsize, align 4, !tbaa !5
  %17 = icmp sgt i32 %16, 0
  br i1 %17, label %.lr.ph5, label %._crit_edge6

.lr.ph5:                                          ; preds = %._crit_edge, %.lr.ph5
  %18 = call i32 @pop()
  %19 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7, i32 noundef %18)
  %20 = load i32, ptr @qsize, align 4, !tbaa !5
  %21 = icmp sgt i32 %20, 0
  br i1 %21, label %.lr.ph5, label %._crit_edge6, !llvm.loop !11

._crit_edge6:                                     ; preds = %.lr.ph5, %._crit_edge
  %.lcssa = phi i32 [ %16, %._crit_edge ], [ %20, %.lr.ph5 ]
  %22 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.8, i32 noundef %.lcssa)
  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 = { mustprogress 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 = { 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"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


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