; LLVM IR from ippeb/ACM-ICPC :: data_structure/queue (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.queue = type { [101 x i32], i32, i32, i32 }

@q = external dso_local global %struct.queue, align 4
@.str.2 = external hidden unnamed_addr constant [33 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [39 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [32 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [37 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [4 x i8], align 1

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

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

declare i32 @printf(ptr noundef, ...) #1

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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
  %5 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  %6 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  call void @init_queue()
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  br label %7

7:                                                ; preds = %10, %0
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.4, ptr noundef %2)
  %9 = load i32, ptr %2, align 4, !tbaa !5
  call void @enqueue(i32 noundef %9)
  br label %10

10:                                               ; preds = %7
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = icmp ne i32 %11, -1
  br i1 %12, label %7, label %13, !llvm.loop !9

13:                                               ; preds = %10
  %14 = load i32, ptr getelementptr inbounds (%struct.queue, ptr @q, i32 0, i32 3), align 4, !tbaa !11
  %15 = call i32 (ptr, ...) @printf(ptr noundef @.str.5, i32 noundef %14)
  %16 = load i32, ptr getelementptr inbounds (%struct.queue, ptr @q, i32 0, i32 1), align 4, !tbaa !13
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [101 x i32], ptr @q, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = load i32, ptr getelementptr inbounds (%struct.queue, ptr @q, i32 0, i32 2), align 4, !tbaa !14
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [101 x i32], ptr @q, i64 0, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = call i32 (ptr, ...) @printf(ptr noundef @.str.6, i32 noundef %19, i32 noundef %23)
  %25 = call i32 (ptr, ...) @printf(ptr noundef @.str.7)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %26 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.4, ptr noundef %3)
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %27

27:                                               ; preds = %34, %13
  %28 = load i32, ptr %4, align 4, !tbaa !5
  %29 = load i32, ptr %3, align 4, !tbaa !5
  %30 = icmp slt i32 %28, %29
  br i1 %30, label %31, label %37

31:                                               ; preds = %27
  %32 = call i32 @dequeue()
  %33 = call i32 (ptr, ...) @printf(ptr noundef @.str.8, i32 noundef %32)
  br label %34

34:                                               ; preds = %31
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %4, align 4, !tbaa !5
  br label %27, !llvm.loop !15

37:                                               ; preds = %27
  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
  %38 = load i32, ptr %1, align 4
  ret i32 %38
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #1

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 = { "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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!12, !6, i64 412}
!12 = !{!"", !7, i64 0, !6, i64 404, !6, i64 408, !6, i64 412}
!13 = !{!12, !6, i64 404}
!14 = !{!12, !6, i64 408}
!15 = distinct !{!15, !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"

%struct.queue = type { [101 x i32], i32, i32, i32 }

@q = external dso_local local_unnamed_addr global %struct.queue, align 4
@.str.2 = external hidden unnamed_addr constant [33 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [39 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [32 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [37 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [4 x i8], align 1

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

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

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @dequeue() 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) #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %4 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  tail call void @init_queue()
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  br label %5

5:                                                ; preds = %5, %0
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.4, ptr noundef nonnull %1)
  %7 = load i32, ptr %1, align 4, !tbaa !5
  call void @enqueue(i32 noundef %7)
  %8 = load i32, ptr %1, align 4, !tbaa !5
  %.not = icmp eq i32 %8, -1
  br i1 %.not, label %9, label %5, !llvm.loop !9

9:                                                ; preds = %5
  %10 = load i32, ptr getelementptr inbounds (i8, ptr @q, i64 412), align 4, !tbaa !11
  %11 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5, i32 noundef %10)
  %12 = load i32, ptr getelementptr inbounds (i8, ptr @q, i64 404), align 4, !tbaa !13
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [101 x i32], ptr @q, i64 0, i64 %13
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = load i32, ptr getelementptr inbounds (i8, ptr @q, i64 408), align 4, !tbaa !14
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [101 x i32], ptr @q, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6, i32 noundef %15, i32 noundef %19)
  %21 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  %22 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.4, ptr noundef nonnull %2)
  %23 = load i32, ptr %2, align 4, !tbaa !5
  %24 = icmp sgt i32 %23, 0
  br i1 %24, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %9, %.lr.ph
  %.03 = phi i32 [ %27, %.lr.ph ], [ 0, %9 ]
  %25 = call i32 @dequeue()
  %26 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.8, i32 noundef %25)
  %27 = add nuw nsw i32 %.03, 1
  %28 = load i32, ptr %2, align 4, !tbaa !5
  %29 = icmp slt i32 %27, %28
  br i1 %29, label %.lr.ph, label %._crit_edge, !llvm.loop !15

._crit_edge:                                      ; preds = %.lr.ph, %9
  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 #1

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 = { 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 #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!12, !6, i64 412}
!12 = !{!"", !7, i64 0, !6, i64 404, !6, i64 408, !6, i64 412}
!13 = !{!12, !6, i64 404}
!14 = !{!12, !6, i64 408}
!15 = distinct !{!15, !10}


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