; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 12. Queue (priorityQueue_array)

; 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.2 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [34 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [91 x i8], align 1
@.str.10 = external hidden unnamed_addr constant [15 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [21 x i8], align 1

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

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

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

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

; 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
declare dso_local void @dequeue() #0

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

; Function Attrs: nounwind uwtable
define dso_local void @main() #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  store i32 0, ptr %1, align 4, !tbaa !5
  %2 = call i32 (ptr, ...) @printf(ptr noundef @.str.8)
  br label %3

3:                                                ; preds = %17, %0
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = icmp ne i32 %4, 4
  br i1 %5, label %6, label %18

6:                                                ; preds = %3
  %7 = call i32 (ptr, ...) @printf(ptr noundef @.str.9)
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.2, ptr noundef %1)
  %9 = load i32, ptr %1, align 4, !tbaa !5
  switch i32 %9, label %15 [
    i32 1, label %10
    i32 2, label %11
    i32 3, label %12
    i32 4, label %13
  ]

10:                                               ; preds = %6
  call void @enqueue()
  call void @display()
  br label %17

11:                                               ; preds = %6
  call void @dequeue()
  call void @display()
  br label %17

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

13:                                               ; preds = %6
  %14 = call i32 (ptr, ...) @printf(ptr noundef @.str.10)
  br label %17

15:                                               ; preds = %6
  %16 = call i32 (ptr, ...) @printf(ptr noundef @.str.11)
  br label %17

17:                                               ; preds = %15, %13, %12, %11, %10
  br label %3, !llvm.loop !9

18:                                               ; preds = %3
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  ret void
}

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"}


; 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.2 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [34 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [91 x i8], align 1
@.str.10 = external hidden unnamed_addr constant [15 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [21 x i8], align 1

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

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

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

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; 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
declare dso_local void @dequeue() local_unnamed_addr #0

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

; Function Attrs: nounwind uwtable
define dso_local void @main() local_unnamed_addr #0 {
.lr.ph.preheader:
  %0 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %0) #3
  store i32 0, ptr %0, align 4, !tbaa !5
  %1 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.8)
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %12
  %2 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.9)
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.2, ptr noundef nonnull %0)
  %4 = load i32, ptr %0, align 4, !tbaa !5
  switch i32 %4, label %10 [
    i32 1, label %5
    i32 2, label %6
    i32 3, label %7
    i32 4, label %8
  ]

5:                                                ; preds = %.lr.ph
  call void @enqueue()
  call void @display()
  br label %12

6:                                                ; preds = %.lr.ph
  call void @dequeue()
  call void @display()
  br label %12

7:                                                ; preds = %.lr.ph
  call void @display()
  br label %12

8:                                                ; preds = %.lr.ph
  %9 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.10)
  br label %12

10:                                               ; preds = %.lr.ph
  %11 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.11)
  br label %12

12:                                               ; preds = %10, %8, %7, %6, %5
  %13 = load i32, ptr %0, align 4, !tbaa !5
  %.not = icmp eq i32 %13, 4
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %0) #3
  ret void
}

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"}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,SCCPPass,SimplifyCFGPass,TailCallElimPass