; LLVM IR from FOSS-UCSC/FOSSALGO :: data-structures/ds-pque/c (priority_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"

@.str.4 = external hidden unnamed_addr constant [20 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [112 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [28 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [40 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.10 = external hidden unnamed_addr constant [18 x i8], align 1

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

; 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

; 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 @print() #0

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

; 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
  %6 = 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
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %7 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  br label %8

8:                                                ; preds = %33, %0
  %9 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.6, ptr noundef %2)
  %11 = load i32, ptr %2, align 4, !tbaa !5
  switch i32 %11, label %30 [
    i32 1, label %12
    i32 2, label %27
    i32 3, label %28
    i32 0, label %32
  ]

12:                                               ; preds = %8
  %13 = call i32 (ptr, ...) @printf(ptr noundef @.str.7)
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.6, ptr noundef %3)
  %15 = call i32 (ptr, ...) @printf(ptr noundef @.str.8)
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %20, %12
  %17 = load i32, ptr %4, align 4, !tbaa !5
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %20, label %26

20:                                               ; preds = %16
  %21 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.9, ptr noundef %5, ptr noundef %6)
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = load i32, ptr %6, align 4, !tbaa !5
  call void @enqueue(i32 noundef %22, i32 noundef %23)
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %4, align 4, !tbaa !5
  br label %16, !llvm.loop !9

26:                                               ; preds = %16
  br label %32

27:                                               ; preds = %8
  call void @print()
  br label %32

28:                                               ; preds = %8
  %29 = call i32 @dequeue()
  br label %32

30:                                               ; preds = %8
  %31 = call i32 (ptr, ...) @printf(ptr noundef @.str.10)
  br label %32

32:                                               ; preds = %30, %28, %27, %26, %8
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %2, align 4, !tbaa !5
  %35 = icmp ne i32 %34, 0
  br i1 %35, label %8, label %36, !llvm.loop !11

36:                                               ; preds = %33
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  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 = { 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"}
!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"

@.str.4 = external hidden unnamed_addr constant [20 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [112 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [28 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [40 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.10 = external hidden unnamed_addr constant [18 x i8], align 1

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

; 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 @print() local_unnamed_addr #0

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

; 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 = 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
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  %5 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4)
  br label %6

6:                                                ; preds = %.loopexit, %0
  %7 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5)
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.6, ptr noundef nonnull %1)
  %9 = load i32, ptr %1, align 4, !tbaa !5
  switch i32 %9, label %25 [
    i32 1, label %10
    i32 2, label %22
    i32 3, label %23
    i32 0, label %.thread
  ]

10:                                               ; preds = %6
  %11 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7)
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.6, ptr noundef nonnull %2)
  %13 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.8)
  %14 = load i32, ptr %2, align 4, !tbaa !5
  %15 = icmp sgt i32 %14, 0
  br i1 %15, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %10, %.lr.ph
  %.03 = phi i32 [ %19, %.lr.ph ], [ 0, %10 ]
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.9, ptr noundef nonnull %3, ptr noundef nonnull %4)
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = load i32, ptr %4, align 4, !tbaa !5
  call void @enqueue(i32 noundef %17, i32 noundef %18)
  %19 = add nuw nsw i32 %.03, 1
  %20 = load i32, ptr %2, align 4, !tbaa !5
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %.lr.ph, label %.loopexit, !llvm.loop !9

22:                                               ; preds = %6
  call void @print()
  br label %.loopexit

23:                                               ; preds = %6
  %24 = call i32 @dequeue()
  br label %.loopexit

25:                                               ; preds = %6
  %26 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.10)
  br label %.loopexit

.loopexit:                                        ; preds = %.lr.ph, %10, %22, %23, %25
  %.pr = load i32, ptr %1, align 4, !tbaa !5
  %.not = icmp eq i32 %.pr, 0
  br i1 %.not, label %.thread, label %6, !llvm.loop !11

.thread:                                          ; preds = %6, %.loopexit
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  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"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


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