; LLVM IR from imteekay/algorithms :: competitive-programming/uri (easy_problem_from_rujia_liu_1)

; 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z16getKthOccurrenceRSt6vectorIySaIyEEiy(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %1, i64 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %37, %3
  %12 = load i32, ptr %9, align 4, !tbaa !9
  %13 = sext i32 %12 to i64
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = call noundef i64 @_ZNKSt6vectorIySaIyEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %14) #2
  %16 = icmp ult i64 %13, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %11
  store i32 2, ptr %10, align 4
  br label %40

18:                                               ; preds = %11
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = load i32, ptr %9, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIySaIyEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %19, i64 noundef %21) #2
  %23 = load i64, ptr %22, align 8, !tbaa !11
  %24 = load i64, ptr %7, align 8, !tbaa !11
  %25 = icmp eq i64 %23, %24
  br i1 %25, label %26, label %36

26:                                               ; preds = %18
  %27 = load i32, ptr %8, align 4, !tbaa !9
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %8, align 4, !tbaa !9
  %29 = load i32, ptr %8, align 4, !tbaa !9
  %30 = load i32, ptr %6, align 4, !tbaa !9
  %31 = icmp eq i32 %29, %30
  br i1 %31, label %32, label %35

32:                                               ; preds = %26
  %33 = load i32, ptr %9, align 4, !tbaa !9
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %40

35:                                               ; preds = %26
  br label %36

36:                                               ; preds = %35, %18
  br label %37

37:                                               ; preds = %36
  %38 = load i32, ptr %9, align 4, !tbaa !9
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %9, align 4, !tbaa !9
  br label %11, !llvm.loop !13

40:                                               ; preds = %32, %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  %41 = load i32, ptr %10, align 4
  switch i32 %41, label %43 [
    i32 2, label %42
  ]

42:                                               ; preds = %40
  store i32 0, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %43

43:                                               ; preds = %42, %40
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %44 = load i32, ptr %4, align 4
  ret i32 %44
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIySaIyEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIySaIyEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

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

attributes #0 = { mustprogress 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 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long long", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z16getKthOccurrenceRSt6vectorIySaIyEEiy(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = tail call noundef i64 @_ZNKSt6vectorIySaIyEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %.not18.not = icmp eq i64 %4, 0
  br i1 %.not18.not, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %3, %14
  %indvars.iv = phi i64 [ %indvars.iv.next, %14 ], [ 0, %3 ]
  %.01219 = phi i32 [ %.1, %14 ], [ 0, %3 ]
  %5 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIySaIyEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv) #1
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %7 = icmp eq i64 %6, %2
  br i1 %7, label %8, label %14

8:                                                ; preds = %.lr.ph
  %9 = add nsw i32 %.01219, 1
  %10 = icmp eq i32 %9, %1
  br i1 %10, label %11, label %14

11:                                               ; preds = %8
  %12 = trunc nuw nsw i64 %indvars.iv to i32
  %13 = add nuw nsw i32 %12, 1
  br label %.loopexit

14:                                               ; preds = %.lr.ph, %8
  %.1 = phi i32 [ %9, %8 ], [ %.01219, %.lr.ph ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %15 = tail call noundef i64 @_ZNKSt6vectorIySaIyEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %.not = icmp ugt i64 %15, %indvars.iv.next
  br i1 %.not, label %.lr.ph, label %.loopexit, !llvm.loop !9

.loopexit:                                        ; preds = %14, %3, %11
  %spec.select = phi i32 [ %13, %11 ], [ 0, %3 ], [ 0, %14 ]
  ret i32 %spec.select
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIySaIyEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIySaIyEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

attributes #0 = { mustprogress 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 = { 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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