; LLVM IR from Leet-Us-Code/DSA-A-Z-Practice :: Sid's Levels/Level - 1/Heaps/kLargestOriginal.ll (Z8kLargestPiii)

; 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::priority_queue" = type <{ %"class.std::vector", [8 x i8] }>

; Function Attrs: mustprogress uwtable
define dso_local void @_Z8kLargestPiii(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8 %0, ptr noundef %1, i32 noundef %2, i32 noundef %3) #0 personality ptr @__gxx_personality_v0 {
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca %"class.std::priority_queue", align 8
  %10 = alloca i32, align 4
  %11 = alloca ptr, align 8
  %12 = alloca i32, align 4
  %13 = alloca i1, align 1
  %14 = alloca i32, align 4
  store ptr %0, ptr %5, align 8
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !9
  store i32 %3, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 32, ptr %9) #4
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(25) %9)
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #4
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %26, %4
  %16 = load i32, ptr %10, align 4, !tbaa !9
  %17 = load i32, ptr %7, align 4, !tbaa !9
  %18 = icmp slt i32 %16, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #4
  br label %33

20:                                               ; preds = %15
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = load i32, ptr %10, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i32, ptr %21, i64 %23
  invoke void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25) %9, ptr noundef nonnull align 4 dereferenceable(4) %24)
          to label %25 unwind label %29

25:                                               ; preds = %20
  br label %26

26:                                               ; preds = %25
  %27 = load i32, ptr %10, align 4, !tbaa !9
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %10, align 4, !tbaa !9
  br label %15, !llvm.loop !11

29:                                               ; preds = %20
  %30 = landingpad { ptr, i32 }
          cleanup
  %31 = extractvalue { ptr, i32 } %30, 0
  store ptr %31, ptr %11, align 8
  %32 = extractvalue { ptr, i32 } %30, 1
  store i32 %32, ptr %12, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #4
  br label %59

33:                                               ; preds = %19
  store i1 false, ptr %13, align 1
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %14) #4
  store i32 0, ptr %14, align 4, !tbaa !9
  br label %34

34:                                               ; preds = %48, %33
  %35 = load i32, ptr %14, align 4, !tbaa !9
  %36 = load i32, ptr %8, align 4, !tbaa !9
  %37 = icmp slt i32 %35, %36
  br i1 %37, label %38, label %42

38:                                               ; preds = %34
  %39 = invoke noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25) %9)
          to label %40 unwind label %51

40:                                               ; preds = %38
  %41 = xor i1 %39, true
  br label %42

42:                                               ; preds = %40, %34
  %43 = phi i1 [ false, %34 ], [ %41, %40 ]
  br i1 %43, label %44, label %55

44:                                               ; preds = %42
  %45 = invoke noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25) %9)
          to label %46 unwind label %51

46:                                               ; preds = %44
  invoke void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 4 dereferenceable(4) %45)
          to label %47 unwind label %51

47:                                               ; preds = %46
  invoke void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25) %9)
          to label %48 unwind label %51

48:                                               ; preds = %47
  %49 = load i32, ptr %14, align 4, !tbaa !9
  %50 = add nsw i32 %49, 1
  store i32 %50, ptr %14, align 4, !tbaa !9
  br label %34, !llvm.loop !13

51:                                               ; preds = %47, %46, %44, %38
  %52 = landingpad { ptr, i32 }
          cleanup
  %53 = extractvalue { ptr, i32 } %52, 0
  store ptr %53, ptr %11, align 8
  %54 = extractvalue { ptr, i32 } %52, 1
  store i32 %54, ptr %12, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %14) #4
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  br label %59

55:                                               ; preds = %42
  store i1 true, ptr %13, align 1
  call void @llvm.lifetime.end.p0(i64 4, ptr %14) #4
  %56 = load i1, ptr %13, align 1
  br i1 %56, label %58, label %57

57:                                               ; preds = %55
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  br label %58

58:                                               ; preds = %57, %55
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(25) %9) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %9) #4
  ret void

59:                                               ; preds = %51, %29
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(25) %9) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %9) #4
  br label %60

60:                                               ; preds = %59
  %61 = load ptr, ptr %11, align 8
  %62 = load i32, ptr %12, align 4
  %63 = insertvalue { ptr, i32 } poison, ptr %61, 0
  %64 = insertvalue { ptr, i32 } %63, i32 %62, 1
  resume { ptr, i32 } %64
}

; 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 void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(25)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

declare i32 @__gxx_personality_v0(...)

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(25)) unnamed_addr #3 align 2

attributes #0 = { mustprogress 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 = { 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 #3 = { inlinehint 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 #4 = { 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 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::priority_queue" = type <{ %"class.std::vector", [8 x i8] }>

; Function Attrs: mustprogress uwtable
define dso_local void @_Z8kLargestPiii(ptr dead_on_unwind noalias writable sret(%"class.std::vector") align 8 %0, ptr noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %5 = alloca %"class.std::priority_queue", align 8
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %5) #4
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(25) %5)
  %6 = icmp sgt i32 %2, 0
  br i1 %6, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %4
  %wide.trip.count = zext nneg i32 %2 to i64
  br label %.lr.ph

._crit_edge:                                      ; preds = %9, %4
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  %7 = icmp sgt i32 %3, 0
  br i1 %7, label %.lr.ph17, label %.critedge

.lr.ph:                                           ; preds = %.lr.ph.preheader, %9
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %9 ]
  %8 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv
  invoke void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25) %5, ptr noundef nonnull align 4 dereferenceable(4) %8)
          to label %9 unwind label %10

9:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

10:                                               ; preds = %.lr.ph
  %11 = landingpad { ptr, i32 }
          cleanup
  br label %20

.lr.ph17:                                         ; preds = %._crit_edge, %16
  %.015 = phi i32 [ %17, %16 ], [ 0, %._crit_edge ]
  %12 = call noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25) %5)
  br i1 %12, label %.critedge, label %13

13:                                               ; preds = %.lr.ph17
  %14 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25) %5)
  invoke void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 4 dereferenceable(4) %14)
          to label %15 unwind label %18

15:                                               ; preds = %13
  invoke void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25) %5)
          to label %16 unwind label %18

16:                                               ; preds = %15
  %17 = add nuw nsw i32 %.015, 1
  %exitcond20.not = icmp eq i32 %17, %3
  br i1 %exitcond20.not, label %.critedge, label %.lr.ph17, !llvm.loop !7

18:                                               ; preds = %15, %13
  %19 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #4
  br label %20

.critedge:                                        ; preds = %16, %.lr.ph17, %._crit_edge
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(25) %5) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #4
  ret void

20:                                               ; preds = %18, %10
  %.pn = phi { ptr, i32 } [ %11, %10 ], [ %19, %18 ]
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(25) %5) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #4
  resume { ptr, i32 } %.pn
}

; Function Attrs: mustprogress 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 void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(25)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt4lessIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(25)) unnamed_addr #3 align 2

attributes #0 = { mustprogress 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 = { 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 #3 = { inlinehint 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 #4 = { 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = distinct !{!7, !6}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass