; LLVM IR from dartsim/dart :: dart/common/Observer.ll (ZN4dart6common8ObserverD2Ev)

; 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.std::_Rb_tree_const_iterator" = type { ptr }
%"class.dart::common::Observer" = type { ptr, %"class.std::set" }
%"class.std::set" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<const dart::common::Subject *, const dart::common::Subject *, std::_Identity<const dart::common::Subject *>, std::less<const dart::common::Subject *>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<const dart::common::Subject *, const dart::common::Subject *, std::_Identity<const dart::common::Subject *>, std::less<const dart::common::Subject *>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }

@_ZTVN4dart6common8ObserverE = external dso_local unnamed_addr constant { [5 x ptr] }, align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN4dart6common8ObserverD2Ev(ptr noundef nonnull align 8 dereferenceable(56) %0) unnamed_addr #0 align 2 personality ptr @__gxx_personality_v0 {
  %2 = alloca ptr, align 8
  %3 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %4 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %5 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %6 = load ptr, ptr %2, align 8
  store ptr getelementptr inbounds inrange(-16, 24) ({ [5 x ptr] }, ptr @_ZTVN4dart6common8ObserverE, i32 0, i32 0, i32 2), ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %7 = getelementptr inbounds %"class.dart::common::Observer", ptr %6, i32 0, i32 1
  %8 = call ptr @_ZNKSt3setIPKN4dart6common7SubjectESt4lessIS4_ESaIS4_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %7) #4
  %9 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %3, i32 0, i32 0
  store ptr %8, ptr %9, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %10 = getelementptr inbounds %"class.dart::common::Observer", ptr %6, i32 0, i32 1
  %11 = call ptr @_ZNKSt3setIPKN4dart6common7SubjectESt4lessIS4_ESaIS4_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %10) #4
  %12 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %4, i32 0, i32 0
  store ptr %11, ptr %12, align 8
  br label %13

13:                                               ; preds = %20, %1
  %14 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorIPKN4dart6common7SubjectEES7_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #4
  br i1 %14, label %15, label %21

15:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %16 = call ptr @_ZNSt23_Rb_tree_const_iteratorIPKN4dart6common7SubjectEEppEi(ptr noundef nonnull align 8 dereferenceable(8) %3, i32 noundef 0) #4
  %17 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %5, i32 0, i32 0
  store ptr %16, ptr %17, align 8
  %18 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorIPKN4dart6common7SubjectEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %5) #4
  %19 = load ptr, ptr %18, align 8, !tbaa !5
  invoke void @_ZNK4dart6common7Subject14removeObserverEPNS0_8ObserverE(ptr noundef nonnull align 8 dereferenceable(56) %19, ptr noundef %6)
          to label %20 unwind label %23

20:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %13, !llvm.loop !11

21:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  %22 = getelementptr inbounds %"class.dart::common::Observer", ptr %6, i32 0, i32 1
  call void @_ZNSt3setIPKN4dart6common7SubjectESt4lessIS4_ESaIS4_EED2Ev(ptr noundef nonnull align 8 dereferenceable(48) %22) #4
  ret void

23:                                               ; preds = %15
  %24 = landingpad { ptr, i32 }
          catch ptr null
  %25 = extractvalue { ptr, i32 } %24, 0
  call void @__clang_call_terminate(ptr %25) #5
  unreachable
}

; 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 ptr @_ZNKSt3setIPKN4dart6common7SubjectESt4lessIS4_ESaIS4_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3setIPKN4dart6common7SubjectESt4lessIS4_ESaIS4_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorIPKN4dart6common7SubjectEES7_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt23_Rb_tree_const_iteratorIPKN4dart6common7SubjectEEppEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorIPKN4dart6common7SubjectEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

declare void @_ZNK4dart6common7Subject14removeObserverEPNS0_8ObserverE(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef) #2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: noinline noreturn nounwind uwtable
declare hidden void @__clang_call_terminate(ptr noundef) #3

; 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 @_ZNSt3setIPKN4dart6common7SubjectESt4lessIS4_ESaIS4_EED2Ev(ptr noundef nonnull align 8 dereferenceable(48)) 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 = { 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 = { noinline noreturn nounwind uwtable "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 }
attributes #5 = { noreturn 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 = !{!"vtable pointer", !8, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

%"struct.std::_Rb_tree_const_iterator" = type { ptr }

@_ZTVN4dart6common8ObserverE = external dso_local unnamed_addr constant { [5 x ptr] }, align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN4dart6common8ObserverD2Ev(ptr noundef nonnull align 8 dereferenceable(56) %0) unnamed_addr #0 align 2 personality ptr @__gxx_personality_v0 {
  %2 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %3 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %4 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  store ptr getelementptr inbounds inrange(-16, 24) (i8, ptr @_ZTVN4dart6common8ObserverE, i64 16), ptr %0, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = tail call ptr @_ZNKSt3setIPKN4dart6common7SubjectESt4lessIS4_ESaIS4_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %5) #4
  store ptr %6, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %7 = tail call ptr @_ZNKSt3setIPKN4dart6common7SubjectESt4lessIS4_ESaIS4_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %5) #4
  store ptr %7, ptr %3, align 8
  %8 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorIPKN4dart6common7SubjectEES7_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  br i1 %8, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1, %12
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %9 = call ptr @_ZNSt23_Rb_tree_const_iteratorIPKN4dart6common7SubjectEEppEi(ptr noundef nonnull align 8 dereferenceable(8) %2, i32 noundef 0) #4
  store ptr %9, ptr %4, align 8
  %10 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorIPKN4dart6common7SubjectEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %4) #4
  %11 = load ptr, ptr %10, align 8, !tbaa !8
  invoke void @_ZNK4dart6common7Subject14removeObserverEPNS0_8ObserverE(ptr noundef nonnull align 8 dereferenceable(56) %11, ptr noundef nonnull %0)
          to label %12 unwind label %14

12:                                               ; preds = %.lr.ph
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  %13 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorIPKN4dart6common7SubjectEES7_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3) #4
  br i1 %13, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %12, %1
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  call void @_ZNSt3setIPKN4dart6common7SubjectESt4lessIS4_ESaIS4_EED2Ev(ptr noundef nonnull align 8 dereferenceable(48) %5) #4
  ret void

14:                                               ; preds = %.lr.ph
  %15 = landingpad { ptr, i32 }
          catch ptr null
  %16 = extractvalue { ptr, i32 } %15, 0
  call void @__clang_call_terminate(ptr %16) #5
  unreachable
}

; 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 ptr @_ZNKSt3setIPKN4dart6common7SubjectESt4lessIS4_ESaIS4_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3setIPKN4dart6common7SubjectESt4lessIS4_ESaIS4_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorIPKN4dart6common7SubjectEES7_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt23_Rb_tree_const_iteratorIPKN4dart6common7SubjectEEppEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt23_Rb_tree_const_iteratorIPKN4dart6common7SubjectEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

declare void @_ZNK4dart6common7Subject14removeObserverEPNS0_8ObserverE(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef) local_unnamed_addr #2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: noinline noreturn nounwind uwtable
declare hidden void @__clang_call_terminate(ptr noundef) local_unnamed_addr #3

; 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 @_ZNSt3setIPKN4dart6common7SubjectESt4lessIS4_ESaIS4_EED2Ev(ptr noundef nonnull align 8 dereferenceable(48)) 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 = { mustprogress 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 = { noinline noreturn nounwind uwtable "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 }
attributes #5 = { noreturn 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"any pointer", !10, i64 0}
!10 = !{!"omnipotent char", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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