; LLVM IR from pdeljanov/Ayane :: src/MessageBus.ll (ZN5Ayane17MessageBusPrivate5clearEv)

; 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.Ayane::MessageBase" = type { ptr, i32, %"struct.std::atomic.0" }
%"struct.std::atomic.0" = type { %"struct.std::__atomic_base.1" }
%"struct.std::__atomic_base.1" = type { ptr }

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN5Ayane17MessageBusPrivate5clearEv(ptr noundef nonnull align 8 dereferenceable(153) %0) #0 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  %6 = call noundef ptr @_ZN5Ayane17MessageBusPrivate5flushEv(ptr noundef nonnull align 8 dereferenceable(153) %5)
  store ptr %6, ptr %3, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %21, %1
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %10, label %22

10:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %11, ptr %4, align 8, !tbaa !5
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds %"class.Ayane::MessageBase", ptr %12, i32 0, i32 2
  %14 = call noundef ptr @_ZNKSt6atomicIPN5Ayane11MessageBaseEEcvS2_Ev(ptr noundef nonnull align 8 dereferenceable(8) %13) #2
  store ptr %14, ptr %3, align 8, !tbaa !5
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = icmp eq ptr %15, null
  br i1 %16, label %21, label %17

17:                                               ; preds = %10
  %18 = load ptr, ptr %15, align 8, !tbaa !9
  %19 = getelementptr inbounds ptr, ptr %18, i64 1
  %20 = load ptr, ptr %19, align 8
  call void %20(ptr noundef nonnull align 8 dereferenceable(24) %15) #2
  br label %21

21:                                               ; preds = %17, %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  br label %7, !llvm.loop !11

22:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret void
}

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

; 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 noundef ptr @_ZN5Ayane17MessageBusPrivate5flushEv(ptr noundef nonnull align 8 dereferenceable(153)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNKSt6atomicIPN5Ayane11MessageBaseEEcvS2_Ev(ptr noundef nonnull align 8 dereferenceable(8)) #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 = { 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN5Ayane17MessageBusPrivate5clearEv(ptr noundef nonnull align 8 dereferenceable(153) %0) local_unnamed_addr #0 align 2 {
  %2 = tail call noundef ptr @_ZN5Ayane17MessageBusPrivate5flushEv(ptr noundef nonnull align 8 dereferenceable(153) %0)
  %.not6 = icmp eq ptr %2, null
  br i1 %.not6, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %1
  %3 = getelementptr inbounds i8, ptr %2, i64 16
  %4 = tail call noundef ptr @_ZNKSt6atomicIPN5Ayane11MessageBaseEEcvS2_Ev(ptr noundef nonnull align 8 dereferenceable(8) %3) #1
  %cond8 = icmp eq ptr %4, null
  br i1 %cond8, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %5 = phi ptr [ %10, %.lr.ph ], [ %4, %.lr.ph.preheader ]
  %6 = load ptr, ptr %5, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %6, i64 8
  %8 = load ptr, ptr %7, align 8
  tail call void %8(ptr noundef nonnull align 8 dereferenceable(24) %5) #1
  %9 = getelementptr inbounds i8, ptr %5, i64 16
  %10 = tail call noundef ptr @_ZNKSt6atomicIPN5Ayane11MessageBaseEEcvS2_Ev(ptr noundef nonnull align 8 dereferenceable(8) %9) #1
  %cond = icmp eq ptr %10, null
  br i1 %cond, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph.preheader, %1
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN5Ayane17MessageBusPrivate5flushEv(ptr noundef nonnull align 8 dereferenceable(153)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNKSt6atomicIPN5Ayane11MessageBaseEEcvS2_Ev(ptr noundef nonnull align 8 dereferenceable(8)) 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}


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