; LLVM IR from v4kst1z/TinyGC :: TinyGC.ll (ZN6TinyGC19DetachCurrentThreadEv)

; 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::unique_lock" = type <{ ptr, i8, [7 x i8] }>
%"class.std::thread::id" = type { i64 }
%class.TinyGC = type <{ %"class.std::unordered_set", %"class.std::unordered_map", %"class.std::mutex", %"class.std::mutex", ptr, i32, i32, i32, i32, i32, [4 x i8] }>
%"class.std::unordered_set" = type { %"class.std::_Hashtable" }
%"class.std::_Hashtable" = type { ptr, i64, %"struct.std::__detail::_Hash_node_base", i64, %"struct.std::__detail::_Prime_rehash_policy", ptr }
%"struct.std::__detail::_Hash_node_base" = type { ptr }
%"struct.std::__detail::_Prime_rehash_policy" = type { float, i64 }
%"class.std::unordered_map" = type { %"class.std::_Hashtable.2" }
%"class.std::_Hashtable.2" = type { ptr, i64, %"struct.std::__detail::_Hash_node_base", i64, %"struct.std::__detail::_Prime_rehash_policy", ptr }
%"class.std::mutex" = type { %"class.std::__mutex_base" }
%"class.std::__mutex_base" = type { %union.pthread_mutex_t }
%union.pthread_mutex_t = type { %struct.__pthread_mutex_s }
%struct.__pthread_mutex_s = type { i32, i32, i32, i32, i32, i16, i16, %struct.__pthread_internal_list }
%struct.__pthread_internal_list = type { ptr, ptr }

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #0

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt11unique_lockISt5mutexEC2ERS0_(ptr noundef nonnull align 8 dereferenceable(9), ptr noundef nonnull align 8 dereferenceable(40)) unnamed_addr #2 align 2

; 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 @_ZNSt11unique_lockISt5mutexED2Ev(ptr noundef nonnull align 8 dereferenceable(9)) unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapINSt6thread2idEPN6TinyGC11ThreadStateESt4hashIS1_ESt8equal_toIS1_ESaISt4pairIKS1_S4_EEEixEOS1_(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local i64 @_ZNSt11this_thread6get_idEv() #4

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNSt13unordered_mapINSt6thread2idEPN6TinyGC11ThreadStateESt4hashIS1_ESt8equal_toIS1_ESaISt4pairIKS1_S4_EEE5eraseERSA_(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN6TinyGC19DetachCurrentThreadEv(ptr noundef nonnull align 8 dereferenceable(220) %0) #2 align 2 personality ptr @__gxx_personality_v0 {
  %2 = alloca ptr, align 8
  %3 = alloca %"class.std::unique_lock", align 8
  %4 = alloca ptr, align 8
  %5 = alloca %"class.std::thread::id", align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca %"class.std::thread::id", align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %9 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr %3) #5
  %10 = getelementptr inbounds %class.TinyGC, ptr %9, i32 0, i32 2
  call void @_ZNSt11unique_lockISt5mutexEC2ERS0_(ptr noundef nonnull align 8 dereferenceable(9) %3, ptr noundef nonnull align 8 dereferenceable(40) %10)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  %11 = getelementptr inbounds %class.TinyGC, ptr %9, i32 0, i32 1
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %12 = call i64 @_ZNSt11this_thread6get_idEv() #5
  %13 = getelementptr inbounds %"class.std::thread::id", ptr %5, i32 0, i32 0
  store i64 %12, ptr %13, align 8
  %14 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapINSt6thread2idEPN6TinyGC11ThreadStateESt4hashIS1_ESt8equal_toIS1_ESaISt4pairIKS1_S4_EEEixEOS1_(ptr noundef nonnull align 8 dereferenceable(56) %11, ptr noundef nonnull align 8 dereferenceable(8) %5)
          to label %15 unwind label %26

15:                                               ; preds = %1
  %16 = load ptr, ptr %14, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  store ptr %16, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds %class.TinyGC, ptr %9, i32 0, i32 1
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  %18 = call i64 @_ZNSt11this_thread6get_idEv() #5
  %19 = getelementptr inbounds %"class.std::thread::id", ptr %8, i32 0, i32 0
  store i64 %18, ptr %19, align 8
  %20 = invoke noundef i64 @_ZNSt13unordered_mapINSt6thread2idEPN6TinyGC11ThreadStateESt4hashIS1_ESt8equal_toIS1_ESaISt4pairIKS1_S4_EEE5eraseERSA_(ptr noundef nonnull align 8 dereferenceable(56) %17, ptr noundef nonnull align 8 dereferenceable(8) %8)
          to label %21 unwind label %30

21:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = icmp eq ptr %22, null
  br i1 %23, label %25, label %24

24:                                               ; preds = %21
  call void @_ZdlPvm(ptr noundef %22, i64 noundef 32) #6
  br label %25

25:                                               ; preds = %24, %21
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  call void @_ZNSt11unique_lockISt5mutexED2Ev(ptr noundef nonnull align 8 dereferenceable(9) %3) #5
  call void @llvm.lifetime.end.p0(i64 16, ptr %3) #5
  ret void

26:                                               ; preds = %1
  %27 = landingpad { ptr, i32 }
          cleanup
  %28 = extractvalue { ptr, i32 } %27, 0
  store ptr %28, ptr %6, align 8
  %29 = extractvalue { ptr, i32 } %27, 1
  store i32 %29, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  br label %34

30:                                               ; preds = %15
  %31 = landingpad { ptr, i32 }
          cleanup
  %32 = extractvalue { ptr, i32 } %31, 0
  store ptr %32, ptr %6, align 8
  %33 = extractvalue { ptr, i32 } %31, 1
  store i32 %33, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  br label %34

34:                                               ; preds = %30, %26
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  call void @_ZNSt11unique_lockISt5mutexED2Ev(ptr noundef nonnull align 8 dereferenceable(9) %3) #5
  call void @llvm.lifetime.end.p0(i64 16, ptr %3) #5
  br label %35

35:                                               ; preds = %34
  %36 = load ptr, ptr %6, align 8
  %37 = load i32, ptr %7, align 4
  %38 = insertvalue { ptr, i32 } poison, ptr %36, 0
  %39 = insertvalue { ptr, i32 } %38, i32 %37, 1
  resume { ptr, i32 } %39
}

attributes #0 = { nobuiltin 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { 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 = { 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 #5 = { nounwind }
attributes #6 = { builtin 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"}


; 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::unique_lock" = type <{ ptr, i8, [7 x i8] }>
%"class.std::thread::id" = type { i64 }

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 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: mustprogress uwtable
declare dso_local void @_ZNSt11unique_lockISt5mutexEC2ERS0_(ptr noundef nonnull align 8 dereferenceable(9), ptr noundef nonnull align 8 dereferenceable(40)) unnamed_addr #2 align 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: mustprogress nounwind uwtable
declare dso_local void @_ZNSt11unique_lockISt5mutexED2Ev(ptr noundef nonnull align 8 dereferenceable(9)) unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapINSt6thread2idEPN6TinyGC11ThreadStateESt4hashIS1_ESt8equal_toIS1_ESaISt4pairIKS1_S4_EEEixEOS1_(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local i64 @_ZNSt11this_thread6get_idEv() local_unnamed_addr #4

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNSt13unordered_mapINSt6thread2idEPN6TinyGC11ThreadStateESt4hashIS1_ESt8equal_toIS1_ESaISt4pairIKS1_S4_EEE5eraseERSA_(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN6TinyGC19DetachCurrentThreadEv(ptr noundef nonnull align 8 dereferenceable(220) %0) local_unnamed_addr #2 align 2 personality ptr @__gxx_personality_v0 {
  %2 = alloca %"class.std::unique_lock", align 8
  %3 = alloca %"class.std::thread::id", align 8
  %4 = alloca %"class.std::thread::id", align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #5
  %5 = getelementptr inbounds i8, ptr %0, i64 112
  call void @_ZNSt11unique_lockISt5mutexEC2ERS0_(ptr noundef nonnull align 8 dereferenceable(9) %2, ptr noundef nonnull align 8 dereferenceable(40) %5)
  %6 = getelementptr inbounds i8, ptr %0, i64 56
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #5
  %7 = call i64 @_ZNSt11this_thread6get_idEv() #5
  store i64 %7, ptr %3, align 8
  %8 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt13unordered_mapINSt6thread2idEPN6TinyGC11ThreadStateESt4hashIS1_ESt8equal_toIS1_ESaISt4pairIKS1_S4_EEEixEOS1_(ptr noundef nonnull align 8 dereferenceable(56) %6, ptr noundef nonnull align 8 dereferenceable(8) %3)
          to label %9 unwind label %17

9:                                                ; preds = %1
  %10 = load ptr, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #5
  %11 = call i64 @_ZNSt11this_thread6get_idEv() #5
  store i64 %11, ptr %4, align 8
  %12 = invoke noundef i64 @_ZNSt13unordered_mapINSt6thread2idEPN6TinyGC11ThreadStateESt4hashIS1_ESt8equal_toIS1_ESaISt4pairIKS1_S4_EEE5eraseERSA_(ptr noundef nonnull align 8 dereferenceable(56) %6, ptr noundef nonnull align 8 dereferenceable(8) %4)
          to label %13 unwind label %19

13:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #5
  %14 = icmp eq ptr %10, null
  br i1 %14, label %16, label %15

15:                                               ; preds = %13
  call void @_ZdlPvm(ptr noundef nonnull %10, i64 noundef 32) #6
  br label %16

16:                                               ; preds = %15, %13
  call void @_ZNSt11unique_lockISt5mutexED2Ev(ptr noundef nonnull align 8 dereferenceable(9) %2) #5
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %2) #5
  ret void

17:                                               ; preds = %1
  %18 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #5
  br label %21

19:                                               ; preds = %9
  %20 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #5
  br label %21

21:                                               ; preds = %19, %17
  %.pn = phi { ptr, i32 } [ %20, %19 ], [ %18, %17 ]
  call void @_ZNSt11unique_lockISt5mutexED2Ev(ptr noundef nonnull align 8 dereferenceable(9) %2) #5
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %2) #5
  resume { ptr, i32 } %.pn
}

attributes #0 = { nobuiltin 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { 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 = { 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 #5 = { nounwind }
attributes #6 = { builtin 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"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass