; LLVM IR from newbiediver/rioring :: examples/chatserver/pool.ll (ZN4pool14wait_for_leaveEv)

; 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::chrono::duration" = type { i64 }
%class.pool = type { %"class.rioring::critical_section", %"class.std::unordered_map" }
%"class.rioring::critical_section" = type { %"class.rioring::lock_base", %"class.std::mutex" }
%"class.rioring::lock_base" = type { 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 }
%"class.std::unordered_map" = 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 }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN4pool14wait_for_leaveEv(ptr noundef nonnull align 8 dereferenceable(104) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca %"class.std::chrono::duration", align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8
  br label %5

5:                                                ; preds = %9, %1
  %6 = getelementptr inbounds %class.pool, ptr %4, i32 0, i32 1
  %7 = call noundef zeroext i1 @_ZNKSt13unordered_mapImP6clientSt4hashImESt8equal_toImESaISt4pairIKmS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(56) %6) #4
  %8 = xor i1 %7, true
  br i1 %8, label %9, label %12

9:                                                ; preds = %5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %10 = call i64 @_ZNSt8literals15chrono_literalsli2msIJLc49EEEENSt6chrono8durationIlSt5ratioILl1ELl1000EEEEv()
  %11 = getelementptr inbounds %"class.std::chrono::duration", ptr %3, i32 0, i32 0
  store i64 %10, ptr %11, align 8
  call void @_ZNSt11this_thread9sleep_forIlSt5ratioILl1ELl1000EEEEvRKNSt6chrono8durationIT_T0_EE(ptr noundef nonnull align 8 dereferenceable(8) %3)
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  br label %5, !llvm.loop !9

12:                                               ; preds = %5
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt13unordered_mapImP6clientSt4hashImESt8equal_toImESaISt4pairIKmS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(56)) #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZNSt11this_thread9sleep_forIlSt5ratioILl1ELl1000EEEEvRKNSt6chrono8durationIT_T0_EE(ptr noundef nonnull align 8 dereferenceable(8)) #3

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZNSt8literals15chrono_literalsli2msIJLc49EEEENSt6chrono8durationIlSt5ratioILl1ELl1000EEEEv() #1

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 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 = distinct !{!9, !10}
!10 = !{!"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"

%"class.std::chrono::duration" = type { i64 }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN4pool14wait_for_leaveEv(ptr noundef nonnull align 8 dereferenceable(104) %0) local_unnamed_addr #1 align 2 {
  %2 = alloca %"class.std::chrono::duration", align 8
  %3 = getelementptr inbounds i8, ptr %0, i64 48
  %4 = tail call noundef zeroext i1 @_ZNKSt13unordered_mapImP6clientSt4hashImESt8equal_toImESaISt4pairIKmS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(56) %3) #4
  br i1 %4, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %.lr.ph
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %5 = call i64 @_ZNSt8literals15chrono_literalsli2msIJLc49EEEENSt6chrono8durationIlSt5ratioILl1ELl1000EEEEv()
  store i64 %5, ptr %2, align 8
  call void @_ZNSt11this_thread9sleep_forIlSt5ratioILl1ELl1000EEEEvRKNSt6chrono8durationIT_T0_EE(ptr noundef nonnull align 8 dereferenceable(8) %2)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  %6 = call noundef zeroext i1 @_ZNKSt13unordered_mapImP6clientSt4hashImESt8equal_toImESaISt4pairIKmS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(56) %3) #4
  br i1 %6, label %._crit_edge, label %.lr.ph, !llvm.loop !5

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt13unordered_mapImP6clientSt4hashImESt8equal_toImESaISt4pairIKmS1_EEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(56)) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZNSt11this_thread9sleep_forIlSt5ratioILl1ELl1000EEEEvRKNSt6chrono8durationIT_T0_EE(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #3

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZNSt8literals15chrono_literalsli2msIJLc49EEEENSt6chrono8durationIlSt5ratioILl1ELl1000EEEEv() local_unnamed_addr #1

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 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"}


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