; LLVM IR from yinqiwen/ardb :: src/common/channel/channel_pipeline.ll (ZN4ardb15ChannelPipeline5ClearEv)

; 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.btree::btree_iterator" = type <{ ptr, i32, [4 x i8] }>
%"struct.btree::btree_iterator.3" = type <{ ptr, i32, [4 x i8] }>
%"class.ardb::ChannelPipeline" = type { ptr, ptr, ptr, %"class.btree::btree_map" }
%"class.btree::btree_map" = type { %"class.btree::btree_map_container" }
%"class.btree::btree_map_container" = type { %"class.btree::btree_unique_container" }
%"class.btree::btree_unique_container" = type { %"class.btree::btree_container" }
%"class.btree::btree_container" = type { %"class.btree::btree" }
%"class.btree::btree" = type { %"struct.btree::btree<btree::btree_map_params<std::__cxx11::basic_string<char>, ardb::ChannelHandlerContext *, std::less<std::__cxx11::basic_string<char>>, std::allocator<std::pair<const std::__cxx11::basic_string<char>, ardb::ChannelHandlerContext *>>, 256>>::empty_base_handle" }
%"struct.btree::btree<btree::btree_map_params<std::__cxx11::basic_string<char>, ardb::ChannelHandlerContext *, std::less<std::__cxx11::basic_string<char>>, std::allocator<std::pair<const std::__cxx11::basic_string<char>, ardb::ChannelHandlerContext *>>, 256>>::empty_base_handle" = type { ptr }
%"struct.std::pair" = type { %"class.std::__cxx11::basic_string", ptr }
%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }

; 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: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN4ardb15ChannelPipeline5ClearEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #2 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca %"struct.btree::btree_iterator", align 8
  %4 = alloca %"struct.btree::btree_iterator.3", align 8
  %5 = alloca %"struct.btree::btree_iterator", align 8
  %6 = alloca ptr, align 8
  %7 = alloca %"struct.btree::btree_iterator", align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %8 = load ptr, ptr %2, align 8
  %9 = getelementptr inbounds %"class.ardb::ChannelPipeline", ptr %8, i32 0, i32 1
  store ptr null, ptr %9, align 8, !tbaa !9
  %10 = getelementptr inbounds %"class.ardb::ChannelPipeline", ptr %8, i32 0, i32 2
  store ptr null, ptr %10, align 8, !tbaa !17
  call void @llvm.lifetime.start.p0(i64 16, ptr %3) #5
  %11 = getelementptr inbounds %"class.ardb::ChannelPipeline", ptr %8, i32 0, i32 3
  call void @_ZN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEE5beginEv(ptr dead_on_unwind writable sret(%"struct.btree::btree_iterator") align 8 %3, ptr noundef nonnull align 8 dereferenceable(8) %11)
  br label %12

12:                                               ; preds = %25, %1
  call void @llvm.lifetime.start.p0(i64 16, ptr %4) #5
  call void @llvm.lifetime.start.p0(i64 16, ptr %5) #5
  %13 = getelementptr inbounds %"class.ardb::ChannelPipeline", ptr %8, i32 0, i32 3
  call void @_ZN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEE3endEv(ptr dead_on_unwind writable sret(%"struct.btree::btree_iterator") align 8 %5, ptr noundef nonnull align 8 dereferenceable(8) %13)
  call void @_ZN5btree14btree_iteratorIKNS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERKSG_PSL_EC2ERKNS0_ISJ_RSG_PSG_EE(ptr noundef nonnull align 8 dereferenceable(12) %4, ptr noundef nonnull align 8 dereferenceable(12) %5)
  %14 = call noundef zeroext i1 @_ZNK5btree14btree_iteratorINS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERSG_PSG_EneERKNS0_IKSJ_RKSG_PSO_EE(ptr noundef nonnull align 8 dereferenceable(12) %3, ptr noundef nonnull align 8 dereferenceable(12) %4)
  call void @llvm.lifetime.end.p0(i64 16, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 16, ptr %4) #5
  br i1 %14, label %15, label %26

15:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %16 = call noundef ptr @_ZNK5btree14btree_iteratorINS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERSG_PSG_EptEv(ptr noundef nonnull align 8 dereferenceable(12) %3)
  %17 = getelementptr inbounds %"struct.std::pair", ptr %16, i32 0, i32 1
  %18 = load ptr, ptr %17, align 8, !tbaa !18
  store ptr %18, ptr %6, align 8, !tbaa !5
  br label %19

19:                                               ; preds = %15
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  %21 = icmp eq ptr %20, null
  br i1 %21, label %23, label %22

22:                                               ; preds = %19
  call void @_ZN4ardb21ChannelHandlerContextD2Ev(ptr noundef nonnull align 8 dereferenceable(66) %20) #5
  call void @_ZdlPvm(ptr noundef %20, i64 noundef 72) #6
  br label %23

23:                                               ; preds = %22, %19
  store ptr null, ptr %6, align 8, !tbaa !5
  br label %24

24:                                               ; preds = %23
  br label %25

25:                                               ; preds = %24
  call void @llvm.lifetime.start.p0(i64 16, ptr %7) #5
  call void @_ZN5btree14btree_iteratorINS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERSG_PSG_EppEi(ptr dead_on_unwind writable sret(%"struct.btree::btree_iterator") align 8 %7, ptr noundef nonnull align 8 dereferenceable(12) %3, i32 noundef 0)
  call void @llvm.lifetime.end.p0(i64 16, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  br label %12, !llvm.loop !23

26:                                               ; preds = %12
  %27 = getelementptr inbounds %"class.ardb::ChannelPipeline", ptr %8, i32 0, i32 3
  call void @_ZN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEE5clearEv(ptr noundef nonnull align 8 dereferenceable(8) %27)
  call void @llvm.lifetime.end.p0(i64 16, ptr %3) #5
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEE5beginEv(ptr dead_on_unwind noalias writable sret(%"struct.btree::btree_iterator") align 8, ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNK5btree14btree_iteratorINS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERSG_PSG_EneERKNS0_IKSJ_RKSG_PSO_EE(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef nonnull align 8 dereferenceable(12)) #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEE3endEv(ptr dead_on_unwind noalias writable sret(%"struct.btree::btree_iterator") align 8, ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN5btree14btree_iteratorIKNS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERKSG_PSL_EC2ERKNS0_ISJ_RSG_PSG_EE(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef nonnull align 8 dereferenceable(12)) unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZNK5btree14btree_iteratorINS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERSG_PSG_EptEv(ptr noundef nonnull align 8 dereferenceable(12)) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN4ardb21ChannelHandlerContextD2Ev(ptr noundef nonnull align 8 dereferenceable(66)) unnamed_addr #4 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5btree14btree_iteratorINS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERSG_PSG_EppEi(ptr dead_on_unwind noalias writable sret(%"struct.btree::btree_iterator") align 8, ptr noundef nonnull align 8 dereferenceable(12), i32 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEE5clearEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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"}
!9 = !{!10, !6, i64 8}
!10 = !{!"_ZTSN4ardb15ChannelPipelineE", !6, i64 0, !6, i64 8, !6, i64 16, !11, i64 24}
!11 = !{!"_ZTSN5btree9btree_mapINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS6_ESaISt4pairIKS6_S9_EELi256EEE", !12, i64 0}
!12 = !{!"_ZTSN5btree19btree_map_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEEE", !13, i64 0}
!13 = !{!"_ZTSN5btree22btree_unique_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEEE", !14, i64 0}
!14 = !{!"_ZTSN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEEE", !15, i64 0}
!15 = !{!"_ZTSN5btree5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS7_ESaISt4pairIKS7_SA_EELi256EEEEE", !16, i64 0}
!16 = !{!"_ZTSN5btree5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS7_ESaISt4pairIKS7_SA_EELi256EEEE17empty_base_handleIS6_PNS_10btree_nodeISH_EEEE", !6, i64 0}
!17 = !{!10, !6, i64 16}
!18 = !{!19, !6, i64 32}
!19 = !{!"_ZTSSt4pairIKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextEE", !20, i64 0, !6, i64 32}
!20 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE", !21, i64 0, !22, i64 8, !7, i64 16}
!21 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_Alloc_hiderE", !6, i64 0}
!22 = !{!"long", !7, i64 0}
!23 = distinct !{!23, !24}
!24 = !{!"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.btree::btree_iterator" = type <{ ptr, i32, [4 x i8] }>
%"struct.btree::btree_iterator.3" = type <{ ptr, i32, [4 x i8] }>

; 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: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN4ardb15ChannelPipeline5ClearEv(ptr noundef nonnull align 8 dereferenceable(32) %0) local_unnamed_addr #2 align 2 {
  %2 = alloca %"struct.btree::btree_iterator", align 8
  %3 = alloca %"struct.btree::btree_iterator.3", align 8
  %4 = alloca %"struct.btree::btree_iterator", align 8
  %5 = alloca %"struct.btree::btree_iterator", align 8
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %6, i8 0, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #6
  %7 = getelementptr inbounds i8, ptr %0, i64 24
  call void @_ZN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEE5beginEv(ptr dead_on_unwind nonnull writable sret(%"struct.btree::btree_iterator") align 8 %2, ptr noundef nonnull align 8 dereferenceable(8) %7)
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #6
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %4) #6
  call void @_ZN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEE3endEv(ptr dead_on_unwind nonnull writable sret(%"struct.btree::btree_iterator") align 8 %4, ptr noundef nonnull align 8 dereferenceable(8) %7)
  call void @_ZN5btree14btree_iteratorIKNS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERKSG_PSL_EC2ERKNS0_ISJ_RSG_PSG_EE(ptr noundef nonnull align 8 dereferenceable(12) %3, ptr noundef nonnull align 8 dereferenceable(12) %4)
  %8 = call noundef zeroext i1 @_ZNK5btree14btree_iteratorINS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERSG_PSG_EneERKNS0_IKSJ_RKSG_PSO_EE(ptr noundef nonnull align 8 dereferenceable(12) %2, ptr noundef nonnull align 8 dereferenceable(12) %3)
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %4) #6
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %3) #6
  br i1 %8, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1, %14
  %9 = call noundef ptr @_ZNK5btree14btree_iteratorINS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERSG_PSG_EptEv(ptr noundef nonnull align 8 dereferenceable(12) %2)
  %10 = getelementptr inbounds i8, ptr %9, i64 32
  %11 = load ptr, ptr %10, align 8, !tbaa !5
  %12 = icmp eq ptr %11, null
  br i1 %12, label %14, label %13

13:                                               ; preds = %.lr.ph
  call void @_ZN4ardb21ChannelHandlerContextD2Ev(ptr noundef nonnull align 8 dereferenceable(66) %11) #6
  call void @_ZdlPvm(ptr noundef nonnull %11, i64 noundef 72) #7
  br label %14

14:                                               ; preds = %13, %.lr.ph
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %5) #6
  call void @_ZN5btree14btree_iteratorINS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERSG_PSG_EppEi(ptr dead_on_unwind nonnull writable sret(%"struct.btree::btree_iterator") align 8 %5, ptr noundef nonnull align 8 dereferenceable(12) %2, i32 noundef 0)
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %5) #6
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #6
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %4) #6
  call void @_ZN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEE3endEv(ptr dead_on_unwind nonnull writable sret(%"struct.btree::btree_iterator") align 8 %4, ptr noundef nonnull align 8 dereferenceable(8) %7)
  call void @_ZN5btree14btree_iteratorIKNS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERKSG_PSL_EC2ERKNS0_ISJ_RSG_PSG_EE(ptr noundef nonnull align 8 dereferenceable(12) %3, ptr noundef nonnull align 8 dereferenceable(12) %4)
  %15 = call noundef zeroext i1 @_ZNK5btree14btree_iteratorINS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERSG_PSG_EneERKNS0_IKSJ_RKSG_PSO_EE(ptr noundef nonnull align 8 dereferenceable(12) %2, ptr noundef nonnull align 8 dereferenceable(12) %3)
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %4) #6
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %3) #6
  br i1 %15, label %.lr.ph, label %._crit_edge, !llvm.loop !13

._crit_edge:                                      ; preds = %14, %1
  call void @_ZN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEE5clearEv(ptr noundef nonnull align 8 dereferenceable(8) %7)
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %2) #6
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEE5beginEv(ptr dead_on_unwind noalias writable sret(%"struct.btree::btree_iterator") align 8, ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNK5btree14btree_iteratorINS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERSG_PSG_EneERKNS0_IKSJ_RKSG_PSO_EE(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef nonnull align 8 dereferenceable(12)) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEE3endEv(ptr dead_on_unwind noalias writable sret(%"struct.btree::btree_iterator") align 8, ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN5btree14btree_iteratorIKNS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERKSG_PSL_EC2ERKNS0_ISJ_RSG_PSG_EE(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef nonnull align 8 dereferenceable(12)) unnamed_addr #3 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZNK5btree14btree_iteratorINS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERSG_PSG_EptEv(ptr noundef nonnull align 8 dereferenceable(12)) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN4ardb21ChannelHandlerContextD2Ev(ptr noundef nonnull align 8 dereferenceable(66)) unnamed_addr #4 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5btree14btree_iteratorINS_10btree_nodeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEERSG_PSG_EppEi(ptr dead_on_unwind noalias writable sret(%"struct.btree::btree_iterator") align 8, ptr noundef nonnull align 8 dereferenceable(12), i32 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5btree15btree_containerINS_5btreeINS_16btree_map_paramsINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextESt4lessIS8_ESaISt4pairIKS8_SB_EELi256EEEEEE5clearEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #5

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #6 = { nounwind }
attributes #7 = { 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, !9, i64 32}
!6 = !{!"_ZTSSt4pairIKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPN4ardb21ChannelHandlerContextEE", !7, i64 0, !9, i64 32}
!7 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE", !8, i64 0, !12, i64 8, !10, i64 16}
!8 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_Alloc_hiderE", !9, i64 0}
!9 = !{!"any pointer", !10, i64 0}
!10 = !{!"omnipotent char", !11, i64 0}
!11 = !{!"Simple C++ TBAA"}
!12 = !{!"long", !10, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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