; LLVM IR from facebook/redex :: libredex/ControlFlow.ll (ZN3cfg5Block4freeEv)

; 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.boost::intrusive::list_iterator" = type { %"struct.boost::intrusive::iiterator_members" }
%"struct.boost::intrusive::iiterator_members" = type { ptr }
%struct.MethodItemEntry = type { %"class.boost::intrusive::list_member_hook", i32, %union.anon.16 }
%"class.boost::intrusive::list_member_hook" = type { %"class.boost::intrusive::generic_hook" }
%"class.boost::intrusive::generic_hook" = type { %"struct.boost::intrusive::list_node" }
%"struct.boost::intrusive::list_node" = type { ptr, ptr }
%union.anon.16 = type { ptr }

; 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 @_ZN3cfg5Block4freeEv(ptr noundef nonnull align 8 dereferenceable(104) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca %"class.boost::intrusive::list_iterator", align 8
  %5 = alloca %"class.boost::intrusive::list_iterator", align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %7 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #6
  store ptr %7, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #6
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  call void @_ZN3cfg5Block5beginEv(ptr dead_on_unwind writable sret(%"class.boost::intrusive::list_iterator") align 8 %4, ptr noundef nonnull align 8 dereferenceable(104) %8)
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #6
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  call void @_ZN3cfg5Block3endEv(ptr dead_on_unwind writable sret(%"class.boost::intrusive::list_iterator") align 8 %5, ptr noundef nonnull align 8 dereferenceable(104) %9)
  br label %10

10:                                               ; preds = %41, %1
  %11 = call noundef zeroext i1 @_ZN5boost9intrusiveneERKNS0_13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb0EEES9_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5)
  br i1 %11, label %13, label %12

12:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #6
  br label %43

13:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #6
  %14 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNK5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb0EEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %4)
  store ptr %14, ptr %6, align 8, !tbaa !5
  %15 = load ptr, ptr %6, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.MethodItemEntry, ptr %15, i32 0, i32 1
  %17 = load i32, ptr %16, align 8, !tbaa !9
  switch i32 %17, label %39 [
    i32 2, label %18
    i32 3, label %27
  ]

18:                                               ; preds = %13
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.MethodItemEntry, ptr %19, i32 0, i32 2
  %21 = load ptr, ptr %20, align 8, !tbaa !15
  %22 = icmp eq ptr %21, null
  br i1 %22, label %24, label %23

23:                                               ; preds = %18
  call void @_ZN13IRInstructionD1Ev(ptr noundef nonnull align 8 dereferenceable(32) %21) #6
  call void @_ZdlPvm(ptr noundef %21, i64 noundef 32) #7
  br label %24

24:                                               ; preds = %23, %18
  %25 = load ptr, ptr %6, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.MethodItemEntry, ptr %25, i32 0, i32 2
  store ptr null, ptr %26, align 8, !tbaa !15
  br label %40

27:                                               ; preds = %13
  %28 = load ptr, ptr %6, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.MethodItemEntry, ptr %28, i32 0, i32 2
  %30 = load ptr, ptr %29, align 8, !tbaa !15
  %31 = icmp eq ptr %30, null
  br i1 %31, label %36, label %32

32:                                               ; preds = %27
  %33 = load ptr, ptr %30, align 8, !tbaa !16
  %34 = getelementptr inbounds ptr, ptr %33, i64 1
  %35 = load ptr, ptr %34, align 8
  call void %35(ptr noundef nonnull align 8 dereferenceable(24) %30) #6
  br label %36

36:                                               ; preds = %32, %27
  %37 = load ptr, ptr %6, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.MethodItemEntry, ptr %37, i32 0, i32 2
  store ptr null, ptr %38, align 8, !tbaa !15
  br label %40

39:                                               ; preds = %13
  br label %40

40:                                               ; preds = %39, %36, %24
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #6
  br label %41

41:                                               ; preds = %40
  %42 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb0EEppEv(ptr noundef nonnull align 8 dereferenceable(8) %4)
  br label %10

43:                                               ; preds = %12
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN3cfg5Block5beginEv(ptr dead_on_unwind noalias writable sret(%"class.boost::intrusive::list_iterator") align 8, ptr noundef nonnull align 8 dereferenceable(104)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN3cfg5Block3endEv(ptr dead_on_unwind noalias writable sret(%"class.boost::intrusive::list_iterator") align 8, ptr noundef nonnull align 8 dereferenceable(104)) #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN5boost9intrusiveneERKNS0_13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb0EEES9_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(32) ptr @_ZNK5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb0EEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: nounwind
declare void @_ZN13IRInstructionD1Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #3

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #4

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb0EEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #5 align 2

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 = { 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 #3 = { 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 #4 = { 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 #5 = { 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 #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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !14, i64 16}
!10 = !{!"_ZTS15MethodItemEntry", !11, i64 0, !14, i64 16, !7, i64 24}
!11 = !{!"_ZTSN5boost9intrusive16list_member_hookIJEEE", !12, i64 0}
!12 = !{!"_ZTSN5boost9intrusive12generic_hookILNS0_10algo_typesE0ENS0_16list_node_traitsIPvEENS0_10member_tagELNS0_14link_mode_typeE1ELNS0_14base_hook_typeE0EEE", !13, i64 0}
!13 = !{!"_ZTSN5boost9intrusive9list_nodeIPvEE", !6, i64 0, !6, i64 8}
!14 = !{!"_ZTS14MethodItemType", !7, i64 0}
!15 = !{!7, !7, i64 0}
!16 = !{!17, !17, i64 0}
!17 = !{!"vtable pointer", !8, i64 0}


; 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.boost::intrusive::list_iterator" = type { %"struct.boost::intrusive::iiterator_members" }
%"struct.boost::intrusive::iiterator_members" = type { ptr }

; 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 @_ZN3cfg5Block4freeEv(ptr noundef nonnull align 8 dereferenceable(104) %0) local_unnamed_addr #1 align 2 {
  %2 = alloca %"class.boost::intrusive::list_iterator", align 8
  %3 = alloca %"class.boost::intrusive::list_iterator", align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #6
  call void @_ZN3cfg5Block5beginEv(ptr dead_on_unwind nonnull writable sret(%"class.boost::intrusive::list_iterator") align 8 %2, ptr noundef nonnull align 8 dereferenceable(104) %0)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #6
  call void @_ZN3cfg5Block3endEv(ptr dead_on_unwind nonnull writable sret(%"class.boost::intrusive::list_iterator") align 8 %3, ptr noundef nonnull align 8 dereferenceable(104) %0)
  %4 = call noundef zeroext i1 @_ZN5boost9intrusiveneERKNS0_13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb0EEES9_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3)
  br i1 %4, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %21, %1
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #6
  ret void

.lr.ph:                                           ; preds = %1, %21
  %5 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNK5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb0EEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %2)
  %6 = getelementptr inbounds i8, ptr %5, i64 16
  %7 = load i32, ptr %6, align 8, !tbaa !5
  switch i32 %7, label %21 [
    i32 2, label %8
    i32 3, label %13
  ]

8:                                                ; preds = %.lr.ph
  %9 = getelementptr inbounds i8, ptr %5, i64 24
  %10 = load ptr, ptr %9, align 8, !tbaa !14
  %11 = icmp eq ptr %10, null
  br i1 %11, label %.sink.split, label %12

12:                                               ; preds = %8
  call void @_ZN13IRInstructionD1Ev(ptr noundef nonnull align 8 dereferenceable(32) %10) #6
  call void @_ZdlPvm(ptr noundef nonnull %10, i64 noundef 32) #7
  br label %.sink.split

13:                                               ; preds = %.lr.ph
  %14 = getelementptr inbounds i8, ptr %5, i64 24
  %15 = load ptr, ptr %14, align 8, !tbaa !14
  %16 = icmp eq ptr %15, null
  br i1 %16, label %.sink.split, label %17

17:                                               ; preds = %13
  %18 = load ptr, ptr %15, align 8, !tbaa !15
  %19 = getelementptr inbounds i8, ptr %18, i64 8
  %20 = load ptr, ptr %19, align 8
  call void %20(ptr noundef nonnull align 8 dereferenceable(24) %15) #6
  br label %.sink.split

.sink.split:                                      ; preds = %13, %17, %8, %12
  %.sink = phi ptr [ %9, %12 ], [ %9, %8 ], [ %14, %17 ], [ %14, %13 ]
  store ptr null, ptr %.sink, align 8, !tbaa !14
  br label %21

21:                                               ; preds = %.sink.split, %.lr.ph
  %22 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb0EEppEv(ptr noundef nonnull align 8 dereferenceable(8) %2)
  %23 = call noundef zeroext i1 @_ZN5boost9intrusiveneERKNS0_13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb0EEES9_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3)
  br i1 %23, label %.lr.ph, label %._crit_edge
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN3cfg5Block5beginEv(ptr dead_on_unwind noalias writable sret(%"class.boost::intrusive::list_iterator") align 8, ptr noundef nonnull align 8 dereferenceable(104)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN3cfg5Block3endEv(ptr dead_on_unwind noalias writable sret(%"class.boost::intrusive::list_iterator") align 8, ptr noundef nonnull align 8 dereferenceable(104)) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN5boost9intrusiveneERKNS0_13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb0EEES9_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(32) ptr @_ZNK5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb0EEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: nounwind
declare void @_ZN13IRInstructionD1Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #3

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) local_unnamed_addr #4

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN5boost9intrusive13list_iteratorINS0_8mhtraitsI15MethodItemEntryNS0_16list_member_hookIJEEEXadL_ZNS3_10list_hook_EEEEELb0EEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #5 align 2

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 = { 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 #3 = { 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 #4 = { 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 #5 = { 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 #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, !13, i64 16}
!6 = !{!"_ZTS15MethodItemEntry", !7, i64 0, !13, i64 16, !11, i64 24}
!7 = !{!"_ZTSN5boost9intrusive16list_member_hookIJEEE", !8, i64 0}
!8 = !{!"_ZTSN5boost9intrusive12generic_hookILNS0_10algo_typesE0ENS0_16list_node_traitsIPvEENS0_10member_tagELNS0_14link_mode_typeE1ELNS0_14base_hook_typeE0EEE", !9, i64 0}
!9 = !{!"_ZTSN5boost9intrusive9list_nodeIPvEE", !10, i64 0, !10, i64 8}
!10 = !{!"any pointer", !11, i64 0}
!11 = !{!"omnipotent char", !12, i64 0}
!12 = !{!"Simple C++ TBAA"}
!13 = !{!"_ZTS14MethodItemType", !11, i64 0}
!14 = !{!11, !11, i64 0}
!15 = !{!16, !16, i64 0}
!16 = !{!"vtable pointer", !12, i64 0}


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