; LLVM IR from HiroIshida/tinyfk :: urdf_parser/tinyxml/tinyxml.ll (ZN12TiXmlElement9ClearThisEv)

; 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.TiXmlElement = type { %class.TiXmlNode, %class.TiXmlAttributeSet }
%class.TiXmlNode = type { %class.TiXmlBase, ptr, i32, ptr, ptr, %"class.std::__cxx11::basic_string", ptr, ptr }
%class.TiXmlBase = type { ptr, %struct.TiXmlCursor, ptr }
%struct.TiXmlCursor = type { i32, i32 }
%"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] }
%class.TiXmlAttributeSet = type { %class.TiXmlAttribute }
%class.TiXmlAttribute = type { %class.TiXmlBase, ptr, %"class.std::__cxx11::basic_string", %"class.std::__cxx11::basic_string", ptr, 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 nounwind uwtable
declare dso_local void @_ZN9TiXmlNode5ClearEv(ptr noundef nonnull align 8 dereferenceable(104)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN17TiXmlAttributeSet6RemoveEP14TiXmlAttribute(ptr noundef nonnull align 8 dereferenceable(112), ptr noundef) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN12TiXmlElement9ClearThisEv(ptr noundef nonnull align 8 dereferenceable(216) %0) #2 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8
  call void @_ZN9TiXmlNode5ClearEv(ptr noundef nonnull align 8 dereferenceable(104) %4)
  br label %5

5:                                                ; preds = %20, %1
  %6 = getelementptr inbounds %class.TiXmlElement, ptr %4, i32 0, i32 1
  %7 = call noundef ptr @_ZN17TiXmlAttributeSet5FirstEv(ptr noundef nonnull align 8 dereferenceable(112) %6)
  %8 = icmp ne ptr %7, null
  br i1 %8, label %9, label %21

9:                                                ; preds = %5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %10 = getelementptr inbounds %class.TiXmlElement, ptr %4, i32 0, i32 1
  %11 = call noundef ptr @_ZN17TiXmlAttributeSet5FirstEv(ptr noundef nonnull align 8 dereferenceable(112) %10)
  store ptr %11, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %class.TiXmlElement, ptr %4, i32 0, i32 1
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  call void @_ZN17TiXmlAttributeSet6RemoveEP14TiXmlAttribute(ptr noundef nonnull align 8 dereferenceable(112) %12, ptr noundef %13)
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = icmp eq ptr %14, null
  br i1 %15, label %20, label %16

16:                                               ; preds = %9
  %17 = load ptr, ptr %14, align 8, !tbaa !9
  %18 = getelementptr inbounds ptr, ptr %17, i64 1
  %19 = load ptr, ptr %18, align 8
  call void %19(ptr noundef nonnull align 8 dereferenceable(112) %14) #3
  br label %20

20:                                               ; preds = %16, %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %5, !llvm.loop !11

21:                                               ; preds = %5
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN17TiXmlAttributeSet5FirstEv(ptr noundef nonnull align 8 dereferenceable(112)) #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = { 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
declare dso_local void @_ZN9TiXmlNode5ClearEv(ptr noundef nonnull align 8 dereferenceable(104)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN17TiXmlAttributeSet6RemoveEP14TiXmlAttribute(ptr noundef nonnull align 8 dereferenceable(112), ptr noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN12TiXmlElement9ClearThisEv(ptr noundef nonnull align 8 dereferenceable(216) %0) local_unnamed_addr #1 align 2 {
  tail call void @_ZN9TiXmlNode5ClearEv(ptr noundef nonnull align 8 dereferenceable(104) %0)
  %2 = getelementptr inbounds i8, ptr %0, i64 104
  %3 = tail call noundef ptr @_ZN17TiXmlAttributeSet5FirstEv(ptr noundef nonnull align 8 dereferenceable(112) %2)
  %.not3 = icmp eq ptr %3, null
  br i1 %.not3, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %10
  %4 = tail call noundef ptr @_ZN17TiXmlAttributeSet5FirstEv(ptr noundef nonnull align 8 dereferenceable(112) %2)
  tail call void @_ZN17TiXmlAttributeSet6RemoveEP14TiXmlAttribute(ptr noundef nonnull align 8 dereferenceable(112) %2, ptr noundef %4)
  %5 = icmp eq ptr %4, null
  br i1 %5, label %10, label %6

6:                                                ; preds = %.lr.ph
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %7, i64 8
  %9 = load ptr, ptr %8, align 8
  tail call void %9(ptr noundef nonnull align 8 dereferenceable(112) %4) #2
  br label %10

10:                                               ; preds = %6, %.lr.ph
  %11 = tail call noundef ptr @_ZN17TiXmlAttributeSet5FirstEv(ptr noundef nonnull align 8 dereferenceable(112) %2)
  %.not = icmp eq ptr %11, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !8

._crit_edge:                                      ; preds = %10, %1
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN17TiXmlAttributeSet5FirstEv(ptr noundef nonnull align 8 dereferenceable(112)) 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 = { 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 = { 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"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


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