; LLVM IR from ETH3D/dataset-pipeline :: thirdparty/tinyxml2/tinyxml2.ll (ZN8tinyxml27XMLNode14DeleteChildrenEv)

; 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.tinyxml2::XMLNode" = type { ptr, ptr, ptr, %"class.tinyxml2::StrPair", ptr, ptr, ptr, ptr, ptr }
%"class.tinyxml2::StrPair" = type { i32, 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 uwtable
define dso_local void @_ZN8tinyxml27XMLNode14DeleteChildrenEv(ptr noundef nonnull align 8 dereferenceable(88) %0) #1 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
  br label %5

5:                                                ; preds = %9, %1
  %6 = getelementptr inbounds %"class.tinyxml2::XMLNode", ptr %4, i32 0, i32 4
  %7 = load ptr, ptr %6, align 8, !tbaa !9
  %8 = icmp ne ptr %7, null
  br i1 %8, label %9, label %14

9:                                                ; preds = %5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %10 = getelementptr inbounds %"class.tinyxml2::XMLNode", ptr %4, i32 0, i32 4
  %11 = load ptr, ptr %10, align 8, !tbaa !9
  store ptr %11, ptr %3, align 8, !tbaa !5
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  call void @_ZN8tinyxml27XMLNode6UnlinkEPS0_(ptr noundef nonnull align 8 dereferenceable(88) %4, ptr noundef %12)
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  call void @_ZN8tinyxml27XMLNode10DeleteNodeEPS0_(ptr noundef %13)
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %5, !llvm.loop !13

14:                                               ; preds = %5
  %15 = getelementptr inbounds %"class.tinyxml2::XMLNode", ptr %4, i32 0, i32 5
  store ptr null, ptr %15, align 8, !tbaa !15
  %16 = getelementptr inbounds %"class.tinyxml2::XMLNode", ptr %4, i32 0, i32 4
  store ptr null, ptr %16, align 8, !tbaa !9
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN8tinyxml27XMLNode6UnlinkEPS0_(ptr noundef nonnull align 8 dereferenceable(88), ptr noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN8tinyxml27XMLNode10DeleteNodeEPS0_(ptr noundef) #1 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 = { 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 = { 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 48}
!10 = !{!"_ZTSN8tinyxml27XMLNodeE", !6, i64 8, !6, i64 16, !11, i64 24, !6, i64 48, !6, i64 56, !6, i64 64, !6, i64 72, !6, i64 80}
!11 = !{!"_ZTSN8tinyxml27StrPairE", !12, i64 0, !6, i64 8, !6, i64 16}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = !{!10, !6, i64 56}


; 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 uwtable
define dso_local void @_ZN8tinyxml27XMLNode14DeleteChildrenEv(ptr noundef nonnull align 8 dereferenceable(88) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 48
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %.not3 = icmp eq ptr %3, null
  br i1 %.not3, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %.lr.ph
  %4 = phi ptr [ %5, %.lr.ph ], [ %3, %1 ]
  tail call void @_ZN8tinyxml27XMLNode6UnlinkEPS0_(ptr noundef nonnull align 8 dereferenceable(88) %0, ptr noundef nonnull %4)
  tail call void @_ZN8tinyxml27XMLNode10DeleteNodeEPS0_(ptr noundef nonnull %4)
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %.not = icmp eq ptr %5, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !12

._crit_edge:                                      ; preds = %.lr.ph, %1
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %2, i8 0, i64 16, i1 false)
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN8tinyxml27XMLNode6UnlinkEPS0_(ptr noundef nonnull align 8 dereferenceable(88), ptr noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN8tinyxml27XMLNode10DeleteNodeEPS0_(ptr noundef) local_unnamed_addr #0 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

attributes #0 = { 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 #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 = { nocallback nofree nounwind willreturn memory(argmem: write) }

!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, !7, i64 48}
!6 = !{!"_ZTSN8tinyxml27XMLNodeE", !7, i64 8, !7, i64 16, !10, i64 24, !7, i64 48, !7, i64 56, !7, i64 64, !7, i64 72, !7, i64 80}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"_ZTSN8tinyxml27StrPairE", !11, i64 0, !7, i64 8, !7, i64 16}
!11 = !{!"int", !8, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


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