; LLVM IR from HiroIshida/tinyfk :: urdf_parser/tinyxml/tinyxml.ll (ZNK11TiXmlHandle10FirstChildEv)

; 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.TiXmlHandle = 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 @_ZNK11TiXmlHandle10FirstChildEv(ptr dead_on_unwind noalias writable sret(%class.TiXmlHandle) align 8 %0, ptr noundef nonnull align 8 dereferenceable(8) %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8
  store ptr %1, ptr %4, align 8, !tbaa !5
  %7 = load ptr, ptr %4, align 8
  %8 = getelementptr inbounds %class.TiXmlHandle, ptr %7, i32 0, i32 0
  %9 = load ptr, ptr %8, align 8, !tbaa !9
  %10 = icmp ne ptr %9, null
  br i1 %10, label %11, label %23

11:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %12 = getelementptr inbounds %class.TiXmlHandle, ptr %7, i32 0, i32 0
  %13 = load ptr, ptr %12, align 8, !tbaa !9
  %14 = call noundef ptr @_ZN9TiXmlNode10FirstChildEv(ptr noundef nonnull align 8 dereferenceable(104) %13)
  store ptr %14, ptr %5, align 8, !tbaa !5
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = icmp ne ptr %15, null
  br i1 %16, label %17, label %19

17:                                               ; preds = %11
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  call void @_ZN11TiXmlHandleC2EP9TiXmlNode(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef %18)
  store i32 1, ptr %6, align 4
  br label %20

19:                                               ; preds = %11
  store i32 0, ptr %6, align 4
  br label %20

20:                                               ; preds = %19, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  %21 = load i32, ptr %6, align 4
  switch i32 %21, label %25 [
    i32 0, label %22
    i32 1, label %24
  ]

22:                                               ; preds = %20
  br label %23

23:                                               ; preds = %22, %2
  call void @_ZN11TiXmlHandleC2EP9TiXmlNode(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef null)
  br label %24

24:                                               ; preds = %23, %20
  ret void

25:                                               ; preds = %20
  unreachable
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN9TiXmlNode10FirstChildEv(ptr noundef nonnull align 8 dereferenceable(104)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN11TiXmlHandleC2EP9TiXmlNode(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) unnamed_addr #2 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 0}
!10 = !{!"_ZTS11TiXmlHandle", !6, 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.TiXmlHandle = type { ptr }

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZNK11TiXmlHandle10FirstChildEv(ptr dead_on_unwind noalias writable sret(%class.TiXmlHandle) align 8 %0, ptr nocapture noundef nonnull readonly align 8 dereferenceable(8) %1) local_unnamed_addr #0 align 2 {
  %3 = load ptr, ptr %1, align 8, !tbaa !5
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %.thread, label %4

4:                                                ; preds = %2
  %5 = tail call noundef ptr @_ZN9TiXmlNode10FirstChildEv(ptr noundef nonnull align 8 dereferenceable(104) %3)
  %.not5.not = icmp eq ptr %5, null
  br i1 %.not5.not, label %.thread, label %6

6:                                                ; preds = %4
  tail call void @_ZN11TiXmlHandleC2EP9TiXmlNode(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef nonnull %5)
  br label %7

.thread:                                          ; preds = %4, %2
  tail call void @_ZN11TiXmlHandleC2EP9TiXmlNode(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef null)
  br label %7

7:                                                ; preds = %6, %.thread
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN9TiXmlNode10FirstChildEv(ptr noundef nonnull align 8 dereferenceable(104)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN11TiXmlHandleC2EP9TiXmlNode(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) 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" }

!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 0}
!6 = !{!"_ZTS11TiXmlHandle", !7, i64 0}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass