; LLVM IR from simbody/simbody :: SimTKcommon/src/Xml.ll (ZN5SimTK3Xml16element_iteratormmEv)

; 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.SimTK::Xml::element_iterator" = type { %"class.SimTK::Xml::node_iterator.base", %"class.SimTK::String" }
%"class.SimTK::Xml::node_iterator.base" = type <{ %"class.SimTK::Xml::Node", i32 }>
%"class.SimTK::Xml::Node" = type { ptr }
%"class.SimTK::String" = type { %"class.std::__cxx11::basic_string" }
%"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: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(216) ptr @_ZN5SimTK3Xml7Element12updTiElementEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare hidden noundef zeroext i1 @_ZL16elementIsAllowedRKN5SimTK6StringEPKNS_12TiXmlElementE(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef) #1

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef ptr @_ZNK5SimTK3Xml16element_iteratorptEv(ptr noundef nonnull align 8 dereferenceable(48)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5SimTK3Xml16element_iterator8reassignEPNS_12TiXmlElementE(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef) #3 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(48) ptr @_ZN5SimTK3Xml16element_iteratormmEv(ptr noundef nonnull align 8 dereferenceable(48) %0) #3 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 @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %5 = call noundef ptr @_ZNK5SimTK3Xml16element_iteratorptEv(ptr noundef nonnull align 8 dereferenceable(48) %4)
  %6 = call noundef nonnull align 8 dereferenceable(216) ptr @_ZN5SimTK3Xml7Element12updTiElementEv(ptr noundef nonnull align 8 dereferenceable(8) %5)
  %7 = call noundef ptr @_ZN5SimTK9TiXmlNode22PreviousSiblingElementEv(ptr noundef nonnull align 8 dereferenceable(104) %6)
  store ptr %7, ptr %3, align 8, !tbaa !5
  br label %8

8:                                                ; preds = %18, %1
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %11, label %16

11:                                               ; preds = %8
  %12 = getelementptr inbounds %"class.SimTK::Xml::element_iterator", ptr %4, i32 0, i32 1
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = call noundef zeroext i1 @_ZL16elementIsAllowedRKN5SimTK6StringEPKNS_12TiXmlElementE(ptr noundef nonnull align 8 dereferenceable(32) %12, ptr noundef %13)
  %15 = xor i1 %14, true
  br label %16

16:                                               ; preds = %11, %8
  %17 = phi i1 [ false, %8 ], [ %15, %11 ]
  br i1 %17, label %18, label %21

18:                                               ; preds = %16
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = call noundef ptr @_ZN5SimTK9TiXmlNode22PreviousSiblingElementEv(ptr noundef nonnull align 8 dereferenceable(104) %19)
  store ptr %20, ptr %3, align 8, !tbaa !5
  br label %8, !llvm.loop !9

21:                                               ; preds = %16
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  call void @_ZN5SimTK3Xml16element_iterator8reassignEPNS_12TiXmlElementE(ptr noundef nonnull align 8 dereferenceable(48) %4, ptr noundef %22)
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  ret ptr %4
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZN5SimTK9TiXmlNode22PreviousSiblingElementEv(ptr noundef nonnull align 8 dereferenceable(104)) #3 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 = { 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 = { 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 #4 = { 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 = distinct !{!9, !10}
!10 = !{!"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 noundef nonnull align 8 dereferenceable(216) ptr @_ZN5SimTK3Xml7Element12updTiElementEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare hidden noundef zeroext i1 @_ZL16elementIsAllowedRKN5SimTK6StringEPKNS_12TiXmlElementE(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef) local_unnamed_addr #0

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef ptr @_ZNK5SimTK3Xml16element_iteratorptEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5SimTK3Xml16element_iterator8reassignEPNS_12TiXmlElementE(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(48) ptr @_ZN5SimTK3Xml16element_iteratormmEv(ptr noundef nonnull returned align 8 dereferenceable(48) %0) local_unnamed_addr #2 align 2 {
  %2 = tail call noundef ptr @_ZNK5SimTK3Xml16element_iteratorptEv(ptr noundef nonnull align 8 dereferenceable(48) %0)
  %3 = tail call noundef nonnull align 8 dereferenceable(216) ptr @_ZN5SimTK3Xml7Element12updTiElementEv(ptr noundef nonnull align 8 dereferenceable(8) %2)
  %4 = tail call noundef ptr @_ZN5SimTK9TiXmlNode22PreviousSiblingElementEv(ptr noundef nonnull align 8 dereferenceable(104) %3)
  %.not5 = icmp eq ptr %4, null
  br i1 %.not5, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %1
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  br label %6

6:                                                ; preds = %.lr.ph, %8
  %.06 = phi ptr [ %4, %.lr.ph ], [ %9, %8 ]
  %7 = tail call noundef zeroext i1 @_ZL16elementIsAllowedRKN5SimTK6StringEPKNS_12TiXmlElementE(ptr noundef nonnull align 8 dereferenceable(32) %5, ptr noundef nonnull %.06)
  br i1 %7, label %.critedge, label %8

8:                                                ; preds = %6
  %9 = tail call noundef ptr @_ZN5SimTK9TiXmlNode22PreviousSiblingElementEv(ptr noundef nonnull align 8 dereferenceable(104) %.06)
  %.not = icmp eq ptr %9, null
  br i1 %.not, label %.critedge, label %6, !llvm.loop !5

.critedge:                                        ; preds = %6, %8, %1
  %.0.lcssa = phi ptr [ null, %1 ], [ null, %8 ], [ %.06, %6 ]
  tail call void @_ZN5SimTK3Xml16element_iterator8reassignEPNS_12TiXmlElementE(ptr noundef nonnull align 8 dereferenceable(48) %0, ptr noundef %.0.lcssa)
  ret ptr %0
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZN5SimTK9TiXmlNode22PreviousSiblingElementEv(ptr noundef nonnull align 8 dereferenceable(104)) local_unnamed_addr #2 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 = { 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 #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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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