; LLVM IR from simbody/simbody :: SimTKcommon/src/Xml.ll (ZN5SimTK3Xml7Element13element_beginERKNS_6StringE)

; 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(104) ptr @_ZN5SimTK3Xml4Node9updTiNodeEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN5SimTK3Xml7Element13element_beginERKNS_6StringE(ptr dead_on_unwind noalias writable sret(%"class.SimTK::Xml::element_iterator") align 8 %0, ptr noundef nonnull align 8 dereferenceable(8) %1, ptr noundef nonnull align 8 dereferenceable(32) %2) #2 align 2 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  %8 = load ptr, ptr %5, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %9 = call noundef nonnull align 8 dereferenceable(104) ptr @_ZN5SimTK3Xml4Node9updTiNodeEv(ptr noundef nonnull align 8 dereferenceable(8) %8)
  %10 = call noundef ptr @_ZN5SimTK9TiXmlNode17FirstChildElementEv(ptr noundef nonnull align 8 dereferenceable(104) %9)
  store ptr %10, ptr %7, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %21, %3
  %12 = load ptr, ptr %7, align 8, !tbaa !5
  %13 = icmp ne ptr %12, null
  br i1 %13, label %14, label %19

14:                                               ; preds = %11
  %15 = load ptr, ptr %6, align 8, !tbaa !5
  %16 = load ptr, ptr %7, align 8, !tbaa !5
  %17 = call noundef zeroext i1 @_ZL16elementIsAllowedRKN5SimTK6StringEPKNS_12TiXmlElementE(ptr noundef nonnull align 8 dereferenceable(32) %15, ptr noundef %16)
  %18 = xor i1 %17, true
  br label %19

19:                                               ; preds = %14, %11
  %20 = phi i1 [ false, %11 ], [ %18, %14 ]
  br i1 %20, label %21, label %24

21:                                               ; preds = %19
  %22 = load ptr, ptr %7, align 8, !tbaa !5
  %23 = call noundef ptr @_ZN5SimTK9TiXmlNode18NextSiblingElementEv(ptr noundef nonnull align 8 dereferenceable(104) %22)
  store ptr %23, ptr %7, align 8, !tbaa !5
  br label %11, !llvm.loop !9

24:                                               ; preds = %19
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = load ptr, ptr %6, align 8, !tbaa !5
  call void @_ZN5SimTK3Xml16element_iteratorC2EPNS_12TiXmlElementERKNS_6StringE(ptr noundef nonnull align 8 dereferenceable(48) %0, ptr noundef %25, ptr noundef nonnull align 8 dereferenceable(32) %26)
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZN5SimTK9TiXmlNode17FirstChildElementEv(ptr noundef nonnull align 8 dereferenceable(104)) #2 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: mustprogress uwtable
declare dso_local noundef ptr @_ZN5SimTK9TiXmlNode18NextSiblingElementEv(ptr noundef nonnull align 8 dereferenceable(104)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5SimTK3Xml16element_iteratorC2EPNS_12TiXmlElementERKNS_6StringE(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef, ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 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 = 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"

%"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: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(104) ptr @_ZN5SimTK3Xml4Node9updTiNodeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN5SimTK3Xml7Element13element_beginERKNS_6StringE(ptr dead_on_unwind noalias writable sret(%"class.SimTK::Xml::element_iterator") align 8 %0, ptr noundef nonnull align 8 dereferenceable(8) %1, ptr noundef nonnull align 8 dereferenceable(32) %2) local_unnamed_addr #1 align 2 {
  %4 = tail call noundef nonnull align 8 dereferenceable(104) ptr @_ZN5SimTK3Xml4Node9updTiNodeEv(ptr noundef nonnull align 8 dereferenceable(8) %1)
  %5 = tail call noundef ptr @_ZN5SimTK9TiXmlNode17FirstChildElementEv(ptr noundef nonnull align 8 dereferenceable(104) %4)
  %.not7 = icmp eq ptr %5, null
  br i1 %.not7, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %7
  %.08 = phi ptr [ %8, %7 ], [ %5, %3 ]
  %6 = tail call noundef zeroext i1 @_ZL16elementIsAllowedRKN5SimTK6StringEPKNS_12TiXmlElementE(ptr noundef nonnull align 8 dereferenceable(32) %2, ptr noundef nonnull %.08)
  br i1 %6, label %.critedge, label %7

7:                                                ; preds = %.lr.ph
  %8 = tail call noundef ptr @_ZN5SimTK9TiXmlNode18NextSiblingElementEv(ptr noundef nonnull align 8 dereferenceable(104) %.08)
  %.not = icmp eq ptr %8, null
  br i1 %.not, label %.critedge, label %.lr.ph, !llvm.loop !5

.critedge:                                        ; preds = %.lr.ph, %7, %3
  %.0.lcssa = phi ptr [ null, %3 ], [ null, %7 ], [ %.08, %.lr.ph ]
  tail call void @_ZN5SimTK3Xml16element_iteratorC2EPNS_12TiXmlElementERKNS_6StringE(ptr noundef nonnull align 8 dereferenceable(48) %0, ptr noundef %.0.lcssa, ptr noundef nonnull align 8 dereferenceable(32) %2)
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZN5SimTK9TiXmlNode17FirstChildElementEv(ptr noundef nonnull align 8 dereferenceable(104)) local_unnamed_addr #1 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: mustprogress uwtable
declare dso_local noundef ptr @_ZN5SimTK9TiXmlNode18NextSiblingElementEv(ptr noundef nonnull align 8 dereferenceable(104)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5SimTK3Xml16element_iteratorC2EPNS_12TiXmlElementERKNS_6StringE(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef, ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 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" }

!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,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass