; LLVM IR from ETH3D/dataset-pipeline :: thirdparty/tinyxml2/tinyxml2.ll (ZNK8tinyxml27XMLNode16LastChildElementEPKc)

; 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN8tinyxml27XMLUtil11StringEqualEPKcS2_i(ptr noundef, ptr noundef, i32 noundef) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZNK8tinyxml210XMLElement4NameEv(ptr noundef nonnull align 8 dereferenceable(104)) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZNK8tinyxml27XMLNode16LastChildElementEPKc(ptr noundef nonnull align 8 dereferenceable(88) %0, ptr noundef %1) #2 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %9 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %10 = getelementptr inbounds %"class.tinyxml2::XMLNode", ptr %9, i32 0, i32 5
  %11 = load ptr, ptr %10, align 8, !tbaa !9
  store ptr %11, ptr %6, align 8, !tbaa !5
  br label %12

12:                                               ; preds = %39, %2
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = icmp ne ptr %13, null
  br i1 %14, label %16, label %15

15:                                               ; preds = %12
  store i32 2, ptr %7, align 4
  br label %43

16:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = load ptr, ptr %17, align 8, !tbaa !13
  %19 = getelementptr inbounds ptr, ptr %18, i64 6
  %20 = load ptr, ptr %19, align 8
  %21 = call noundef ptr %20(ptr noundef nonnull align 8 dereferenceable(88) %17)
  store ptr %21, ptr %8, align 8, !tbaa !5
  %22 = load ptr, ptr %8, align 8, !tbaa !5
  %23 = icmp ne ptr %22, null
  br i1 %23, label %24, label %35

24:                                               ; preds = %16
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = icmp ne ptr %25, null
  br i1 %26, label %27, label %32

27:                                               ; preds = %24
  %28 = load ptr, ptr %8, align 8, !tbaa !5
  %29 = call noundef ptr @_ZNK8tinyxml210XMLElement4NameEv(ptr noundef nonnull align 8 dereferenceable(104) %28)
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = call noundef zeroext i1 @_ZN8tinyxml27XMLUtil11StringEqualEPKcS2_i(ptr noundef %29, ptr noundef %30, i32 noundef 2147483647)
  br i1 %31, label %32, label %34

32:                                               ; preds = %27, %24
  %33 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %33, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %36

34:                                               ; preds = %27
  br label %35

35:                                               ; preds = %34, %16
  store i32 0, ptr %7, align 4
  br label %36

36:                                               ; preds = %35, %32
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %37 = load i32, ptr %7, align 4
  switch i32 %37, label %43 [
    i32 0, label %38
  ]

38:                                               ; preds = %36
  br label %39

39:                                               ; preds = %38
  %40 = load ptr, ptr %6, align 8, !tbaa !5
  %41 = getelementptr inbounds %"class.tinyxml2::XMLNode", ptr %40, i32 0, i32 6
  %42 = load ptr, ptr %41, align 8, !tbaa !15
  store ptr %42, ptr %6, align 8, !tbaa !5
  br label %12, !llvm.loop !16

43:                                               ; preds = %36, %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %44 = load i32, ptr %7, align 4
  switch i32 %44, label %48 [
    i32 2, label %45
    i32 1, label %46
  ]

45:                                               ; preds = %43
  store ptr null, ptr %3, align 8
  br label %46

46:                                               ; preds = %45, %43
  %47 = load ptr, ptr %3, align 8
  ret ptr %47

48:                                               ; preds = %43
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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, !6, i64 56}
!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 = !{!14, !14, i64 0}
!14 = !{!"vtable pointer", !8, i64 0}
!15 = !{!10, !6, i64 64}
!16 = distinct !{!16, !17}
!17 = !{!"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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN8tinyxml27XMLUtil11StringEqualEPKcS2_i(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZNK8tinyxml210XMLElement4NameEv(ptr noundef nonnull align 8 dereferenceable(104)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZNK8tinyxml27XMLNode16LastChildElementEPKc(ptr nocapture noundef nonnull readonly align 8 dereferenceable(88) %0, ptr noundef %1) local_unnamed_addr #1 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 56
  %.01320 = load ptr, ptr %3, align 8, !tbaa !5
  %.not21 = icmp eq ptr %.01320, null
  br i1 %.not21, label %.thread, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %.not17 = icmp eq ptr %1, null
  br i1 %.not17, label %.lr.ph.split.us, label %.lr.ph.split

.lr.ph.split.us:                                  ; preds = %.lr.ph, %8
  %.01322.us = phi ptr [ %.013.us, %8 ], [ %.01320, %.lr.ph ]
  %4 = load ptr, ptr %.01322.us, align 8, !tbaa !9
  %5 = getelementptr inbounds i8, ptr %4, i64 48
  %6 = load ptr, ptr %5, align 8
  %7 = tail call noundef ptr %6(ptr noundef nonnull align 8 dereferenceable(88) %.01322.us)
  %.not16.us = icmp eq ptr %7, null
  br i1 %.not16.us, label %8, label %.thread

8:                                                ; preds = %.lr.ph.split.us
  %9 = getelementptr inbounds i8, ptr %.01322.us, i64 64
  %.013.us = load ptr, ptr %9, align 8, !tbaa !5
  %.not.us = icmp eq ptr %.013.us, null
  br i1 %.not.us, label %.thread, label %.lr.ph.split.us, !llvm.loop !11

.lr.ph.split:                                     ; preds = %.lr.ph, %17
  %.01322 = phi ptr [ %.013, %17 ], [ %.01320, %.lr.ph ]
  %10 = load ptr, ptr %.01322, align 8, !tbaa !9
  %11 = getelementptr inbounds i8, ptr %10, i64 48
  %12 = load ptr, ptr %11, align 8
  %13 = tail call noundef ptr %12(ptr noundef nonnull align 8 dereferenceable(88) %.01322)
  %.not16 = icmp eq ptr %13, null
  br i1 %.not16, label %17, label %14

14:                                               ; preds = %.lr.ph.split
  %15 = tail call noundef ptr @_ZNK8tinyxml210XMLElement4NameEv(ptr noundef nonnull align 8 dereferenceable(104) %13)
  %16 = tail call noundef zeroext i1 @_ZN8tinyxml27XMLUtil11StringEqualEPKcS2_i(ptr noundef %15, ptr noundef nonnull %1, i32 noundef 2147483647)
  br i1 %16, label %.thread, label %17

17:                                               ; preds = %14, %.lr.ph.split
  %18 = getelementptr inbounds i8, ptr %.01322, i64 64
  %.013 = load ptr, ptr %18, align 8, !tbaa !5
  %.not = icmp eq ptr %.013, null
  br i1 %.not, label %.thread, label %.lr.ph.split, !llvm.loop !11

.thread:                                          ; preds = %17, %14, %8, %.lr.ph.split.us, %2
  %spec.select = phi ptr [ null, %2 ], [ %7, %.lr.ph.split.us ], [ null, %8 ], [ %13, %14 ], [ null, %17 ]
  ret ptr %spec.select
}

attributes #0 = { inlinehint 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 = !{!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"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass