; LLVM IR from JayXon/Leanify :: lib/pugixml/pugixml.ll (ZNK4pugi12xml_document16document_elementEv)

; 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.pugi::xml_node" = type { ptr }
%"struct.pugi::xml_node_struct" = type { i64, ptr, ptr, ptr, ptr, ptr, ptr, ptr }

@.str.1 = external hidden unnamed_addr constant [72 x i8], align 1
@.str.33 = external hidden unnamed_addr constant [6 x i8], align 1
@__PRETTY_FUNCTION__._ZNK4pugi12xml_document16document_elementEv = external hidden unnamed_addr constant [54 x i8], align 1

; 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: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local ptr @_ZNK4pugi12xml_document16document_elementEv(ptr noundef nonnull align 8 dereferenceable(208) %0) #2 align 2 {
  %2 = alloca %"class.pugi::xml_node", align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8
  %7 = getelementptr inbounds %"class.pugi::xml_node", ptr %6, i32 0, i32 0
  %8 = load ptr, ptr %7, align 8, !tbaa !9
  %9 = icmp ne ptr %8, null
  br i1 %9, label %10, label %11

10:                                               ; preds = %1
  br label %13

11:                                               ; preds = %1
  call void @__assert_fail(ptr noundef @.str.33, ptr noundef @.str.1, i32 noundef 7506, ptr noundef @__PRETTY_FUNCTION__._ZNK4pugi12xml_document16document_elementEv) #3
  unreachable

12:                                               ; No predecessors!
  br label %13

13:                                               ; preds = %12, %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %14 = getelementptr inbounds %"class.pugi::xml_node", ptr %6, i32 0, i32 0
  %15 = load ptr, ptr %14, align 8, !tbaa !9
  %16 = getelementptr inbounds %"struct.pugi::xml_node_struct", ptr %15, i32 0, i32 4
  %17 = load ptr, ptr %16, align 8, !tbaa !11
  store ptr %17, ptr %4, align 8, !tbaa !5
  br label %18

18:                                               ; preds = %32, %13
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = icmp ne ptr %19, null
  br i1 %20, label %22, label %21

21:                                               ; preds = %18
  store i32 2, ptr %5, align 4
  br label %36

22:                                               ; preds = %18
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = getelementptr inbounds %"struct.pugi::xml_node_struct", ptr %23, i32 0, i32 0
  %25 = load i64, ptr %24, align 8, !tbaa !14
  %26 = and i64 %25, 15
  %27 = trunc i64 %26 to i32
  %28 = icmp eq i32 %27, 2
  br i1 %28, label %29, label %31

29:                                               ; preds = %22
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  call void @_ZN4pugi8xml_nodeC1EPNS_15xml_node_structE(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef %30)
  store i32 1, ptr %5, align 4
  br label %36

31:                                               ; preds = %22
  br label %32

32:                                               ; preds = %31
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = getelementptr inbounds %"struct.pugi::xml_node_struct", ptr %33, i32 0, i32 6
  %35 = load ptr, ptr %34, align 8, !tbaa !15
  store ptr %35, ptr %4, align 8, !tbaa !5
  br label %18, !llvm.loop !16

36:                                               ; preds = %29, %21
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  %37 = load i32, ptr %5, align 4
  switch i32 %37, label %42 [
    i32 2, label %38
    i32 1, label %39
  ]

38:                                               ; preds = %36
  call void @_ZN4pugi8xml_nodeC1Ev(ptr noundef nonnull align 8 dereferenceable(8) %2)
  br label %39

39:                                               ; preds = %38, %36
  %40 = getelementptr inbounds %"class.pugi::xml_node", ptr %2, i32 0, i32 0
  %41 = load ptr, ptr %40, align 8
  ret ptr %41

42:                                               ; preds = %36
  unreachable
}

declare void @_ZN4pugi8xml_nodeC1Ev(ptr)

declare void @_ZN4pugi8xml_nodeC1EPNS_15xml_node_structE(ptr, ptr)

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { noreturn nounwind "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 = { noreturn nounwind }
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 = !{!10, !6, i64 0}
!10 = !{!"_ZTSN4pugi8xml_nodeE", !6, i64 0}
!11 = !{!12, !6, i64 32}
!12 = !{!"_ZTSN4pugi15xml_node_structE", !13, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !6, i64 48, !6, i64 56}
!13 = !{!"long", !7, i64 0}
!14 = !{!12, !13, i64 0}
!15 = !{!12, !6, i64 48}
!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"

%"class.pugi::xml_node" = type { ptr }

@.str.1 = external hidden unnamed_addr constant [72 x i8], align 1
@.str.33 = external hidden unnamed_addr constant [6 x i8], align 1
@__PRETTY_FUNCTION__._ZNK4pugi12xml_document16document_elementEv = external hidden unnamed_addr constant [54 x i8], align 1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local ptr @_ZNK4pugi12xml_document16document_elementEv(ptr nocapture noundef nonnull readonly align 8 dereferenceable(208) %0) local_unnamed_addr #1 align 2 {
  %2 = alloca %"class.pugi::xml_node", align 8
  %3 = load ptr, ptr %0, align 8, !tbaa !5
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %4, label %5

4:                                                ; preds = %1
  tail call void @__assert_fail(ptr noundef nonnull @.str.33, ptr noundef nonnull @.str.1, i32 noundef 7506, ptr noundef nonnull @__PRETTY_FUNCTION__._ZNK4pugi12xml_document16document_elementEv) #2
  unreachable

5:                                                ; preds = %1
  %6 = getelementptr inbounds i8, ptr %3, i64 32
  %.0512 = load ptr, ptr %6, align 8, !tbaa !10
  %.not713 = icmp eq ptr %.0512, null
  br i1 %.not713, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %5, %10
  %.0514 = phi ptr [ %.05, %10 ], [ %.0512, %5 ]
  %7 = load i64, ptr %.0514, align 8, !tbaa !11
  %8 = and i64 %7, 15
  %9 = icmp eq i64 %8, 2
  br i1 %9, label %12, label %10

10:                                               ; preds = %.lr.ph
  %11 = getelementptr inbounds i8, ptr %.0514, i64 48
  %.05 = load ptr, ptr %11, align 8, !tbaa !10
  %.not7 = icmp eq ptr %.05, null
  br i1 %.not7, label %._crit_edge, label %.lr.ph, !llvm.loop !14

12:                                               ; preds = %.lr.ph
  call void @_ZN4pugi8xml_nodeC1EPNS_15xml_node_structE(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull %.0514)
  br label %13

._crit_edge:                                      ; preds = %10, %5
  call void @_ZN4pugi8xml_nodeC1Ev(ptr noundef nonnull align 8 dereferenceable(8) %2)
  br label %13

13:                                               ; preds = %12, %._crit_edge
  %14 = load ptr, ptr %2, align 8
  ret ptr %14
}

declare void @_ZN4pugi8xml_nodeC1Ev(ptr) local_unnamed_addr

declare void @_ZN4pugi8xml_nodeC1EPNS_15xml_node_structE(ptr, ptr) local_unnamed_addr

attributes #0 = { noreturn nounwind "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" }
attributes #2 = { noreturn 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, !7, i64 0}
!6 = !{!"_ZTSN4pugi8xml_nodeE", !7, i64 0}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!7, !7, i64 0}
!11 = !{!12, !13, i64 0}
!12 = !{!"_ZTSN4pugi15xml_node_structE", !13, i64 0, !7, i64 8, !7, i64 16, !7, i64 24, !7, i64 32, !7, i64 40, !7, i64 48, !7, i64 56}
!13 = !{!"long", !8, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass