; LLVM IR from dmr-goncalves/HumanAwareRobotNavigation :: src/spencer_people_tracking/detection/rgbd_detectors/rwth_upper_body_detector/src_0324f20e (5KNodeE)

; 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.KConnectedComponentLabeler::KLinkedList" = type <{ ptr, i32, [4 x i8] }>
%"class.KConnectedComponentLabeler::KNode" = type <{ ptr, ptr, ptr, i32, [4 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
define dso_local void @_ZN26KConnectedComponentLabeler11KLinkedList6SearchEiRPNS_5KNodeE(ptr noundef nonnull align 8 dereferenceable(12) %0, i32 noundef %1, ptr noundef nonnull align 8 dereferenceable(8) %2) #1 align 2 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !5
  %10 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %11 = getelementptr inbounds %"class.KConnectedComponentLabeler::KLinkedList", ptr %10, i32 0, i32 0
  %12 = load ptr, ptr %11, align 8, !tbaa !11
  store ptr %12, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %13 = getelementptr inbounds %"class.KConnectedComponentLabeler::KLinkedList", ptr %10, i32 0, i32 0
  %14 = load ptr, ptr %13, align 8, !tbaa !11
  store ptr %14, ptr %8, align 8, !tbaa !5
  br label %15

15:                                               ; preds = %37, %3
  br label %16

16:                                               ; preds = %29, %15
  %17 = load ptr, ptr %8, align 8, !tbaa !5
  %18 = getelementptr inbounds %"class.KConnectedComponentLabeler::KNode", ptr %17, i32 0, i32 3
  %19 = load i32, ptr %18, align 8, !tbaa !13
  %20 = load i32, ptr %5, align 4, !tbaa !9
  %21 = icmp eq i32 %19, %20
  br i1 %21, label %22, label %25

22:                                               ; preds = %16
  %23 = load ptr, ptr %7, align 8, !tbaa !5
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %23, ptr %24, align 8, !tbaa !5
  store i32 1, ptr %9, align 4
  br label %43

25:                                               ; preds = %16
  %26 = load ptr, ptr %8, align 8, !tbaa !5
  %27 = getelementptr inbounds %"class.KConnectedComponentLabeler::KNode", ptr %26, i32 0, i32 2
  %28 = load ptr, ptr %27, align 8, !tbaa !15
  store ptr %28, ptr %8, align 8, !tbaa !5
  br label %29

29:                                               ; preds = %25
  %30 = load ptr, ptr %8, align 8, !tbaa !5
  %31 = icmp ne ptr %30, null
  br i1 %31, label %16, label %32, !llvm.loop !16

32:                                               ; preds = %29
  %33 = load ptr, ptr %7, align 8, !tbaa !5
  %34 = getelementptr inbounds %"class.KConnectedComponentLabeler::KNode", ptr %33, i32 0, i32 1
  %35 = load ptr, ptr %34, align 8, !tbaa !18
  store ptr %35, ptr %7, align 8, !tbaa !5
  %36 = load ptr, ptr %7, align 8, !tbaa !5
  store ptr %36, ptr %8, align 8, !tbaa !5
  br label %37

37:                                               ; preds = %32
  %38 = load ptr, ptr %7, align 8, !tbaa !5
  %39 = icmp ne ptr %38, null
  br i1 %39, label %15, label %40, !llvm.loop !19

40:                                               ; preds = %37
  %41 = load ptr, ptr %7, align 8, !tbaa !5
  %42 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %41, ptr %42, align 8, !tbaa !5
  store i32 0, ptr %9, align 4
  br label %43

43:                                               ; preds = %40, %22
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  %44 = load i32, ptr %9, align 4
  switch i32 %44, label %46 [
    i32 0, label %45
    i32 1, label %45
  ]

45:                                               ; preds = %43, %43
  ret void

46:                                               ; preds = %43
  unreachable
}

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 = { 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTSN26KConnectedComponentLabeler11KLinkedListE", !6, i64 0, !10, i64 8}
!13 = !{!14, !10, i64 24}
!14 = !{!"_ZTSN26KConnectedComponentLabeler5KNodeE", !6, i64 8, !6, i64 16, !10, i64 24}
!15 = !{!14, !6, i64 16}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}
!18 = !{!14, !6, i64 8}
!19 = distinct !{!19, !17}


; 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 nofree norecurse nosync nounwind memory(read, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local void @_ZN26KConnectedComponentLabeler11KLinkedList6SearchEiRPNS_5KNodeE(ptr nocapture noundef nonnull readonly align 8 dereferenceable(12) %0, i32 noundef %1, ptr nocapture noundef nonnull writeonly align 8 dereferenceable(8) %2) local_unnamed_addr #0 align 2 {
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %13, %3
  %.0 = phi ptr [ %4, %3 ], [ %15, %13 ]
  br label %6

6:                                                ; preds = %10, %5
  %.1 = phi ptr [ %.0, %5 ], [ %12, %10 ]
  %7 = getelementptr inbounds i8, ptr %.1, i64 24
  %8 = load i32, ptr %7, align 8, !tbaa !11
  %9 = icmp eq i32 %8, %1
  br i1 %9, label %.loopexit, label %10

10:                                               ; preds = %6
  %11 = getelementptr inbounds i8, ptr %.1, i64 16
  %12 = load ptr, ptr %11, align 8, !tbaa !13
  %.not = icmp eq ptr %12, null
  br i1 %.not, label %13, label %6, !llvm.loop !14

13:                                               ; preds = %10
  %14 = getelementptr inbounds i8, ptr %.0, i64 8
  %15 = load ptr, ptr %14, align 8, !tbaa !16
  %.not15 = icmp eq ptr %15, null
  br i1 %.not15, label %.loopexit, label %5, !llvm.loop !17

.loopexit:                                        ; preds = %13, %6
  %storemerge = phi ptr [ %.0, %6 ], [ null, %13 ]
  store ptr %storemerge, ptr %2, align 8, !tbaa !18
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(read, argmem: readwrite, inaccessiblemem: none) 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 = !{!"_ZTSN26KConnectedComponentLabeler11KLinkedListE", !7, i64 0, !10, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!12, !10, i64 24}
!12 = !{!"_ZTSN26KConnectedComponentLabeler5KNodeE", !7, i64 8, !7, i64 16, !10, i64 24}
!13 = !{!12, !7, i64 16}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}
!16 = !{!12, !7, i64 8}
!17 = distinct !{!17, !15}
!18 = !{!7, !7, i64 0}


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