; LLVM IR from afrozchakure/Competitive-Programming-Solutions :: TopicWise/Linked List/IntersectionOfLinkedLists.ll (Z16findIntersectionP4NodeS0_)

; 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.std::map" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }
%struct.Node = type { i32, ptr }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z16findIntersectionP4NodeS0_(ptr noundef %0, ptr noundef %1) #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca %"class.std::map", align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 48, ptr %5) #3
  call void @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEC2Ev(ptr noundef nonnull align 8 dereferenceable(48) %5) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %12, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %13, ptr %7, align 8, !tbaa !5
  br label %14

14:                                               ; preds = %21, %2
  %15 = load ptr, ptr %6, align 8, !tbaa !5
  %16 = icmp ne ptr %15, null
  br i1 %16, label %17, label %31

17:                                               ; preds = %14
  %18 = load ptr, ptr %6, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.Node, ptr %18, i32 0, i32 0
  %20 = invoke noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) %5, ptr noundef nonnull align 4 dereferenceable(4) %19)
          to label %21 unwind label %27

21:                                               ; preds = %17
  %22 = load i32, ptr %20, align 4, !tbaa !9
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %20, align 4, !tbaa !9
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.Node, ptr %24, i32 0, i32 1
  %26 = load ptr, ptr %25, align 8, !tbaa !11
  store ptr %26, ptr %6, align 8, !tbaa !5
  br label %14, !llvm.loop !13

27:                                               ; preds = %35, %17
  %28 = landingpad { ptr, i32 }
          cleanup
  %29 = extractvalue { ptr, i32 } %28, 0
  store ptr %29, ptr %8, align 8
  %30 = extractvalue { ptr, i32 } %28, 1
  store i32 %30, ptr %9, align 4
  br label %71

31:                                               ; preds = %14
  br label %32

32:                                               ; preds = %39, %31
  %33 = load ptr, ptr %7, align 8, !tbaa !5
  %34 = icmp ne ptr %33, null
  br i1 %34, label %35, label %45

35:                                               ; preds = %32
  %36 = load ptr, ptr %7, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.Node, ptr %36, i32 0, i32 0
  %38 = invoke noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) %5, ptr noundef nonnull align 4 dereferenceable(4) %37)
          to label %39 unwind label %27

39:                                               ; preds = %35
  %40 = load i32, ptr %38, align 4, !tbaa !9
  %41 = add nsw i32 %40, 1
  store i32 %41, ptr %38, align 4, !tbaa !9
  %42 = load ptr, ptr %7, align 8, !tbaa !5
  %43 = getelementptr inbounds %struct.Node, ptr %42, i32 0, i32 1
  %44 = load ptr, ptr %43, align 8, !tbaa !11
  store ptr %44, ptr %7, align 8, !tbaa !5
  br label %32, !llvm.loop !15

45:                                               ; preds = %32
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  store ptr null, ptr %10, align 8, !tbaa !5
  %46 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %46, ptr %6, align 8, !tbaa !5
  br label %47

47:                                               ; preds = %65, %45
  %48 = load ptr, ptr %6, align 8, !tbaa !5
  %49 = icmp ne ptr %48, null
  br i1 %49, label %50, label %69

50:                                               ; preds = %47
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  %51 = load ptr, ptr %6, align 8, !tbaa !5
  %52 = getelementptr inbounds %struct.Node, ptr %51, i32 0, i32 0
  %53 = load i32, ptr %52, align 8, !tbaa !16
  store i32 %53, ptr %11, align 4, !tbaa !9
  %54 = invoke noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) %5, ptr noundef nonnull align 4 dereferenceable(4) %11)
          to label %55 unwind label %61

55:                                               ; preds = %50
  %56 = load i32, ptr %54, align 4, !tbaa !9
  %57 = icmp sgt i32 %56, 1
  br i1 %57, label %58, label %65

58:                                               ; preds = %55
  %59 = load i32, ptr %11, align 4, !tbaa !9
  invoke void @_Z4pushPP4Nodei(ptr noundef %10, i32 noundef %59)
          to label %60 unwind label %61

60:                                               ; preds = %58
  br label %65

61:                                               ; preds = %58, %50
  %62 = landingpad { ptr, i32 }
          cleanup
  %63 = extractvalue { ptr, i32 } %62, 0
  store ptr %63, ptr %8, align 8
  %64 = extractvalue { ptr, i32 } %62, 1
  store i32 %64, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  br label %71

65:                                               ; preds = %60, %55
  %66 = load ptr, ptr %6, align 8, !tbaa !5
  %67 = getelementptr inbounds %struct.Node, ptr %66, i32 0, i32 1
  %68 = load ptr, ptr %67, align 8, !tbaa !11
  store ptr %68, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  br label %47, !llvm.loop !17

69:                                               ; preds = %47
  %70 = load ptr, ptr %10, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEED2Ev(ptr noundef nonnull align 8 dereferenceable(48) %5) #3
  call void @llvm.lifetime.end.p0(i64 48, ptr %5) #3
  ret ptr %70

71:                                               ; preds = %61, %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEED2Ev(ptr noundef nonnull align 8 dereferenceable(48) %5) #3
  call void @llvm.lifetime.end.p0(i64 48, ptr %5) #3
  br label %72

72:                                               ; preds = %71
  %73 = load ptr, ptr %8, align 8
  %74 = load i32, ptr %9, align 4
  %75 = insertvalue { ptr, i32 } poison, ptr %73, 0
  %76 = insertvalue { ptr, i32 } %75, i32 %74, 1
  resume { ptr, i32 } %76
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z4pushPP4Nodei(ptr noundef, i32 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEC2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEED2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 8}
!12 = !{!"_ZTS4Node", !10, i64 0, !6, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}
!16 = !{!12, !10, i64 0}
!17 = distinct !{!17, !14}


; 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.std::map" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z16findIntersectionP4NodeS0_(ptr noundef %0, ptr noundef %1) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca %"class.std::map", align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 48, ptr nonnull %3) #3
  call void @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEC2Ev(ptr noundef nonnull align 8 dereferenceable(48) %3) #3
  %.not19 = icmp eq ptr %0, null
  br i1 %.not19, label %.preheader, label %.lr.ph

.preheader:                                       ; preds = %7, %2
  %.not1621 = icmp eq ptr %1, null
  br i1 %.not1621, label %._crit_edge, label %.lr.ph23

.lr.ph:                                           ; preds = %2, %7
  %.01520 = phi ptr [ %11, %7 ], [ %0, %2 ]
  %6 = invoke noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) %3, ptr noundef nonnull align 4 dereferenceable(4) %.01520)
          to label %7 unwind label %.loopexit.split-lp

7:                                                ; preds = %.lr.ph
  %8 = load i32, ptr %6, align 4, !tbaa !5
  %9 = add nsw i32 %8, 1
  store i32 %9, ptr %6, align 4, !tbaa !5
  %10 = getelementptr inbounds i8, ptr %.01520, i64 8
  %11 = load ptr, ptr %10, align 8, !tbaa !9
  %.not = icmp eq ptr %11, null
  br i1 %.not, label %.preheader, label %.lr.ph, !llvm.loop !12

.loopexit:                                        ; preds = %.lr.ph23
  %lpad.loopexit = landingpad { ptr, i32 }
          cleanup
  br label %31

.loopexit.split-lp:                               ; preds = %.lr.ph
  %lpad.loopexit.split-lp = landingpad { ptr, i32 }
          cleanup
  br label %31

.lr.ph23:                                         ; preds = %.preheader, %13
  %.01422 = phi ptr [ %17, %13 ], [ %1, %.preheader ]
  %12 = invoke noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) %3, ptr noundef nonnull align 4 dereferenceable(4) %.01422)
          to label %13 unwind label %.loopexit

13:                                               ; preds = %.lr.ph23
  %14 = load i32, ptr %12, align 4, !tbaa !5
  %15 = add nsw i32 %14, 1
  store i32 %15, ptr %12, align 4, !tbaa !5
  %16 = getelementptr inbounds i8, ptr %.01422, i64 8
  %17 = load ptr, ptr %16, align 8, !tbaa !9
  %.not16 = icmp eq ptr %17, null
  br i1 %.not16, label %._crit_edge, label %.lr.ph23, !llvm.loop !14

._crit_edge:                                      ; preds = %13, %.preheader
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  store ptr null, ptr %4, align 8, !tbaa !15
  br i1 %.not19, label %._crit_edge28, label %.lr.ph27

.lr.ph27:                                         ; preds = %._crit_edge, %27
  %.125 = phi ptr [ %29, %27 ], [ %0, %._crit_edge ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #3
  %18 = load i32, ptr %.125, align 8, !tbaa !16
  store i32 %18, ptr %5, align 4, !tbaa !5
  %19 = invoke noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) %3, ptr noundef nonnull align 4 dereferenceable(4) %5)
          to label %20 unwind label %25

20:                                               ; preds = %.lr.ph27
  %21 = load i32, ptr %19, align 4, !tbaa !5
  %22 = icmp sgt i32 %21, 1
  br i1 %22, label %23, label %27

23:                                               ; preds = %20
  %24 = load i32, ptr %5, align 4, !tbaa !5
  invoke void @_Z4pushPP4Nodei(ptr noundef nonnull %4, i32 noundef %24)
          to label %27 unwind label %25

25:                                               ; preds = %23, %.lr.ph27
  %26 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  br label %31

27:                                               ; preds = %23, %20
  %28 = getelementptr inbounds i8, ptr %.125, i64 8
  %29 = load ptr, ptr %28, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #3
  %.not17 = icmp eq ptr %29, null
  br i1 %.not17, label %._crit_edge28.loopexit, label %.lr.ph27, !llvm.loop !17

._crit_edge28.loopexit:                           ; preds = %27
  %.pre = load ptr, ptr %4, align 8, !tbaa !15
  br label %._crit_edge28

._crit_edge28:                                    ; preds = %._crit_edge28.loopexit, %._crit_edge
  %30 = phi ptr [ %.pre, %._crit_edge28.loopexit ], [ null, %._crit_edge ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  call void @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEED2Ev(ptr noundef nonnull align 8 dereferenceable(48) %3) #3
  call void @llvm.lifetime.end.p0(i64 48, ptr nonnull %3) #3
  ret ptr %30

31:                                               ; preds = %.loopexit, %.loopexit.split-lp, %25
  %.pn = phi { ptr, i32 } [ %26, %25 ], [ %lpad.loopexit, %.loopexit ], [ %lpad.loopexit.split-lp, %.loopexit.split-lp ]
  call void @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEED2Ev(ptr noundef nonnull align 8 dereferenceable(48) %3) #3
  call void @llvm.lifetime.end.p0(i64 48, ptr nonnull %3) #3
  resume { ptr, i32 } %.pn
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z4pushPP4Nodei(ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEC2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEED2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #2 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 8}
!10 = !{!"_ZTS4Node", !6, i64 0, !11, i64 8}
!11 = !{!"any pointer", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = distinct !{!14, !13}
!15 = !{!11, !11, i64 0}
!16 = !{!10, !6, i64 0}
!17 = distinct !{!17, !13}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass