; LLVM IR from sunkafei/xcpc-algorithm-templates :: 算法/树算法/动态点分治.ll (Z4DFS2ii)

; 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::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%"struct.std::pair" = type { i32, i32 }

@G = external dso_local global [110000 x %"class.std::vector"], align 16
@son = external dso_local global [110000 x i32], align 16
@father = external dso_local global [110000 x i32], align 16
@top = external dso_local global [110000 x i32], align 16

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm0EiiEONSt13tuple_elementIXT_ESt4pairIT0_T1_EE4typeEOS4_(ptr noundef nonnull align 4 dereferenceable(8)) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm1EiiEONSt13tuple_elementIXT_ESt4pairIT0_T1_EE4typeEOS4_(ptr noundef nonnull align 4 dereferenceable(8)) #1

; 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(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z4DFS2ii(i32 noundef %0, i32 noundef %1) #4 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %7 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %8 = alloca %"struct.std::pair", align 4
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [110000 x i32], ptr @top, i64 0, i64 %13
  store i32 %11, ptr %14, align 4, !tbaa !5
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [110000 x i32], ptr @son, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = icmp ne i32 %18, 0
  br i1 %19, label %20, label %26

20:                                               ; preds = %2
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [110000 x i32], ptr @son, i64 0, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %25 = load i32, ptr %4, align 4, !tbaa !5
  call void @_Z4DFS2ii(i32 noundef %24, i32 noundef %25)
  br label %26

26:                                               ; preds = %20, %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %27 = load i32, ptr %3, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [110000 x %"class.std::vector"], ptr @G, i64 0, i64 %28
  store ptr %29, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %30 = load ptr, ptr %5, align 8, !tbaa !9
  %31 = call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %30) #5
  %32 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %6, i32 0, i32 0
  store ptr %31, ptr %32, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #5
  %33 = load ptr, ptr %5, align 8, !tbaa !9
  %34 = call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %33) #5
  %35 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %7, i32 0, i32 0
  store ptr %34, ptr %35, align 8
  br label %36

36:                                               ; preds = %64, %26
  %37 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %7) #5
  br i1 %37, label %39, label %38

38:                                               ; preds = %36
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  br label %66

39:                                               ; preds = %36
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  %40 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #5
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %8, ptr align 4 %40, i64 8, i1 false)
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #5
  %41 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm0EiiEONSt13tuple_elementIXT_ESt4pairIT0_T1_EE4typeEOS4_(ptr noundef nonnull align 4 dereferenceable(8) %8) #5
  store ptr %41, ptr %9, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #5
  %42 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm1EiiEONSt13tuple_elementIXT_ESt4pairIT0_T1_EE4typeEOS4_(ptr noundef nonnull align 4 dereferenceable(8) %8) #5
  store ptr %42, ptr %10, align 8, !tbaa !9
  %43 = load ptr, ptr %9, align 8, !tbaa !9
  %44 = load i32, ptr %43, align 4, !tbaa !5
  %45 = load i32, ptr %3, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds [110000 x i32], ptr @father, i64 0, i64 %46
  %48 = load i32, ptr %47, align 4, !tbaa !5
  %49 = icmp ne i32 %44, %48
  br i1 %49, label %50, label %63

50:                                               ; preds = %39
  %51 = load ptr, ptr %9, align 8, !tbaa !9
  %52 = load i32, ptr %51, align 4, !tbaa !5
  %53 = load i32, ptr %3, align 4, !tbaa !5
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds [110000 x i32], ptr @son, i64 0, i64 %54
  %56 = load i32, ptr %55, align 4, !tbaa !5
  %57 = icmp ne i32 %52, %56
  br i1 %57, label %58, label %63

58:                                               ; preds = %50
  %59 = load ptr, ptr %9, align 8, !tbaa !9
  %60 = load i32, ptr %59, align 4, !tbaa !5
  %61 = load ptr, ptr %9, align 8, !tbaa !9
  %62 = load i32, ptr %61, align 4, !tbaa !5
  call void @_Z4DFS2ii(i32 noundef %60, i32 noundef %62)
  br label %63

63:                                               ; preds = %58, %50, %39
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  br label %64

64:                                               ; preds = %63
  %65 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #5
  br label %36

66:                                               ; preds = %38
  ret void
}

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 = { 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 #3 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 #5 = { 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, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}


; 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::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%"struct.std::pair" = type { i32, i32 }

@G = external dso_local global [110000 x %"class.std::vector"], align 16
@son = external dso_local local_unnamed_addr global [110000 x i32], align 16
@father = external dso_local local_unnamed_addr global [110000 x i32], align 16
@top = external dso_local local_unnamed_addr global [110000 x i32], align 16

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm0EiiEONSt13tuple_elementIXT_ESt4pairIT0_T1_EE4typeEOS4_(ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm1EiiEONSt13tuple_elementIXT_ESt4pairIT0_T1_EE4typeEOS4_(ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #1

; 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 nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z4DFS2ii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %4 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %5 = alloca %"struct.std::pair", align 8
  %6 = sext i32 %0 to i64
  %7 = getelementptr inbounds [110000 x i32], ptr @top, i64 0, i64 %6
  store i32 %1, ptr %7, align 4, !tbaa !5
  %8 = getelementptr inbounds [110000 x i32], ptr @son, i64 0, i64 %6
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %.not = icmp eq i32 %9, 0
  br i1 %.not, label %11, label %10

10:                                               ; preds = %2
  tail call void @_Z4DFS2ii(i32 noundef %9, i32 noundef %1)
  br label %11

11:                                               ; preds = %10, %2
  %12 = getelementptr inbounds [110000 x %"class.std::vector"], ptr @G, i64 0, i64 %6
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %13 = tail call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %12) #3
  store ptr %13, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %14 = tail call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %12) #3
  store ptr %14, ptr %4, align 8
  %15 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  br i1 %15, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %11
  %16 = getelementptr inbounds [110000 x i32], ptr @father, i64 0, i64 %6
  br label %17

._crit_edge:                                      ; preds = %27, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  ret void

17:                                               ; preds = %.lr.ph, %27
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #3
  %18 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %19 = load i64, ptr %18, align 4
  store i64 %19, ptr %5, align 8
  %20 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm0EiiEONSt13tuple_elementIXT_ESt4pairIT0_T1_EE4typeEOS4_(ptr noundef nonnull align 4 dereferenceable(8) %5) #3
  %21 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm1EiiEONSt13tuple_elementIXT_ESt4pairIT0_T1_EE4typeEOS4_(ptr noundef nonnull align 4 dereferenceable(8) %5) #3
  %22 = load i32, ptr %20, align 4, !tbaa !5
  %23 = load i32, ptr %16, align 4, !tbaa !5
  %.not14 = icmp eq i32 %22, %23
  br i1 %.not14, label %27, label %24

24:                                               ; preds = %17
  %25 = load i32, ptr %8, align 4, !tbaa !5
  %.not15 = icmp eq i32 %22, %25
  br i1 %.not15, label %27, label %26

26:                                               ; preds = %24
  call void @_Z4DFS2ii(i32 noundef %22, i32 noundef %22)
  br label %27

27:                                               ; preds = %26, %24, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  %28 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %29 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  br i1 %29, label %17, label %._crit_edge
}

attributes #0 = { mustprogress 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 = { 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 #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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass