; LLVM IR from xirc/cp-algorithm :: atcoder/typical90/C (main)

; 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::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%class.TreeDiameter = type { i64, %"class.std::vector", i64 }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::vector<TreeDiameter::edge>, std::allocator<std::vector<TreeDiameter::edge>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<TreeDiameter::edge>, std::allocator<std::vector<TreeDiameter::edge>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<TreeDiameter::edge>, std::allocator<std::vector<TreeDiameter::edge>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<TreeDiameter::edge>, std::allocator<std::vector<TreeDiameter::edge>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::tuple" = type { %"struct.std::_Tuple_impl" }
%"struct.std::_Tuple_impl" = type { %"struct.std::_Tuple_impl.0", %"struct.std::_Head_base.3" }
%"struct.std::_Tuple_impl.0" = type { %"struct.std::_Tuple_impl.1", %"struct.std::_Head_base.2" }
%"struct.std::_Tuple_impl.1" = type { %"struct.std::_Head_base" }
%"struct.std::_Head_base" = type { i64 }
%"struct.std::_Head_base.2" = type { i64 }
%"struct.std::_Head_base.3" = type { i64 }
%"class.std::tuple.4" = type { %"struct.std::_Tuple_impl.5" }
%"struct.std::_Tuple_impl.5" = type { %"struct.std::_Tuple_impl.6", %"struct.std::_Head_base.10" }
%"struct.std::_Tuple_impl.6" = type { %"struct.std::_Tuple_impl.7", %"struct.std::_Head_base.9" }
%"struct.std::_Tuple_impl.7" = type { %"struct.std::_Head_base.8" }
%"struct.std::_Head_base.8" = type { ptr }
%"struct.std::_Head_base.9" = type { ptr }
%"struct.std::_Head_base.10" = type { ptr }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca %class.TreeDiameter, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  %11 = alloca i64, align 8
  %12 = alloca %"class.std::tuple", align 8
  %13 = alloca %"class.std::tuple.4", align 8
  store i32 0, ptr %1, align 4
  %14 = call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %15 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %16 = getelementptr i8, ptr %15, i64 -24
  %17 = load i64, ptr %16, align 8
  %18 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %17
  %19 = call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %18, ptr noundef null)
  %20 = load ptr, ptr @_ZSt4cout, align 8, !tbaa !5
  %21 = getelementptr i8, ptr %20, i64 -24
  %22 = load i64, ptr %21, align 8
  %23 = getelementptr inbounds i8, ptr @_ZSt4cout, i64 %22
  %24 = call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %23, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #7
  %25 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %2)
  call void @llvm.lifetime.start.p0(i64 40, ptr %3) #7
  %26 = load i32, ptr %2, align 4, !tbaa !8
  %27 = sext i32 %26 to i64
  %28 = call noundef i64 @_ZNSt14numeric_limitsImE3maxEv() #7
  call void @_ZN12TreeDiameterC2Emm(ptr noundef nonnull align 8 dereferenceable(40) %3, i64 noundef %27, i64 noundef %28)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #7
  store i32 0, ptr %4, align 4, !tbaa !8
  br label %29

29:                                               ; preds = %49, %0
  %30 = load i32, ptr %4, align 4, !tbaa !8
  %31 = load i32, ptr %2, align 4, !tbaa !8
  %32 = sub nsw i32 %31, 1
  %33 = icmp slt i32 %30, %32
  br i1 %33, label %35, label %34

34:                                               ; preds = %29
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #7
  br label %56

35:                                               ; preds = %29
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #7
  %36 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %5)
          to label %37 unwind label %52

37:                                               ; preds = %35
  %38 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %36, ptr noundef nonnull align 4 dereferenceable(4) %6)
          to label %39 unwind label %52

39:                                               ; preds = %37
  %40 = load i32, ptr %5, align 4, !tbaa !8
  %41 = add nsw i32 %40, -1
  store i32 %41, ptr %5, align 4, !tbaa !8
  %42 = load i32, ptr %6, align 4, !tbaa !8
  %43 = add nsw i32 %42, -1
  store i32 %43, ptr %6, align 4, !tbaa !8
  %44 = load i32, ptr %5, align 4, !tbaa !8
  %45 = sext i32 %44 to i64
  %46 = load i32, ptr %6, align 4, !tbaa !8
  %47 = sext i32 %46 to i64
  invoke void @_ZN12TreeDiameter8add_edgeEmmm(ptr noundef nonnull align 8 dereferenceable(40) %3, i64 noundef %45, i64 noundef %47, i64 noundef 1)
          to label %48 unwind label %52

48:                                               ; preds = %39
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #7
  br label %49

49:                                               ; preds = %48
  %50 = load i32, ptr %4, align 4, !tbaa !8
  %51 = add nsw i32 %50, 1
  store i32 %51, ptr %4, align 4, !tbaa !8
  br label %29, !llvm.loop !11

52:                                               ; preds = %39, %37, %35
  %53 = landingpad { ptr, i32 }
          cleanup
  %54 = extractvalue { ptr, i32 } %53, 0
  store ptr %54, ptr %7, align 8
  %55 = extractvalue { ptr, i32 } %53, 1
  store i32 %55, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #7
  br label %75

56:                                               ; preds = %34
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #7
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #7
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #7
  call void @llvm.lifetime.start.p0(i64 24, ptr %12) #7
  invoke void @_ZNK12TreeDiameter5solveEm(ptr dead_on_unwind writable sret(%"class.std::tuple") align 8 %12, ptr noundef nonnull align 8 dereferenceable(40) %3, i64 noundef 0)
          to label %57 unwind label %66

57:                                               ; preds = %56
  call void @llvm.lifetime.start.p0(i64 24, ptr %13) #7
  call void @_ZSt3tieIJmmmEESt5tupleIJDpRT_EES3_(ptr dead_on_unwind writable sret(%"class.std::tuple.4") align 8 %13, ptr noundef nonnull align 8 dereferenceable(8) %9, ptr noundef nonnull align 8 dereferenceable(8) %10, ptr noundef nonnull align 8 dereferenceable(8) %11) #7
  %58 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt5tupleIJRmS0_S0_EEaSIJmmmEEENSt9enable_ifIXcl12__assignableIDpT_EEERS1_E4typeEOS_IJS5_EE(ptr noundef nonnull align 8 dereferenceable(24) %13, ptr noundef nonnull align 8 dereferenceable(24) %12) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr %13) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr %12) #7
  %59 = load i64, ptr %11, align 8, !tbaa !13
  %60 = add i64 %59, 1
  %61 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEm(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %60)
          to label %62 unwind label %70

62:                                               ; preds = %57
  %63 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %61, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
          to label %64 unwind label %70

64:                                               ; preds = %62
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #7
  call void @_ZN12TreeDiameterD2Ev(ptr noundef nonnull align 8 dereferenceable(40) %3) #7
  call void @llvm.lifetime.end.p0(i64 40, ptr %3) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #7
  %65 = load i32, ptr %1, align 4
  ret i32 %65

66:                                               ; preds = %56
  %67 = landingpad { ptr, i32 }
          cleanup
  %68 = extractvalue { ptr, i32 } %67, 0
  store ptr %68, ptr %7, align 8
  %69 = extractvalue { ptr, i32 } %67, 1
  store i32 %69, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 24, ptr %12) #7
  br label %74

70:                                               ; preds = %62, %57
  %71 = landingpad { ptr, i32 }
          cleanup
  %72 = extractvalue { ptr, i32 } %71, 0
  store ptr %72, ptr %7, align 8
  %73 = extractvalue { ptr, i32 } %71, 1
  store i32 %73, ptr %8, align 4
  br label %74

74:                                               ; preds = %70, %66
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #7
  br label %75

75:                                               ; preds = %74, %52
  call void @_ZN12TreeDiameterD2Ev(ptr noundef nonnull align 8 dereferenceable(40) %3) #7
  call void @llvm.lifetime.end.p0(i64 40, ptr %3) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #7
  br label %76

76:                                               ; preds = %75
  %77 = load ptr, ptr %7, align 8
  %78 = load i32, ptr %8, align 4
  %79 = insertvalue { ptr, i32 } poison, ptr %77, 0
  %80 = insertvalue { ptr, i32 } %79, i32 %78, 1
  resume { ptr, i32 } %80
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNSt14numeric_limitsImE3maxEv() #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN12TreeDiameterC2Emm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef, i64 noundef) unnamed_addr #4 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN12TreeDiameter8add_edgeEmmm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef, i64 noundef, i64 noundef) #4 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK12TreeDiameter5solveEm(ptr dead_on_unwind noalias writable sret(%"class.std::tuple") align 8, ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) #4 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZSt3tieIJmmmEESt5tupleIJDpRT_EES3_(ptr dead_on_unwind noalias writable sret(%"class.std::tuple.4") align 8, ptr noundef nonnull align 8 dereferenceable(8), 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 8 dereferenceable(24) ptr @_ZNSt5tupleIJRmS0_S0_EEaSIJmmmEEENSt9enable_ifIXcl12__assignableIDpT_EEERS1_E4typeEOS_IJS5_EE(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEm(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) #4 align 2

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #5

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN12TreeDiameterD2Ev(ptr noundef nonnull align 8 dereferenceable(40)) unnamed_addr #6 align 2

attributes #0 = { mustprogress norecurse 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 = { "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 = { nocallback nofree nosync 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 = { inlinehint 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 #6 = { 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 #7 = { 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !10, i64 0}
!10 = !{!"omnipotent char", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!14, !14, i64 0}
!14 = !{!"long", !10, 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::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%class.TreeDiameter = type { i64, %"class.std::vector", i64 }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::vector<TreeDiameter::edge>, std::allocator<std::vector<TreeDiameter::edge>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<TreeDiameter::edge>, std::allocator<std::vector<TreeDiameter::edge>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<TreeDiameter::edge>, std::allocator<std::vector<TreeDiameter::edge>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<TreeDiameter::edge>, std::allocator<std::vector<TreeDiameter::edge>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::tuple" = type { %"struct.std::_Tuple_impl" }
%"struct.std::_Tuple_impl" = type { %"struct.std::_Tuple_impl.0", %"struct.std::_Head_base.3" }
%"struct.std::_Tuple_impl.0" = type { %"struct.std::_Tuple_impl.1", %"struct.std::_Head_base.2" }
%"struct.std::_Tuple_impl.1" = type { %"struct.std::_Head_base" }
%"struct.std::_Head_base" = type { i64 }
%"struct.std::_Head_base.2" = type { i64 }
%"struct.std::_Head_base.3" = type { i64 }
%"class.std::tuple.4" = type { %"struct.std::_Tuple_impl.5" }
%"struct.std::_Tuple_impl.5" = type { %"struct.std::_Tuple_impl.6", %"struct.std::_Head_base.10" }
%"struct.std::_Tuple_impl.6" = type { %"struct.std::_Tuple_impl.7", %"struct.std::_Head_base.9" }
%"struct.std::_Tuple_impl.7" = type { %"struct.std::_Head_base.8" }
%"struct.std::_Head_base.8" = type { ptr }
%"struct.std::_Head_base.9" = type { ptr }
%"struct.std::_Head_base.10" = type { ptr }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca %class.TreeDiameter, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca %"class.std::tuple", align 8
  %9 = alloca %"class.std::tuple.4", align 8
  %10 = tail call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %11 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %12 = getelementptr i8, ptr %11, i64 -24
  %13 = load i64, ptr %12, align 8
  %14 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %13
  %15 = tail call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %14, ptr noundef null)
  %16 = load ptr, ptr @_ZSt4cout, align 8, !tbaa !5
  %17 = getelementptr i8, ptr %16, i64 -24
  %18 = load i64, ptr %17, align 8
  %19 = getelementptr inbounds i8, ptr @_ZSt4cout, i64 %18
  %20 = tail call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %19, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #7
  %21 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %1)
  call void @llvm.lifetime.start.p0(i64 40, ptr nonnull %2) #7
  %22 = load i32, ptr %1, align 4, !tbaa !8
  %23 = sext i32 %22 to i64
  %24 = call noundef i64 @_ZNSt14numeric_limitsImE3maxEv() #7
  call void @_ZN12TreeDiameterC2Emm(ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %23, i64 noundef %24)
  %25 = load i32, ptr %1, align 4, !tbaa !8
  %26 = icmp sgt i32 %25, 1
  br i1 %26, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %37, %0
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #7
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #7
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %7) #7
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %8) #7
  invoke void @_ZNK12TreeDiameter5solveEm(ptr dead_on_unwind nonnull writable sret(%"class.std::tuple") align 8 %8, ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef 0)
          to label %44 unwind label %52

.lr.ph:                                           ; preds = %0, %37
  %.0610 = phi i32 [ %38, %37 ], [ 0, %0 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #7
  %27 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %3)
          to label %28 unwind label %42

28:                                               ; preds = %.lr.ph
  %29 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %27, ptr noundef nonnull align 4 dereferenceable(4) %4)
          to label %30 unwind label %42

30:                                               ; preds = %28
  %31 = load i32, ptr %3, align 4, !tbaa !8
  %32 = add nsw i32 %31, -1
  store i32 %32, ptr %3, align 4, !tbaa !8
  %33 = load i32, ptr %4, align 4, !tbaa !8
  %34 = add nsw i32 %33, -1
  store i32 %34, ptr %4, align 4, !tbaa !8
  %35 = sext i32 %32 to i64
  %36 = sext i32 %34 to i64
  invoke void @_ZN12TreeDiameter8add_edgeEmmm(ptr noundef nonnull align 8 dereferenceable(40) %2, i64 noundef %35, i64 noundef %36, i64 noundef 1)
          to label %37 unwind label %42

37:                                               ; preds = %30
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #7
  %38 = add nuw nsw i32 %.0610, 1
  %39 = load i32, ptr %1, align 4, !tbaa !8
  %40 = add nsw i32 %39, -1
  %41 = icmp slt i32 %38, %40
  br i1 %41, label %.lr.ph, label %._crit_edge, !llvm.loop !11

42:                                               ; preds = %30, %28, %.lr.ph
  %43 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #7
  br label %57

44:                                               ; preds = %._crit_edge
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %9) #7
  call void @_ZSt3tieIJmmmEESt5tupleIJDpRT_EES3_(ptr dead_on_unwind nonnull writable sret(%"class.std::tuple.4") align 8 %9, ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %7) #7
  %45 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt5tupleIJRmS0_S0_EEaSIJmmmEEENSt9enable_ifIXcl12__assignableIDpT_EEERS1_E4typeEOS_IJS5_EE(ptr noundef nonnull align 8 dereferenceable(24) %9, ptr noundef nonnull align 8 dereferenceable(24) %8) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %9) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %8) #7
  %46 = load i64, ptr %7, align 8, !tbaa !13
  %47 = add i64 %46, 1
  %48 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEm(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %47)
          to label %49 unwind label %54

49:                                               ; preds = %44
  %50 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %48, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
          to label %51 unwind label %54

51:                                               ; preds = %49
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %7) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #7
  call void @_ZN12TreeDiameterD2Ev(ptr noundef nonnull align 8 dereferenceable(40) %2) #7
  call void @llvm.lifetime.end.p0(i64 40, ptr nonnull %2) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #7
  ret i32 0

52:                                               ; preds = %._crit_edge
  %53 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %8) #7
  br label %56

54:                                               ; preds = %49, %44
  %55 = landingpad { ptr, i32 }
          cleanup
  br label %56

56:                                               ; preds = %54, %52
  %.pn = phi { ptr, i32 } [ %55, %54 ], [ %53, %52 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %7) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #7
  br label %57

57:                                               ; preds = %56, %42
  %.pn8 = phi { ptr, i32 } [ %43, %42 ], [ %.pn, %56 ]
  call void @_ZN12TreeDiameterD2Ev(ptr noundef nonnull align 8 dereferenceable(40) %2) #7
  call void @llvm.lifetime.end.p0(i64 40, ptr nonnull %2) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #7
  resume { ptr, i32 } %.pn8
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNSt14numeric_limitsImE3maxEv() local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN12TreeDiameterC2Emm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef, i64 noundef) unnamed_addr #4 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN12TreeDiameter8add_edgeEmmm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef, i64 noundef, i64 noundef) local_unnamed_addr #4 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK12TreeDiameter5solveEm(ptr dead_on_unwind noalias writable sret(%"class.std::tuple") align 8, ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) local_unnamed_addr #4 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZSt3tieIJmmmEESt5tupleIJDpRT_EES3_(ptr dead_on_unwind noalias writable sret(%"class.std::tuple.4") align 8, ptr noundef nonnull align 8 dereferenceable(8), 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 8 dereferenceable(24) ptr @_ZNSt5tupleIJRmS0_S0_EEaSIJmmmEEENSt9enable_ifIXcl12__assignableIDpT_EEERS1_E4typeEOS_IJS5_EE(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEm(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) local_unnamed_addr #4 align 2

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #5

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN12TreeDiameterD2Ev(ptr noundef nonnull align 8 dereferenceable(40)) unnamed_addr #6 align 2

attributes #0 = { mustprogress norecurse 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 = { "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 = { mustprogress nocallback nofree nosync 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 = { inlinehint 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 #6 = { 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 #7 = { 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !10, i64 0}
!10 = !{!"omnipotent char", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!14, !14, i64 0}
!14 = !{!"long", !10, i64 0}


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