; LLVM IR from DionysiosB/CodeForces :: 1915F-Greetings (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"

%"struct.std::pair" = type { %"class.std::vector", i64 }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.2" = type { %"struct.std::_Vector_base.3" }
%"struct.std::_Vector_base.3" = type { %"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::allocator.4" = type { i8 }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%"class.std::allocator" = type { i8 }
%"struct.std::pair.7" = type { i64, i64 }

@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [10 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9mergesortSt6vectorIxSaIxEE(ptr dead_on_unwind noalias writable sret(%"struct.std::pair") align 8, ptr noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

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) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSaIxEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEEC2EmRKS0_(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef, ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorIxED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEEC2ERKS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairISt6vectorIxSaIxEExED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #4 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca %"class.std::vector.2", align 8
  %5 = alloca %"class.std::allocator.4", align 1
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  %9 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %10 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %11 = alloca %"class.std::vector", align 8
  %12 = alloca %"class.std::allocator", align 1
  %13 = alloca i64, align 8
  %14 = alloca %"struct.std::pair", align 8
  %15 = alloca %"class.std::vector", align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #7
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %17

17:                                               ; preds = %91, %0
  %18 = load i64, ptr %2, align 8, !tbaa !5
  %19 = add nsw i64 %18, -1
  store i64 %19, ptr %2, align 8, !tbaa !5
  %20 = icmp ne i64 %18, 0
  br i1 %20, label %21, label %109

21:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #7
  %22 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 24, ptr %4) #7
  %23 = load i64, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #7
  call void @_ZNSaISt4pairIxxEEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %5) #7
  invoke void @_ZNSt6vectorISt4pairIxxESaIS1_EEC2EmRKS2_(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %23, ptr noundef nonnull align 1 dereferenceable(1) %5)
          to label %24 unwind label %30

24:                                               ; preds = %21
  call void @_ZNSt15__new_allocatorISt4pairIxxEED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %5) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #7
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #7
  store i64 0, ptr %8, align 8, !tbaa !5
  br label %25

25:                                               ; preds = %43, %24
  %26 = load i64, ptr %8, align 8, !tbaa !5
  %27 = load i64, ptr %3, align 8, !tbaa !5
  %28 = icmp slt i64 %26, %27
  br i1 %28, label %34, label %29

29:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #7
  br label %50

30:                                               ; preds = %21
  %31 = landingpad { ptr, i32 }
          cleanup
  %32 = extractvalue { ptr, i32 } %31, 0
  store ptr %32, ptr %6, align 8
  %33 = extractvalue { ptr, i32 } %31, 1
  store i32 %33, ptr %7, align 4
  call void @_ZNSt15__new_allocatorISt4pairIxxEED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %5) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #7
  br label %108

34:                                               ; preds = %25
  %35 = load i64, ptr %8, align 8, !tbaa !5
  %36 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %35) #7
  %37 = getelementptr inbounds %"struct.std::pair.7", ptr %36, i32 0, i32 0
  %38 = load i64, ptr %8, align 8, !tbaa !5
  %39 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %38) #7
  %40 = getelementptr inbounds %"struct.std::pair.7", ptr %39, i32 0, i32 1
  %41 = invoke i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %37, ptr noundef %40)
          to label %42 unwind label %46

42:                                               ; preds = %34
  br label %43

43:                                               ; preds = %42
  %44 = load i64, ptr %8, align 8, !tbaa !5
  %45 = add nsw i64 %44, 1
  store i64 %45, ptr %8, align 8, !tbaa !5
  br label %25, !llvm.loop !9

46:                                               ; preds = %34
  %47 = landingpad { ptr, i32 }
          cleanup
  %48 = extractvalue { ptr, i32 } %47, 0
  store ptr %48, ptr %6, align 8
  %49 = extractvalue { ptr, i32 } %47, 1
  store i32 %49, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #7
  br label %107

50:                                               ; preds = %29
  %51 = call ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %4) #7
  %52 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %9, i32 0, i32 0
  store ptr %51, ptr %52, align 8
  %53 = call ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %4) #7
  %54 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %10, i32 0, i32 0
  store ptr %53, ptr %54, align 8
  %55 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %9, i32 0, i32 0
  %56 = load ptr, ptr %55, align 8
  %57 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %10, i32 0, i32 0
  %58 = load ptr, ptr %57, align 8
  invoke void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIxxESt6vectorIS3_SaIS3_EEEEEvT_S9_(ptr %56, ptr %58)
          to label %59 unwind label %67

59:                                               ; preds = %50
  call void @llvm.lifetime.start.p0(i64 24, ptr %11) #7
  %60 = load i64, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %12) #7
  call void @_ZNSaIxEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %12) #7
  invoke void @_ZNSt6vectorIxSaIxEEC2EmRKS0_(ptr noundef nonnull align 8 dereferenceable(24) %11, i64 noundef %60, ptr noundef nonnull align 1 dereferenceable(1) %12)
          to label %61 unwind label %71

61:                                               ; preds = %59
  call void @_ZNSt15__new_allocatorIxED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %12) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr %12) #7
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #7
  store i64 0, ptr %13, align 8, !tbaa !5
  br label %62

62:                                               ; preds = %82, %61
  %63 = load i64, ptr %13, align 8, !tbaa !5
  %64 = load i64, ptr %3, align 8, !tbaa !5
  %65 = icmp slt i64 %63, %64
  br i1 %65, label %75, label %66

66:                                               ; preds = %62
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #7
  br label %85

67:                                               ; preds = %50
  %68 = landingpad { ptr, i32 }
          cleanup
  %69 = extractvalue { ptr, i32 } %68, 0
  store ptr %69, ptr %6, align 8
  %70 = extractvalue { ptr, i32 } %68, 1
  store i32 %70, ptr %7, align 4
  br label %107

71:                                               ; preds = %59
  %72 = landingpad { ptr, i32 }
          cleanup
  %73 = extractvalue { ptr, i32 } %72, 0
  store ptr %73, ptr %6, align 8
  %74 = extractvalue { ptr, i32 } %72, 1
  store i32 %74, ptr %7, align 4
  call void @_ZNSt15__new_allocatorIxED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %12) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr %12) #7
  br label %106

75:                                               ; preds = %62
  %76 = load i64, ptr %13, align 8, !tbaa !5
  %77 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %76) #7
  %78 = getelementptr inbounds %"struct.std::pair.7", ptr %77, i32 0, i32 1
  %79 = load i64, ptr %78, align 8, !tbaa !11
  %80 = load i64, ptr %13, align 8, !tbaa !5
  %81 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %11, i64 noundef %80) #7
  store i64 %79, ptr %81, align 8, !tbaa !5
  br label %82

82:                                               ; preds = %75
  %83 = load i64, ptr %13, align 8, !tbaa !5
  %84 = add nsw i64 %83, 1
  store i64 %84, ptr %13, align 8, !tbaa !5
  br label %62, !llvm.loop !13

85:                                               ; preds = %66
  call void @llvm.lifetime.start.p0(i64 32, ptr %14) #7
  invoke void @_ZNSt6vectorIxSaIxEEC2ERKS1_(ptr noundef nonnull align 8 dereferenceable(24) %15, ptr noundef nonnull align 8 dereferenceable(24) %11)
          to label %86 unwind label %92

86:                                               ; preds = %85
  invoke void @_Z9mergesortSt6vectorIxSaIxEE(ptr dead_on_unwind writable sret(%"struct.std::pair") align 8 %14, ptr noundef %15)
          to label %87 unwind label %96

87:                                               ; preds = %86
  %88 = getelementptr inbounds %"struct.std::pair", ptr %14, i32 0, i32 1
  %89 = load i64, ptr %88, align 8, !tbaa !14
  %90 = invoke i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %89)
          to label %91 unwind label %100

91:                                               ; preds = %87
  call void @_ZNSt4pairISt6vectorIxSaIxEExED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %14) #7
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %15) #7
  call void @llvm.lifetime.end.p0(i64 32, ptr %14) #7
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %11) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr %11) #7
  call void @_ZNSt6vectorISt4pairIxxESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr %4) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #7
  br label %17, !llvm.loop !21

92:                                               ; preds = %85
  %93 = landingpad { ptr, i32 }
          cleanup
  %94 = extractvalue { ptr, i32 } %93, 0
  store ptr %94, ptr %6, align 8
  %95 = extractvalue { ptr, i32 } %93, 1
  store i32 %95, ptr %7, align 4
  br label %105

96:                                               ; preds = %86
  %97 = landingpad { ptr, i32 }
          cleanup
  %98 = extractvalue { ptr, i32 } %97, 0
  store ptr %98, ptr %6, align 8
  %99 = extractvalue { ptr, i32 } %97, 1
  store i32 %99, ptr %7, align 4
  br label %104

100:                                              ; preds = %87
  %101 = landingpad { ptr, i32 }
          cleanup
  %102 = extractvalue { ptr, i32 } %101, 0
  store ptr %102, ptr %6, align 8
  %103 = extractvalue { ptr, i32 } %101, 1
  store i32 %103, ptr %7, align 4
  call void @_ZNSt4pairISt6vectorIxSaIxEExED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %14) #7
  br label %104

104:                                              ; preds = %100, %96
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %15) #7
  br label %105

105:                                              ; preds = %104, %92
  call void @llvm.lifetime.end.p0(i64 32, ptr %14) #7
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %11) #7
  br label %106

106:                                              ; preds = %105, %71
  call void @llvm.lifetime.end.p0(i64 24, ptr %11) #7
  br label %107

107:                                              ; preds = %106, %67, %46
  call void @_ZNSt6vectorISt4pairIxxESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #7
  br label %108

108:                                              ; preds = %107, %30
  call void @llvm.lifetime.end.p0(i64 24, ptr %4) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #7
  br label %111

109:                                              ; preds = %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #7
  %110 = load i32, ptr %1, align 4
  ret i32 %110

111:                                              ; preds = %108
  %112 = load ptr, ptr %6, align 8
  %113 = load i32, ptr %7, align 4
  %114 = insertvalue { ptr, i32 } poison, ptr %112, 0
  %115 = insertvalue { ptr, i32 } %114, i32 %113, 1
  resume { ptr, i32 } %115
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSaISt4pairIxxEEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIxxESaIS1_EEC2EmRKS2_(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef, ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIxxESt6vectorIS3_SaIS3_EEEEEvT_S9_(ptr, ptr) #6

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

declare i32 @printf(ptr noundef, ...) #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorISt4pairIxxESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorISt4pairIxxEED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #4 = { 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 #5 = { "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 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !6, i64 8}
!12 = !{!"_ZTSSt4pairIxxE", !6, i64 0, !6, i64 8}
!13 = distinct !{!13, !10}
!14 = !{!15, !6, i64 24}
!15 = !{!"_ZTSSt4pairISt6vectorIxSaIxEExE", !16, i64 0, !6, i64 24}
!16 = !{!"_ZTSSt6vectorIxSaIxEE", !17, i64 0}
!17 = !{!"_ZTSSt12_Vector_baseIxSaIxEE", !18, i64 0}
!18 = !{!"_ZTSNSt12_Vector_baseIxSaIxEE12_Vector_implE", !19, i64 0}
!19 = !{!"_ZTSNSt12_Vector_baseIxSaIxEE17_Vector_impl_dataE", !20, i64 0, !20, i64 8, !20, i64 16}
!20 = !{!"any pointer", !7, i64 0}
!21 = distinct !{!21, !10}


; 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"

%"struct.std::pair" = type { %"class.std::vector", i64 }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.2" = type { %"struct.std::_Vector_base.3" }
%"struct.std::_Vector_base.3" = type { %"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<long long, long long>, std::allocator<std::pair<long long, long long>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::allocator.4" = type { i8 }
%"class.std::allocator" = type { i8 }

@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [10 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9mergesortSt6vectorIxSaIxEE(ptr dead_on_unwind noalias writable sret(%"struct.std::pair") align 8, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

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) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSaIxEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEEC2EmRKS0_(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef, ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorIxED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEEC2ERKS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairISt6vectorIxSaIxEExED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #4 personality ptr @__gxx_personality_v0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  %3 = alloca %"class.std::vector.2", align 8
  %4 = alloca %"class.std::allocator.4", align 1
  %5 = alloca %"class.std::vector", align 8
  %6 = alloca %"class.std::allocator", align 1
  %7 = alloca %"struct.std::pair", align 8
  %8 = alloca %"class.std::vector", align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #7
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %10 = load i64, ptr %1, align 8, !tbaa !5
  %11 = add nsw i64 %10, -1
  store i64 %11, ptr %1, align 8, !tbaa !5
  %.not26 = icmp eq i64 %10, 0
  br i1 %.not26, label %._crit_edge29, label %.lr.ph28

.lr.ph28:                                         ; preds = %0
  %12 = getelementptr inbounds i8, ptr %7, i64 24
  br label %13

13:                                               ; preds = %.lr.ph28, %47
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #7
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %3) #7
  %15 = load i64, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %4) #7
  call void @_ZNSaISt4pairIxxEEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %4) #7
  invoke void @_ZNSt6vectorISt4pairIxxESaIS1_EEC2EmRKS2_(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %15, ptr noundef nonnull align 1 dereferenceable(1) %4)
          to label %16 unwind label %21

16:                                               ; preds = %13
  call void @_ZNSt15__new_allocatorISt4pairIxxEED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %4) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %4) #7
  %17 = load i64, ptr %2, align 8, !tbaa !5
  %18 = icmp sgt i64 %17, 0
  br i1 %18, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %16
  %19 = call ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %3) #7
  %20 = call ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %3) #7
  invoke void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIxxESt6vectorIS3_SaIS3_EEEEEvT_S9_(ptr %19, ptr %20)
          to label %30 unwind label %35

21:                                               ; preds = %13
  %22 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt15__new_allocatorISt4pairIxxEED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %4) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %4) #7
  br label %59

.lr.ph:                                           ; preds = %16, %.lr.ph
  %.01621 = phi i64 [ %27, %.lr.ph ], [ 0, %16 ]
  %23 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %.01621) #7
  %24 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %.01621) #7
  %25 = getelementptr inbounds i8, ptr %24, i64 8
  %26 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %23, ptr noundef nonnull %25)
  %27 = add nuw nsw i64 %.01621, 1
  %28 = load i64, ptr %2, align 8, !tbaa !5
  %29 = icmp slt i64 %27, %28
  br i1 %29, label %.lr.ph, label %._crit_edge, !llvm.loop !9

30:                                               ; preds = %._crit_edge
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %5) #7
  %31 = load i64, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %6) #7
  call void @_ZNSaIxEC2Ev(ptr noundef nonnull align 1 dereferenceable(1) %6) #7
  invoke void @_ZNSt6vectorIxSaIxEEC2EmRKS0_(ptr noundef nonnull align 8 dereferenceable(24) %5, i64 noundef %31, ptr noundef nonnull align 1 dereferenceable(1) %6)
          to label %32 unwind label %37

32:                                               ; preds = %30
  call void @_ZNSt15__new_allocatorIxED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %6) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %6) #7
  %33 = load i64, ptr %2, align 8, !tbaa !5
  %34 = icmp sgt i64 %33, 0
  br i1 %34, label %.lr.ph24, label %._crit_edge25

._crit_edge25:                                    ; preds = %.lr.ph24, %32
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %7) #7
  invoke void @_ZNSt6vectorIxSaIxEEC2ERKS1_(ptr noundef nonnull align 8 dereferenceable(24) %8, ptr noundef nonnull align 8 dereferenceable(24) %5)
          to label %46 unwind label %52

35:                                               ; preds = %._crit_edge
  %36 = landingpad { ptr, i32 }
          cleanup
  br label %58

37:                                               ; preds = %30
  %38 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt15__new_allocatorIxED2Ev(ptr noundef nonnull align 1 dereferenceable(1) %6) #7
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %6) #7
  br label %57

.lr.ph24:                                         ; preds = %32, %.lr.ph24
  %.022 = phi i64 [ %43, %.lr.ph24 ], [ 0, %32 ]
  %39 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %.022) #7
  %40 = getelementptr inbounds i8, ptr %39, i64 8
  %41 = load i64, ptr %40, align 8, !tbaa !11
  %42 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %5, i64 noundef %.022) #7
  store i64 %41, ptr %42, align 8, !tbaa !5
  %43 = add nuw nsw i64 %.022, 1
  %44 = load i64, ptr %2, align 8, !tbaa !5
  %45 = icmp slt i64 %43, %44
  br i1 %45, label %.lr.ph24, label %._crit_edge25, !llvm.loop !13

46:                                               ; preds = %._crit_edge25
  invoke void @_Z9mergesortSt6vectorIxSaIxEE(ptr dead_on_unwind nonnull writable sret(%"struct.std::pair") align 8 %7, ptr noundef nonnull %8)
          to label %47 unwind label %54

47:                                               ; preds = %46
  %48 = load i64, ptr %12, align 8, !tbaa !14
  %49 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %48)
  call void @_ZNSt4pairISt6vectorIxSaIxEExED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %7) #7
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %8) #7
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %7) #7
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %5) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %5) #7
  call void @_ZNSt6vectorISt4pairIxxESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %3) #7
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %3) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #7
  %50 = load i64, ptr %1, align 8, !tbaa !5
  %51 = add nsw i64 %50, -1
  store i64 %51, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %50, 0
  br i1 %.not, label %._crit_edge29, label %13, !llvm.loop !21

52:                                               ; preds = %._crit_edge25
  %53 = landingpad { ptr, i32 }
          cleanup
  br label %56

54:                                               ; preds = %46
  %55 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %8) #7
  br label %56

56:                                               ; preds = %54, %52
  %.pn = phi { ptr, i32 } [ %55, %54 ], [ %53, %52 ]
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %7) #7
  call void @_ZNSt6vectorIxSaIxEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %5) #7
  br label %57

57:                                               ; preds = %56, %37
  %.pn.pn = phi { ptr, i32 } [ %.pn, %56 ], [ %38, %37 ]
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %5) #7
  br label %58

58:                                               ; preds = %57, %35
  %.pn.pn.pn = phi { ptr, i32 } [ %.pn.pn, %57 ], [ %36, %35 ]
  call void @_ZNSt6vectorISt4pairIxxESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %3) #7
  br label %59

59:                                               ; preds = %58, %21
  %.pn.pn.pn.pn = phi { ptr, i32 } [ %.pn.pn.pn, %58 ], [ %22, %21 ]
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %3) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #7
  resume { ptr, i32 } %.pn.pn.pn.pn

._crit_edge29:                                    ; preds = %47, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #7
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSaISt4pairIxxEEC2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIxxESaIS1_EEC2EmRKS2_(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef, ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIxxESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIxxESt6vectorIS3_SaIS3_EEEEEvT_S9_(ptr, ptr) local_unnamed_addr #6

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIxxESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorISt4pairIxxESaIS1_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt15__new_allocatorISt4pairIxxEED2Ev(ptr noundef nonnull align 1 dereferenceable(1)) unnamed_addr #2 align 2

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #4 = { 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 #5 = { nofree 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 #6 = { 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 #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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !6, i64 8}
!12 = !{!"_ZTSSt4pairIxxE", !6, i64 0, !6, i64 8}
!13 = distinct !{!13, !10}
!14 = !{!15, !6, i64 24}
!15 = !{!"_ZTSSt4pairISt6vectorIxSaIxEExE", !16, i64 0, !6, i64 24}
!16 = !{!"_ZTSSt6vectorIxSaIxEE", !17, i64 0}
!17 = !{!"_ZTSSt12_Vector_baseIxSaIxEE", !18, i64 0}
!18 = !{!"_ZTSNSt12_Vector_baseIxSaIxEE12_Vector_implE", !19, i64 0}
!19 = !{!"_ZTSNSt12_Vector_baseIxSaIxEE17_Vector_impl_dataE", !20, i64 0, !20, i64 8, !20, i64 16}
!20 = !{!"any pointer", !7, i64 0}
!21 = distinct !{!21, !10}


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