; LLVM IR from kazunetakahashi/atcoder :: 2019/0622_ABC131 (E)

; 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_ostream" = type { ptr, %"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::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::tuple<int, int>, std::allocator<std::tuple<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::tuple<int, int>, std::allocator<std::tuple<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::tuple<int, int>, std::allocator<std::tuple<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::tuple<int, int>, std::allocator<std::tuple<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%"class.std::tuple.2" = type { %"struct.std::_Tuple_impl.3" }
%"struct.std::_Tuple_impl.3" = type { %"struct.std::_Tuple_impl.4", %"struct.std::_Head_base.6" }
%"struct.std::_Tuple_impl.4" = type { %"struct.std::_Head_base.5" }
%"struct.std::_Head_base.5" = type { ptr }
%"struct.std::_Head_base.6" = type { ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@V = external dso_local global %"class.std::vector", align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #0

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #1 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)) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z2Nov() #1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  %11 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %12 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %13 = alloca ptr, align 8
  %14 = alloca i32, align 4
  %15 = alloca i32, align 4
  %16 = alloca %"class.std::tuple.2", align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #7
  %17 = 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)
  %18 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %17, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = icmp sle i32 0, %19
  br i1 %20, label %21, label %30

21:                                               ; preds = %0
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = load i32, ptr %2, align 4, !tbaa !5
  %24 = sub nsw i32 %23, 2
  %25 = load i32, ptr %2, align 4, !tbaa !5
  %26 = sub nsw i32 %25, 1
  %27 = mul nsw i32 %24, %26
  %28 = sdiv i32 %27, 2
  %29 = icmp sle i32 %22, %28
  br i1 %29, label %31, label %30

30:                                               ; preds = %21, %0
  call void @_Z2Nov()
  br label %31

31:                                               ; preds = %30, %21
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #7
  store i32 1, ptr %4, align 4, !tbaa !5
  br label %32

32:                                               ; preds = %39, %31
  %33 = load i32, ptr %4, align 4, !tbaa !5
  %34 = load i32, ptr %2, align 4, !tbaa !5
  %35 = icmp slt i32 %33, %34
  br i1 %35, label %37, label %36

36:                                               ; preds = %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #7
  br label %42

37:                                               ; preds = %32
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #7
  store i32 0, ptr %5, align 4, !tbaa !5
  %38 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE12emplace_backIJiRiEEERS1_DpOT_(ptr noundef nonnull align 8 dereferenceable(24) @V, ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %4)
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #7
  br label %39

39:                                               ; preds = %37
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = add nsw i32 %40, 1
  store i32 %41, ptr %4, align 4, !tbaa !5
  br label %32, !llvm.loop !9

42:                                               ; preds = %36
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #7
  %43 = load i32, ptr %2, align 4, !tbaa !5
  %44 = sub nsw i32 %43, 2
  %45 = load i32, ptr %2, align 4, !tbaa !5
  %46 = sub nsw i32 %45, 1
  %47 = mul nsw i32 %44, %46
  %48 = sdiv i32 %47, 2
  %49 = load i32, ptr %3, align 4, !tbaa !5
  %50 = sub nsw i32 %48, %49
  %51 = sext i32 %50 to i64
  store i64 %51, ptr %6, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #7
  store i32 1, ptr %7, align 4, !tbaa !5
  br label %52

52:                                               ; preds = %80, %42
  %53 = load i32, ptr %7, align 4, !tbaa !5
  %54 = load i32, ptr %2, align 4, !tbaa !5
  %55 = icmp slt i32 %53, %54
  br i1 %55, label %57, label %56

56:                                               ; preds = %52
  store i32 5, ptr %8, align 4
  br label %83

57:                                               ; preds = %52
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #7
  %58 = load i32, ptr %7, align 4, !tbaa !5
  %59 = add nsw i32 %58, 1
  store i32 %59, ptr %9, align 4, !tbaa !5
  br label %60

60:                                               ; preds = %74, %57
  %61 = load i32, ptr %9, align 4, !tbaa !5
  %62 = load i32, ptr %2, align 4, !tbaa !5
  %63 = icmp slt i32 %61, %62
  br i1 %63, label %65, label %64

64:                                               ; preds = %60
  store i32 8, ptr %8, align 4
  br label %77

65:                                               ; preds = %60
  %66 = load i64, ptr %6, align 8, !tbaa !11
  %67 = icmp sgt i64 %66, 0
  br i1 %67, label %68, label %72

68:                                               ; preds = %65
  %69 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE12emplace_backIJRiS5_EEERS1_DpOT_(ptr noundef nonnull align 8 dereferenceable(24) @V, ptr noundef nonnull align 4 dereferenceable(4) %7, ptr noundef nonnull align 4 dereferenceable(4) %9)
  %70 = load i64, ptr %6, align 8, !tbaa !11
  %71 = add nsw i64 %70, -1
  store i64 %71, ptr %6, align 8, !tbaa !11
  br label %73

72:                                               ; preds = %65
  store i32 11, ptr %8, align 4
  br label %77

73:                                               ; preds = %68
  br label %74

74:                                               ; preds = %73
  %75 = load i32, ptr %9, align 4, !tbaa !5
  %76 = add nsw i32 %75, 1
  store i32 %76, ptr %9, align 4, !tbaa !5
  br label %60, !llvm.loop !13

77:                                               ; preds = %72, %64
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #7
  %78 = load i32, ptr %8, align 4
  switch i32 %78, label %83 [
    i32 8, label %79
  ]

79:                                               ; preds = %77
  br label %80

80:                                               ; preds = %79
  %81 = load i32, ptr %7, align 4, !tbaa !5
  %82 = add nsw i32 %81, 1
  store i32 %82, ptr %7, align 4, !tbaa !5
  br label %52, !llvm.loop !14

83:                                               ; preds = %77, %56
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #7
  %84 = load i32, ptr %8, align 4
  switch i32 %84, label %113 [
    i32 5, label %85
    i32 11, label %86
  ]

85:                                               ; preds = %83
  br label %86

86:                                               ; preds = %85, %83
  %87 = call noundef i64 @_ZNKSt6vectorISt5tupleIJiiEESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @V) #7
  %88 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEm(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %87)
  %89 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %88, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #7
  store ptr @V, ptr %10, align 8, !tbaa !15
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #7
  %90 = call ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) @V) #7
  %91 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %11, i32 0, i32 0
  store ptr %90, ptr %91, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #7
  %92 = call ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) @V) #7
  %93 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %12, i32 0, i32 0
  store ptr %92, ptr %93, align 8
  br label %94

94:                                               ; preds = %109, %86
  %95 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt5tupleIJiiEESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %11, ptr noundef nonnull align 8 dereferenceable(8) %12) #7
  br i1 %95, label %97, label %96

96:                                               ; preds = %94
  store i32 12, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #7
  br label %111

97:                                               ; preds = %94
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #7
  %98 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt5tupleIJiiEESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %11) #7
  store ptr %98, ptr %13, align 8, !tbaa !15
  call void @llvm.lifetime.start.p0(i64 4, ptr %14) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr %15) #7
  %99 = load ptr, ptr %13, align 8, !tbaa !15
  call void @llvm.lifetime.start.p0(i64 16, ptr %16) #7
  call void @_ZSt3tieIJiiEESt5tupleIJDpRT_EES3_(ptr dead_on_unwind writable sret(%"class.std::tuple.2") align 8 %16, ptr noundef nonnull align 4 dereferenceable(4) %14, ptr noundef nonnull align 4 dereferenceable(4) %15) #7
  %100 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt5tupleIJRiS0_EEaSIiiEENSt9enable_ifIXcl12__assignableIRKT_RKT0_EEERS1_E4typeERKS_IJS4_S7_EE(ptr noundef nonnull align 8 dereferenceable(16) %16, ptr noundef nonnull align 4 dereferenceable(8) %99) #7
  call void @llvm.lifetime.end.p0(i64 16, ptr %16) #7
  %101 = load i32, ptr %14, align 4, !tbaa !5
  %102 = add nsw i32 %101, 1
  %103 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %102)
  %104 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %103, ptr noundef @.str.3)
  %105 = load i32, ptr %15, align 4, !tbaa !5
  %106 = add nsw i32 %105, 1
  %107 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %104, i32 noundef %106)
  %108 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %107, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  call void @llvm.lifetime.end.p0(i64 4, ptr %15) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %14) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #7
  br label %109

109:                                              ; preds = %97
  %110 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt5tupleIJiiEESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %11) #7
  br label %94

111:                                              ; preds = %96
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #7
  %112 = load i32, ptr %1, align 4
  ret i32 %112

113:                                              ; preds = %83
  unreachable
}

; 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)) #4

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE12emplace_backIJiRiEEERS1_DpOT_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #1 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 noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE12emplace_backIJRiS5_EEERS1_DpOT_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #1 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEm(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorISt5tupleIJiiEESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #5 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #5 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #5 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPSt5tupleIJiiEESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #6

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt5tupleIJiiEESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #5 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZSt3tieIJiiEESt5tupleIJDpRT_EES3_(ptr dead_on_unwind noalias writable sret(%"class.std::tuple.2") align 8, ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt5tupleIJRiS0_EEaSIiiEENSt9enable_ifIXcl12__assignableIRKT_RKT0_EEERS1_E4typeERKS_IJS4_S7_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(8)) #5 align 2

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt5tupleIJiiEESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #5 align 2

attributes #0 = { 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 #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 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 #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { "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 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !12, i64 0}
!12 = !{!"long long", !7, i64 0}
!13 = distinct !{!13, !10}
!14 = distinct !{!14, !10}
!15 = !{!16, !16, i64 0}
!16 = !{!"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::basic_ostream" = type { ptr, %"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::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::tuple<int, int>, std::allocator<std::tuple<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::tuple<int, int>, std::allocator<std::tuple<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::tuple<int, int>, std::allocator<std::tuple<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::tuple<int, int>, std::allocator<std::tuple<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%"class.std::tuple.2" = type { %"struct.std::_Tuple_impl.3" }
%"struct.std::_Tuple_impl.3" = type { %"struct.std::_Tuple_impl.4", %"struct.std::_Head_base.6" }
%"struct.std::_Tuple_impl.4" = type { %"struct.std::_Head_base.5" }
%"struct.std::_Head_base.5" = type { ptr }
%"struct.std::_Head_base.6" = type { ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@V = external dso_local global %"class.std::vector", align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #0

; 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 #1 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)) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z2Nov() local_unnamed_addr #1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %8 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca %"class.std::tuple.2", align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #7
  %12 = 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)
  %13 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %12, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %14 = load i32, ptr %2, align 4, !tbaa !5
  %15 = icmp sgt i32 %14, -1
  br i1 %15, label %16, label %22

16:                                               ; preds = %0
  %17 = load i32, ptr %1, align 4, !tbaa !5
  %18 = add nsw i32 %17, -2
  %19 = add nsw i32 %17, -1
  %20 = mul nsw i32 %18, %19
  %21 = sdiv i32 %20, 2
  %.not = icmp sgt i32 %14, %21
  br i1 %.not, label %22, label %23

22:                                               ; preds = %16, %0
  call void @_Z2Nov()
  %.pre = load i32, ptr %1, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %22, %16
  %24 = phi i32 [ %.pre, %22 ], [ %17, %16 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #7
  store i32 1, ptr %3, align 4, !tbaa !5
  %25 = icmp sgt i32 %24, 1
  br i1 %25, label %.lr.ph, label %._crit_edge.thread

._crit_edge.thread:                               ; preds = %23
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #7
  br label %.loopexit

._crit_edge:                                      ; preds = %.lr.ph
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #7
  %26 = load i32, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #7
  store i32 1, ptr %5, align 4, !tbaa !5
  %27 = icmp sgt i32 %37, 1
  br i1 %27, label %.lr.ph20.preheader, label %.loopexit

.lr.ph20.preheader:                               ; preds = %._crit_edge
  %28 = add nsw i32 %37, -2
  %29 = add nsw i32 %37, -1
  %30 = mul nsw i32 %28, %29
  %31 = lshr i32 %30, 1
  %32 = sub nsw i32 %31, %26
  %33 = sext i32 %32 to i64
  br label %.lr.ph20

.lr.ph:                                           ; preds = %23, %.lr.ph
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #7
  store i32 0, ptr %4, align 4, !tbaa !5
  %34 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE12emplace_backIJiRiEEERS1_DpOT_(ptr noundef nonnull align 8 dereferenceable(24) @V, ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %3)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #7
  %35 = load i32, ptr %3, align 4, !tbaa !5
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %3, align 4, !tbaa !5
  %37 = load i32, ptr %1, align 4, !tbaa !5
  %38 = icmp slt i32 %36, %37
  br i1 %38, label %.lr.ph, label %._crit_edge, !llvm.loop !9

.lr.ph20:                                         ; preds = %.lr.ph20.preheader, %._crit_edge16
  %39 = phi i32 [ %46, %._crit_edge16 ], [ %37, %.lr.ph20.preheader ]
  %storemerge7.in10 = phi i32 [ %.pre-phi, %._crit_edge16 ], [ 1, %.lr.ph20.preheader ]
  %.018 = phi i64 [ %.1.lcssa, %._crit_edge16 ], [ %33, %.lr.ph20.preheader ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %6) #7
  %storemerge711 = add nsw i32 %storemerge7.in10, 1
  store i32 %storemerge711, ptr %6, align 4, !tbaa !5
  %.not812 = icmp slt i32 %storemerge711, %39
  br i1 %.not812, label %.lr.ph15, label %._crit_edge16

.lr.ph15:                                         ; preds = %.lr.ph20, %41
  %.113 = phi i64 [ %43, %41 ], [ %.018, %.lr.ph20 ]
  %40 = icmp sgt i64 %.113, 0
  br i1 %40, label %41, label %45

41:                                               ; preds = %.lr.ph15
  %42 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE12emplace_backIJRiS5_EEERS1_DpOT_(ptr noundef nonnull align 8 dereferenceable(24) @V, ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %6)
  %43 = add nsw i64 %.113, -1
  %storemerge7.in = load i32, ptr %6, align 4, !tbaa !5
  %storemerge7 = add nsw i32 %storemerge7.in, 1
  store i32 %storemerge7, ptr %6, align 4, !tbaa !5
  %44 = load i32, ptr %1, align 4, !tbaa !5
  %.not8 = icmp slt i32 %storemerge7, %44
  br i1 %.not8, label %.lr.ph15, label %._crit_edge16.loopexit, !llvm.loop !11

45:                                               ; preds = %.lr.ph15
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %6) #7
  br label %.loopexit

._crit_edge16.loopexit:                           ; preds = %41
  %.pre27 = load i32, ptr %5, align 4, !tbaa !5
  %.pre28 = add nsw i32 %.pre27, 1
  br label %._crit_edge16

._crit_edge16:                                    ; preds = %._crit_edge16.loopexit, %.lr.ph20
  %.pre-phi = phi i32 [ %.pre28, %._crit_edge16.loopexit ], [ %storemerge711, %.lr.ph20 ]
  %46 = phi i32 [ %44, %._crit_edge16.loopexit ], [ %39, %.lr.ph20 ]
  %.1.lcssa = phi i64 [ %43, %._crit_edge16.loopexit ], [ %.018, %.lr.ph20 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %6) #7
  store i32 %.pre-phi, ptr %5, align 4, !tbaa !5
  %47 = icmp slt i32 %.pre-phi, %46
  br i1 %47, label %.lr.ph20, label %.loopexit, !llvm.loop !12

.loopexit:                                        ; preds = %._crit_edge16, %._crit_edge.thread, %._crit_edge, %45
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #7
  %48 = call noundef i64 @_ZNKSt6vectorISt5tupleIJiiEESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @V) #7
  %49 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEm(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %48)
  %50 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %49, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %7) #7
  %51 = call ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) @V) #7
  store ptr %51, ptr %7, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %8) #7
  %52 = call ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) @V) #7
  store ptr %52, ptr %8, align 8
  %53 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt5tupleIJiiEESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(8) %8) #7
  br i1 %53, label %.lr.ph22, label %._crit_edge23

._crit_edge23:                                    ; preds = %.lr.ph22, %.loopexit
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %8) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %7) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #7
  ret i32 0

.lr.ph22:                                         ; preds = %.loopexit, %.lr.ph22
  %54 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt5tupleIJiiEESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %9) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %10) #7
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %11) #7
  call void @_ZSt3tieIJiiEESt5tupleIJDpRT_EES3_(ptr dead_on_unwind nonnull writable sret(%"class.std::tuple.2") align 8 %11, ptr noundef nonnull align 4 dereferenceable(4) %9, ptr noundef nonnull align 4 dereferenceable(4) %10) #7
  %55 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt5tupleIJRiS0_EEaSIiiEENSt9enable_ifIXcl12__assignableIRKT_RKT0_EEERS1_E4typeERKS_IJS4_S7_EE(ptr noundef nonnull align 8 dereferenceable(16) %11, ptr noundef nonnull align 4 dereferenceable(8) %54) #7
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %11) #7
  %56 = load i32, ptr %9, align 4, !tbaa !5
  %57 = add nsw i32 %56, 1
  %58 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %57)
  %59 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %58, ptr noundef nonnull @.str.3)
  %60 = load i32, ptr %10, align 4, !tbaa !5
  %61 = add nsw i32 %60, 1
  %62 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %59, i32 noundef %61)
  %63 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %62, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %10) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %9) #7
  %64 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt5tupleIJiiEESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #7
  %65 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt5tupleIJiiEESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(8) %8) #7
  br i1 %65, label %.lr.ph22, label %._crit_edge23
}

; 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 #4

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE12emplace_backIJiRiEEERS1_DpOT_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1 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 noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE12emplace_backIJRiS5_EEERS1_DpOT_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1 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 #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorISt5tupleIJiiEESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #5 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #5 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt5tupleIJiiEESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #5 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPSt5tupleIJiiEESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #6

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt5tupleIJiiEESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #5 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZSt3tieIJiiEESt5tupleIJDpRT_EES3_(ptr dead_on_unwind noalias writable sret(%"class.std::tuple.2") align 8, ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt5tupleIJRiS0_EEaSIiiEENSt9enable_ifIXcl12__assignableIRKT_RKT0_EEERS1_E4typeERKS_IJS4_S7_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #5 align 2

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt5tupleIJiiEESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #5 align 2

attributes #0 = { 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 #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 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 #3 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { "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 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; Effective O3 passes: BDCEPass,CorrelatedValuePropagationPass,DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass