; LLVM IR from plskz/competitive-programming :: Junior Training Sheet/A (151)

; 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.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; 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 i32, align 4
  %4 = alloca %"class.std::__cxx11::basic_string", align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %13 = call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %14 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %15 = getelementptr i8, ptr %14, i64 -24
  %16 = load i64, ptr %15, align 8
  %17 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %16
  %18 = call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %17, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #7
  %19 = 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)
  %20 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %19, ptr noundef nonnull align 4 dereferenceable(4) %3)
  call void @llvm.lifetime.start.p0(i64 32, ptr %4) #7
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #7
  %21 = load i32, ptr %2, align 4, !tbaa !8
  %22 = zext i32 %21 to i64
  %23 = call ptr @llvm.stacksave.p0()
  store ptr %23, ptr %5, align 8
  %24 = alloca %"class.std::__cxx11::basic_string", i64 %22, align 16
  store i64 %22, ptr %6, align 8
  %25 = icmp eq i64 %22, 0
  br i1 %25, label %32, label %26

26:                                               ; preds = %0
  %27 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %24, i64 %22
  br label %28

28:                                               ; preds = %28, %26
  %29 = phi ptr [ %24, %26 ], [ %30, %28 ]
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %29) #7
  %30 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %29, i64 1
  %31 = icmp eq ptr %30, %27
  br i1 %31, label %32, label %28

32:                                               ; preds = %28, %0
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #7
  store i32 0, ptr %7, align 4, !tbaa !8
  br label %33

33:                                               ; preds = %44, %32
  %34 = load i32, ptr %7, align 4, !tbaa !8
  %35 = load i32, ptr %2, align 4, !tbaa !8
  %36 = icmp slt i32 %34, %35
  br i1 %36, label %38, label %37

37:                                               ; preds = %33
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #7
  br label %51

38:                                               ; preds = %33
  %39 = load i32, ptr %7, align 4, !tbaa !8
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %24, i64 %40
  %42 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(32) %41)
          to label %43 unwind label %47

43:                                               ; preds = %38
  br label %44

44:                                               ; preds = %43
  %45 = load i32, ptr %7, align 4, !tbaa !8
  %46 = add nsw i32 %45, 1
  store i32 %46, ptr %7, align 4, !tbaa !8
  br label %33, !llvm.loop !11

47:                                               ; preds = %38
  %48 = landingpad { ptr, i32 }
          cleanup
  %49 = extractvalue { ptr, i32 } %48, 0
  store ptr %49, ptr %8, align 8
  %50 = extractvalue { ptr, i32 } %48, 1
  store i32 %50, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #7
  br label %149

51:                                               ; preds = %37
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #7
  store i32 0, ptr %10, align 4, !tbaa !8
  br label %52

52:                                               ; preds = %126, %51
  %53 = load i32, ptr %10, align 4, !tbaa !8
  %54 = load i32, ptr %2, align 4, !tbaa !8
  %55 = icmp slt i32 %53, %54
  br i1 %55, label %57, label %56

56:                                               ; preds = %52
  store i32 5, ptr %11, align 4
  br label %129

57:                                               ; preds = %52
  %58 = load i32, ptr %10, align 4, !tbaa !8
  %59 = sext i32 %58 to i64
  %60 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %24, i64 %59
  %61 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_(ptr noundef nonnull align 8 dereferenceable(32) %4, ptr noundef nonnull align 8 dereferenceable(32) %60)
          to label %62 unwind label %84

62:                                               ; preds = %57
  %63 = load i32, ptr %10, align 4, !tbaa !8
  %64 = icmp ne i32 %63, 0
  br i1 %64, label %65, label %88

65:                                               ; preds = %62
  %66 = load i32, ptr %10, align 4, !tbaa !8
  %67 = sub nsw i32 %66, 1
  %68 = sext i32 %67 to i64
  %69 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %24, i64 %68
  %70 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %69, i64 noundef 0)
          to label %71 unwind label %84

71:                                               ; preds = %65
  %72 = load i8, ptr %70, align 1, !tbaa !13
  %73 = sext i8 %72 to i32
  %74 = load i32, ptr %10, align 4, !tbaa !8
  %75 = sext i32 %74 to i64
  %76 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %4, i64 noundef %75)
          to label %77 unwind label %84

77:                                               ; preds = %71
  %78 = load i8, ptr %76, align 1, !tbaa !13
  %79 = sext i8 %78 to i32
  %80 = icmp eq i32 %73, %79
  br i1 %80, label %81, label %88

81:                                               ; preds = %77
  %82 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str)
          to label %83 unwind label %84

83:                                               ; preds = %81
  store i32 0, ptr %1, align 4
  store i32 1, ptr %11, align 4
  br label %129

84:                                               ; preds = %81, %71, %65, %57
  %85 = landingpad { ptr, i32 }
          cleanup
  %86 = extractvalue { ptr, i32 } %85, 0
  store ptr %86, ptr %8, align 8
  %87 = extractvalue { ptr, i32 } %85, 1
  store i32 %87, ptr %9, align 4
  br label %131

88:                                               ; preds = %77, %62
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #7
  store i32 0, ptr %12, align 4, !tbaa !8
  br label %89

89:                                               ; preds = %120, %88
  %90 = load i32, ptr %12, align 4, !tbaa !8
  %91 = load i32, ptr %3, align 4, !tbaa !8
  %92 = icmp slt i32 %90, %91
  br i1 %92, label %94, label %93

93:                                               ; preds = %89
  store i32 8, ptr %11, align 4
  br label %123

94:                                               ; preds = %89
  %95 = load i32, ptr %10, align 4, !tbaa !8
  %96 = sext i32 %95 to i64
  %97 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %24, i64 %96
  %98 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %97, i64 noundef 0)
          to label %99 unwind label %115

99:                                               ; preds = %94
  %100 = load i8, ptr %98, align 1, !tbaa !13
  %101 = sext i8 %100 to i32
  %102 = load i32, ptr %10, align 4, !tbaa !8
  %103 = sext i32 %102 to i64
  %104 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %24, i64 %103
  %105 = load i32, ptr %12, align 4, !tbaa !8
  %106 = sext i32 %105 to i64
  %107 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %104, i64 noundef %106)
          to label %108 unwind label %115

108:                                              ; preds = %99
  %109 = load i8, ptr %107, align 1, !tbaa !13
  %110 = sext i8 %109 to i32
  %111 = icmp ne i32 %101, %110
  br i1 %111, label %112, label %119

112:                                              ; preds = %108
  %113 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str)
          to label %114 unwind label %115

114:                                              ; preds = %112
  store i32 0, ptr %1, align 4
  store i32 1, ptr %11, align 4
  br label %123

115:                                              ; preds = %112, %99, %94
  %116 = landingpad { ptr, i32 }
          cleanup
  %117 = extractvalue { ptr, i32 } %116, 0
  store ptr %117, ptr %8, align 8
  %118 = extractvalue { ptr, i32 } %116, 1
  store i32 %118, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #7
  br label %131

119:                                              ; preds = %108
  br label %120

120:                                              ; preds = %119
  %121 = load i32, ptr %12, align 4, !tbaa !8
  %122 = add nsw i32 %121, 1
  store i32 %122, ptr %12, align 4, !tbaa !8
  br label %89, !llvm.loop !14

123:                                              ; preds = %114, %93
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #7
  %124 = load i32, ptr %11, align 4
  switch i32 %124, label %129 [
    i32 8, label %125
  ]

125:                                              ; preds = %123
  br label %126

126:                                              ; preds = %125
  %127 = load i32, ptr %10, align 4, !tbaa !8
  %128 = add nsw i32 %127, 1
  store i32 %128, ptr %10, align 4, !tbaa !8
  br label %52, !llvm.loop !15

129:                                              ; preds = %123, %83, %56
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #7
  %130 = load i32, ptr %11, align 4
  switch i32 %130, label %139 [
    i32 5, label %132
  ]

131:                                              ; preds = %115, %84
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #7
  br label %149

132:                                              ; preds = %129
  %133 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.1)
          to label %134 unwind label %135

134:                                              ; preds = %132
  store i32 0, ptr %1, align 4
  store i32 1, ptr %11, align 4
  br label %139

135:                                              ; preds = %132
  %136 = landingpad { ptr, i32 }
          cleanup
  %137 = extractvalue { ptr, i32 } %136, 0
  store ptr %137, ptr %8, align 8
  %138 = extractvalue { ptr, i32 } %136, 1
  store i32 %138, ptr %9, align 4
  br label %149

139:                                              ; preds = %134, %129
  %140 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %24, i64 %22
  %141 = icmp eq ptr %24, %140
  br i1 %141, label %146, label %142

142:                                              ; preds = %142, %139
  %143 = phi ptr [ %140, %139 ], [ %144, %142 ]
  %144 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %143, i64 -1
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %144) #7
  %145 = icmp eq ptr %144, %24
  br i1 %145, label %146, label %142

146:                                              ; preds = %142, %139
  %147 = load ptr, ptr %5, align 8
  call void @llvm.stackrestore.p0(ptr %147)
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #7
  call void @llvm.lifetime.end.p0(i64 32, ptr %4) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #7
  %148 = load i32, ptr %1, align 4
  ret i32 %148

149:                                              ; preds = %135, %131, %47
  %150 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %24, i64 %22
  %151 = icmp eq ptr %24, %150
  br i1 %151, label %156, label %152

152:                                              ; preds = %152, %149
  %153 = phi ptr [ %150, %149 ], [ %154, %152 ]
  %154 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %153, i64 -1
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %154) #7
  %155 = icmp eq ptr %154, %24
  br i1 %155, label %156, label %152

156:                                              ; preds = %152, %149
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #7
  call void @llvm.lifetime.end.p0(i64 32, ptr %4) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #7
  br label %157

157:                                              ; preds = %156
  %158 = load ptr, ptr %8, align 8
  %159 = load i32, ptr %9, align 4
  %160 = insertvalue { ptr, i32 } poison, ptr %158, 0
  %161 = insertvalue { ptr, i32 } %160, i32 %159, 1
  resume { ptr, i32 } %161
}

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 void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #4

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(32)) #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) #3

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) #5 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) #2 align 2

; 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) #6

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #4

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 = { nocallback nofree nosync nounwind willreturn }
attributes #5 = { 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 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 = !{!10, !10, i64 0}
!14 = distinct !{!14, !12}
!15 = distinct !{!15, !12}


; 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.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; 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 i32, align 4
  %3 = alloca %"class.std::__cxx11::basic_string", align 8
  %4 = tail call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %5 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %6 = getelementptr i8, ptr %5, i64 -24
  %7 = load i64, ptr %6, align 8
  %8 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %7
  %9 = tail call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %8, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #7
  %10 = 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)
  %11 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %10, ptr noundef nonnull align 4 dereferenceable(4) %2)
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %3) #7
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #7
  %12 = load i32, ptr %1, align 4, !tbaa !8
  %13 = zext i32 %12 to i64
  %14 = call ptr @llvm.stacksave.p0()
  %15 = alloca %"class.std::__cxx11::basic_string", i64 %13, align 16
  %16 = icmp eq i32 %12, 0
  br i1 %16, label %.loopexit44, label %17

17:                                               ; preds = %0
  %18 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %15, i64 %13
  br label %19

19:                                               ; preds = %19, %17
  %20 = phi ptr [ %15, %17 ], [ %21, %19 ]
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %20) #7
  %21 = getelementptr inbounds i8, ptr %20, i64 32
  %22 = icmp eq ptr %21, %18
  br i1 %22, label %.loopexit44, label %19

.loopexit44:                                      ; preds = %19, %0
  %23 = load i32, ptr %1, align 4, !tbaa !8
  %24 = icmp sgt i32 %23, 0
  br i1 %24, label %.lr.ph, label %.critedge39

.preheader42:                                     ; preds = %28
  %25 = icmp sgt i32 %29, 0
  br i1 %25, label %.lr.ph51, label %.critedge39

.lr.ph:                                           ; preds = %.loopexit44, %28
  %indvars.iv = phi i64 [ %indvars.iv.next, %28 ], [ 0, %.loopexit44 ]
  %26 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %15, i64 %indvars.iv
  %27 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(32) %26)
          to label %28 unwind label %32

28:                                               ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %29 = load i32, ptr %1, align 4, !tbaa !8
  %30 = sext i32 %29 to i64
  %31 = icmp slt i64 %indvars.iv.next, %30
  br i1 %31, label %.lr.ph, label %.preheader42, !llvm.loop !11

32:                                               ; preds = %.lr.ph
  %33 = landingpad { ptr, i32 }
          cleanup
  br label %69

.lr.ph51:                                         ; preds = %.preheader42, %.critedge
  %indvars.iv56 = phi i64 [ %indvars.iv.next57, %.critedge ], [ 0, %.preheader42 ]
  %34 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %15, i64 %indvars.iv56
  %35 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_(ptr noundef nonnull align 8 dereferenceable(32) %3, ptr noundef nonnull align 8 dereferenceable(32) %34)
          to label %36 unwind label %.loopexit43

36:                                               ; preds = %.lr.ph51
  %.not = icmp eq i64 %indvars.iv56, 0
  br i1 %.not, label %46, label %37

37:                                               ; preds = %36
  %38 = getelementptr i8, ptr %34, i64 -32
  %39 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %38, i64 noundef 0)
  %40 = load i8, ptr %39, align 1, !tbaa !13
  %41 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %3, i64 noundef %indvars.iv56)
  %42 = load i8, ptr %41, align 1, !tbaa !13
  %43 = icmp eq i8 %40, %42
  br i1 %43, label %44, label %46

44:                                               ; preds = %37
  %45 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str)
          to label %64 unwind label %.loopexit.split-lp

.loopexit43:                                      ; preds = %.lr.ph51
  %lpad.loopexit = landingpad { ptr, i32 }
          cleanup
  br label %69

.loopexit.split-lp:                               ; preds = %44
  %lpad.loopexit.split-lp = landingpad { ptr, i32 }
          cleanup
  br label %69

46:                                               ; preds = %37, %36
  %47 = load i32, ptr %2, align 4, !tbaa !8
  %.not3346 = icmp sgt i32 %47, 0
  br i1 %.not3346, label %.lr.ph48, label %.critedge

48:                                               ; preds = %.lr.ph48
  %indvars.iv.next54 = add nuw nsw i64 %indvars.iv53, 1
  %49 = load i32, ptr %2, align 4, !tbaa !8
  %50 = sext i32 %49 to i64
  %.not33 = icmp slt i64 %indvars.iv.next54, %50
  br i1 %.not33, label %.lr.ph48, label %.critedge, !llvm.loop !14

.lr.ph48:                                         ; preds = %46, %48
  %indvars.iv53 = phi i64 [ %indvars.iv.next54, %48 ], [ 0, %46 ]
  %51 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %34, i64 noundef 0)
  %52 = load i8, ptr %51, align 1, !tbaa !13
  %53 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %34, i64 noundef %indvars.iv53)
  %54 = load i8, ptr %53, align 1, !tbaa !13
  %.not32 = icmp eq i8 %52, %54
  br i1 %.not32, label %48, label %55

55:                                               ; preds = %.lr.ph48
  %56 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str)
          to label %64 unwind label %57

57:                                               ; preds = %55
  %58 = landingpad { ptr, i32 }
          cleanup
  br label %69

.critedge:                                        ; preds = %48, %46
  %indvars.iv.next57 = add nuw nsw i64 %indvars.iv56, 1
  %59 = load i32, ptr %1, align 4, !tbaa !8
  %60 = sext i32 %59 to i64
  %.not35 = icmp slt i64 %indvars.iv.next57, %60
  br i1 %.not35, label %.lr.ph51, label %.critedge39, !llvm.loop !15

.critedge39:                                      ; preds = %.critedge, %.loopexit44, %.preheader42
  %61 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str.1)
          to label %64 unwind label %62

62:                                               ; preds = %.critedge39
  %63 = landingpad { ptr, i32 }
          cleanup
  br label %69

64:                                               ; preds = %44, %55, %.critedge39
  br i1 %16, label %.loopexit41, label %.preheader40.preheader

.preheader40.preheader:                           ; preds = %64
  %65 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %15, i64 %13
  br label %.preheader40

.preheader40:                                     ; preds = %.preheader40.preheader, %.preheader40
  %66 = phi ptr [ %67, %.preheader40 ], [ %65, %.preheader40.preheader ]
  %67 = getelementptr inbounds i8, ptr %66, i64 -32
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %67) #7
  %68 = icmp eq ptr %67, %15
  br i1 %68, label %.loopexit41, label %.preheader40

.loopexit41:                                      ; preds = %.preheader40, %64
  call void @llvm.stackrestore.p0(ptr %14)
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #7
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #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

69:                                               ; preds = %.loopexit43, %.loopexit.split-lp, %57, %62, %32
  %.pn36 = phi { ptr, i32 } [ %33, %32 ], [ %63, %62 ], [ %58, %57 ], [ %lpad.loopexit, %.loopexit43 ], [ %lpad.loopexit.split-lp, %.loopexit.split-lp ]
  br i1 %16, label %.loopexit, label %.preheader.preheader

.preheader.preheader:                             ; preds = %69
  %70 = getelementptr inbounds %"class.std::__cxx11::basic_string", ptr %15, i64 %13
  br label %.preheader

.preheader:                                       ; preds = %.preheader.preheader, %.preheader
  %71 = phi ptr [ %72, %.preheader ], [ %70, %.preheader.preheader ]
  %72 = getelementptr inbounds i8, ptr %71, i64 -32
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %72) #7
  %73 = icmp eq ptr %72, %15
  br i1 %73, label %.loopexit, label %.preheader

.loopexit:                                        ; preds = %.preheader, %69
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #7
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #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
  resume { ptr, i32 } %.pn36
}

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 void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #4

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #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) #3

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #5 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) local_unnamed_addr #2 align 2

; 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 #6

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #4

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 nocallback nofree nosync nounwind willreturn }
attributes #5 = { 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 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 = !{!10, !10, i64 0}
!14 = distinct !{!14, !12}
!15 = distinct !{!15, !12}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass