; LLVM IR from ayush-tulsyan/ACM-ICPC-Handbook :: code (LCS)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.std::pair" = type <{ %"struct.std::_Rb_tree_const_iterator", i8, [7 x i8] }>
%"struct.std::_Rb_tree_const_iterator" = type { ptr }
%"class.std::set" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<std::vector<int>, std::vector<int>, std::_Identity<std::vector<int>>, std::less<std::vector<int>>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<std::vector<int>, std::vector<int>, std::_Identity<std::vector<int>>, std::less<std::vector<int>>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z12backtrackallRSt6vectorIS_IiSaIiEESaIS1_EERSt3setIS1_St4lessIS1_ES2_ERS1_SA_ii(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(48) %1, ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(24) %3, i32 noundef %4, i32 noundef %5) #1 personality ptr @__gxx_personality_v0 {
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  %13 = alloca %"class.std::vector", align 8
  %14 = alloca ptr, align 8
  %15 = alloca i32, align 4
  %16 = alloca %"struct.std::pair", align 8
  %17 = alloca %"class.std::set", align 8
  %18 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %19 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %20 = alloca %"class.std::vector", align 8
  %21 = alloca %"struct.std::pair", align 8
  %22 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  store ptr %0, ptr %7, align 8, !tbaa !5
  store ptr %1, ptr %8, align 8, !tbaa !5
  store ptr %2, ptr %9, align 8, !tbaa !5
  store ptr %3, ptr %10, align 8, !tbaa !5
  store i32 %4, ptr %11, align 4, !tbaa !9
  store i32 %5, ptr %12, align 4, !tbaa !9
  %23 = load i32, ptr %11, align 4, !tbaa !9
  %24 = icmp ne i32 %23, 0
  br i1 %24, label %25, label %28

25:                                               ; preds = %6
  %26 = load i32, ptr %12, align 4, !tbaa !9
  %27 = icmp ne i32 %26, 0
  br i1 %27, label %40, label %28

28:                                               ; preds = %25, %6
  %29 = load ptr, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 24, ptr %13) #4
  call void @llvm.memset.p0.i64(ptr align 8 %13, i8 0, i64 24, i1 false)
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %13) #4
  %30 = invoke { ptr, i8 } @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE6insertEOS2_(ptr noundef nonnull align 8 dereferenceable(48) %29, ptr noundef nonnull align 8 dereferenceable(24) %13)
          to label %31 unwind label %36

31:                                               ; preds = %28
  %32 = getelementptr inbounds { ptr, i8 }, ptr %16, i32 0, i32 0
  %33 = extractvalue { ptr, i8 } %30, 0
  store ptr %33, ptr %32, align 8
  %34 = getelementptr inbounds { ptr, i8 }, ptr %16, i32 0, i32 1
  %35 = extractvalue { ptr, i8 } %30, 1
  store i8 %35, ptr %34, align 8
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %13) #4
  call void @llvm.lifetime.end.p0(i64 24, ptr %13) #4
  br label %161

36:                                               ; preds = %28
  %37 = landingpad { ptr, i32 }
          cleanup
  %38 = extractvalue { ptr, i32 } %37, 0
  store ptr %38, ptr %14, align 8
  %39 = extractvalue { ptr, i32 } %37, 1
  store i32 %39, ptr %15, align 4
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %13) #4
  call void @llvm.lifetime.end.p0(i64 24, ptr %13) #4
  br label %162

40:                                               ; preds = %25
  %41 = load ptr, ptr %9, align 8, !tbaa !5
  %42 = load i32, ptr %11, align 4, !tbaa !9
  %43 = sub nsw i32 %42, 1
  %44 = sext i32 %43 to i64
  %45 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %41, i64 noundef %44) #4
  %46 = load i32, ptr %45, align 4, !tbaa !9
  %47 = load ptr, ptr %10, align 8, !tbaa !5
  %48 = load i32, ptr %12, align 4, !tbaa !9
  %49 = sub nsw i32 %48, 1
  %50 = sext i32 %49 to i64
  %51 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %47, i64 noundef %50) #4
  %52 = load i32, ptr %51, align 4, !tbaa !9
  %53 = icmp eq i32 %46, %52
  br i1 %53, label %54, label %104

54:                                               ; preds = %40
  call void @llvm.lifetime.start.p0(i64 48, ptr %17) #4
  call void @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EEC2Ev(ptr noundef nonnull align 8 dereferenceable(48) %17) #4
  %55 = load ptr, ptr %7, align 8, !tbaa !5
  %56 = load ptr, ptr %9, align 8, !tbaa !5
  %57 = load ptr, ptr %10, align 8, !tbaa !5
  %58 = load i32, ptr %11, align 4, !tbaa !9
  %59 = sub nsw i32 %58, 1
  %60 = load i32, ptr %12, align 4, !tbaa !9
  %61 = sub nsw i32 %60, 1
  invoke void @_Z12backtrackallRSt6vectorIS_IiSaIiEESaIS1_EERSt3setIS1_St4lessIS1_ES2_ERS1_SA_ii(ptr noundef nonnull align 8 dereferenceable(24) %55, ptr noundef nonnull align 8 dereferenceable(48) %17, ptr noundef nonnull align 8 dereferenceable(24) %56, ptr noundef nonnull align 8 dereferenceable(24) %57, i32 noundef %59, i32 noundef %61)
          to label %62 unwind label %70

62:                                               ; preds = %54
  call void @llvm.lifetime.start.p0(i64 8, ptr %18) #4
  %63 = call ptr @_ZNKSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %17) #4
  %64 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %18, i32 0, i32 0
  store ptr %63, ptr %64, align 8
  br label %65

65:                                               ; preds = %90, %62
  call void @llvm.lifetime.start.p0(i64 8, ptr %19) #4
  %66 = call ptr @_ZNKSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %17) #4
  %67 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %19, i32 0, i32 0
  store ptr %66, ptr %67, align 8
  %68 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt6vectorIiSaIiEEES5_(ptr noundef nonnull align 8 dereferenceable(8) %18, ptr noundef nonnull align 8 dereferenceable(8) %19) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %19) #4
  br i1 %68, label %74, label %69

69:                                               ; preds = %65
  call void @llvm.lifetime.end.p0(i64 8, ptr %18) #4
  br label %102

70:                                               ; preds = %54
  %71 = landingpad { ptr, i32 }
          cleanup
  %72 = extractvalue { ptr, i32 } %71, 0
  store ptr %72, ptr %14, align 8
  %73 = extractvalue { ptr, i32 } %71, 1
  store i32 %73, ptr %15, align 4
  br label %103

74:                                               ; preds = %65
  call void @llvm.lifetime.start.p0(i64 24, ptr %20) #4
  %75 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt23_Rb_tree_const_iteratorISt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %18) #4
  invoke void @_ZNSt6vectorIiSaIiEEC2ERKS1_(ptr noundef nonnull align 8 dereferenceable(24) %20, ptr noundef nonnull align 8 dereferenceable(24) %75)
          to label %76 unwind label %93

76:                                               ; preds = %74
  %77 = load ptr, ptr %9, align 8, !tbaa !5
  %78 = load i32, ptr %11, align 4, !tbaa !9
  %79 = sub nsw i32 %78, 1
  %80 = sext i32 %79 to i64
  %81 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %77, i64 noundef %80) #4
  invoke void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %20, ptr noundef nonnull align 4 dereferenceable(4) %81)
          to label %82 unwind label %97

82:                                               ; preds = %76
  %83 = load ptr, ptr %8, align 8, !tbaa !5
  %84 = invoke { ptr, i8 } @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE6insertERKS2_(ptr noundef nonnull align 8 dereferenceable(48) %83, ptr noundef nonnull align 8 dereferenceable(24) %20)
          to label %85 unwind label %97

85:                                               ; preds = %82
  %86 = getelementptr inbounds { ptr, i8 }, ptr %21, i32 0, i32 0
  %87 = extractvalue { ptr, i8 } %84, 0
  store ptr %87, ptr %86, align 8
  %88 = getelementptr inbounds { ptr, i8 }, ptr %21, i32 0, i32 1
  %89 = extractvalue { ptr, i8 } %84, 1
  store i8 %89, ptr %88, align 8
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %20) #4
  call void @llvm.lifetime.end.p0(i64 24, ptr %20) #4
  br label %90

90:                                               ; preds = %85
  %91 = call ptr @_ZNSt23_Rb_tree_const_iteratorISt6vectorIiSaIiEEEppEi(ptr noundef nonnull align 8 dereferenceable(8) %18, i32 noundef 0) #4
  %92 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %22, i32 0, i32 0
  store ptr %91, ptr %92, align 8
  br label %65, !llvm.loop !11

93:                                               ; preds = %74
  %94 = landingpad { ptr, i32 }
          cleanup
  %95 = extractvalue { ptr, i32 } %94, 0
  store ptr %95, ptr %14, align 8
  %96 = extractvalue { ptr, i32 } %94, 1
  store i32 %96, ptr %15, align 4
  br label %101

97:                                               ; preds = %82, %76
  %98 = landingpad { ptr, i32 }
          cleanup
  %99 = extractvalue { ptr, i32 } %98, 0
  store ptr %99, ptr %14, align 8
  %100 = extractvalue { ptr, i32 } %98, 1
  store i32 %100, ptr %15, align 4
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %20) #4
  br label %101

101:                                              ; preds = %97, %93
  call void @llvm.lifetime.end.p0(i64 24, ptr %20) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %18) #4
  br label %103

102:                                              ; preds = %69
  call void @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EED2Ev(ptr noundef nonnull align 8 dereferenceable(48) %17) #4
  call void @llvm.lifetime.end.p0(i64 48, ptr %17) #4
  br label %161

103:                                              ; preds = %101, %70
  call void @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EED2Ev(ptr noundef nonnull align 8 dereferenceable(48) %17) #4
  call void @llvm.lifetime.end.p0(i64 48, ptr %17) #4
  br label %162

104:                                              ; preds = %40
  %105 = load ptr, ptr %7, align 8, !tbaa !5
  %106 = load i32, ptr %11, align 4, !tbaa !9
  %107 = sext i32 %106 to i64
  %108 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %105, i64 noundef %107) #4
  %109 = load i32, ptr %12, align 4, !tbaa !9
  %110 = sub nsw i32 %109, 1
  %111 = sext i32 %110 to i64
  %112 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %108, i64 noundef %111) #4
  %113 = load i32, ptr %112, align 4, !tbaa !9
  %114 = load ptr, ptr %7, align 8, !tbaa !5
  %115 = load i32, ptr %11, align 4, !tbaa !9
  %116 = sub nsw i32 %115, 1
  %117 = sext i32 %116 to i64
  %118 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %114, i64 noundef %117) #4
  %119 = load i32, ptr %12, align 4, !tbaa !9
  %120 = sext i32 %119 to i64
  %121 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %118, i64 noundef %120) #4
  %122 = load i32, ptr %121, align 4, !tbaa !9
  %123 = icmp sge i32 %113, %122
  br i1 %123, label %124, label %132

124:                                              ; preds = %104
  %125 = load ptr, ptr %7, align 8, !tbaa !5
  %126 = load ptr, ptr %8, align 8, !tbaa !5
  %127 = load ptr, ptr %9, align 8, !tbaa !5
  %128 = load ptr, ptr %10, align 8, !tbaa !5
  %129 = load i32, ptr %11, align 4, !tbaa !9
  %130 = load i32, ptr %12, align 4, !tbaa !9
  %131 = sub nsw i32 %130, 1
  call void @_Z12backtrackallRSt6vectorIS_IiSaIiEESaIS1_EERSt3setIS1_St4lessIS1_ES2_ERS1_SA_ii(ptr noundef nonnull align 8 dereferenceable(24) %125, ptr noundef nonnull align 8 dereferenceable(48) %126, ptr noundef nonnull align 8 dereferenceable(24) %127, ptr noundef nonnull align 8 dereferenceable(24) %128, i32 noundef %129, i32 noundef %131)
  br label %132

132:                                              ; preds = %124, %104
  %133 = load ptr, ptr %7, align 8, !tbaa !5
  %134 = load i32, ptr %11, align 4, !tbaa !9
  %135 = sext i32 %134 to i64
  %136 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %133, i64 noundef %135) #4
  %137 = load i32, ptr %12, align 4, !tbaa !9
  %138 = sub nsw i32 %137, 1
  %139 = sext i32 %138 to i64
  %140 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %136, i64 noundef %139) #4
  %141 = load i32, ptr %140, align 4, !tbaa !9
  %142 = load ptr, ptr %7, align 8, !tbaa !5
  %143 = load i32, ptr %11, align 4, !tbaa !9
  %144 = sub nsw i32 %143, 1
  %145 = sext i32 %144 to i64
  %146 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %142, i64 noundef %145) #4
  %147 = load i32, ptr %12, align 4, !tbaa !9
  %148 = sext i32 %147 to i64
  %149 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %146, i64 noundef %148) #4
  %150 = load i32, ptr %149, align 4, !tbaa !9
  %151 = icmp sle i32 %141, %150
  br i1 %151, label %152, label %160

152:                                              ; preds = %132
  %153 = load ptr, ptr %7, align 8, !tbaa !5
  %154 = load ptr, ptr %8, align 8, !tbaa !5
  %155 = load ptr, ptr %9, align 8, !tbaa !5
  %156 = load ptr, ptr %10, align 8, !tbaa !5
  %157 = load i32, ptr %11, align 4, !tbaa !9
  %158 = sub nsw i32 %157, 1
  %159 = load i32, ptr %12, align 4, !tbaa !9
  call void @_Z12backtrackallRSt6vectorIS_IiSaIiEESaIS1_EERSt3setIS1_St4lessIS1_ES2_ERS1_SA_ii(ptr noundef nonnull align 8 dereferenceable(24) %153, ptr noundef nonnull align 8 dereferenceable(48) %154, ptr noundef nonnull align 8 dereferenceable(24) %155, ptr noundef nonnull align 8 dereferenceable(24) %156, i32 noundef %158, i32 noundef %159)
  br label %160

160:                                              ; preds = %152, %132
  br label %161

161:                                              ; preds = %160, %102, %31
  ret void

162:                                              ; preds = %103, %36
  %163 = load ptr, ptr %14, align 8
  %164 = load i32, ptr %15, align 4
  %165 = insertvalue { ptr, i32 } poison, ptr %163, 0
  %166 = insertvalue { ptr, i32 } %165, i32 %164, 1
  resume { ptr, i32 } %166
}

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE6insertEOS2_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EEC2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt6vectorIiSaIiEEES5_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt23_Rb_tree_const_iteratorISt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2ERKS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE6insertERKS2_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt23_Rb_tree_const_iteratorISt6vectorIiSaIiEEEppEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EED2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #0 align 2

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


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::set" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<std::vector<int>, std::vector<int>, std::_Identity<std::vector<int>>, std::less<std::vector<int>>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<std::vector<int>, std::vector<int>, std::_Identity<std::vector<int>>, std::less<std::vector<int>>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }
%"struct.std::_Rb_tree_const_iterator" = type { ptr }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z12backtrackallRSt6vectorIS_IiSaIiEESaIS1_EERSt3setIS1_St4lessIS1_ES2_ERS1_SA_ii(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(48) %1, ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(24) %3, i32 noundef %4, i32 noundef %5) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  %7 = alloca %"class.std::vector", align 8
  %8 = alloca %"class.std::set", align 8
  %9 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %10 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %11 = alloca %"class.std::vector", align 8
  %.not64 = icmp eq i32 %5, 0
  %12 = add nsw i32 %5, -1
  %13 = sext i32 %12 to i64
  %14 = sext i32 %5 to i64
  br i1 %.not64, label %.split63, label %tailrecurse.preheader

tailrecurse.preheader:                            ; preds = %6
  %15 = sext i32 %4 to i64
  br label %tailrecurse

tailrecurse:                                      ; preds = %tailrecurse.preheader, %59
  %indvars.iv = phi i64 [ %15, %tailrecurse.preheader ], [ %indvars.iv.next, %59 ]
  %16 = icmp eq i64 %indvars.iv, 0
  br i1 %16, label %.split63, label %21

.split63:                                         ; preds = %tailrecurse, %6
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %7) #4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(24) %7, i8 0, i64 24, i1 false)
  call void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %7) #4
  %17 = invoke { ptr, i8 } @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE6insertEOS2_(ptr noundef nonnull align 8 dereferenceable(48) %1, ptr noundef nonnull align 8 dereferenceable(24) %7)
          to label %18 unwind label %19

18:                                               ; preds = %.split63
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %7) #4
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %7) #4
  br label %.loopexit

19:                                               ; preds = %.split63
  %20 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %7) #4
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %7) #4
  br label %66

21:                                               ; preds = %tailrecurse
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %22 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef %indvars.iv.next) #4
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %13) #4
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = icmp eq i32 %23, %25
  br i1 %26, label %27, label %50

27:                                               ; preds = %21
  %28 = trunc nsw i64 %indvars.iv.next to i32
  call void @llvm.lifetime.start.p0(i64 48, ptr nonnull %8) #4
  call void @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EEC2Ev(ptr noundef nonnull align 8 dereferenceable(48) %8) #4
  invoke void @_Z12backtrackallRSt6vectorIS_IiSaIiEESaIS1_EERSt3setIS1_St4lessIS1_ES2_ERS1_SA_ii(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(48) %8, ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(24) %3, i32 noundef %28, i32 noundef %12)
          to label %29 unwind label %33

29:                                               ; preds = %27
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %9) #4
  %30 = call ptr @_ZNKSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %8) #4
  store ptr %30, ptr %9, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %10) #4
  %31 = call ptr @_ZNKSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %8) #4
  store ptr %31, ptr %10, align 8
  %32 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt6vectorIiSaIiEEES5_(ptr noundef nonnull align 8 dereferenceable(8) %9, ptr noundef nonnull align 8 dereferenceable(8) %10) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %10) #4
  br i1 %32, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %40, %29
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %9) #4
  call void @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EED2Ev(ptr noundef nonnull align 8 dereferenceable(48) %8) #4
  call void @llvm.lifetime.end.p0(i64 48, ptr nonnull %8) #4
  br label %.loopexit

33:                                               ; preds = %27
  %34 = landingpad { ptr, i32 }
          cleanup
  br label %49

.lr.ph:                                           ; preds = %29, %40
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %11) #4
  %35 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt23_Rb_tree_const_iteratorISt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %9) #4
  invoke void @_ZNSt6vectorIiSaIiEEC2ERKS1_(ptr noundef nonnull align 8 dereferenceable(24) %11, ptr noundef nonnull align 8 dereferenceable(24) %35)
          to label %36 unwind label %44

36:                                               ; preds = %.lr.ph
  %37 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef %indvars.iv.next) #4
  invoke void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %11, ptr noundef nonnull align 4 dereferenceable(4) %37)
          to label %38 unwind label %46

38:                                               ; preds = %36
  %39 = invoke { ptr, i8 } @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE6insertERKS2_(ptr noundef nonnull align 8 dereferenceable(48) %1, ptr noundef nonnull align 8 dereferenceable(24) %11)
          to label %40 unwind label %46

40:                                               ; preds = %38
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %11) #4
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %11) #4
  %41 = call ptr @_ZNSt23_Rb_tree_const_iteratorISt6vectorIiSaIiEEEppEi(ptr noundef nonnull align 8 dereferenceable(8) %9, i32 noundef 0) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %10) #4
  %42 = call ptr @_ZNKSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %8) #4
  store ptr %42, ptr %10, align 8
  %43 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt6vectorIiSaIiEEES5_(ptr noundef nonnull align 8 dereferenceable(8) %9, ptr noundef nonnull align 8 dereferenceable(8) %10) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %10) #4
  br i1 %43, label %.lr.ph, label %._crit_edge, !llvm.loop !9

44:                                               ; preds = %.lr.ph
  %45 = landingpad { ptr, i32 }
          cleanup
  br label %48

46:                                               ; preds = %38, %36
  %47 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %11) #4
  br label %48

48:                                               ; preds = %46, %44
  %.pn = phi { ptr, i32 } [ %47, %46 ], [ %45, %44 ]
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %11) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %9) #4
  br label %49

49:                                               ; preds = %48, %33
  %.pn.pn = phi { ptr, i32 } [ %.pn, %48 ], [ %34, %33 ]
  call void @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EED2Ev(ptr noundef nonnull align 8 dereferenceable(48) %8) #4
  call void @llvm.lifetime.end.p0(i64 48, ptr nonnull %8) #4
  br label %66

50:                                               ; preds = %21
  %51 = tail call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv) #4
  %52 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %51, i64 noundef %13) #4
  %53 = load i32, ptr %52, align 4, !tbaa !5
  %54 = tail call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv.next) #4
  %55 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %54, i64 noundef %14) #4
  %56 = load i32, ptr %55, align 4, !tbaa !5
  %.not = icmp slt i32 %53, %56
  br i1 %.not, label %59, label %57

57:                                               ; preds = %50
  %58 = trunc nsw i64 %indvars.iv to i32
  tail call void @_Z12backtrackallRSt6vectorIS_IiSaIiEESaIS1_EERSt3setIS1_St4lessIS1_ES2_ERS1_SA_ii(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(48) %1, ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(24) %3, i32 noundef %58, i32 noundef %12)
  br label %59

59:                                               ; preds = %57, %50
  %60 = tail call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv) #4
  %61 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %60, i64 noundef %13) #4
  %62 = load i32, ptr %61, align 4, !tbaa !5
  %63 = tail call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_IiSaIiEESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv.next) #4
  %64 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %63, i64 noundef %14) #4
  %65 = load i32, ptr %64, align 4, !tbaa !5
  %.not49 = icmp sgt i32 %62, %65
  br i1 %.not49, label %.loopexit, label %tailrecurse

.loopexit:                                        ; preds = %59, %._crit_edge, %18
  ret void

66:                                               ; preds = %49, %19
  %.pn.pn.pn = phi { ptr, i32 } [ %.pn.pn, %49 ], [ %20, %19 ]
  resume { ptr, i32 } %.pn.pn.pn
}

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE6insertEOS2_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EEC2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorISt6vectorIiSaIiEEES5_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNKSt23_Rb_tree_const_iteratorISt6vectorIiSaIiEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEEC2ERKS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EE6insertERKS2_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt23_Rb_tree_const_iteratorISt6vectorIiSaIiEEEppEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt3setISt6vectorIiSaIiEESt4lessIS2_ESaIS2_EED2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #0 align 2

attributes #0 = { 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 #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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { 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"}


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