; LLVM IR from bqi343/cp-notebook :: Contests/USACO Training/Ch 5/5.5 picture (main)

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

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<std::pair<int, int>, std::pair<int, int>>, std::allocator<std::pair<std::pair<int, int>, std::pair<int, int>>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<std::pair<int, int>, std::pair<int, int>>, std::allocator<std::pair<std::pair<int, int>, std::pair<int, int>>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<std::pair<int, int>, std::pair<int, int>>, std::allocator<std::pair<std::pair<int, int>, std::pair<int, int>>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<std::pair<int, int>, std::pair<int, int>>, std::allocator<std::pair<std::pair<int, int>, std::pair<int, int>>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::basic_ifstream" = type { %"class.std::basic_istream.base", %"class.std::basic_filebuf", %"class.std::basic_ios" }
%"class.std::basic_istream.base" = type { ptr, i64 }
%"class.std::basic_filebuf" = type { %"class.std::basic_streambuf", %union.pthread_mutex_t, %"class.std::__basic_file", i32, %struct.__mbstate_t, %struct.__mbstate_t, %struct.__mbstate_t, ptr, i64, i8, i8, i8, i8, ptr, ptr, i8, ptr, ptr, i64, ptr, ptr }
%"class.std::basic_streambuf" = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, %"class.std::locale" }
%"class.std::locale" = type { ptr }
%union.pthread_mutex_t = type { %struct.__pthread_mutex_s }
%struct.__pthread_mutex_s = type { i32, i32, i32, i32, i32, i16, i16, %struct.__pthread_internal_list }
%struct.__pthread_internal_list = type { ptr, ptr }
%"class.std::__basic_file" = type <{ ptr, i8, [7 x i8] }>
%struct.__mbstate_t = type { i32, %union.anon }
%union.anon = type { i32 }
%"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::basic_ofstream" = type { %"class.std::basic_ostream.base", %"class.std::basic_filebuf", %"class.std::basic_ios" }
%"class.std::basic_ostream.base" = type { ptr }
%"struct.std::pair" = type { %"struct.std::pair.8", %"struct.std::pair.8" }
%"struct.std::pair.8" = type { i32, i32 }

@N = external dso_local global i32, align 4
@ans = external dso_local global i32, align 4
@rect = external dso_local global %"class.std::vector", align 8
@.str = external hidden unnamed_addr constant [11 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z5solvev() #0

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

declare i32 @__gxx_personality_v0(...)

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

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #2 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca %"class.std::basic_ifstream", align 8
  %3 = alloca %"class.std::basic_ofstream", align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 520, ptr %2) #7
  call void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEEC1EPKcSt13_Ios_Openmode(ptr noundef nonnull align 8 dereferenceable(256) %2, ptr noundef @.str, i32 noundef 8)
  call void @llvm.lifetime.start.p0(i64 512, ptr %3) #7
  invoke void @_ZNSt14basic_ofstreamIcSt11char_traitsIcEEC1EPKcSt13_Ios_Openmode(ptr noundef nonnull align 8 dereferenceable(248) %3, ptr noundef @.str.2, i32 noundef 16)
          to label %8 unwind label %19

8:                                                ; preds = %0
  %9 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %2, ptr noundef nonnull align 4 dereferenceable(4) @N)
          to label %10 unwind label %23

10:                                               ; preds = %8
  %11 = load i32, ptr @N, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  invoke void @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %12)
          to label %13 unwind label %23

13:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #7
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %56, %13
  %15 = load i32, ptr %6, align 4, !tbaa !5
  %16 = load i32, ptr @N, align 4, !tbaa !5
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %27, label %18

18:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #7
  br label %63

19:                                               ; preds = %0
  %20 = landingpad { ptr, i32 }
          cleanup
  %21 = extractvalue { ptr, i32 } %20, 0
  store ptr %21, ptr %4, align 8
  %22 = extractvalue { ptr, i32 } %20, 1
  store i32 %22, ptr %5, align 4
  br label %91

23:                                               ; preds = %86, %83, %82, %63, %10, %8
  %24 = landingpad { ptr, i32 }
          cleanup
  %25 = extractvalue { ptr, i32 } %24, 0
  store ptr %25, ptr %4, align 8
  %26 = extractvalue { ptr, i32 } %24, 1
  store i32 %26, ptr %5, align 4
  br label %90

27:                                               ; preds = %14
  %28 = load i32, ptr %6, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %29) #7
  %31 = getelementptr inbounds %"struct.std::pair", ptr %30, i32 0, i32 0
  %32 = getelementptr inbounds %"struct.std::pair.8", ptr %31, i32 0, i32 0
  %33 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %2, ptr noundef nonnull align 4 dereferenceable(4) %32)
          to label %34 unwind label %59

34:                                               ; preds = %27
  %35 = load i32, ptr %6, align 4, !tbaa !5
  %36 = sext i32 %35 to i64
  %37 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %36) #7
  %38 = getelementptr inbounds %"struct.std::pair", ptr %37, i32 0, i32 1
  %39 = getelementptr inbounds %"struct.std::pair.8", ptr %38, i32 0, i32 0
  %40 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %33, ptr noundef nonnull align 4 dereferenceable(4) %39)
          to label %41 unwind label %59

41:                                               ; preds = %34
  %42 = load i32, ptr %6, align 4, !tbaa !5
  %43 = sext i32 %42 to i64
  %44 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %43) #7
  %45 = getelementptr inbounds %"struct.std::pair", ptr %44, i32 0, i32 0
  %46 = getelementptr inbounds %"struct.std::pair.8", ptr %45, i32 0, i32 1
  %47 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %40, ptr noundef nonnull align 4 dereferenceable(4) %46)
          to label %48 unwind label %59

48:                                               ; preds = %41
  %49 = load i32, ptr %6, align 4, !tbaa !5
  %50 = sext i32 %49 to i64
  %51 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %50) #7
  %52 = getelementptr inbounds %"struct.std::pair", ptr %51, i32 0, i32 1
  %53 = getelementptr inbounds %"struct.std::pair.8", ptr %52, i32 0, i32 1
  %54 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %47, ptr noundef nonnull align 4 dereferenceable(4) %53)
          to label %55 unwind label %59

55:                                               ; preds = %48
  br label %56

56:                                               ; preds = %55
  %57 = load i32, ptr %6, align 4, !tbaa !5
  %58 = add nsw i32 %57, 1
  store i32 %58, ptr %6, align 4, !tbaa !5
  br label %14, !llvm.loop !9

59:                                               ; preds = %48, %41, %34, %27
  %60 = landingpad { ptr, i32 }
          cleanup
  %61 = extractvalue { ptr, i32 } %60, 0
  store ptr %61, ptr %4, align 8
  %62 = extractvalue { ptr, i32 } %60, 1
  store i32 %62, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #7
  br label %90

63:                                               ; preds = %18
  invoke void @_Z5solvev()
          to label %64 unwind label %23

64:                                               ; preds = %63
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #7
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %65

65:                                               ; preds = %79, %64
  %66 = load i32, ptr %7, align 4, !tbaa !5
  %67 = load i32, ptr @N, align 4, !tbaa !5
  %68 = icmp slt i32 %66, %67
  br i1 %68, label %70, label %69

69:                                               ; preds = %65
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #7
  br label %82

70:                                               ; preds = %65
  %71 = load i32, ptr %7, align 4, !tbaa !5
  %72 = sext i32 %71 to i64
  %73 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %72) #7
  %74 = getelementptr inbounds %"struct.std::pair", ptr %73, i32 0, i32 0
  %75 = load i32, ptr %7, align 4, !tbaa !5
  %76 = sext i32 %75 to i64
  %77 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %76) #7
  %78 = getelementptr inbounds %"struct.std::pair", ptr %77, i32 0, i32 1
  call void @_ZSt4swapIiiENSt9enable_ifIXsr6__and_ISt14__is_swappableIT_ES1_IT0_EEE5valueEvE4typeERSt4pairIS2_S4_ESA_(ptr noundef nonnull align 4 dereferenceable(8) %74, ptr noundef nonnull align 4 dereferenceable(8) %78) #7
  br label %79

79:                                               ; preds = %70
  %80 = load i32, ptr %7, align 4, !tbaa !5
  %81 = add nsw i32 %80, 1
  store i32 %81, ptr %7, align 4, !tbaa !5
  br label %65, !llvm.loop !11

82:                                               ; preds = %69
  invoke void @_Z5solvev()
          to label %83 unwind label %23

83:                                               ; preds = %82
  %84 = load i32, ptr @ans, align 4, !tbaa !5
  %85 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %3, i32 noundef %84)
          to label %86 unwind label %23

86:                                               ; preds = %83
  %87 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %85, ptr noundef @.str.3)
          to label %88 unwind label %23

88:                                               ; preds = %86
  call void @_ZNSt14basic_ofstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(248) %3) #7
  call void @llvm.lifetime.end.p0(i64 512, ptr %3) #7
  call void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(256) %2) #7
  call void @llvm.lifetime.end.p0(i64 520, ptr %2) #7
  %89 = load i32, ptr %1, align 4
  ret i32 %89

90:                                               ; preds = %59, %23
  call void @_ZNSt14basic_ofstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(248) %3) #7
  br label %91

91:                                               ; preds = %90, %19
  call void @llvm.lifetime.end.p0(i64 512, ptr %3) #7
  call void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(256) %2) #7
  call void @llvm.lifetime.end.p0(i64 520, ptr %2) #7
  br label %92

92:                                               ; preds = %91
  %93 = load ptr, ptr %4, align 8
  %94 = load i32, ptr %5, align 4
  %95 = insertvalue { ptr, i32 } poison, ptr %93, 0
  %96 = insertvalue { ptr, i32 } %95, i32 %94, 1
  resume { ptr, i32 } %96
}

; Function Attrs: mustprogress uwtable
declare void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEEC1EPKcSt13_Ios_Openmode(ptr noundef nonnull align 8 dereferenceable(256), ptr noundef, i32 noundef) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare void @_ZNSt14basic_ofstreamIcSt11char_traitsIcEEC1EPKcSt13_Ios_Openmode(ptr noundef nonnull align 8 dereferenceable(248), ptr noundef, i32 noundef) unnamed_addr #0 align 2

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #3

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #4 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIiiENSt9enable_ifIXsr6__and_ISt14__is_swappableIT_ES1_IT0_EEE5valueEvE4typeERSt4pairIS2_S4_ESA_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(8)) #5

; 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

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #3

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt14basic_ofstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(248)) unnamed_addr #4 align 2

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(256)) unnamed_addr #4 align 2

attributes #0 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress 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 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #4 = { mustprogress 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 #5 = { 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 #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 = !{!"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}


; 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<std::pair<std::pair<int, int>, std::pair<int, int>>, std::allocator<std::pair<std::pair<int, int>, std::pair<int, int>>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<std::pair<int, int>, std::pair<int, int>>, std::allocator<std::pair<std::pair<int, int>, std::pair<int, int>>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<std::pair<int, int>, std::pair<int, int>>, std::allocator<std::pair<std::pair<int, int>, std::pair<int, int>>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<std::pair<int, int>, std::pair<int, int>>, std::allocator<std::pair<std::pair<int, int>, std::pair<int, int>>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::basic_ifstream" = type { %"class.std::basic_istream.base", %"class.std::basic_filebuf", %"class.std::basic_ios" }
%"class.std::basic_istream.base" = type { ptr, i64 }
%"class.std::basic_filebuf" = type { %"class.std::basic_streambuf", %union.pthread_mutex_t, %"class.std::__basic_file", i32, %struct.__mbstate_t, %struct.__mbstate_t, %struct.__mbstate_t, ptr, i64, i8, i8, i8, i8, ptr, ptr, i8, ptr, ptr, i64, ptr, ptr }
%"class.std::basic_streambuf" = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, %"class.std::locale" }
%"class.std::locale" = type { ptr }
%union.pthread_mutex_t = type { %struct.__pthread_mutex_s }
%struct.__pthread_mutex_s = type { i32, i32, i32, i32, i32, i16, i16, %struct.__pthread_internal_list }
%struct.__pthread_internal_list = type { ptr, ptr }
%"class.std::__basic_file" = type <{ ptr, i8, [7 x i8] }>
%struct.__mbstate_t = type { i32, %union.anon }
%union.anon = type { i32 }
%"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::basic_ofstream" = type { %"class.std::basic_ostream.base", %"class.std::basic_filebuf", %"class.std::basic_ios" }
%"class.std::basic_ostream.base" = type { ptr }

@N = external dso_local global i32, align 4
@ans = external dso_local local_unnamed_addr global i32, align 4
@rect = external dso_local global %"class.std::vector", align 8
@.str = external hidden unnamed_addr constant [11 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z5solvev() local_unnamed_addr #0

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

declare i32 @__gxx_personality_v0(...)

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

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 personality ptr @__gxx_personality_v0 {
  %1 = alloca %"class.std::basic_ifstream", align 8
  %2 = alloca %"class.std::basic_ofstream", align 8
  call void @llvm.lifetime.start.p0(i64 520, ptr nonnull %1) #7
  call void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEEC1EPKcSt13_Ios_Openmode(ptr noundef nonnull align 8 dereferenceable(256) %1, ptr noundef nonnull @.str, i32 noundef 8)
  call void @llvm.lifetime.start.p0(i64 512, ptr nonnull %2) #7
  invoke void @_ZNSt14basic_ofstreamIcSt11char_traitsIcEEC1EPKcSt13_Ios_Openmode(ptr noundef nonnull align 8 dereferenceable(248) %2, ptr noundef nonnull @.str.2, i32 noundef 16)
          to label %3 unwind label %12

3:                                                ; preds = %0
  %4 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %1, ptr noundef nonnull align 4 dereferenceable(4) @N)
          to label %5 unwind label %14

5:                                                ; preds = %3
  %6 = load i32, ptr @N, align 4, !tbaa !5
  %7 = sext i32 %6 to i64
  invoke void @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %7)
          to label %.preheader18 unwind label %14

.preheader18:                                     ; preds = %5
  %8 = load i32, ptr @N, align 4, !tbaa !5
  %9 = icmp sgt i32 %8, 0
  br i1 %9, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %30, %.preheader18
  invoke void @_Z5solvev()
          to label %.preheader unwind label %14

.preheader:                                       ; preds = %._crit_edge
  %10 = load i32, ptr @N, align 4, !tbaa !5
  %11 = icmp sgt i32 %10, 0
  br i1 %11, label %.lr.ph21, label %._crit_edge22

12:                                               ; preds = %0
  %13 = landingpad { ptr, i32 }
          cleanup
  br label %49

14:                                               ; preds = %45, %42, %._crit_edge22, %._crit_edge, %5, %3
  %15 = landingpad { ptr, i32 }
          cleanup
  br label %48

.lr.ph:                                           ; preds = %.preheader18, %30
  %indvars.iv = phi i64 [ %indvars.iv.next, %30 ], [ 0, %.preheader18 ]
  %16 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %indvars.iv) #7
  %17 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %1, ptr noundef nonnull align 4 dereferenceable(4) %16)
          to label %18 unwind label %34

18:                                               ; preds = %.lr.ph
  %19 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %indvars.iv) #7
  %20 = getelementptr inbounds i8, ptr %19, i64 8
  %21 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %17, ptr noundef nonnull align 4 dereferenceable(4) %20)
          to label %22 unwind label %34

22:                                               ; preds = %18
  %23 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %indvars.iv) #7
  %24 = getelementptr inbounds i8, ptr %23, i64 4
  %25 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %21, ptr noundef nonnull align 4 dereferenceable(4) %24)
          to label %26 unwind label %34

26:                                               ; preds = %22
  %27 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %indvars.iv) #7
  %28 = getelementptr inbounds i8, ptr %27, i64 12
  %29 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %25, ptr noundef nonnull align 4 dereferenceable(4) %28)
          to label %30 unwind label %34

30:                                               ; preds = %26
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %31 = load i32, ptr @N, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = icmp slt i64 %indvars.iv.next, %32
  br i1 %33, label %.lr.ph, label %._crit_edge, !llvm.loop !9

34:                                               ; preds = %26, %22, %18, %.lr.ph
  %35 = landingpad { ptr, i32 }
          cleanup
  br label %48

._crit_edge22:                                    ; preds = %.lr.ph21, %.preheader
  invoke void @_Z5solvev()
          to label %42 unwind label %14

.lr.ph21:                                         ; preds = %.preheader, %.lr.ph21
  %indvars.iv24 = phi i64 [ %indvars.iv.next25, %.lr.ph21 ], [ 0, %.preheader ]
  %36 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %indvars.iv24) #7
  %37 = call noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) @rect, i64 noundef %indvars.iv24) #7
  %38 = getelementptr inbounds i8, ptr %37, i64 8
  call void @_ZSt4swapIiiENSt9enable_ifIXsr6__and_ISt14__is_swappableIT_ES1_IT0_EEE5valueEvE4typeERSt4pairIS2_S4_ESA_(ptr noundef nonnull align 4 dereferenceable(8) %36, ptr noundef nonnull align 4 dereferenceable(8) %38) #7
  %indvars.iv.next25 = add nuw nsw i64 %indvars.iv24, 1
  %39 = load i32, ptr @N, align 4, !tbaa !5
  %40 = sext i32 %39 to i64
  %41 = icmp slt i64 %indvars.iv.next25, %40
  br i1 %41, label %.lr.ph21, label %._crit_edge22, !llvm.loop !11

42:                                               ; preds = %._crit_edge22
  %43 = load i32, ptr @ans, align 4, !tbaa !5
  %44 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %2, i32 noundef %43)
          to label %45 unwind label %14

45:                                               ; preds = %42
  %46 = invoke noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %44, ptr noundef nonnull @.str.3)
          to label %47 unwind label %14

47:                                               ; preds = %45
  call void @_ZNSt14basic_ofstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(248) %2) #7
  call void @llvm.lifetime.end.p0(i64 512, ptr nonnull %2) #7
  call void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(256) %1) #7
  call void @llvm.lifetime.end.p0(i64 520, ptr nonnull %1) #7
  ret i32 0

48:                                               ; preds = %34, %14
  %.pn = phi { ptr, i32 } [ %35, %34 ], [ %15, %14 ]
  call void @_ZNSt14basic_ofstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(248) %2) #7
  br label %49

49:                                               ; preds = %48, %12
  %.pn.pn = phi { ptr, i32 } [ %.pn, %48 ], [ %13, %12 ]
  call void @llvm.lifetime.end.p0(i64 512, ptr nonnull %2) #7
  call void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(256) %1) #7
  call void @llvm.lifetime.end.p0(i64 520, ptr nonnull %1) #7
  resume { ptr, i32 } %.pn.pn
}

; Function Attrs: mustprogress uwtable
declare void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEEC1EPKcSt13_Ios_Openmode(ptr noundef nonnull align 8 dereferenceable(256), ptr noundef, i32 noundef) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare void @_ZNSt14basic_ofstreamIcSt11char_traitsIcEEC1EPKcSt13_Ios_Openmode(ptr noundef nonnull align 8 dereferenceable(248), ptr noundef, i32 noundef) unnamed_addr #0 align 2

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 #3

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(16) ptr @_ZNSt6vectorISt4pairIS0_IiiES1_ESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #4 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIiiENSt9enable_ifIXsr6__and_ISt14__is_swappableIT_ES1_IT0_EEE5valueEvE4typeERSt4pairIS2_S4_ESA_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #5

; 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

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt14basic_ofstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(248)) unnamed_addr #4 align 2

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(256)) unnamed_addr #4 align 2

attributes #0 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress 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 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #4 = { mustprogress 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 #5 = { 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 #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 = !{!"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}


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