; LLVM IR from eyangch/competitive-programming :: Codeforces/1635/e.ll (Z3dfsxx)

; 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<long long, std::allocator<long long>>::_Vector_impl" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

@O = external dso_local global [200000 x i64], align 16
@ori = external dso_local global [200000 x %"class.std::vector"], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z3dfsxx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i1, align 1
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i8, align 1
  %7 = alloca ptr, align 8
  %8 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %9 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %10 = alloca i64, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = getelementptr inbounds [200000 x i64], ptr @O, i64 0, i64 %11
  %13 = load i64, ptr %12, align 8, !tbaa !5
  %14 = icmp sgt i64 %13, 0
  br i1 %14, label %15, label %23

15:                                               ; preds = %2
  %16 = load i64, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds [200000 x i64], ptr @O, i64 0, i64 %16
  %18 = load i64, ptr %17, align 8, !tbaa !5
  %19 = load i64, ptr %5, align 8, !tbaa !5
  %20 = icmp ne i64 %18, %19
  br i1 %20, label %21, label %22

21:                                               ; preds = %15
  store i1 false, ptr %3, align 1
  br label %57

22:                                               ; preds = %15
  store i1 true, ptr %3, align 1
  br label %57

23:                                               ; preds = %2
  %24 = load i64, ptr %5, align 8, !tbaa !5
  %25 = load i64, ptr %4, align 8, !tbaa !5
  %26 = getelementptr inbounds [200000 x i64], ptr @O, i64 0, i64 %25
  store i64 %24, ptr %26, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #4
  store i8 1, ptr %6, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %27 = load i64, ptr %4, align 8, !tbaa !5
  %28 = getelementptr inbounds [200000 x %"class.std::vector"], ptr @ori, i64 0, i64 %27
  store ptr %28, ptr %7, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %29 = load ptr, ptr %7, align 8, !tbaa !11
  %30 = call ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %29) #4
  %31 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %8, i32 0, i32 0
  store ptr %30, ptr %31, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #4
  %32 = load ptr, ptr %7, align 8, !tbaa !11
  %33 = call ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %32) #4
  %34 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %9, i32 0, i32 0
  store ptr %33, ptr %34, align 8
  br label %35

35:                                               ; preds = %52, %23
  %36 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %8, ptr noundef nonnull align 8 dereferenceable(8) %9) #4
  br i1 %36, label %38, label %37

37:                                               ; preds = %35
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  br label %54

38:                                               ; preds = %35
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %39 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %8) #4
  %40 = load i64, ptr %39, align 8, !tbaa !5
  store i64 %40, ptr %10, align 8, !tbaa !5
  %41 = load i64, ptr %10, align 8, !tbaa !5
  %42 = load i64, ptr %5, align 8, !tbaa !5
  %43 = sub nsw i64 3, %42
  %44 = call noundef zeroext i1 @_Z3dfsxx(i64 noundef %41, i64 noundef %43)
  %45 = zext i1 %44 to i32
  %46 = load i8, ptr %6, align 1, !tbaa !9, !range !13, !noundef !14
  %47 = trunc i8 %46 to i1
  %48 = zext i1 %47 to i32
  %49 = and i32 %48, %45
  %50 = icmp ne i32 %49, 0
  %51 = zext i1 %50 to i8
  store i8 %51, ptr %6, align 1, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  br label %52

52:                                               ; preds = %38
  %53 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %8) #4
  br label %35

54:                                               ; preds = %37
  %55 = load i8, ptr %6, align 1, !tbaa !9, !range !13, !noundef !14
  %56 = trunc i8 %55 to i1
  store i1 %56, ptr %3, align 1
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #4
  br label %57

57:                                               ; preds = %54, %22, %21
  %58 = load i1, ptr %3, align 1
  ret i1 %58
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

attributes #0 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { inlinehint mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #4 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"any pointer", !7, i64 0}
!13 = !{i8 0, i8 2}
!14 = !{}


; 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<long long, std::allocator<long long>>::_Vector_impl" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

@O = external dso_local local_unnamed_addr global [200000 x i64], align 16
@ori = external dso_local global [200000 x %"class.std::vector"], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z3dfsxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %4 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %5 = getelementptr inbounds [200000 x i64], ptr @O, i64 0, i64 %0
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %7 = icmp sgt i64 %6, 0
  br i1 %7, label %8, label %9

8:                                                ; preds = %2
  %.not = icmp eq i64 %6, %1
  br label %22

9:                                                ; preds = %2
  store i64 %1, ptr %5, align 8, !tbaa !5
  %10 = getelementptr inbounds [200000 x %"class.std::vector"], ptr @ori, i64 0, i64 %0
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %11 = tail call ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %10) #3
  store ptr %11, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %12 = tail call ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %10) #3
  store ptr %12, ptr %4, align 8
  %13 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  br i1 %13, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %9
  %14 = sub nsw i64 3, %1
  br label %15

._crit_edge:                                      ; preds = %15, %9
  %.012.lcssa = phi i1 [ true, %9 ], [ %19, %15 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  br label %22

15:                                               ; preds = %.lr.ph, %15
  %.01214 = phi i1 [ true, %.lr.ph ], [ %19, %15 ]
  %16 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %17 = load i64, ptr %16, align 8, !tbaa !5
  %18 = call noundef zeroext i1 @_Z3dfsxx(i64 noundef %17, i64 noundef %14)
  %19 = and i1 %.01214, %18
  %20 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %21 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  br i1 %21, label %15, label %._crit_edge

22:                                               ; preds = %8, %._crit_edge
  %.0 = phi i1 [ %.012.lcssa, %._crit_edge ], [ %.not, %8 ]
  ret i1 %.0
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_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) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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