; LLVM IR from eyangch/competitive-programming :: Codeforces/1554/e.ll (Z3dfsxxx)

; 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 }

@G = external dso_local global [100000 x %"class.std::vector"], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z3dfsxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca ptr, align 8
  %10 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %11 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %12 = alloca i32, align 4
  %13 = alloca i64, align 8
  store i64 %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  store i64 0, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #4
  %14 = load i64, ptr %5, align 8, !tbaa !5
  %15 = getelementptr inbounds [100000 x %"class.std::vector"], ptr @G, i64 0, i64 %14
  store ptr %15, ptr %9, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %16 = load ptr, ptr %9, align 8, !tbaa !9
  %17 = call ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %16) #4
  %18 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %10, i32 0, i32 0
  store ptr %17, ptr %18, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #4
  %19 = load ptr, ptr %9, align 8, !tbaa !9
  %20 = call ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %19) #4
  %21 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %11, i32 0, i32 0
  store ptr %20, ptr %21, align 8
  br label %22

22:                                               ; preds = %46, %3
  %23 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %10, ptr noundef nonnull align 8 dereferenceable(8) %11) #4
  br i1 %23, label %25, label %24

24:                                               ; preds = %22
  store i32 2, ptr %12, align 4
  br label %48

25:                                               ; preds = %22
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #4
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %10) #4
  %27 = load i64, ptr %26, align 8, !tbaa !5
  store i64 %27, ptr %13, align 8, !tbaa !5
  %28 = load i64, ptr %13, align 8, !tbaa !5
  %29 = load i64, ptr %6, align 8, !tbaa !5
  %30 = icmp eq i64 %28, %29
  br i1 %30, label %31, label %32

31:                                               ; preds = %25
  store i32 3, ptr %12, align 4
  br label %43

32:                                               ; preds = %25
  %33 = load i64, ptr %13, align 8, !tbaa !5
  %34 = load i64, ptr %5, align 8, !tbaa !5
  %35 = load i64, ptr %7, align 8, !tbaa !5
  %36 = call noundef i64 @_Z3dfsxxx(i64 noundef %33, i64 noundef %34, i64 noundef %35)
  %37 = load i64, ptr %8, align 8, !tbaa !5
  %38 = add nsw i64 %37, %36
  store i64 %38, ptr %8, align 8, !tbaa !5
  %39 = load i64, ptr %8, align 8, !tbaa !5
  %40 = icmp slt i64 %39, 0
  br i1 %40, label %41, label %42

41:                                               ; preds = %32
  store i64 -1000000000, ptr %4, align 8
  store i32 1, ptr %12, align 4
  br label %43

42:                                               ; preds = %32
  store i32 0, ptr %12, align 4
  br label %43

43:                                               ; preds = %42, %41, %31
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #4
  %44 = load i32, ptr %12, align 4
  switch i32 %44, label %48 [
    i32 0, label %45
    i32 3, label %46
  ]

45:                                               ; preds = %43
  br label %46

46:                                               ; preds = %45, %43
  %47 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %10) #4
  br label %22

48:                                               ; preds = %43, %24
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #4
  %49 = load i32, ptr %12, align 4
  switch i32 %49, label %64 [
    i32 2, label %50
  ]

50:                                               ; preds = %48
  %51 = load i64, ptr %8, align 8, !tbaa !5
  %52 = load i64, ptr %7, align 8, !tbaa !5
  %53 = srem i64 %51, %52
  %54 = icmp eq i64 %53, 0
  br i1 %54, label %55, label %56

55:                                               ; preds = %50
  store i64 1, ptr %4, align 8
  store i32 1, ptr %12, align 4
  br label %64

56:                                               ; preds = %50
  %57 = load i64, ptr %8, align 8, !tbaa !5
  %58 = add nsw i64 %57, 1
  %59 = load i64, ptr %7, align 8, !tbaa !5
  %60 = srem i64 %58, %59
  %61 = icmp eq i64 %60, 0
  br i1 %61, label %62, label %63

62:                                               ; preds = %56
  store i64 0, ptr %4, align 8
  store i32 1, ptr %12, align 4
  br label %64

63:                                               ; preds = %56
  store i64 -1000000000, ptr %4, align 8
  store i32 1, ptr %12, align 4
  br label %64

64:                                               ; preds = %63, %62, %55, %48
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  %65 = load i64, ptr %4, align 8
  ret i64 %65
}

; 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 = !{!"any pointer", !7, i64 0}


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

%"class.std::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 }

@G = external dso_local global [100000 x %"class.std::vector"], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z3dfsxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %5 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %6 = getelementptr inbounds [100000 x %"class.std::vector"], ptr @G, i64 0, i64 %0
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %7 = tail call ptr @_ZNSt6vectorIxSaIxEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %6) #3
  store ptr %7, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #3
  %8 = tail call ptr @_ZNSt6vectorIxSaIxEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %6) #3
  store ptr %8, ptr %5, align 8
  %9 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5) #3
  br i1 %9, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3, %17
  %.01831 = phi i64 [ %.119.ph, %17 ], [ 0, %3 ]
  %10 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  %11 = load i64, ptr %10, align 8, !tbaa !5
  %12 = icmp eq i64 %11, %1
  br i1 %12, label %17, label %13

13:                                               ; preds = %.lr.ph
  %14 = call noundef i64 @_Z3dfsxxx(i64 noundef %11, i64 noundef %0, i64 noundef %2)
  %15 = add nsw i64 %14, %.01831
  %16 = icmp slt i64 %15, 0
  br i1 %16, label %.thread28, label %17

.thread28:                                        ; preds = %13
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  br label %26

17:                                               ; preds = %.lr.ph, %13
  %.119.ph = phi i64 [ %15, %13 ], [ %.01831, %.lr.ph ]
  %18 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPxSt6vectorIxSaIxEEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  %19 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPxSt6vectorIxSaIxEEEEbRKNS_17__normal_iteratorIT_T0_EESA_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5) #3
  br i1 %19, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %17, %3
  %.018.lcssa = phi i64 [ 0, %3 ], [ %.119.ph, %17 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  %20 = srem i64 %.018.lcssa, %2
  %21 = icmp eq i64 %20, 0
  br i1 %21, label %26, label %22

22:                                               ; preds = %._crit_edge
  %23 = add nsw i64 %.018.lcssa, 1
  %24 = srem i64 %23, %2
  %25 = icmp eq i64 %24, 0
  %.24 = select i1 %25, i64 0, i64 -1000000000
  br label %26

26:                                               ; preds = %.thread28, %22, %._crit_edge
  %.3 = phi i64 [ 1, %._crit_edge ], [ %.24, %22 ], [ -1000000000, %.thread28 ]
  ret i64 %.3
}

; 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: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass