; LLVM IR from VastoLorde95/Competitive-Programming :: Timus/1905/A.ll (Z3dfsii)

; 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.3" = type { %"struct.std::_Vector_base.4" }
%"struct.std::_Vector_base.4" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%"struct.std::pair" = type { i32, i32 }

@g = external dso_local global [200100 x %"class.std::vector.3"], align 16
@rid = external dso_local global [200100 x i32], align 16
@tstamp = external dso_local global i32, align 4
@vis = external dso_local global [200100 x i32], align 16
@used = external dso_local global [200100 x i32], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z3dfsii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i1, align 1
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %8 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %9 = alloca i32, align 4
  %10 = alloca %"struct.std::pair", align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = icmp eq i32 %13, %14
  br i1 %15, label %16, label %17

16:                                               ; preds = %2
  store i1 true, ptr %3, align 1
  br label %74

17:                                               ; preds = %2
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [200100 x i32], ptr @vis, i64 0, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !5
  %22 = icmp ne i32 %21, 0
  br i1 %22, label %23, label %24

23:                                               ; preds = %17
  store i1 false, ptr %3, align 1
  br label %74

24:                                               ; preds = %17
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [200100 x i32], ptr @vis, i64 0, i64 %26
  store i32 1, ptr %27, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %28 = load i32, ptr %4, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [200100 x %"class.std::vector.3"], ptr @g, i64 0, i64 %29
  store ptr %30, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #5
  %31 = load ptr, ptr %6, align 8, !tbaa !9
  %32 = call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %31) #5
  %33 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %7, i32 0, i32 0
  store ptr %32, ptr %33, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  %34 = load ptr, ptr %6, align 8, !tbaa !9
  %35 = call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %34) #5
  %36 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %8, i32 0, i32 0
  store ptr %35, ptr %36, align 8
  br label %37

37:                                               ; preds = %69, %24
  %38 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(8) %8) #5
  br i1 %38, label %40, label %39

39:                                               ; preds = %37
  store i32 2, ptr %9, align 4
  br label %71

40:                                               ; preds = %37
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #5
  %41 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #5
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %10, ptr align 4 %41, i64 8, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #5
  %42 = getelementptr inbounds %"struct.std::pair", ptr %10, i32 0, i32 0
  %43 = load i32, ptr %42, align 4, !tbaa !11
  store i32 %43, ptr %11, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #5
  %44 = getelementptr inbounds %"struct.std::pair", ptr %10, i32 0, i32 1
  %45 = load i32, ptr %44, align 4, !tbaa !13
  store i32 %45, ptr %12, align 4, !tbaa !5
  %46 = load i32, ptr %11, align 4, !tbaa !5
  %47 = load i32, ptr %5, align 4, !tbaa !5
  %48 = call noundef zeroext i1 @_Z3dfsii(i32 noundef %46, i32 noundef %47)
  br i1 %48, label %49, label %62

49:                                               ; preds = %40
  %50 = load i32, ptr %12, align 4, !tbaa !5
  %51 = icmp ne i32 %50, 0
  br i1 %51, label %52, label %61

52:                                               ; preds = %49
  %53 = load i32, ptr @tstamp, align 4, !tbaa !5
  %54 = add nsw i32 %53, 1
  store i32 %54, ptr @tstamp, align 4, !tbaa !5
  %55 = load i32, ptr %4, align 4, !tbaa !5
  %56 = sext i32 %55 to i64
  %57 = getelementptr inbounds [200100 x i32], ptr @rid, i64 0, i64 %56
  %58 = load i32, ptr %57, align 4, !tbaa !5
  %59 = sext i32 %58 to i64
  %60 = getelementptr inbounds [200100 x i32], ptr @used, i64 0, i64 %59
  store i32 %54, ptr %60, align 4, !tbaa !5
  br label %61

61:                                               ; preds = %52, %49
  store i1 true, ptr %3, align 1
  store i32 1, ptr %9, align 4
  br label %63

62:                                               ; preds = %40
  store i32 0, ptr %9, align 4
  br label %63

63:                                               ; preds = %62, %61
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #5
  %64 = load i32, ptr %9, align 4
  switch i32 %64, label %66 [
    i32 0, label %65
  ]

65:                                               ; preds = %63
  store i32 0, ptr %9, align 4
  br label %66

66:                                               ; preds = %65, %63
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #5
  %67 = load i32, ptr %9, align 4
  switch i32 %67, label %71 [
    i32 0, label %68
  ]

68:                                               ; preds = %66
  br label %69

69:                                               ; preds = %68
  %70 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #5
  br label %37

71:                                               ; preds = %66, %39
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  %72 = load i32, ptr %9, align 4
  switch i32 %72, label %76 [
    i32 2, label %73
    i32 1, label %74
  ]

73:                                               ; preds = %71
  store i1 false, ptr %3, align 1
  br label %74

74:                                               ; preds = %73, %71, %23, %16
  %75 = load i1, ptr %3, align 1
  ret i1 %75

76:                                               ; preds = %71
  unreachable
}

; 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 @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(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 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #4

; 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_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEv(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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #5 = { 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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTSSt4pairIiiE", !6, i64 0, !6, i64 4}
!13 = !{!12, !6, i64 4}


; 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.3" = type { %"struct.std::_Vector_base.4" }
%"struct.std::_Vector_base.4" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

@g = external dso_local global [200100 x %"class.std::vector.3"], align 16
@rid = external dso_local local_unnamed_addr global [200100 x i32], align 16
@tstamp = external dso_local local_unnamed_addr global i32, align 4
@vis = external dso_local local_unnamed_addr global [200100 x i32], align 16
@used = external dso_local local_unnamed_addr global [200100 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z3dfsii(i32 noundef %0, i32 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 = icmp eq i32 %0, %1
  br i1 %5, label %28, label %6

6:                                                ; preds = %2
  %7 = sext i32 %0 to i64
  %8 = getelementptr inbounds [200100 x i32], ptr @vis, i64 0, i64 %7
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %.not = icmp eq i32 %9, 0
  br i1 %.not, label %10, label %28

10:                                               ; preds = %6
  store i32 1, ptr %8, align 4, !tbaa !5
  %11 = getelementptr inbounds [200100 x %"class.std::vector.3"], ptr @g, i64 0, i64 %7
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %12 = tail call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %11) #3
  store ptr %12, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %13 = tail call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %11) #3
  store ptr %13, ptr %4, align 8
  %14 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  br i1 %14, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %10, %.critedge
  %15 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %.sroa.0.0.copyload = load i32, ptr %15, align 4
  %.sroa.4.0..sroa_idx = getelementptr inbounds i8, ptr %15, i64 4
  %.sroa.4.0.copyload = load i32, ptr %.sroa.4.0..sroa_idx, align 4
  %16 = call noundef zeroext i1 @_Z3dfsii(i32 noundef %.sroa.0.0.copyload, i32 noundef %1)
  br i1 %16, label %17, label %.critedge

17:                                               ; preds = %.lr.ph
  %.not19 = icmp eq i32 %.sroa.4.0.copyload, 0
  br i1 %.not19, label %.loopexit, label %18

18:                                               ; preds = %17
  %19 = load i32, ptr @tstamp, align 4, !tbaa !5
  %20 = add nsw i32 %19, 1
  store i32 %20, ptr @tstamp, align 4, !tbaa !5
  %21 = getelementptr inbounds [200100 x i32], ptr @rid, i64 0, i64 %7
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [200100 x i32], ptr @used, i64 0, i64 %23
  store i32 %20, ptr %24, align 4, !tbaa !5
  br label %.loopexit

.critedge:                                        ; preds = %.lr.ph
  %25 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %26 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4) #3
  br i1 %26, label %.lr.ph, label %.loopexit

.loopexit:                                        ; preds = %.critedge, %10, %18, %17
  %27 = phi i1 [ true, %18 ], [ true, %17 ], [ false, %10 ], [ false, %.critedge ]
  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 %28

28:                                               ; preds = %.loopexit, %6, %2
  %.3 = phi i1 [ true, %2 ], [ false, %6 ], [ %27, %.loopexit ]
  ret i1 %.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 @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(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_cxxneIPSt4pairIiiESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(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 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEdeEv(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_iteratorIPSt4pairIiiESt6vectorIS2_SaIS2_EEEppEv(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 = !{!"int", !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,SROAPass,SimplifyCFGPass,TailCallElimPass