; LLVM IR from ShahjalalShohag/code-library :: Graph Theory/Long Path Decomposition.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" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::array<int, 2>, std::allocator<std::array<int, 2>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::array<int, 2>, std::allocator<std::array<int, 2>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::array<int, 2>, std::allocator<std::array<int, 2>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::array<int, 2>, std::allocator<std::array<int, 2>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%"struct.std::array" = type { [2 x i32] }

@g = external dso_local global [100009 x %"class.std::vector"], align 16
@d = external dso_local global [100009 x i64], align 16
@mx = external dso_local global i64, align 8
@x = external dso_local global i32, align 4

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %7 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %8 = alloca %"struct.std::array", align 4
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [100009 x i64], ptr @d, i64 0, i64 %12
  %14 = load i64, ptr %13, align 8, !tbaa !9
  %15 = load i64, ptr @mx, align 8, !tbaa !9
  %16 = icmp sge i64 %14, %15
  br i1 %16, label %17, label %23

17:                                               ; preds = %2
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [100009 x i64], ptr @d, i64 0, i64 %19
  %21 = load i64, ptr %20, align 8, !tbaa !9
  store i64 %21, ptr @mx, align 8, !tbaa !9
  %22 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %22, ptr @x, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %17, %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %24 = load i32, ptr %3, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [100009 x %"class.std::vector"], ptr @g, i64 0, i64 %25
  store ptr %26, ptr %5, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %27 = load ptr, ptr %5, align 8, !tbaa !11
  %28 = call ptr @_ZNSt6vectorISt5arrayIiLm2EESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %27) #5
  %29 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %6, i32 0, i32 0
  store ptr %28, ptr %29, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #5
  %30 = load ptr, ptr %5, align 8, !tbaa !11
  %31 = call ptr @_ZNSt6vectorISt5arrayIiLm2EESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %30) #5
  %32 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %7, i32 0, i32 0
  store ptr %31, ptr %32, align 8
  br label %33

33:                                               ; preds = %62, %23
  %34 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt5arrayIiLm2EESt6vectorIS2_SaIS2_EEEEbRKNS_17__normal_iteratorIT_T0_EESC_(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef nonnull align 8 dereferenceable(8) %7) #5
  br i1 %34, label %36, label %35

35:                                               ; preds = %33
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  br label %64

36:                                               ; preds = %33
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  %37 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt5arrayIiLm2EESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #5
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %8, ptr align 4 %37, i64 8, i1 false), !tbaa.struct !13
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #5
  %38 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm0EiLm2EEOT0_OSt5arrayIS0_XT1_EE(ptr noundef nonnull align 4 dereferenceable(8) %8) #5
  store ptr %38, ptr %9, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #5
  %39 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm1EiLm2EEOT0_OSt5arrayIS0_XT1_EE(ptr noundef nonnull align 4 dereferenceable(8) %8) #5
  store ptr %39, ptr %10, align 8, !tbaa !11
  %40 = load ptr, ptr %9, align 8, !tbaa !11
  %41 = load i32, ptr %40, align 4, !tbaa !5
  %42 = load i32, ptr %4, align 4, !tbaa !5
  %43 = xor i32 %41, %42
  %44 = icmp ne i32 %43, 0
  br i1 %44, label %45, label %61

45:                                               ; preds = %36
  %46 = load i32, ptr %3, align 4, !tbaa !5
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds [100009 x i64], ptr @d, i64 0, i64 %47
  %49 = load i64, ptr %48, align 8, !tbaa !9
  %50 = load ptr, ptr %10, align 8, !tbaa !11
  %51 = load i32, ptr %50, align 4, !tbaa !5
  %52 = sext i32 %51 to i64
  %53 = add nsw i64 %49, %52
  %54 = load ptr, ptr %9, align 8, !tbaa !11
  %55 = load i32, ptr %54, align 4, !tbaa !5
  %56 = sext i32 %55 to i64
  %57 = getelementptr inbounds [100009 x i64], ptr @d, i64 0, i64 %56
  store i64 %53, ptr %57, align 8, !tbaa !9
  %58 = load ptr, ptr %9, align 8, !tbaa !11
  %59 = load i32, ptr %58, align 4, !tbaa !5
  %60 = load i32, ptr %3, align 4, !tbaa !5
  call void @_Z3dfsii(i32 noundef %59, i32 noundef %60)
  br label %61

61:                                               ; preds = %45, %36
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  br label %62

62:                                               ; preds = %61
  %63 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt5arrayIiLm2EESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #5
  br label %33

64:                                               ; preds = %35
  ret void
}

; 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 @_ZNSt6vectorISt5arrayIiLm2EESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt5arrayIiLm2EESaIS1_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_cxxneIPSt5arrayIiLm2EESt6vectorIS2_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_iteratorIPSt5arrayIiLm2EESt6vectorIS2_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: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm0EiLm2EEOT0_OSt5arrayIS0_XT1_EE(ptr noundef nonnull align 4 dereferenceable(8)) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm1EiLm2EEOT0_OSt5arrayIS0_XT1_EE(ptr noundef nonnull align 4 dereferenceable(8)) #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_iteratorIPSt5arrayIiLm2EESt6vectorIS2_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 = !{!"long long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"any pointer", !7, i64 0}
!13 = !{i64 0, i64 8, !14}
!14 = !{!7, !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<std::array<int, 2>, std::allocator<std::array<int, 2>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::array<int, 2>, std::allocator<std::array<int, 2>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::array<int, 2>, std::allocator<std::array<int, 2>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::array<int, 2>, std::allocator<std::array<int, 2>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }
%"struct.std::array" = type { [2 x i32] }

@g = external dso_local global [100009 x %"class.std::vector"], align 16
@d = external dso_local local_unnamed_addr global [100009 x i64], align 16
@mx = external dso_local local_unnamed_addr global i64, align 8
@x = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_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 = alloca %"struct.std::array", align 8
  %6 = sext i32 %0 to i64
  %7 = getelementptr inbounds [100009 x i64], ptr @d, i64 0, i64 %6
  %8 = load i64, ptr %7, align 8, !tbaa !5
  %9 = load i64, ptr @mx, align 8, !tbaa !5
  %.not = icmp slt i64 %8, %9
  br i1 %.not, label %11, label %10

10:                                               ; preds = %2
  store i64 %8, ptr @mx, align 8, !tbaa !5
  store i32 %0, ptr @x, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %10, %2
  %12 = getelementptr inbounds [100009 x %"class.std::vector"], ptr @g, i64 0, i64 %6
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %13 = tail call ptr @_ZNSt6vectorISt5arrayIiLm2EESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %12) #3
  store ptr %13, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %14 = tail call ptr @_ZNSt6vectorISt5arrayIiLm2EESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %12) #3
  store ptr %14, ptr %4, align 8
  %15 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt5arrayIiLm2EESt6vectorIS2_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 %15, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %28, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  ret void

.lr.ph:                                           ; preds = %11, %28
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #3
  %16 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNK9__gnu_cxx17__normal_iteratorIPSt5arrayIiLm2EESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %17 = load i64, ptr %16, align 4, !tbaa !11
  store i64 %17, ptr %5, align 8, !tbaa !11
  %18 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm0EiLm2EEOT0_OSt5arrayIS0_XT1_EE(ptr noundef nonnull align 4 dereferenceable(8) %5) #3
  %19 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm1EiLm2EEOT0_OSt5arrayIS0_XT1_EE(ptr noundef nonnull align 4 dereferenceable(8) %5) #3
  %20 = load i32, ptr %18, align 4, !tbaa !9
  %.not12 = icmp eq i32 %20, %1
  br i1 %.not12, label %28, label %21

21:                                               ; preds = %.lr.ph
  %22 = load i64, ptr %7, align 8, !tbaa !5
  %23 = load i32, ptr %19, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = add nsw i64 %22, %24
  %26 = sext i32 %20 to i64
  %27 = getelementptr inbounds [100009 x i64], ptr @d, i64 0, i64 %26
  store i64 %25, ptr %27, align 8, !tbaa !5
  call void @_Z3dfsii(i32 noundef %20, i32 noundef %0)
  br label %28

28:                                               ; preds = %21, %.lr.ph
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  %29 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN9__gnu_cxx17__normal_iteratorIPSt5arrayIiLm2EESt6vectorIS2_SaIS2_EEEppEv(ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  %30 = call noundef zeroext i1 @_ZN9__gnu_cxxneIPSt5arrayIiLm2EESt6vectorIS2_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 %30, label %.lr.ph, label %._crit_edge
}

; 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 @_ZNSt6vectorISt5arrayIiLm2EESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt5arrayIiLm2EESaIS1_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_cxxneIPSt5arrayIiLm2EESt6vectorIS2_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_iteratorIPSt5arrayIiLm2EESt6vectorIS2_SaIS2_EEEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm0EiLm2EEOT0_OSt5arrayIS0_XT1_EE(ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3getILm1EiLm2EEOT0_OSt5arrayIS0_XT1_EE(ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #0

; 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_iteratorIPSt5arrayIiLm2EESt6vectorIS2_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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass