; LLVM IR from ADJA/algos :: Graphs/HLD.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<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@timer = external dso_local global i32, align 4
@sz = external dso_local global [105000 x i32], align 16
@tin = external dso_local global [105000 x i32], align 16
@tout = external dso_local global [105000 x i32], align 16
@g = external dso_local global [105000 x %"class.std::vector"], align 16
@p = external dso_local global [105000 x i32], align 16

; 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 i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  %8 = load i32, ptr @timer, align 4, !tbaa !5
  %9 = add nsw i32 %8, 1
  store i32 %9, ptr @timer, align 4, !tbaa !5
  %10 = load i32, ptr @timer, align 4, !tbaa !5
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [105000 x i32], ptr @tin, i64 0, i64 %12
  store i32 %10, ptr %13, align 4, !tbaa !5
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [105000 x i32], ptr @p, i64 0, i64 %16
  store i32 %14, ptr %17, align 4, !tbaa !5
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [105000 x i32], ptr @sz, i64 0, i64 %19
  store i32 1, ptr %20, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %57, %2
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = load i32, ptr %3, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [105000 x %"class.std::vector"], ptr @g, i64 0, i64 %24
  %26 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %25) #3
  %27 = trunc i64 %26 to i32
  %28 = icmp slt i32 %22, %27
  br i1 %28, label %30, label %29

29:                                               ; preds = %21
  store i32 2, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %60

30:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %31 = load i32, ptr %3, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [105000 x %"class.std::vector"], ptr @g, i64 0, i64 %32
  %34 = load i32, ptr %5, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %33, i64 noundef %35) #3
  %37 = load i32, ptr %36, align 4, !tbaa !5
  store i32 %37, ptr %7, align 4, !tbaa !5
  %38 = load i32, ptr %7, align 4, !tbaa !5
  %39 = load i32, ptr %4, align 4, !tbaa !5
  %40 = icmp eq i32 %38, %39
  br i1 %40, label %41, label %42

41:                                               ; preds = %30
  store i32 4, ptr %6, align 4
  br label %54

42:                                               ; preds = %30
  %43 = load i32, ptr %7, align 4, !tbaa !5
  %44 = load i32, ptr %3, align 4, !tbaa !5
  call void @_Z3dfsii(i32 noundef %43, i32 noundef %44)
  %45 = load i32, ptr %7, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds [105000 x i32], ptr @sz, i64 0, i64 %46
  %48 = load i32, ptr %47, align 4, !tbaa !5
  %49 = load i32, ptr %3, align 4, !tbaa !5
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds [105000 x i32], ptr @sz, i64 0, i64 %50
  %52 = load i32, ptr %51, align 4, !tbaa !5
  %53 = add nsw i32 %52, %48
  store i32 %53, ptr %51, align 4, !tbaa !5
  store i32 0, ptr %6, align 4
  br label %54

54:                                               ; preds = %42, %41
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  %55 = load i32, ptr %6, align 4
  switch i32 %55, label %67 [
    i32 0, label %56
    i32 4, label %57
  ]

56:                                               ; preds = %54
  br label %57

57:                                               ; preds = %56, %54
  %58 = load i32, ptr %5, align 4, !tbaa !5
  %59 = add nsw i32 %58, 1
  store i32 %59, ptr %5, align 4, !tbaa !5
  br label %21, !llvm.loop !9

60:                                               ; preds = %29
  %61 = load i32, ptr @timer, align 4, !tbaa !5
  %62 = add nsw i32 %61, 1
  store i32 %62, ptr @timer, align 4, !tbaa !5
  %63 = load i32, ptr @timer, align 4, !tbaa !5
  %64 = load i32, ptr %3, align 4, !tbaa !5
  %65 = sext i32 %64 to i64
  %66 = getelementptr inbounds [105000 x i32], ptr @tout, i64 0, i64 %65
  store i32 %63, ptr %66, align 4, !tbaa !5
  ret void

67:                                               ; preds = %54
  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 noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

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

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 = { 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"}


; 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<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@timer = external dso_local local_unnamed_addr global i32, align 4
@sz = external dso_local local_unnamed_addr global [105000 x i32], align 16
@tin = external dso_local local_unnamed_addr global [105000 x i32], align 16
@tout = external dso_local local_unnamed_addr global [105000 x i32], align 16
@g = external dso_local global [105000 x %"class.std::vector"], align 16
@p = external dso_local local_unnamed_addr global [105000 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z3dfsii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = load i32, ptr @timer, align 4, !tbaa !5
  %4 = add nsw i32 %3, 1
  store i32 %4, ptr @timer, align 4, !tbaa !5
  %5 = sext i32 %0 to i64
  %6 = getelementptr inbounds [105000 x i32], ptr @tin, i64 0, i64 %5
  store i32 %4, ptr %6, align 4, !tbaa !5
  %7 = getelementptr inbounds [105000 x i32], ptr @p, i64 0, i64 %5
  store i32 %1, ptr %7, align 4, !tbaa !5
  %8 = getelementptr inbounds [105000 x i32], ptr @sz, i64 0, i64 %5
  store i32 1, ptr %8, align 4, !tbaa !5
  %9 = getelementptr inbounds [105000 x %"class.std::vector"], ptr @g, i64 0, i64 %5
  %10 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %9) #1
  %11 = trunc i64 %10 to i32
  %12 = icmp sgt i32 %11, 0
  br i1 %12, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %25, %2
  %13 = load i32, ptr @timer, align 4, !tbaa !5
  %14 = add nsw i32 %13, 1
  store i32 %14, ptr @timer, align 4, !tbaa !5
  %15 = getelementptr inbounds [105000 x i32], ptr @tout, i64 0, i64 %5
  store i32 %14, ptr %15, align 4, !tbaa !5
  ret void

.lr.ph:                                           ; preds = %2, %25
  %indvars.iv = phi i64 [ %indvars.iv.next, %25 ], [ 0, %2 ]
  %16 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %9, i64 noundef %indvars.iv) #1
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = icmp eq i32 %17, %1
  br i1 %18, label %25, label %19

19:                                               ; preds = %.lr.ph
  tail call void @_Z3dfsii(i32 noundef %17, i32 noundef %0)
  %20 = sext i32 %17 to i64
  %21 = getelementptr inbounds [105000 x i32], ptr @sz, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = load i32, ptr %8, align 4, !tbaa !5
  %24 = add nsw i32 %23, %22
  store i32 %24, ptr %8, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %.lr.ph, %19
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %26 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %9) #1
  %sext = shl i64 %26, 32
  %27 = ashr exact i64 %sext, 32
  %28 = icmp slt i64 %indvars.iv.next, %27
  br i1 %28, label %.lr.ph, label %._crit_edge, !llvm.loop !9
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) 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 = { 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"}


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