; LLVM IR from VAR-solutions/Algorithms :: Tree/segment tree/cpp (Inversion Count Segment tree)

; 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"

%struct.nud = type { i64, i64 }
%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@tree = external dso_local global [800001 x i64], align 16
@sum = external dso_local global i64, align 8
@a = external dso_local global [200001 x %struct.nud], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z3cmp3nudS_(i64, i64, i64, i64) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z5queryxxxx(i64 noundef, i64 noundef, i64 noundef, i64 noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #3 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #6
  %7 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %2)
  br label %8

8:                                                ; preds = %47, %0
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = add nsw i64 %9, -1
  store i64 %10, ptr %2, align 8, !tbaa !5
  %11 = icmp ne i64 %9, 0
  br i1 %11, label %12, label %51

12:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #6
  %13 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #6
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #6
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #6
  store i64 0, ptr %6, align 8, !tbaa !5
  store i64 0, ptr @sum, align 8, !tbaa !5
  call void @llvm.memset.p0.i64(ptr align 16 @tree, i8 0, i64 6400008, i1 false)
  store i64 1, ptr %4, align 8, !tbaa !5
  br label %14

14:                                               ; preds = %27, %12
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = load i64, ptr %3, align 8, !tbaa !5
  %17 = icmp sle i64 %15, %16
  br i1 %17, label %18, label %30

18:                                               ; preds = %14
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = getelementptr inbounds [200001 x %struct.nud], ptr @a, i64 0, i64 %19
  %21 = getelementptr inbounds %struct.nud, ptr %20, i32 0, i32 0
  %22 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %21)
  %23 = load i64, ptr %4, align 8, !tbaa !5
  %24 = load i64, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds [200001 x %struct.nud], ptr @a, i64 0, i64 %24
  %26 = getelementptr inbounds %struct.nud, ptr %25, i32 0, i32 1
  store i64 %23, ptr %26, align 8, !tbaa !9
  br label %27

27:                                               ; preds = %18
  %28 = load i64, ptr %4, align 8, !tbaa !5
  %29 = add nsw i64 %28, 1
  store i64 %29, ptr %4, align 8, !tbaa !5
  br label %14, !llvm.loop !11

30:                                               ; preds = %14
  %31 = load i64, ptr %3, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.nud, ptr @a, i64 %31
  %33 = getelementptr inbounds %struct.nud, ptr %32, i64 1
  call void @_ZSt4sortIP3nudPFbS0_S0_EEvT_S4_T0_(ptr noundef getelementptr inbounds (%struct.nud, ptr @a, i64 1), ptr noundef %33, ptr noundef @_Z3cmp3nudS_)
  store i64 1, ptr %4, align 8, !tbaa !5
  br label %34

34:                                               ; preds = %44, %30
  %35 = load i64, ptr %4, align 8, !tbaa !5
  %36 = load i64, ptr %3, align 8, !tbaa !5
  %37 = icmp sle i64 %35, %36
  br i1 %37, label %38, label %47

38:                                               ; preds = %34
  %39 = load i64, ptr %3, align 8, !tbaa !5
  %40 = load i64, ptr %4, align 8, !tbaa !5
  %41 = getelementptr inbounds [200001 x %struct.nud], ptr @a, i64 0, i64 %40
  %42 = getelementptr inbounds %struct.nud, ptr %41, i32 0, i32 1
  %43 = load i64, ptr %42, align 8, !tbaa !9
  call void @_Z5queryxxxx(i64 noundef 1, i64 noundef 1, i64 noundef %39, i64 noundef %43)
  br label %44

44:                                               ; preds = %38
  %45 = load i64, ptr %4, align 8, !tbaa !5
  %46 = add nsw i64 %45, 1
  store i64 %46, ptr %4, align 8, !tbaa !5
  br label %34, !llvm.loop !13

47:                                               ; preds = %34
  %48 = load i64, ptr @sum, align 8, !tbaa !5
  %49 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %48)
  %50 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %49, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #6
  br label %8, !llvm.loop !14

51:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #6
  ret i32 0
}

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIP3nudPFbS0_S0_EEvT_S4_T0_(ptr noundef, ptr noundef, ptr noundef) #5

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) #1 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #5

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 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 #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { mustprogress norecurse 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: write) }
attributes #5 = { inlinehint 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 #6 = { 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, !6, i64 8}
!10 = !{!"_ZTS3nud", !6, i64 0, !6, i64 8}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}
!14 = distinct !{!14, !12}


; 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"

%struct.nud = type { i64, i64 }
%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@tree = external dso_local local_unnamed_addr global [800001 x i64], align 16
@sum = external dso_local local_unnamed_addr global i64, align 8
@a = external dso_local global [200001 x %struct.nud], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z3cmp3nudS_(i64, i64, i64, i64) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z5queryxxxx(i64 noundef, i64 noundef, i64 noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #3 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #6
  %3 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %1)
  %4 = load i64, ptr %1, align 8, !tbaa !5
  %5 = add nsw i64 %4, -1
  store i64 %5, ptr %1, align 8, !tbaa !5
  %.not19 = icmp eq i64 %4, 0
  br i1 %.not19, label %._crit_edge22, label %.lr.ph21

.lr.ph21:                                         ; preds = %0, %._crit_edge18
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #6
  %6 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %2)
  store i64 0, ptr @sum, align 8, !tbaa !5
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(6400008) @tree, i8 0, i64 6400008, i1 false)
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %.not1012 = icmp slt i64 %7, 1
  br i1 %.not1012, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph21, %.lr.ph
  %.013 = phi i64 [ %11, %.lr.ph ], [ 1, %.lr.ph21 ]
  %8 = getelementptr inbounds [200001 x %struct.nud], ptr @a, i64 0, i64 %.013
  %9 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %8)
  %10 = getelementptr inbounds i8, ptr %8, i64 8
  store i64 %.013, ptr %10, align 8, !tbaa !9
  %11 = add nuw nsw i64 %.013, 1
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %.not10.not = icmp slt i64 %.013, %12
  br i1 %.not10.not, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph21
  %.lcssa = phi i64 [ %7, %.lr.ph21 ], [ %12, %.lr.ph ]
  %gep = getelementptr %struct.nud, ptr getelementptr inbounds (i8, ptr @a, i64 16), i64 %.lcssa
  call void @_ZSt4sortIP3nudPFbS0_S0_EEvT_S4_T0_(ptr noundef nonnull getelementptr inbounds (i8, ptr @a, i64 16), ptr noundef nonnull %gep, ptr noundef nonnull @_Z3cmp3nudS_)
  %13 = load i64, ptr %2, align 8, !tbaa !5
  %.not1114 = icmp slt i64 %13, 1
  br i1 %.not1114, label %._crit_edge18, label %.lr.ph17

.lr.ph17:                                         ; preds = %._crit_edge, %.lr.ph17
  %14 = phi i64 [ %18, %.lr.ph17 ], [ %13, %._crit_edge ]
  %.115 = phi i64 [ %17, %.lr.ph17 ], [ 1, %._crit_edge ]
  %15 = getelementptr inbounds [200001 x %struct.nud], ptr @a, i64 0, i64 %.115, i32 1
  %16 = load i64, ptr %15, align 8, !tbaa !9
  call void @_Z5queryxxxx(i64 noundef 1, i64 noundef 1, i64 noundef %14, i64 noundef %16)
  %17 = add nuw nsw i64 %.115, 1
  %18 = load i64, ptr %2, align 8, !tbaa !5
  %.not11.not = icmp slt i64 %.115, %18
  br i1 %.not11.not, label %.lr.ph17, label %._crit_edge18, !llvm.loop !13

._crit_edge18:                                    ; preds = %.lr.ph17, %._crit_edge
  %19 = load i64, ptr @sum, align 8, !tbaa !5
  %20 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %19)
  %21 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %20, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #6
  %22 = load i64, ptr %1, align 8, !tbaa !5
  %23 = add nsw i64 %22, -1
  store i64 %23, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %22, 0
  br i1 %.not, label %._crit_edge22, label %.lr.ph21, !llvm.loop !14

._crit_edge22:                                    ; preds = %._crit_edge18, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #6
  ret i32 0
}

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIP3nudPFbS0_S0_EEvT_S4_T0_(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #5

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #5

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 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 #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { mustprogress norecurse 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #5 = { inlinehint 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 #6 = { 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, !6, i64 8}
!10 = !{!"_ZTS3nud", !6, i64 0, !6, i64 8}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}
!14 = distinct !{!14, !12}


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