; LLVM IR from devparthgarg/Data-Structures-and-Algorithms :: 05. Arrays/30 Check if Subarray with Zero Sum (30 Check if Subarray with Zero sum)

; 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::unordered_set" = type { %"class.std::_Hashtable" }
%"class.std::_Hashtable" = type { ptr, i64, %"struct.std::__detail::_Hash_node_base", i64, %"struct.std::__detail::_Prime_rehash_policy", ptr }
%"struct.std::__detail::_Hash_node_base" = type { ptr }
%"struct.std::__detail::_Prime_rehash_policy" = type { float, i64 }
%"struct.std::__detail::_Node_iterator" = type { %"struct.std::__detail::_Node_iterator_base" }
%"struct.std::__detail::_Node_iterator_base" = type { ptr }
%"struct.std::pair" = type <{ %"struct.std::__detail::_Node_iterator", i8, [7 x i8] }>

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z17checkSubarray0SumPii(ptr noundef %0, i32 noundef %1) #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca %"class.std::unordered_set", align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca %"struct.std::__detail::_Node_iterator", align 8
  %11 = alloca ptr, align 8
  %12 = alloca i32, align 4
  %13 = alloca %"struct.std::__detail::_Node_iterator", align 8
  %14 = alloca %"struct.std::pair", align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 0, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 56, ptr %7) #4
  call void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(56) %7) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %57, %2
  %16 = load i32, ptr %8, align 4, !tbaa !9
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = icmp slt i32 %16, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %15
  store i32 2, ptr %9, align 4
  br label %60

20:                                               ; preds = %15
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = load i32, ptr %8, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i32, ptr %21, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !9
  %26 = load i32, ptr %6, align 4, !tbaa !9
  %27 = add nsw i32 %26, %25
  store i32 %27, ptr %6, align 4, !tbaa !9
  %28 = load i32, ptr %6, align 4, !tbaa !9
  %29 = icmp eq i32 %28, 0
  br i1 %29, label %30, label %31

30:                                               ; preds = %20
  store i32 1, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %60

31:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %32 = invoke ptr @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE4findERKi(ptr noundef nonnull align 8 dereferenceable(56) %7, ptr noundef nonnull align 4 dereferenceable(4) %6)
          to label %33 unwind label %41

33:                                               ; preds = %31
  %34 = getelementptr inbounds %"struct.std::__detail::_Node_iterator", ptr %10, i32 0, i32 0
  %35 = getelementptr inbounds %"struct.std::__detail::_Node_iterator_base", ptr %34, i32 0, i32 0
  store ptr %32, ptr %35, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #4
  %36 = call ptr @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(56) %7) #4
  %37 = getelementptr inbounds %"struct.std::__detail::_Node_iterator", ptr %13, i32 0, i32 0
  %38 = getelementptr inbounds %"struct.std::__detail::_Node_iterator_base", ptr %37, i32 0, i32 0
  store ptr %36, ptr %38, align 8
  %39 = call noundef zeroext i1 @_ZNSt8__detailneERKNS_19_Node_iterator_baseIiLb0EEES3_(ptr noundef nonnull align 8 dereferenceable(8) %10, ptr noundef nonnull align 8 dereferenceable(8) %13) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  br i1 %39, label %40, label %45

40:                                               ; preds = %33
  store i32 1, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %60

41:                                               ; preds = %31
  %42 = landingpad { ptr, i32 }
          cleanup
  %43 = extractvalue { ptr, i32 } %42, 0
  store ptr %43, ptr %11, align 8
  %44 = extractvalue { ptr, i32 } %42, 1
  store i32 %44, ptr %12, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  br label %62

45:                                               ; preds = %33
  %46 = invoke { ptr, i8 } @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE6insertERKi(ptr noundef nonnull align 8 dereferenceable(56) %7, ptr noundef nonnull align 4 dereferenceable(4) %6)
          to label %47 unwind label %52

47:                                               ; preds = %45
  %48 = getelementptr inbounds { ptr, i8 }, ptr %14, i32 0, i32 0
  %49 = extractvalue { ptr, i8 } %46, 0
  store ptr %49, ptr %48, align 8
  %50 = getelementptr inbounds { ptr, i8 }, ptr %14, i32 0, i32 1
  %51 = extractvalue { ptr, i8 } %46, 1
  store i8 %51, ptr %50, align 8
  br label %56

52:                                               ; preds = %45
  %53 = landingpad { ptr, i32 }
          cleanup
  %54 = extractvalue { ptr, i32 } %53, 0
  store ptr %54, ptr %11, align 8
  %55 = extractvalue { ptr, i32 } %53, 1
  store i32 %55, ptr %12, align 4
  br label %62

56:                                               ; preds = %47
  br label %57

57:                                               ; preds = %56
  %58 = load i32, ptr %8, align 4, !tbaa !9
  %59 = add nsw i32 %58, 1
  store i32 %59, ptr %8, align 4, !tbaa !9
  br label %15, !llvm.loop !11

60:                                               ; preds = %40, %30, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  %61 = load i32, ptr %9, align 4
  switch i32 %61, label %64 [
    i32 2, label %63
  ]

62:                                               ; preds = %52, %41
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  call void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(56) %7) #4
  call void @llvm.lifetime.end.p0(i64 56, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  br label %66

63:                                               ; preds = %60
  store i32 0, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %64

64:                                               ; preds = %63, %60
  call void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(56) %7) #4
  call void @llvm.lifetime.end.p0(i64 56, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  %65 = load i32, ptr %3, align 4
  ret i32 %65

66:                                               ; preds = %62
  %67 = load ptr, ptr %11, align 8
  %68 = load i32, ptr %12, align 4
  %69 = insertvalue { ptr, i32 } poison, ptr %67, 0
  %70 = insertvalue { ptr, i32 } %69, i32 %68, 1
  resume { ptr, i32 } %70
}

; 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 void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(56)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNSt8__detailneERKNS_19_Node_iterator_baseIiLb0EEES3_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE4findERKi(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(56)) #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 uwtable
declare dso_local { ptr, i8 } @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE6insertERKi(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(56)) unnamed_addr #3 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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::unordered_set" = type { %"class.std::_Hashtable" }
%"class.std::_Hashtable" = type { ptr, i64, %"struct.std::__detail::_Hash_node_base", i64, %"struct.std::__detail::_Prime_rehash_policy", ptr }
%"struct.std::__detail::_Hash_node_base" = type { ptr }
%"struct.std::__detail::_Prime_rehash_policy" = type { float, i64 }
%"struct.std::__detail::_Node_iterator" = type { %"struct.std::__detail::_Node_iterator_base" }
%"struct.std::__detail::_Node_iterator_base" = type { ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef range(i32 0, 2) i32 @_Z17checkSubarray0SumPii(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca i32, align 4
  %4 = alloca %"class.std::unordered_set", align 8
  %5 = alloca %"struct.std::__detail::_Node_iterator", align 8
  %6 = alloca %"struct.std::__detail::_Node_iterator", align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #4
  store i32 0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 56, ptr nonnull %4) #4
  call void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(56) %4) #4
  %.not15 = icmp sgt i32 %1, 0
  br i1 %.not15, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %7 = zext nneg i32 %1 to i64
  %wide.trip.count = zext nneg i32 %1 to i64
  %8 = load i32, ptr %0, align 4, !tbaa !5
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = add nsw i32 %9, %8
  store i32 %10, ptr %3, align 4, !tbaa !5
  %11 = icmp eq i32 %10, 0
  br i1 %11, label %._crit_edge, label %.lr.ph24

.lr.ph:                                           ; preds = %25
  %12 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = add nsw i32 %14, %13
  store i32 %15, ptr %3, align 4, !tbaa !5
  %16 = icmp eq i32 %15, 0
  br i1 %16, label %._crit_edge.loopexit.loopexit, label %.lr.ph24, !llvm.loop !9

.lr.ph24:                                         ; preds = %.lr.ph.preheader, %.lr.ph
  %.not1723 = phi i1 [ %.not, %.lr.ph ], [ true, %.lr.ph.preheader ]
  %indvars.iv22 = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.lr.ph.preheader ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #4
  %17 = invoke ptr @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE4findERKi(ptr noundef nonnull align 8 dereferenceable(56) %4, ptr noundef nonnull align 4 dereferenceable(4) %3)
          to label %18 unwind label %21

18:                                               ; preds = %.lr.ph24
  store ptr %17, ptr %5, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #4
  %19 = call ptr @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(56) %4) #4
  store ptr %19, ptr %6, align 8
  %20 = call noundef zeroext i1 @_ZNSt8__detailneERKNS_19_Node_iterator_baseIiLb0EEES3_(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #4
  br i1 %20, label %._crit_edge.loopexit.loopexit, label %23

21:                                               ; preds = %.lr.ph24
  %22 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #4
  br label %29

23:                                               ; preds = %18
  %24 = invoke { ptr, i8 } @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE6insertERKi(ptr noundef nonnull align 8 dereferenceable(56) %4, ptr noundef nonnull align 4 dereferenceable(4) %3)
          to label %25 unwind label %26

25:                                               ; preds = %23
  %indvars.iv.next = add nuw nsw i64 %indvars.iv22, 1
  %.not = icmp ult i64 %indvars.iv.next, %7
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge.loopexit.loopexit, label %.lr.ph, !llvm.loop !9

26:                                               ; preds = %23
  %27 = landingpad { ptr, i32 }
          cleanup
  br label %29

._crit_edge.loopexit.loopexit:                    ; preds = %18, %.lr.ph, %25
  %.not.lcssa.ph.ph = phi i1 [ %.not, %25 ], [ %.not, %.lr.ph ], [ %.not1723, %18 ]
  %28 = zext i1 %.not.lcssa.ph.ph to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.preheader, %._crit_edge.loopexit.loopexit, %2
  %.not.lcssa = phi i32 [ 0, %2 ], [ 1, %.lr.ph.preheader ], [ %28, %._crit_edge.loopexit.loopexit ]
  call void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(56) %4) #4
  call void @llvm.lifetime.end.p0(i64 56, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  ret i32 %.not.lcssa

29:                                               ; preds = %26, %21
  %.pn = phi { ptr, i32 } [ %27, %26 ], [ %22, %21 ]
  call void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(56) %4) #4
  call void @llvm.lifetime.end.p0(i64 56, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  resume { ptr, i32 } %.pn
}

; 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 void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEEC2Ev(ptr noundef nonnull align 8 dereferenceable(56)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNSt8__detailneERKNS_19_Node_iterator_baseIiLb0EEES3_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE4findERKi(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(56)) local_unnamed_addr #2 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 uwtable
declare dso_local { ptr, i8 } @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEE6insertERKi(ptr noundef nonnull align 8 dereferenceable(56), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt13unordered_setIiSt4hashIiESt8equal_toIiESaIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(56)) unnamed_addr #3 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 = { mustprogress 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 = !{!"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,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass