; LLVM IR from UtkarshPathrabe/Competitive-Coding :: HackerRank Solutions/Algorithms/Arrays And Sorting (Counting Sort 3)

; 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::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" }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca [100 x i32], align 16
  %4 = alloca [100 x i32], align 16
  %5 = alloca i32, align 4
  %6 = alloca [50 x i8], align 16
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  call void @llvm.lifetime.start.p0(i64 400, ptr %3) #5
  call void @llvm.memset.p0.i64(ptr align 16 %3, i8 0, i64 400, i1 false)
  call void @llvm.lifetime.start.p0(i64 400, ptr %4) #5
  call void @llvm.memset.p0.i64(ptr align 16 %4, i8 0, i64 400, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  call void @llvm.lifetime.start.p0(i64 50, ptr %6) #5
  %10 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %2)
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %25, %0
  %12 = load i32, ptr %7, align 4, !tbaa !5
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = icmp slt i32 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  br label %28

16:                                               ; preds = %11
  %17 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %5)
  %18 = getelementptr inbounds [50 x i8], ptr %6, i64 0, i64 0
  %19 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcEERSt13basic_istreamIT_T0_ES6_PS3_(ptr noundef nonnull align 8 dereferenceable(16) %17, ptr noundef %18)
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [100 x i32], ptr %3, i64 0, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = add nsw i32 %23, 1
  store i32 %24, ptr %22, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %16
  %26 = load i32, ptr %7, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %7, align 4, !tbaa !5
  br label %11, !llvm.loop !9

28:                                               ; preds = %15
  %29 = getelementptr inbounds [100 x i32], ptr %3, i64 0, i64 0
  %30 = load i32, ptr %29, align 16, !tbaa !5
  %31 = getelementptr inbounds [100 x i32], ptr %4, i64 0, i64 0
  store i32 %30, ptr %31, align 16, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #5
  store i32 1, ptr %8, align 4, !tbaa !5
  br label %32

32:                                               ; preds = %50, %28
  %33 = load i32, ptr %8, align 4, !tbaa !5
  %34 = icmp slt i32 %33, 100
  br i1 %34, label %36, label %35

35:                                               ; preds = %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #5
  br label %53

36:                                               ; preds = %32
  %37 = load i32, ptr %8, align 4, !tbaa !5
  %38 = sub nsw i32 %37, 1
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [100 x i32], ptr %4, i64 0, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !5
  %42 = load i32, ptr %8, align 4, !tbaa !5
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [100 x i32], ptr %3, i64 0, i64 %43
  %45 = load i32, ptr %44, align 4, !tbaa !5
  %46 = add nsw i32 %41, %45
  %47 = load i32, ptr %8, align 4, !tbaa !5
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds [100 x i32], ptr %4, i64 0, i64 %48
  store i32 %46, ptr %49, align 4, !tbaa !5
  br label %50

50:                                               ; preds = %36
  %51 = load i32, ptr %8, align 4, !tbaa !5
  %52 = add nsw i32 %51, 1
  store i32 %52, ptr %8, align 4, !tbaa !5
  br label %32, !llvm.loop !11

53:                                               ; preds = %35
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #5
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %54

54:                                               ; preds = %65, %53
  %55 = load i32, ptr %9, align 4, !tbaa !5
  %56 = icmp slt i32 %55, 100
  br i1 %56, label %58, label %57

57:                                               ; preds = %54
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #5
  br label %68

58:                                               ; preds = %54
  %59 = load i32, ptr %9, align 4, !tbaa !5
  %60 = sext i32 %59 to i64
  %61 = getelementptr inbounds [100 x i32], ptr %4, i64 0, i64 %60
  %62 = load i32, ptr %61, align 4, !tbaa !5
  %63 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %62)
  %64 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %63, ptr noundef @.str)
  br label %65

65:                                               ; preds = %58
  %66 = load i32, ptr %9, align 4, !tbaa !5
  %67 = add nsw i32 %66, 1
  store i32 %67, ptr %9, align 4, !tbaa !5
  br label %54, !llvm.loop !12

68:                                               ; preds = %57
  call void @llvm.lifetime.end.p0(i64 50, ptr %6) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 400, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 400, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  ret i32 0
}

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

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #3

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcEERSt13basic_istreamIT_T0_ES6_PS3_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull) #4

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #4

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #3

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { "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 = { 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 #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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; 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::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" }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca [100 x i32], align 16
  %3 = alloca [100 x i32], align 16
  %4 = alloca i32, align 4
  %5 = alloca [50 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  call void @llvm.lifetime.start.p0(i64 400, ptr nonnull %2) #5
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(400) %2, i8 0, i64 400, i1 false)
  call void @llvm.lifetime.start.p0(i64 400, ptr nonnull %3) #5
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(400) %3, i8 0, i64 400, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #5
  call void @llvm.lifetime.start.p0(i64 50, ptr nonnull %5) #5
  %6 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %7 = load i32, ptr %1, align 4, !tbaa !5
  %8 = icmp sgt i32 %7, 0
  br i1 %8, label %.lr.ph, label %._crit_edge

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %.pre = load i32, ptr %2, align 16, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %0
  %9 = phi i32 [ %.pre, %._crit_edge.loopexit ], [ 0, %0 ]
  store i32 %9, ptr %3, align 16, !tbaa !5
  br label %20

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.01112 = phi i32 [ %17, %.lr.ph ], [ 0, %0 ]
  %10 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %11 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcEERSt13basic_istreamIT_T0_ES6_PS3_(ptr noundef nonnull align 8 dereferenceable(16) %10, ptr noundef %5)
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [100 x i32], ptr %2, i64 0, i64 %13
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = add nsw i32 %15, 1
  store i32 %16, ptr %14, align 4, !tbaa !5
  %17 = add nuw nsw i32 %.01112, 1
  %18 = load i32, ptr %1, align 4, !tbaa !5
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %.lr.ph, label %._crit_edge.loopexit, !llvm.loop !9

20:                                               ; preds = %20, %._crit_edge
  %21 = phi i32 [ %9, %._crit_edge ], [ %32, %20 ]
  %indvars.iv = phi i64 [ 1, %._crit_edge ], [ %indvars.iv.next.2, %20 ]
  %22 = getelementptr inbounds [100 x i32], ptr %2, i64 0, i64 %indvars.iv
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = add nsw i32 %23, %21
  %25 = getelementptr inbounds [100 x i32], ptr %3, i64 0, i64 %indvars.iv
  store i32 %24, ptr %25, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %26 = getelementptr inbounds [100 x i32], ptr %2, i64 0, i64 %indvars.iv.next
  %27 = load i32, ptr %26, align 4, !tbaa !5
  %28 = add nsw i32 %27, %24
  %29 = getelementptr inbounds [100 x i32], ptr %3, i64 0, i64 %indvars.iv.next
  store i32 %28, ptr %29, align 4, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %30 = getelementptr inbounds [100 x i32], ptr %2, i64 0, i64 %indvars.iv.next.1
  %31 = load i32, ptr %30, align 4, !tbaa !5
  %32 = add nsw i32 %31, %28
  %33 = getelementptr inbounds [100 x i32], ptr %3, i64 0, i64 %indvars.iv.next.1
  store i32 %32, ptr %33, align 4, !tbaa !5
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %exitcond.not.2 = icmp eq i64 %indvars.iv.next.2, 100
  br i1 %exitcond.not.2, label %.preheader, label %20, !llvm.loop !11

34:                                               ; preds = %.preheader
  call void @llvm.lifetime.end.p0(i64 50, ptr nonnull %5) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #5
  call void @llvm.lifetime.end.p0(i64 400, ptr nonnull %3) #5
  call void @llvm.lifetime.end.p0(i64 400, ptr nonnull %2) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret i32 0

.preheader:                                       ; preds = %20, %.preheader
  %indvars.iv16 = phi i64 [ %indvars.iv.next17, %.preheader ], [ 0, %20 ]
  %35 = getelementptr inbounds [100 x i32], ptr %3, i64 0, i64 %indvars.iv16
  %36 = load i32, ptr %35, align 4, !tbaa !5
  %37 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %36)
  %38 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %37, ptr noundef nonnull @.str)
  %indvars.iv.next17 = add nuw nsw i64 %indvars.iv16, 1
  %exitcond19.not = icmp eq i64 %indvars.iv.next17, 100
  br i1 %exitcond19.not, label %34, label %.preheader, !llvm.loop !12
}

; 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 nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #3

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZStrsIcSt11char_traitsIcEERSt13basic_istreamIT_T0_ES6_PS3_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull) local_unnamed_addr #4

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #4

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #3

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { "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 = { 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 #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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; Effective O3 passes: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass