; LLVM IR from plskz/competitive-programming :: Junior Training Sheet/A (221)

; 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

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %12 = call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %13 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %14 = getelementptr i8, ptr %13, i64 -24
  %15 = load i64, ptr %14, align 8
  %16 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %15
  %17 = call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %16, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  store i32 0, ptr %2, align 4, !tbaa !8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  store i32 0, ptr %3, align 4, !tbaa !8
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  %18 = 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)
  %19 = load i32, ptr %4, align 4, !tbaa !8
  %20 = zext i32 %19 to i64
  %21 = call ptr @llvm.stacksave.p0()
  store ptr %21, ptr %5, align 8
  %22 = alloca i32, i64 %20, align 16
  store i64 %20, ptr %6, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  store i32 0, ptr %7, align 4, !tbaa !8
  br label %23

23:                                               ; preds = %39, %0
  %24 = load i32, ptr %7, align 4, !tbaa !8
  %25 = load i32, ptr %4, align 4, !tbaa !8
  %26 = icmp slt i32 %24, %25
  br i1 %26, label %28, label %27

27:                                               ; preds = %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  br label %42

28:                                               ; preds = %23
  %29 = load i32, ptr %7, align 4, !tbaa !8
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds i32, ptr %22, i64 %30
  %32 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %31)
  %33 = load i32, ptr %7, align 4, !tbaa !8
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds i32, ptr %22, i64 %34
  %36 = load i32, ptr %35, align 4, !tbaa !8
  %37 = load i32, ptr %3, align 4, !tbaa !8
  %38 = add nsw i32 %37, %36
  store i32 %38, ptr %3, align 4, !tbaa !8
  br label %39

39:                                               ; preds = %28
  %40 = load i32, ptr %7, align 4, !tbaa !8
  %41 = add nsw i32 %40, 1
  store i32 %41, ptr %7, align 4, !tbaa !8
  br label %23, !llvm.loop !11

42:                                               ; preds = %27
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #5
  %43 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %8)
  %44 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %43, ptr noundef nonnull align 4 dereferenceable(4) %9)
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #5
  store i32 0, ptr %10, align 4, !tbaa !8
  br label %45

45:                                               ; preds = %83, %42
  %46 = load i32, ptr %10, align 4, !tbaa !8
  %47 = load i32, ptr %4, align 4, !tbaa !8
  %48 = icmp slt i32 %46, %47
  br i1 %48, label %50, label %49

49:                                               ; preds = %45
  store i32 5, ptr %11, align 4
  br label %86

50:                                               ; preds = %45
  %51 = load i32, ptr %2, align 4, !tbaa !8
  %52 = load i32, ptr %8, align 4, !tbaa !8
  %53 = icmp sge i32 %51, %52
  br i1 %53, label %54, label %70

54:                                               ; preds = %50
  %55 = load i32, ptr %2, align 4, !tbaa !8
  %56 = load i32, ptr %9, align 4, !tbaa !8
  %57 = icmp sle i32 %55, %56
  br i1 %57, label %58, label %70

58:                                               ; preds = %54
  %59 = load i32, ptr %3, align 4, !tbaa !8
  %60 = load i32, ptr %8, align 4, !tbaa !8
  %61 = icmp sge i32 %59, %60
  br i1 %61, label %62, label %70

62:                                               ; preds = %58
  %63 = load i32, ptr %3, align 4, !tbaa !8
  %64 = load i32, ptr %9, align 4, !tbaa !8
  %65 = icmp sle i32 %63, %64
  br i1 %65, label %66, label %70

66:                                               ; preds = %62
  %67 = load i32, ptr %10, align 4, !tbaa !8
  %68 = add nsw i32 %67, 1
  %69 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %68)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %11, align 4
  br label %86

70:                                               ; preds = %62, %58, %54, %50
  %71 = load i32, ptr %10, align 4, !tbaa !8
  %72 = sext i32 %71 to i64
  %73 = getelementptr inbounds i32, ptr %22, i64 %72
  %74 = load i32, ptr %73, align 4, !tbaa !8
  %75 = load i32, ptr %2, align 4, !tbaa !8
  %76 = add nsw i32 %75, %74
  store i32 %76, ptr %2, align 4, !tbaa !8
  %77 = load i32, ptr %10, align 4, !tbaa !8
  %78 = sext i32 %77 to i64
  %79 = getelementptr inbounds i32, ptr %22, i64 %78
  %80 = load i32, ptr %79, align 4, !tbaa !8
  %81 = load i32, ptr %3, align 4, !tbaa !8
  %82 = sub nsw i32 %81, %80
  store i32 %82, ptr %3, align 4, !tbaa !8
  br label %83

83:                                               ; preds = %70
  %84 = load i32, ptr %10, align 4, !tbaa !8
  %85 = add nsw i32 %84, 1
  store i32 %85, ptr %10, align 4, !tbaa !8
  br label %45, !llvm.loop !13

86:                                               ; preds = %66, %49
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #5
  %87 = load i32, ptr %11, align 4
  switch i32 %87, label %90 [
    i32 5, label %88
  ]

88:                                               ; preds = %86
  %89 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef 0)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %11, align 4
  br label %90

90:                                               ; preds = %88, %86
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #5
  %91 = load ptr, ptr %5, align 8
  call void @llvm.stackrestore.p0(ptr %91)
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  %92 = load i32, ptr %1, align 4
  ret i32 %92
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #4

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 = { "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 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { nocallback nofree nosync nounwind willreturn }
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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !10, i64 0}
!10 = !{!"omnipotent char", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !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"

%"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

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = tail call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %5 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %6 = getelementptr i8, ptr %5, i64 -24
  %7 = load i64, ptr %6, align 8
  %8 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %7
  %9 = tail call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %8, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #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) %1)
  %11 = load i32, ptr %1, align 4, !tbaa !8
  %12 = zext i32 %11 to i64
  %13 = call ptr @llvm.stacksave.p0()
  %14 = alloca i32, i64 %12, align 16
  %15 = load i32, ptr %1, align 4, !tbaa !8
  %16 = icmp sgt i32 %15, 0
  br i1 %16, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %0
  %.022.lcssa = phi i32 [ 0, %0 ], [ %25, %.lr.ph ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #5
  %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) %2)
  %18 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %17, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %19 = load i32, ptr %1, align 4, !tbaa !8
  %.not2934 = icmp sgt i32 %19, 0
  br i1 %.not2934, label %.lr.ph39, label %.critedge

.lr.ph39:                                         ; preds = %._crit_edge
  %20 = load i32, ptr %2, align 4, !tbaa !8
  %21 = load i32, ptr %3, align 4
  %wide.trip.count = zext nneg i32 %19 to i64
  br label %29

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %.02232 = phi i32 [ %25, %.lr.ph ], [ 0, %0 ]
  %22 = getelementptr inbounds i32, ptr %14, i64 %indvars.iv
  %23 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %22)
  %24 = load i32, ptr %22, align 4, !tbaa !8
  %25 = add nsw i32 %24, %.02232
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %26 = load i32, ptr %1, align 4, !tbaa !8
  %27 = sext i32 %26 to i64
  %28 = icmp slt i64 %indvars.iv.next, %27
  br i1 %28, label %.lr.ph, label %._crit_edge, !llvm.loop !11

29:                                               ; preds = %.lr.ph39, %35
  %indvars.iv42 = phi i64 [ 0, %.lr.ph39 ], [ %indvars.iv.next43, %35 ]
  %.02136 = phi i32 [ 0, %.lr.ph39 ], [ %38, %35 ]
  %.12335 = phi i32 [ %.022.lcssa, %.lr.ph39 ], [ %39, %35 ]
  %.not = icmp slt i32 %.02136, %20
  br i1 %.not, label %35, label %30

30:                                               ; preds = %29
  %.not26 = icmp sgt i32 %.02136, %21
  %.not27 = icmp slt i32 %.12335, %20
  %.not28 = icmp sgt i32 %.12335, %21
  %31 = or i1 %.not27, %.not28
  %or.cond30 = select i1 %.not26, i1 true, i1 %31
  br i1 %or.cond30, label %35, label %32

32:                                               ; preds = %30
  %33 = trunc nuw nsw i64 %indvars.iv42 to i32
  %34 = add nuw nsw i32 %33, 1
  br label %.critedge

35:                                               ; preds = %30, %29
  %36 = getelementptr inbounds i32, ptr %14, i64 %indvars.iv42
  %37 = load i32, ptr %36, align 4, !tbaa !8
  %38 = add nsw i32 %37, %.02136
  %39 = sub nsw i32 %.12335, %37
  %indvars.iv.next43 = add nuw nsw i64 %indvars.iv42, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next43, %wide.trip.count
  br i1 %exitcond.not, label %.critedge, label %29, !llvm.loop !13

.critedge:                                        ; preds = %35, %._crit_edge, %32
  %.sink = phi i32 [ %34, %32 ], [ 0, %._crit_edge ], [ 0, %35 ]
  %40 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %.sink)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  call void @llvm.stackrestore.p0(ptr %13)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret i32 0
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

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 #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #4

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #4

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 = { "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 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { mustprogress nocallback nofree nosync nounwind willreturn }
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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !10, i64 0}
!10 = !{!"omnipotent char", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


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