; LLVM IR from tangjz/acm-icpc :: codeforces (278A)

; 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" }

@n = external dso_local global i32, align 4
@s = external dso_local global i32, align 4
@t = external dso_local global i32, align 4
@line = external dso_local global [101 x i32], align 16
@ans = external dso_local global i32, align 4
@tmp = external dso_local global i32, align 4
@_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
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  %3 = call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %4 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @n)
  store i32 1, ptr %2, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %14, %0
  %6 = load i32, ptr %2, align 4, !tbaa !5
  %7 = load i32, ptr @n, align 4, !tbaa !5
  %8 = icmp sle i32 %6, %7
  br i1 %8, label %9, label %17

9:                                                ; preds = %5
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [101 x i32], ptr @line, i64 0, i64 %11
  %13 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %12)
  br label %14

14:                                               ; preds = %9
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = add nsw i32 %15, 1
  store i32 %16, ptr %2, align 4, !tbaa !5
  br label %5, !llvm.loop !9

17:                                               ; preds = %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) @s)
  %19 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %18, ptr noundef nonnull align 4 dereferenceable(4) @t)
  %20 = load i32, ptr @s, align 4, !tbaa !5
  store i32 %20, ptr %2, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %38, %17
  %22 = load i32, ptr %2, align 4, !tbaa !5
  %23 = load i32, ptr @t, align 4, !tbaa !5
  %24 = icmp ne i32 %22, %23
  br i1 %24, label %25, label %39

25:                                               ; preds = %21
  %26 = load i32, ptr %2, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [101 x i32], ptr @line, i64 0, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = load i32, ptr @tmp, align 4, !tbaa !5
  %31 = add nsw i32 %30, %29
  store i32 %31, ptr @tmp, align 4, !tbaa !5
  %32 = load i32, ptr %2, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %2, align 4, !tbaa !5
  %34 = load i32, ptr %2, align 4, !tbaa !5
  %35 = load i32, ptr @n, align 4, !tbaa !5
  %36 = icmp sgt i32 %34, %35
  br i1 %36, label %37, label %38

37:                                               ; preds = %25
  store i32 1, ptr %2, align 4, !tbaa !5
  br label %38

38:                                               ; preds = %37, %25
  br label %21, !llvm.loop !11

39:                                               ; preds = %21
  br label %40

40:                                               ; preds = %57, %39
  %41 = load i32, ptr %2, align 4, !tbaa !5
  %42 = load i32, ptr @s, align 4, !tbaa !5
  %43 = icmp ne i32 %41, %42
  br i1 %43, label %44, label %58

44:                                               ; preds = %40
  %45 = load i32, ptr %2, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds [101 x i32], ptr @line, i64 0, i64 %46
  %48 = load i32, ptr %47, align 4, !tbaa !5
  %49 = load i32, ptr @ans, align 4, !tbaa !5
  %50 = add nsw i32 %49, %48
  store i32 %50, ptr @ans, align 4, !tbaa !5
  %51 = load i32, ptr %2, align 4, !tbaa !5
  %52 = add nsw i32 %51, 1
  store i32 %52, ptr %2, align 4, !tbaa !5
  %53 = load i32, ptr %2, align 4, !tbaa !5
  %54 = load i32, ptr @n, align 4, !tbaa !5
  %55 = icmp sgt i32 %53, %54
  br i1 %55, label %56, label %57

56:                                               ; preds = %44
  store i32 1, ptr %2, align 4, !tbaa !5
  br label %57

57:                                               ; preds = %56, %44
  br label %40, !llvm.loop !12

58:                                               ; preds = %40
  %59 = load i32, ptr @tmp, align 4, !tbaa !5
  %60 = load i32, ptr @ans, align 4, !tbaa !5
  %61 = icmp slt i32 %59, %60
  br i1 %61, label %62, label %64

62:                                               ; preds = %58
  %63 = load i32, ptr @tmp, align 4, !tbaa !5
  store i32 %63, ptr @ans, align 4, !tbaa !5
  br label %64

64:                                               ; preds = %62, %58
  %65 = load i32, ptr @ans, align 4, !tbaa !5
  %66 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %65)
  %67 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %66, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  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

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) #2

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #2

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #3 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)) #4

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

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 = { "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 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 = { 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" }

@n = external dso_local global i32, align 4
@s = external dso_local global i32, align 4
@t = external dso_local global i32, align 4
@line = external dso_local global [101 x i32], align 16
@ans = external dso_local local_unnamed_addr global i32, align 4
@tmp = external dso_local local_unnamed_addr global i32, align 4
@_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 = tail call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %2 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @n)
  %3 = load i32, ptr @n, align 4, !tbaa !5
  %.not17 = icmp slt i32 %3, 1
  br i1 %.not17, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 1, %0 ]
  %4 = getelementptr inbounds [101 x i32], ptr @line, i64 0, i64 %indvars.iv
  %5 = tail 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)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %6 = load i32, ptr @n, align 4, !tbaa !5
  %7 = sext i32 %6 to i64
  %.not.not = icmp slt i64 %indvars.iv, %7
  br i1 %.not.not, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %0
  %8 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @s)
  %9 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %8, ptr noundef nonnull align 4 dereferenceable(4) @t)
  %10 = load i32, ptr @s, align 4, !tbaa !5
  %11 = load i32, ptr @t, align 4, !tbaa !5
  %.not1319 = icmp eq i32 %10, %11
  br i1 %.not1319, label %.preheader._crit_edge, label %.lr.ph22

.lr.ph22:                                         ; preds = %._crit_edge
  %tmp.promoted = load i32, ptr @tmp, align 4, !tbaa !5
  %12 = load i32, ptr @n, align 4, !tbaa !5
  br label %14

.preheader:                                       ; preds = %14
  store i32 %19, ptr @tmp, align 4, !tbaa !5
  %.not1423 = icmp eq i32 %11, %10
  br i1 %.not1423, label %.preheader._crit_edge, label %.lr.ph25

.preheader._crit_edge:                            ; preds = %._crit_edge, %.preheader
  %.pre = load i32, ptr @ans, align 4, !tbaa !5
  br label %28

.lr.ph25:                                         ; preds = %.preheader
  %ans.promoted = load i32, ptr @ans, align 4, !tbaa !5
  %13 = load i32, ptr @n, align 4, !tbaa !5
  br label %21

14:                                               ; preds = %.lr.ph22, %14
  %.120 = phi i32 [ %10, %.lr.ph22 ], [ %spec.store.select, %14 ]
  %15 = phi i32 [ %tmp.promoted, %.lr.ph22 ], [ %19, %14 ]
  %16 = sext i32 %.120 to i64
  %17 = getelementptr inbounds [101 x i32], ptr @line, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = add nsw i32 %15, %18
  %20 = add nsw i32 %.120, 1
  %.not16 = icmp slt i32 %.120, %12
  %spec.store.select = select i1 %.not16, i32 %20, i32 1
  %.not13 = icmp eq i32 %spec.store.select, %11
  br i1 %.not13, label %.preheader, label %14, !llvm.loop !11

21:                                               ; preds = %.lr.ph25, %21
  %.224 = phi i32 [ %11, %.lr.ph25 ], [ %spec.store.select1, %21 ]
  %22 = phi i32 [ %ans.promoted, %.lr.ph25 ], [ %26, %21 ]
  %23 = sext i32 %.224 to i64
  %24 = getelementptr inbounds [101 x i32], ptr @line, i64 0, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = add nsw i32 %22, %25
  %27 = add nsw i32 %.224, 1
  %.not15 = icmp slt i32 %.224, %13
  %spec.store.select1 = select i1 %.not15, i32 %27, i32 1
  %.not14 = icmp eq i32 %spec.store.select1, %10
  br i1 %.not14, label %._crit_edge26, label %21, !llvm.loop !12

._crit_edge26:                                    ; preds = %21
  store i32 %26, ptr @ans, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %.preheader._crit_edge, %._crit_edge26
  %29 = phi i32 [ %.pre, %.preheader._crit_edge ], [ %26, %._crit_edge26 ]
  %30 = load i32, ptr @tmp, align 4, !tbaa !5
  %31 = icmp slt i32 %30, %29
  br i1 %31, label %32, label %33

32:                                               ; preds = %28
  store i32 %30, ptr @ans, align 4, !tbaa !5
  br label %33

33:                                               ; preds = %32, %28
  %34 = phi i32 [ %30, %32 ], [ %29, %28 ]
  %35 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %34)
  %36 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %35, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  ret i32 0
}

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

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

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 uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #2 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)) #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 = { "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 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 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" }

!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: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass