; LLVM IR from Tunghohin/Competitive_Coding :: Codeforces/cf1707_A.ll (Z5solvev)

; 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" }

@a = external dso_local global [200010 x i32], align 16
@vis = external dso_local global [200010 x i32], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5solvev() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  %7 = 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)
  %8 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %7, ptr noundef nonnull align 4 dereferenceable(4) %2)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 1, ptr %3, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %19, %0
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = load i32, ptr %1, align 4, !tbaa !5
  %12 = icmp sle i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  br label %22

14:                                               ; preds = %9
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [200010 x i32], ptr @a, i64 0, i64 %16
  %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) %17)
  br label %19

19:                                               ; preds = %14
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr %3, align 4, !tbaa !5
  br label %9, !llvm.loop !9

22:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  store i32 0, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  %23 = load i32, ptr %1, align 4, !tbaa !5
  store i32 %23, ptr %5, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %55, %22
  %25 = load i32, ptr %5, align 4, !tbaa !5
  %26 = icmp sge i32 %25, 1
  br i1 %26, label %28, label %27

27:                                               ; preds = %24
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %58

28:                                               ; preds = %24
  %29 = load i32, ptr %5, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds [200010 x i32], ptr @a, i64 0, i64 %30
  %32 = load i32, ptr %31, align 4, !tbaa !5
  %33 = load i32, ptr %4, align 4, !tbaa !5
  %34 = icmp sle i32 %32, %33
  br i1 %34, label %35, label %39

35:                                               ; preds = %28
  %36 = load i32, ptr %5, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds [200010 x i32], ptr @vis, i64 0, i64 %37
  store i32 1, ptr %38, align 4, !tbaa !5
  br label %54

39:                                               ; preds = %28
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = load i32, ptr %2, align 4, !tbaa !5
  %42 = icmp slt i32 %40, %41
  br i1 %42, label %43, label %49

43:                                               ; preds = %39
  %44 = load i32, ptr %4, align 4, !tbaa !5
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %4, align 4, !tbaa !5
  %46 = load i32, ptr %5, align 4, !tbaa !5
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds [200010 x i32], ptr @vis, i64 0, i64 %47
  store i32 1, ptr %48, align 4, !tbaa !5
  br label %53

49:                                               ; preds = %39
  %50 = load i32, ptr %5, align 4, !tbaa !5
  %51 = sext i32 %50 to i64
  %52 = getelementptr inbounds [200010 x i32], ptr @vis, i64 0, i64 %51
  store i32 0, ptr %52, align 4, !tbaa !5
  br label %53

53:                                               ; preds = %49, %43
  br label %54

54:                                               ; preds = %53, %35
  br label %55

55:                                               ; preds = %54
  %56 = load i32, ptr %5, align 4, !tbaa !5
  %57 = add nsw i32 %56, -1
  store i32 %57, ptr %5, align 4, !tbaa !5
  br label %24, !llvm.loop !11

58:                                               ; preds = %27
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %59

59:                                               ; preds = %70, %58
  %60 = load i32, ptr %6, align 4, !tbaa !5
  %61 = load i32, ptr %1, align 4, !tbaa !5
  %62 = icmp sle i32 %60, %61
  br i1 %62, label %64, label %63

63:                                               ; preds = %59
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  br label %73

64:                                               ; preds = %59
  %65 = load i32, ptr %6, align 4, !tbaa !5
  %66 = sext i32 %65 to i64
  %67 = getelementptr inbounds [200010 x i32], ptr @vis, i64 0, i64 %66
  %68 = load i32, ptr %67, align 4, !tbaa !5
  %69 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %68)
  br label %70

70:                                               ; preds = %64
  %71 = load i32, ptr %6, align 4, !tbaa !5
  %72 = add nsw i32 %71, 1
  store i32 %72, ptr %6, align 4, !tbaa !5
  br label %59, !llvm.loop !12

73:                                               ; preds = %63
  %74 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i8 noundef signext 10)
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #4
  ret void
}

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

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

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

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef signext) #3

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 = { "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" }
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"}
!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" }

@a = external dso_local global [200010 x i32], align 16
@vis = external dso_local local_unnamed_addr global [200010 x i32], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5solvev() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #4
  %3 = 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)
  %4 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %3, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %.not22 = icmp slt i32 %5, 1
  br i1 %.not22, label %._crit_edge, label %.lr.ph

.preheader21:                                     ; preds = %.lr.ph
  %6 = icmp sgt i32 %12, 0
  br i1 %6, label %.lr.ph26, label %._crit_edge

.lr.ph26:                                         ; preds = %.preheader21
  %7 = load i32, ptr %2, align 4
  %8 = zext nneg i32 %12 to i64
  %xtraiter = and i64 %8, 1
  %9 = icmp eq i32 %12, 1
  br i1 %9, label %.lr.ph29.preheader.unr-lcssa, label %.lr.ph26.new

.lr.ph26.new:                                     ; preds = %.lr.ph26
  %unroll_iter = and i64 %8, 2147483646
  br label %14

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 1, %0 ]
  %10 = getelementptr inbounds [200010 x i32], ptr @a, i64 0, i64 %indvars.iv
  %11 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %10)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %12 = load i32, ptr %1, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %.not.not = icmp slt i64 %indvars.iv, %13
  br i1 %.not.not, label %.lr.ph, label %.preheader21, !llvm.loop !9

14:                                               ; preds = %14, %.lr.ph26.new
  %indvars.iv32 = phi i64 [ %8, %.lr.ph26.new ], [ %indvars.iv.next33.1, %14 ]
  %.01624 = phi i32 [ 0, %.lr.ph26.new ], [ %.1.1, %14 ]
  %niter = phi i64 [ 0, %.lr.ph26.new ], [ %niter.next.1, %14 ]
  %15 = getelementptr inbounds [200010 x i32], ptr @a, i64 0, i64 %indvars.iv32
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %.not20 = icmp sle i32 %16, %.01624
  %17 = icmp slt i32 %.01624, %7
  %narrow = select i1 %.not20, i1 true, i1 %17
  %.sink = zext i1 %narrow to i32
  %not..not20 = xor i1 %.not20, true
  %narrow41 = select i1 %not..not20, i1 %17, i1 false
  %spec.select40 = zext i1 %narrow41 to i32
  %.1 = add nuw nsw i32 %.01624, %spec.select40
  %18 = getelementptr inbounds [200010 x i32], ptr @vis, i64 0, i64 %indvars.iv32
  store i32 %.sink, ptr %18, align 4, !tbaa !5
  %indvars.iv.next33 = add nsw i64 %indvars.iv32, -1
  %19 = getelementptr inbounds [200010 x i32], ptr @a, i64 0, i64 %indvars.iv.next33
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %.not20.1 = icmp sle i32 %20, %.1
  %21 = icmp slt i32 %.1, %7
  %narrow.1 = select i1 %.not20.1, i1 true, i1 %21
  %.sink.1 = zext i1 %narrow.1 to i32
  %not..not20.1 = xor i1 %.not20.1, true
  %narrow41.1 = select i1 %not..not20.1, i1 %21, i1 false
  %spec.select40.1 = zext i1 %narrow41.1 to i32
  %.1.1 = add nuw nsw i32 %.1, %spec.select40.1
  %22 = getelementptr inbounds [200010 x i32], ptr @vis, i64 0, i64 %indvars.iv.next33
  store i32 %.sink.1, ptr %22, align 4, !tbaa !5
  %indvars.iv.next33.1 = add nsw i64 %indvars.iv32, -2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1.not = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1.not, label %.lr.ph29.preheader.unr-lcssa, label %14, !llvm.loop !11

.lr.ph29.preheader.unr-lcssa:                     ; preds = %14, %.lr.ph26
  %indvars.iv32.unr = phi i64 [ %8, %.lr.ph26 ], [ %indvars.iv.next33.1, %14 ]
  %.01624.unr = phi i32 [ 0, %.lr.ph26 ], [ %.1.1, %14 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph29.preheader, label %.lr.ph29.preheader.epilog-lcssa

.lr.ph29.preheader.epilog-lcssa:                  ; preds = %.lr.ph29.preheader.unr-lcssa
  %23 = getelementptr inbounds [200010 x i32], ptr @a, i64 0, i64 %indvars.iv32.unr
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %.not20.epil = icmp sle i32 %24, %.01624.unr
  %25 = icmp slt i32 %.01624.unr, %7
  %narrow.epil = select i1 %.not20.epil, i1 true, i1 %25
  %.sink.epil = zext i1 %narrow.epil to i32
  %26 = getelementptr inbounds [200010 x i32], ptr @vis, i64 0, i64 %indvars.iv32.unr
  store i32 %.sink.epil, ptr %26, align 4, !tbaa !5
  br label %.lr.ph29.preheader

.lr.ph29.preheader:                               ; preds = %.lr.ph29.preheader.unr-lcssa, %.lr.ph29.preheader.epilog-lcssa
  br label %.lr.ph29

._crit_edge:                                      ; preds = %.lr.ph29, %0, %.preheader21
  %27 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i8 noundef signext 10)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  ret void

.lr.ph29:                                         ; preds = %.lr.ph29.preheader, %.lr.ph29
  %indvars.iv35 = phi i64 [ %indvars.iv.next36, %.lr.ph29 ], [ 1, %.lr.ph29.preheader ]
  %28 = getelementptr inbounds [200010 x i32], ptr @vis, i64 0, i64 %indvars.iv35
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %29)
  %indvars.iv.next36 = add nuw nsw i64 %indvars.iv35, 1
  %31 = load i32, ptr %1, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %.not19.not = icmp slt i64 %indvars.iv35, %32
  br i1 %.not19.not, label %.lr.ph29, label %._crit_edge, !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

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 #2

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

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef signext) local_unnamed_addr #3

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 = { "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" }
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"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


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