; LLVM IR from Izaron/ACM-ICPC :: Russian Council of School Olympiads (R.S.O.Sh.)/IOIP/IOIP 2016 (polygon)

; 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
@ans = external dso_local global [4005 x [4005 x i32]], align 16
@ms = external dso_local global [4005 x i32], align 16
@.str = external hidden unnamed_addr constant [11 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@stdin = external global ptr, align 8
@.str.2 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1
@stdout = external global ptr, align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z2dpii(i32 noundef, i32 noundef) #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #1 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %5 = load ptr, ptr @stdin, align 8, !tbaa !5
  %6 = call ptr @freopen(ptr noundef @.str, ptr noundef @.str.1, ptr noundef %5)
  %7 = load ptr, ptr @stdout, align 8, !tbaa !5
  %8 = call ptr @freopen(ptr noundef @.str.2, ptr noundef @.str.3, ptr noundef %7)
  %9 = 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)
  call void @llvm.memset.p0.i64(ptr align 16 @ans, i8 -1, i64 64160100, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #6
  store i32 0, ptr %2, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %20, %0
  %11 = load i32, ptr %2, align 4, !tbaa !9
  %12 = load i32, ptr @n, align 4, !tbaa !9
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #6
  br label %23

15:                                               ; preds = %10
  %16 = load i32, ptr %2, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [4005 x i32], ptr @ms, i64 0, i64 %17
  %19 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %18)
  br label %20

20:                                               ; preds = %15
  %21 = load i32, ptr %2, align 4, !tbaa !9
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %2, align 4, !tbaa !9
  br label %10, !llvm.loop !11

23:                                               ; preds = %14
  %24 = load i32, ptr @n, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds i32, ptr @ms, i64 %25
  call void @_ZSt4sortIPiEvT_S1_(ptr noundef @ms, ptr noundef %26)
  %27 = load i32, ptr @n, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds i32, ptr @ms, i64 %28
  call void @_ZSt7reverseIPiEvT_S1_(ptr noundef @ms, ptr noundef %29)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #6
  store i32 0, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #6
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %30

30:                                               ; preds = %47, %23
  %31 = load i32, ptr %4, align 4, !tbaa !9
  %32 = load i32, ptr @n, align 4, !tbaa !9
  %33 = icmp slt i32 %31, %32
  br i1 %33, label %35, label %34

34:                                               ; preds = %30
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #6
  br label %50

35:                                               ; preds = %30
  %36 = load i32, ptr %4, align 4, !tbaa !9
  %37 = add nsw i32 %36, 1
  %38 = load i32, ptr %4, align 4, !tbaa !9
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [4005 x i32], ptr @ms, i64 0, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !9
  %42 = call noundef i32 @_Z2dpii(i32 noundef %37, i32 noundef %41)
  %43 = load i32, ptr %3, align 4, !tbaa !9
  %44 = add nsw i32 %43, %42
  store i32 %44, ptr %3, align 4, !tbaa !9
  %45 = load i32, ptr %3, align 4, !tbaa !9
  %46 = srem i32 %45, 1000000007
  store i32 %46, ptr %3, align 4, !tbaa !9
  br label %47

47:                                               ; preds = %35
  %48 = load i32, ptr %4, align 4, !tbaa !9
  %49 = add nsw i32 %48, 1
  store i32 %49, ptr %4, align 4, !tbaa !9
  br label %30, !llvm.loop !13

50:                                               ; preds = %34
  %51 = load i32, ptr %3, align 4, !tbaa !9
  %52 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %51)
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #6
  %53 = load i32, ptr %1, align 4
  ret i32 %53
}

declare ptr @freopen(ptr noundef, ptr noundef, ptr noundef) #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

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #4

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIPiEvT_S1_(ptr noundef, ptr noundef) #5

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt7reverseIPiEvT_S1_(ptr noundef, ptr noundef) #5

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #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 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 #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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #5 = { 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 #6 = { 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"}
!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" }

@n = external dso_local global i32, align 4
@ans = external dso_local local_unnamed_addr global [4005 x [4005 x i32]], align 16
@ms = external dso_local global [4005 x i32], align 16
@.str = external hidden unnamed_addr constant [11 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@stdin = external local_unnamed_addr global ptr, align 8
@.str.2 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1
@stdout = external local_unnamed_addr global ptr, align 8
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z2dpii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #1 {
  %1 = load ptr, ptr @stdin, align 8, !tbaa !5
  %2 = tail call ptr @freopen(ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, ptr noundef %1)
  %3 = load ptr, ptr @stdout, align 8, !tbaa !5
  %4 = tail call ptr @freopen(ptr noundef nonnull @.str.2, ptr noundef nonnull @.str.3, ptr noundef %3)
  %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) @n)
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(64160100) @ans, i8 -1, i64 64160100, i1 false)
  %6 = load i32, ptr @n, align 4, !tbaa !9
  %7 = icmp sgt i32 %6, 0
  br i1 %7, label %.lr.ph, label %.._crit_edge_crit_edge

.._crit_edge_crit_edge:                           ; preds = %0
  %.pre = sext i32 %6 to i64
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %.._crit_edge_crit_edge
  %.pre-phi = phi i64 [ %.pre, %.._crit_edge_crit_edge ], [ %17, %.lr.ph ]
  %8 = getelementptr inbounds i32, ptr @ms, i64 %.pre-phi
  tail call void @_ZSt4sortIPiEvT_S1_(ptr noundef nonnull @ms, ptr noundef nonnull %8)
  %9 = load i32, ptr @n, align 4, !tbaa !9
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds i32, ptr @ms, i64 %10
  tail call void @_ZSt7reverseIPiEvT_S1_(ptr noundef nonnull @ms, ptr noundef nonnull %11)
  %12 = load i32, ptr @n, align 4, !tbaa !9
  %13 = icmp sgt i32 %12, 0
  br i1 %13, label %.lr.ph18, label %._crit_edge19

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %14 = getelementptr inbounds [4005 x i32], ptr @ms, i64 0, i64 %indvars.iv
  %15 = 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) %14)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %16 = load i32, ptr @n, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = icmp slt i64 %indvars.iv.next, %17
  br i1 %18, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge19:                                    ; preds = %.lr.ph18, %._crit_edge
  %.011.lcssa = phi i32 [ 0, %._crit_edge ], [ %25, %.lr.ph18 ]
  %19 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %.011.lcssa)
  ret i32 0

.lr.ph18:                                         ; preds = %._crit_edge, %.lr.ph18
  %indvars.iv24 = phi i64 [ %indvars.iv.next25, %.lr.ph18 ], [ 0, %._crit_edge ]
  %.01115 = phi i32 [ %25, %.lr.ph18 ], [ 0, %._crit_edge ]
  %indvars.iv.next25 = add nuw nsw i64 %indvars.iv24, 1
  %20 = getelementptr inbounds [4005 x i32], ptr @ms, i64 0, i64 %indvars.iv24
  %21 = load i32, ptr %20, align 4, !tbaa !9
  %22 = trunc nuw nsw i64 %indvars.iv.next25 to i32
  %23 = tail call noundef i32 @_Z2dpii(i32 noundef %22, i32 noundef %21)
  %24 = add nsw i32 %23, %.01115
  %25 = srem i32 %24, 1000000007
  %26 = load i32, ptr @n, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = icmp slt i64 %indvars.iv.next25, %27
  br i1 %28, label %.lr.ph18, label %._crit_edge19, !llvm.loop !13
}

declare ptr @freopen(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #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 #2

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIPiEvT_S1_(ptr noundef, ptr noundef) local_unnamed_addr #4

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt7reverseIPiEvT_S1_(ptr noundef, 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 #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 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 #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 nocallback nofree nounwind willreturn memory(argmem: write) }
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" }

!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"}
!13 = distinct !{!13, !12}


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