; LLVM IR from Tunghohin/Competitive_Coding :: Luogu (p1048)

; 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
@m = external dso_local global i32, align 4
@t = external dso_local global [1010 x i32], align 16
@v = external dso_local global [1010 x i32], align 16
@dp = external dso_local global [1010 x i32], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@_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 i32, align 4
  %6 = alloca i32, align 4
  store i32 0, ptr %1, align 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) @n)
  %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) @m)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 1, ptr %2, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %22, %0
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = load i32, ptr @m, 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 %2) #4
  br label %25

14:                                               ; preds = %9
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [1010 x i32], ptr @t, i64 0, i64 %16
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [1010 x i32], ptr @v, i64 0, i64 %19
  %21 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %17, ptr noundef %20)
  br label %22

22:                                               ; preds = %14
  %23 = load i32, ptr %2, align 4, !tbaa !5
  %24 = add nsw i32 %23, 1
  store i32 %24, ptr %2, align 4, !tbaa !5
  br label %9, !llvm.loop !9

25:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 1, ptr %3, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %68, %25
  %27 = load i32, ptr %3, align 4, !tbaa !5
  %28 = load i32, ptr @m, align 4, !tbaa !5
  %29 = icmp sle i32 %27, %28
  br i1 %29, label %31, label %30

30:                                               ; preds = %26
  store i32 5, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  br label %71

31:                                               ; preds = %26
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  %32 = load i32, ptr @n, align 4, !tbaa !5
  store i32 %32, ptr %5, align 4, !tbaa !5
  br label %33

33:                                               ; preds = %64, %31
  %34 = load i32, ptr %5, align 4, !tbaa !5
  %35 = load i32, ptr %3, align 4, !tbaa !5
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds [1010 x i32], ptr @v, i64 0, i64 %36
  %38 = load i32, ptr %37, align 4, !tbaa !5
  %39 = icmp sge i32 %34, %38
  br i1 %39, label %41, label %40

40:                                               ; preds = %33
  store i32 8, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %67

41:                                               ; preds = %33
  %42 = load i32, ptr %5, align 4, !tbaa !5
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [1010 x i32], ptr @dp, i64 0, i64 %43
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  %45 = load i32, ptr %5, align 4, !tbaa !5
  %46 = load i32, ptr %3, align 4, !tbaa !5
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds [1010 x i32], ptr @t, i64 0, i64 %47
  %49 = load i32, ptr %48, align 4, !tbaa !5
  %50 = sub nsw i32 %45, %49
  %51 = sext i32 %50 to i64
  %52 = getelementptr inbounds [1010 x i32], ptr @dp, i64 0, i64 %51
  %53 = load i32, ptr %52, align 4, !tbaa !5
  %54 = load i32, ptr %3, align 4, !tbaa !5
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds [1010 x i32], ptr @v, i64 0, i64 %55
  %57 = load i32, ptr %56, align 4, !tbaa !5
  %58 = add nsw i32 %53, %57
  store i32 %58, ptr %6, align 4, !tbaa !5
  %59 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %44, ptr noundef nonnull align 4 dereferenceable(4) %6)
  %60 = load i32, ptr %59, align 4, !tbaa !5
  %61 = load i32, ptr %5, align 4, !tbaa !5
  %62 = sext i32 %61 to i64
  %63 = getelementptr inbounds [1010 x i32], ptr @dp, i64 0, i64 %62
  store i32 %60, ptr %63, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  br label %64

64:                                               ; preds = %41
  %65 = load i32, ptr %5, align 4, !tbaa !5
  %66 = add nsw i32 %65, -1
  store i32 %66, ptr %5, align 4, !tbaa !5
  br label %33, !llvm.loop !11

67:                                               ; preds = %40
  br label %68

68:                                               ; preds = %67
  %69 = load i32, ptr %3, align 4, !tbaa !5
  %70 = add nsw i32 %69, 1
  store i32 %70, ptr %3, align 4, !tbaa !5
  br label %26, !llvm.loop !12

71:                                               ; preds = %30
  %72 = load i32, ptr @m, align 4, !tbaa !5
  %73 = sext i32 %72 to i64
  %74 = getelementptr inbounds [1010 x i32], ptr @dp, i64 0, i64 %73
  %75 = load i32, ptr %74, align 4, !tbaa !5
  %76 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %75)
  ret i32 0
}

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 memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

declare i32 @__isoc99_scanf(ptr noundef, ...) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #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 = { "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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { inlinehint 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 #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" }

@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@t = external dso_local global [1010 x i32], align 16
@v = external dso_local global [1010 x i32], align 16
@dp = external dso_local global [1010 x i32], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@_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 = 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 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %2, ptr noundef nonnull align 4 dereferenceable(4) @m)
  %4 = load i32, ptr @m, align 4, !tbaa !5
  %.not19 = icmp slt i32 %4, 1
  br i1 %.not19, label %.preheader.._crit_edge27_crit_edge, label %.lr.ph

.preheader:                                       ; preds = %.lr.ph
  %.not1724 = icmp slt i32 %9, 1
  br i1 %.not1724, label %.preheader.._crit_edge27_crit_edge, label %.lr.ph26

.preheader.._crit_edge27_crit_edge:               ; preds = %0, %.preheader
  %5 = phi i32 [ %9, %.preheader ], [ %4, %0 ]
  %.pre36 = sext i32 %5 to i64
  br label %._crit_edge27

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 1, %0 ]
  %6 = getelementptr inbounds [1010 x i32], ptr @t, i64 0, i64 %indvars.iv
  %7 = getelementptr inbounds [1010 x i32], ptr @v, i64 0, i64 %indvars.iv
  %8 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %6, ptr noundef nonnull %7)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %9 = load i32, ptr @m, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %.not.not = icmp slt i64 %indvars.iv, %10
  br i1 %.not.not, label %.lr.ph, label %.preheader, !llvm.loop !9

._crit_edge27:                                    ; preds = %._crit_edge, %.preheader.._crit_edge27_crit_edge
  %.pre-phi = phi i64 [ %.pre36, %.preheader.._crit_edge27_crit_edge ], [ %21, %._crit_edge ]
  %11 = getelementptr inbounds [1010 x i32], ptr @dp, i64 0, i64 %.pre-phi
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %12)
  ret i32 0

.lr.ph26:                                         ; preds = %.preheader, %._crit_edge
  %14 = phi i32 [ %20, %._crit_edge ], [ %9, %.preheader ]
  %indvars.iv33 = phi i64 [ %indvars.iv.next34, %._crit_edge ], [ 1, %.preheader ]
  %15 = load i32, ptr @n, align 4, !tbaa !5
  %16 = getelementptr inbounds [1010 x i32], ptr @v, i64 0, i64 %indvars.iv33
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %.not1821 = icmp slt i32 %15, %17
  br i1 %.not1821, label %._crit_edge, label %.lr.ph23

.lr.ph23:                                         ; preds = %.lr.ph26
  %18 = getelementptr inbounds [1010 x i32], ptr @t, i64 0, i64 %indvars.iv33
  %19 = sext i32 %15 to i64
  br label %22

._crit_edge.loopexit:                             ; preds = %22
  %.pre = load i32, ptr @m, align 4, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %.lr.ph26
  %20 = phi i32 [ %.pre, %._crit_edge.loopexit ], [ %14, %.lr.ph26 ]
  %indvars.iv.next34 = add nuw nsw i64 %indvars.iv33, 1
  %21 = sext i32 %20 to i64
  %.not17.not = icmp slt i64 %indvars.iv33, %21
  br i1 %.not17.not, label %.lr.ph26, label %._crit_edge27, !llvm.loop !11

22:                                               ; preds = %.lr.ph23, %22
  %indvars.iv30 = phi i64 [ %19, %.lr.ph23 ], [ %indvars.iv.next31, %22 ]
  %23 = phi i32 [ %17, %.lr.ph23 ], [ %33, %22 ]
  %24 = getelementptr inbounds [1010 x i32], ptr @dp, i64 0, i64 %indvars.iv30
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  %25 = load i32, ptr %18, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = sub nsw i64 %indvars.iv30, %26
  %28 = getelementptr inbounds [1010 x i32], ptr @dp, i64 0, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = add nsw i32 %29, %23
  store i32 %30, ptr %1, align 4, !tbaa !5
  %31 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %24, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %32 = load i32, ptr %31, align 4, !tbaa !5
  store i32 %32, ptr %24, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  %indvars.iv.next31 = add nsw i64 %indvars.iv30, -1
  %33 = load i32, ptr %16, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %.not18.not = icmp sgt i64 %indvars.iv30, %34
  br i1 %.not18.not, label %22, label %._crit_edge.loopexit, !llvm.loop !12
}

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 memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) 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 #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 = { "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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { nofree nounwind "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 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 #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,CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass