; LLVM IR from tangjz/acm-icpc :: lydsy (1263)

; 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"

%struct.Big_int = type { i32, [5010 x i32] }

@ans = external dso_local global %struct.Big_int, align 4
@n = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [3 x i8], align 1

; 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 %struct.Big_int, align 4
  %5 = alloca %struct.Big_int, align 4
  store i32 0, ptr %1, align 4
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  store i32 1, ptr %2, align 4, !tbaa !5
  call void @_ZN7Big_int4initERKi(ptr noundef nonnull align 4 dereferenceable(20044) @ans, ptr noundef nonnull align 4 dereferenceable(4) %2)
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  br label %7

7:                                                ; preds = %10, %0
  %8 = load i32, ptr @n, align 4, !tbaa !5
  %9 = icmp sgt i32 %8, 4
  br i1 %9, label %10, label %13

10:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  store i32 3, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 20044, ptr %4) #5
  call void @_ZN7Big_intmLERKi(ptr dead_on_unwind writable sret(%struct.Big_int) align 4 %4, ptr noundef nonnull align 4 dereferenceable(20044) @ans, ptr noundef nonnull align 4 dereferenceable(4) %3)
  call void @llvm.lifetime.end.p0(i64 20044, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  %11 = load i32, ptr @n, align 4, !tbaa !5
  %12 = sub nsw i32 %11, 3
  store i32 %12, ptr @n, align 4, !tbaa !5
  br label %7, !llvm.loop !9

13:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 20044, ptr %5) #5
  call void @_ZN7Big_intmLERKi(ptr dead_on_unwind writable sret(%struct.Big_int) align 4 %5, ptr noundef nonnull align 4 dereferenceable(20044) @ans, ptr noundef nonnull align 4 dereferenceable(4) @n)
  call void @llvm.lifetime.end.p0(i64 20044, ptr %5) #5
  call void @_ZN7Big_int5PrintEv(ptr noundef nonnull align 4 dereferenceable(20044) @ans)
  ret i32 0
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN7Big_int4initERKi(ptr noundef nonnull align 4 dereferenceable(20044), ptr noundef nonnull align 4 dereferenceable(4)) #2 align 2

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

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7Big_intmLERKi(ptr dead_on_unwind noalias writable sret(%struct.Big_int) align 4, ptr noundef nonnull align 4 dereferenceable(20044), ptr noundef nonnull align 4 dereferenceable(4)) #4 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7Big_int5PrintEv(ptr noundef nonnull align 4 dereferenceable(20044)) #4 align 2

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 = { 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"}


; 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"

%struct.Big_int = type { i32, [5010 x i32] }

@ans = external dso_local global %struct.Big_int, align 4
@n = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [3 x i8], align 1

; 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 %struct.Big_int, align 4
  %4 = alloca %struct.Big_int, align 4
  %5 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  store i32 1, ptr %1, align 4, !tbaa !5
  call void @_ZN7Big_int4initERKi(ptr noundef nonnull align 4 dereferenceable(20044) @ans, ptr noundef nonnull align 4 dereferenceable(4) %1)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  %.pr = load i32, ptr @n, align 4, !tbaa !5
  %6 = icmp sgt i32 %.pr, 4
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %.lr.ph
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  store i32 3, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 20044, ptr nonnull %3) #5
  call void @_ZN7Big_intmLERKi(ptr dead_on_unwind nonnull writable sret(%struct.Big_int) align 4 %3, ptr noundef nonnull align 4 dereferenceable(20044) @ans, ptr noundef nonnull align 4 dereferenceable(4) %2)
  call void @llvm.lifetime.end.p0(i64 20044, ptr nonnull %3) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  %7 = load i32, ptr @n, align 4, !tbaa !5
  %8 = add nsw i32 %7, -3
  store i32 %8, ptr @n, align 4, !tbaa !5
  %9 = icmp sgt i32 %7, 7
  br i1 %9, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %0
  call void @llvm.lifetime.start.p0(i64 20044, ptr nonnull %4) #5
  call void @_ZN7Big_intmLERKi(ptr dead_on_unwind nonnull writable sret(%struct.Big_int) align 4 %4, ptr noundef nonnull align 4 dereferenceable(20044) @ans, ptr noundef nonnull align 4 dereferenceable(4) @n)
  call void @llvm.lifetime.end.p0(i64 20044, ptr nonnull %4) #5
  call void @_ZN7Big_int5PrintEv(ptr noundef nonnull align 4 dereferenceable(20044) @ans)
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN7Big_int4initERKi(ptr noundef nonnull align 4 dereferenceable(20044), ptr noundef nonnull align 4 dereferenceable(4)) 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

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7Big_intmLERKi(ptr dead_on_unwind noalias writable sret(%struct.Big_int) align 4, ptr noundef nonnull align 4 dereferenceable(20044), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #4 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7Big_int5PrintEv(ptr noundef nonnull align 4 dereferenceable(20044)) local_unnamed_addr #4 align 2

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 = { 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 #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 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"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass