; LLVM IR from tangjz/acm-icpc :: hdu (5350)

; 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::priority_queue" = type <{ %"class.std::vector", [8 x i8] }>
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@t = external dso_local global i32, align 4
@n = external dso_local global i32, align 4
@ans = external dso_local global i64, align 8
@Q = external dso_local global %"class.std::priority_queue", align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 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 i32, align 4
  store i32 0, ptr %1, align 4
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @t)
  br label %6

6:                                                ; preds = %44, %0
  %7 = load i32, ptr @t, align 4, !tbaa !5
  %8 = add nsw i32 %7, -1
  store i32 %8, ptr @t, align 4, !tbaa !5
  %9 = icmp ne i32 %7, 0
  br i1 %9, label %10, label %47

10:                                               ; preds = %6
  store i64 0, ptr @ans, align 8, !tbaa !9
  br label %11

11:                                               ; preds = %14, %10
  %12 = call noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  %13 = xor i1 %12, true
  br i1 %13, label %14, label %15

14:                                               ; preds = %11
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  br label %11, !llvm.loop !11

15:                                               ; preds = %11
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n)
  br label %17

17:                                               ; preds = %21, %15
  %18 = load i32, ptr @n, align 4, !tbaa !5
  %19 = add nsw i32 %18, -1
  store i32 %19, ptr @n, align 4, !tbaa !5
  %20 = icmp ne i32 %18, 0
  br i1 %20, label %21, label %23

21:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  %22 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25) @Q, ptr noundef nonnull align 4 dereferenceable(4) %2)
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  br label %17, !llvm.loop !13

23:                                               ; preds = %17
  br label %24

24:                                               ; preds = %43, %23
  %25 = call noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  %26 = xor i1 %25, true
  br i1 %26, label %27, label %44

27:                                               ; preds = %24
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  %28 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  %29 = load i32, ptr %28, align 4, !tbaa !5
  store i32 %29, ptr %3, align 4, !tbaa !5
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  %30 = call noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  br i1 %30, label %31, label %32

31:                                               ; preds = %27
  store i32 9, ptr %4, align 4
  br label %41

32:                                               ; preds = %27
  %33 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  %34 = load i32, ptr %33, align 4, !tbaa !5
  %35 = load i32, ptr %3, align 4, !tbaa !5
  %36 = add nsw i32 %35, %34
  store i32 %36, ptr %3, align 4, !tbaa !5
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  %37 = load i32, ptr %3, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = load i64, ptr @ans, align 8, !tbaa !9
  %40 = add nsw i64 %39, %38
  store i64 %40, ptr @ans, align 8, !tbaa !9
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25) @Q, ptr noundef nonnull align 4 dereferenceable(4) %3)
  store i32 0, ptr %4, align 4
  br label %41

41:                                               ; preds = %32, %31
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  %42 = load i32, ptr %4, align 4
  switch i32 %42, label %48 [
    i32 0, label %43
    i32 9, label %44
  ]

43:                                               ; preds = %41
  br label %24, !llvm.loop !14

44:                                               ; preds = %41, %24
  %45 = load i64, ptr @ans, align 8, !tbaa !9
  %46 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %45)
  br label %6, !llvm.loop !15

47:                                               ; preds = %6
  ret i32 0

48:                                               ; preds = %41
  unreachable
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25)) #3 align 2

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25), ptr noundef nonnull align 4 dereferenceable(4)) #3 align 2

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25)) #2 align 2

declare i32 @printf(ptr 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 = { 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 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}
!14 = distinct !{!14, !12}
!15 = distinct !{!15, !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::priority_queue" = type <{ %"class.std::vector", [8 x i8] }>
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@t = external dso_local global i32, align 4
@n = external dso_local global i32, align 4
@ans = external dso_local local_unnamed_addr global i64, align 8
@Q = external dso_local global %"class.std::priority_queue", align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 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 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @t)
  %4 = load i32, ptr @t, align 4, !tbaa !5
  %5 = add nsw i32 %4, -1
  store i32 %5, ptr @t, align 4, !tbaa !5
  %.not8 = icmp eq i32 %4, 0
  br i1 %.not8, label %._crit_edge11, label %.lr.ph10

.lr.ph10:                                         ; preds = %0, %.loopexit
  store i64 0, ptr @ans, align 8, !tbaa !9
  %6 = call noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  br i1 %6, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph10, %.lr.ph
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  %7 = call noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  br i1 %7, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph10
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n)
  %9 = load i32, ptr @n, align 4, !tbaa !5
  %10 = add nsw i32 %9, -1
  store i32 %10, ptr @n, align 4, !tbaa !5
  %.not14 = icmp eq i32 %9, 0
  br i1 %.not14, label %.preheader, label %.lr.ph6

.preheader:                                       ; preds = %.lr.ph6, %._crit_edge
  %11 = call noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  br i1 %11, label %.loopexit, label %.lr.ph7

.lr.ph6:                                          ; preds = %._crit_edge, %.lr.ph6
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25) @Q, ptr noundef nonnull align 4 dereferenceable(4) %1)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  %13 = load i32, ptr @n, align 4, !tbaa !5
  %14 = add nsw i32 %13, -1
  store i32 %14, ptr @n, align 4, !tbaa !5
  %.not1 = icmp eq i32 %13, 0
  br i1 %.not1, label %.preheader, label %.lr.ph6, !llvm.loop !13

.lr.ph7:                                          ; preds = %.preheader, %18
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  %15 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  %16 = load i32, ptr %15, align 4, !tbaa !5
  store i32 %16, ptr %2, align 4, !tbaa !5
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  %17 = call noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  br i1 %17, label %.thread, label %18

.thread:                                          ; preds = %.lr.ph7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  br label %.loopexit

18:                                               ; preds = %.lr.ph7
  %19 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = add nsw i32 %21, %20
  store i32 %22, ptr %2, align 4, !tbaa !5
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  %23 = load i32, ptr %2, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = load i64, ptr @ans, align 8, !tbaa !9
  %26 = add nsw i64 %25, %24
  store i64 %26, ptr @ans, align 8, !tbaa !9
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25) @Q, ptr noundef nonnull align 4 dereferenceable(4) %2)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  %27 = call noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25) @Q)
  br i1 %27, label %.loopexit, label %.lr.ph7

.loopexit:                                        ; preds = %18, %.preheader, %.thread
  %28 = load i64, ptr @ans, align 8, !tbaa !9
  %29 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %28)
  %30 = load i32, ptr @t, align 4, !tbaa !5
  %31 = add nsw i32 %30, -1
  store i32 %31, ptr @t, align 4, !tbaa !5
  %.not = icmp eq i32 %30, 0
  br i1 %.not, label %._crit_edge11, label %.lr.ph10, !llvm.loop !14

._crit_edge11:                                    ; preds = %.loopexit, %0
  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 noundef zeroext i1 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE5emptyEv(ptr noundef nonnull align 8 dereferenceable(25)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25)) local_unnamed_addr #3 align 2

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #3 align 2

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25)) local_unnamed_addr #2 align 2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) 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 = { 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 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}
!14 = distinct !{!14, !12}


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