; LLVM IR from eyangch/competitive-programming :: USACOtraining/3.3/fence.ll (Z8ecircuitiRA500_St8multisetIiSt4lessIiESaIiEERSt6vectorIiS2_E)

; 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.std::_Rb_tree_const_iterator" = type { ptr }
%"class.std::multiset" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<int, int, std::_Identity<int>, std::less<int>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<int, int, std::_Identity<int>, std::less<int>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z8ecircuitiRA500_St8multisetIiSt4lessIiESaIiEERSt6vectorIiS2_E(i32 noundef %0, ptr noundef nonnull align 8 dereferenceable(24000) %1, ptr noundef nonnull align 8 dereferenceable(24) %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %9 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %10 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %11 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %12 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !9
  %13 = load ptr, ptr %5, align 8, !tbaa !9
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [500 x %"class.std::multiset"], ptr %13, i64 0, i64 %15
  %17 = call noundef i64 @_ZNKSt8multisetIiSt4lessIiESaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(48) %16) #3
  %18 = icmp eq i64 %17, 0
  br i1 %18, label %19, label %21

19:                                               ; preds = %3
  %20 = load ptr, ptr %6, align 8, !tbaa !9
  call void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %20, ptr noundef nonnull align 4 dereferenceable(4) %4)
  br label %72

21:                                               ; preds = %3
  br label %22

22:                                               ; preds = %30, %21
  %23 = load ptr, ptr %5, align 8, !tbaa !9
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [500 x %"class.std::multiset"], ptr %23, i64 0, i64 %25
  %27 = call noundef i64 @_ZNKSt8multisetIiSt4lessIiESaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(48) %26) #3
  %28 = trunc i64 %27 to i32
  %29 = icmp sgt i32 %28, 0
  br i1 %29, label %30, label %70

30:                                               ; preds = %22
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %31 = load ptr, ptr %5, align 8, !tbaa !9
  %32 = load i32, ptr %4, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [500 x %"class.std::multiset"], ptr %31, i64 0, i64 %33
  %35 = call ptr @_ZNKSt8multisetIiSt4lessIiESaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %34) #3
  %36 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %8, i32 0, i32 0
  store ptr %35, ptr %36, align 8
  %37 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt23_Rb_tree_const_iteratorIiEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %8) #3
  %38 = load i32, ptr %37, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  store i32 %38, ptr %7, align 4, !tbaa !5
  %39 = load ptr, ptr %5, align 8, !tbaa !9
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds [500 x %"class.std::multiset"], ptr %39, i64 0, i64 %41
  %43 = load ptr, ptr %5, align 8, !tbaa !9
  %44 = load i32, ptr %4, align 4, !tbaa !5
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds [500 x %"class.std::multiset"], ptr %43, i64 0, i64 %45
  %47 = call ptr @_ZNSt8multisetIiSt4lessIiESaIiEE4findERKi(ptr noundef nonnull align 8 dereferenceable(48) %46, ptr noundef nonnull align 4 dereferenceable(4) %7)
  %48 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %9, i32 0, i32 0
  store ptr %47, ptr %48, align 8
  %49 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %9, i32 0, i32 0
  %50 = load ptr, ptr %49, align 8
  %51 = call ptr @_ZNSt8multisetIiSt4lessIiESaIiEE5eraseB5cxx11ESt23_Rb_tree_const_iteratorIiE(ptr noundef nonnull align 8 dereferenceable(48) %42, ptr %50)
  %52 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %10, i32 0, i32 0
  store ptr %51, ptr %52, align 8
  %53 = load ptr, ptr %5, align 8, !tbaa !9
  %54 = load i32, ptr %7, align 4, !tbaa !5
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds [500 x %"class.std::multiset"], ptr %53, i64 0, i64 %55
  %57 = load ptr, ptr %5, align 8, !tbaa !9
  %58 = load i32, ptr %7, align 4, !tbaa !5
  %59 = sext i32 %58 to i64
  %60 = getelementptr inbounds [500 x %"class.std::multiset"], ptr %57, i64 0, i64 %59
  %61 = call ptr @_ZNSt8multisetIiSt4lessIiESaIiEE4findERKi(ptr noundef nonnull align 8 dereferenceable(48) %60, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %62 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %11, i32 0, i32 0
  store ptr %61, ptr %62, align 8
  %63 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %11, i32 0, i32 0
  %64 = load ptr, ptr %63, align 8
  %65 = call ptr @_ZNSt8multisetIiSt4lessIiESaIiEE5eraseB5cxx11ESt23_Rb_tree_const_iteratorIiE(ptr noundef nonnull align 8 dereferenceable(48) %56, ptr %64)
  %66 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %12, i32 0, i32 0
  store ptr %65, ptr %66, align 8
  %67 = load i32, ptr %7, align 4, !tbaa !5
  %68 = load ptr, ptr %5, align 8, !tbaa !9
  %69 = load ptr, ptr %6, align 8, !tbaa !9
  call void @_Z8ecircuitiRA500_St8multisetIiSt4lessIiESaIiEERSt6vectorIiS2_E(i32 noundef %67, ptr noundef nonnull align 8 dereferenceable(24000) %68, ptr noundef nonnull align 8 dereferenceable(24) %69)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %22, !llvm.loop !11

70:                                               ; preds = %22
  %71 = load ptr, ptr %6, align 8, !tbaa !9
  call void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %71, ptr noundef nonnull align 4 dereferenceable(4) %4)
  br label %72

72:                                               ; preds = %70, %19
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt8multisetIiSt4lessIiESaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(48)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt8multisetIiSt4lessIiESaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt23_Rb_tree_const_iteratorIiEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

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

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNSt8multisetIiSt4lessIiESaIiEE5eraseB5cxx11ESt23_Rb_tree_const_iteratorIiE(ptr noundef nonnull align 8 dereferenceable(48), ptr) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNSt8multisetIiSt4lessIiESaIiEE4findERKi(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 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 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 #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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.std::_Rb_tree_const_iterator" = type { ptr }
%"class.std::multiset" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<int, int, std::_Identity<int>, std::less<int>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<int, int, std::_Identity<int>, std::less<int>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local void @_Z8ecircuitiRA500_St8multisetIiSt4lessIiESaIiEERSt6vectorIiS2_E(i32 noundef %0, ptr noundef nonnull align 8 dereferenceable(24000) %1, ptr noundef nonnull align 8 dereferenceable(24) %2) local_unnamed_addr #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  %7 = sext i32 %0 to i64
  %8 = getelementptr inbounds [500 x %"class.std::multiset"], ptr %1, i64 0, i64 %7
  %9 = tail call noundef i64 @_ZNKSt8multisetIiSt4lessIiESaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(48) %8) #3
  %10 = icmp eq i64 %9, 0
  br i1 %10, label %._crit_edge, label %.preheader

.preheader:                                       ; preds = %3
  %11 = tail call noundef i64 @_ZNKSt8multisetIiSt4lessIiESaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(48) %8) #3
  %12 = trunc i64 %11 to i32
  %13 = icmp sgt i32 %12, 0
  br i1 %13, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #3
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [500 x %"class.std::multiset"], ptr %1, i64 0, i64 %15
  %17 = call ptr @_ZNKSt8multisetIiSt4lessIiESaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48) %16) #3
  store ptr %17, ptr %6, align 8
  %18 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt23_Rb_tree_const_iteratorIiEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %6) #3
  %19 = load i32, ptr %18, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #3
  store i32 %19, ptr %5, align 4, !tbaa !5
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [500 x %"class.std::multiset"], ptr %1, i64 0, i64 %21
  %23 = call ptr @_ZNSt8multisetIiSt4lessIiESaIiEE4findERKi(ptr noundef nonnull align 8 dereferenceable(48) %22, ptr noundef nonnull align 4 dereferenceable(4) %5)
  %24 = call ptr @_ZNSt8multisetIiSt4lessIiESaIiEE5eraseB5cxx11ESt23_Rb_tree_const_iteratorIiE(ptr noundef nonnull align 8 dereferenceable(48) %22, ptr %23)
  %25 = load i32, ptr %5, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [500 x %"class.std::multiset"], ptr %1, i64 0, i64 %26
  %28 = call ptr @_ZNSt8multisetIiSt4lessIiESaIiEE4findERKi(ptr noundef nonnull align 8 dereferenceable(48) %27, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %29 = call ptr @_ZNSt8multisetIiSt4lessIiESaIiEE5eraseB5cxx11ESt23_Rb_tree_const_iteratorIiE(ptr noundef nonnull align 8 dereferenceable(48) %27, ptr %28)
  %30 = load i32, ptr %5, align 4, !tbaa !5
  call void @_Z8ecircuitiRA500_St8multisetIiSt4lessIiESaIiEERSt6vectorIiS2_E(i32 noundef %30, ptr noundef nonnull align 8 dereferenceable(24000) %1, ptr noundef nonnull align 8 dereferenceable(24) %2)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #3
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [500 x %"class.std::multiset"], ptr %1, i64 0, i64 %32
  %34 = call noundef i64 @_ZNKSt8multisetIiSt4lessIiESaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(48) %33) #3
  %35 = trunc i64 %34 to i32
  %36 = icmp sgt i32 %35, 0
  br i1 %36, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %.preheader, %3
  call void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 4 dereferenceable(4) %4)
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt8multisetIiSt4lessIiESaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt8multisetIiSt4lessIiESaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt23_Rb_tree_const_iteratorIiEdeEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

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

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNSt8multisetIiSt4lessIiESaIiEE5eraseB5cxx11ESt23_Rb_tree_const_iteratorIiE(ptr noundef nonnull align 8 dereferenceable(48), ptr) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local ptr @_ZNSt8multisetIiSt4lessIiESaIiEE4findERKi(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 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 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 #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass