; LLVM IR from anaeim/apriori :: main.ll (Z13subset_finderRSt3setIiSt4lessIiESaIiEEiiSt23_Rb_tree_const_iteratorIiER2lkS4_)

; 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 }
%"struct.std::pair" = type <{ %"struct.std::_Rb_tree_const_iterator", i8, [7 x i8] }>
%struct.lk = type <{ %"class.std::map", i32, [4 x i8] }>
%"class.std::map" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<std::set<int>, std::pair<const std::set<int>, int>, std::_Select1st<std::pair<const std::set<int>, int>>, std::less<std::set<int>>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<std::set<int>, std::pair<const std::set<int>, int>, std::_Select1st<std::pair<const std::set<int>, int>>, std::less<std::set<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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt3setIiSt4lessIiESaIiEE6insertERKi(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNKSt3mapISt3setIiSt4lessIiESaIiEEiS1_IS4_ESaISt4pairIKS4_iEEE5countERS7_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(48)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapISt3setIiSt4lessIiESaIiEEiS1_IS4_ESaISt4pairIKS4_iEEEixERS7_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(48)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNSt3setIiSt4lessIiESaIiEE5eraseERKi(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3setIiSt4lessIiESaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorIiES2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #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)) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z13subset_finderRSt3setIiSt4lessIiESaIiEEiiSt23_Rb_tree_const_iteratorIiER2lkS4_(ptr noundef nonnull align 8 dereferenceable(48) %0, i32 noundef %1, i32 noundef %2, ptr %3, ptr noundef nonnull align 8 dereferenceable(52) %4, ptr noundef nonnull align 8 dereferenceable(48) %5) #1 {
  %7 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca ptr, align 8
  %12 = alloca ptr, align 8
  %13 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %14 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %15 = alloca %"struct.std::pair", align 8
  %16 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %17 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %7, i32 0, i32 0
  store ptr %3, ptr %17, align 8
  store ptr %0, ptr %8, align 8, !tbaa !5
  store i32 %1, ptr %9, align 4, !tbaa !9
  store i32 %2, ptr %10, align 4, !tbaa !9
  store ptr %4, ptr %11, align 8, !tbaa !5
  store ptr %5, ptr %12, align 8, !tbaa !5
  %18 = load i32, ptr %10, align 4, !tbaa !9
  %19 = icmp eq i32 %18, 0
  br i1 %19, label %20, label %34

20:                                               ; preds = %6
  %21 = load ptr, ptr %11, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.lk, ptr %21, i32 0, i32 0
  %23 = load ptr, ptr %12, align 8, !tbaa !5
  %24 = call noundef i64 @_ZNKSt3mapISt3setIiSt4lessIiESaIiEEiS1_IS4_ESaISt4pairIKS4_iEEE5countERS7_(ptr noundef nonnull align 8 dereferenceable(48) %22, ptr noundef nonnull align 8 dereferenceable(48) %23)
  %25 = icmp ugt i64 %24, 0
  br i1 %25, label %26, label %33

26:                                               ; preds = %20
  %27 = load ptr, ptr %11, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.lk, ptr %27, i32 0, i32 0
  %29 = load ptr, ptr %12, align 8, !tbaa !5
  %30 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapISt3setIiSt4lessIiESaIiEEiS1_IS4_ESaISt4pairIKS4_iEEEixERS7_(ptr noundef nonnull align 8 dereferenceable(48) %28, ptr noundef nonnull align 8 dereferenceable(48) %29)
  %31 = load i32, ptr %30, align 4, !tbaa !9
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %30, align 4, !tbaa !9
  br label %33

33:                                               ; preds = %26, %20
  br label %64

34:                                               ; preds = %6
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %13, ptr align 8 %7, i64 8, i1 false), !tbaa.struct !11
  br label %35

35:                                               ; preds = %61, %34
  call void @llvm.lifetime.start.p0(i64 8, ptr %14) #4
  %36 = load ptr, ptr %8, align 8, !tbaa !5
  %37 = call ptr @_ZNKSt3setIiSt4lessIiESaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %36) #4
  %38 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %14, i32 0, i32 0
  store ptr %37, ptr %38, align 8
  %39 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorIiES2_(ptr noundef nonnull align 8 dereferenceable(8) %13, ptr noundef nonnull align 8 dereferenceable(8) %14) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %14) #4
  br i1 %39, label %41, label %40

40:                                               ; preds = %35
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #4
  br label %63

41:                                               ; preds = %35
  %42 = load ptr, ptr %12, align 8, !tbaa !5
  %43 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt23_Rb_tree_const_iteratorIiEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %13) #4
  %44 = call { ptr, i8 } @_ZNSt3setIiSt4lessIiESaIiEE6insertERKi(ptr noundef nonnull align 8 dereferenceable(48) %42, ptr noundef nonnull align 4 dereferenceable(4) %43)
  %45 = getelementptr inbounds { ptr, i8 }, ptr %15, i32 0, i32 0
  %46 = extractvalue { ptr, i8 } %44, 0
  store ptr %46, ptr %45, align 8
  %47 = getelementptr inbounds { ptr, i8 }, ptr %15, i32 0, i32 1
  %48 = extractvalue { ptr, i8 } %44, 1
  store i8 %48, ptr %47, align 8
  %49 = load ptr, ptr %8, align 8, !tbaa !5
  %50 = load i32, ptr %9, align 4, !tbaa !9
  %51 = load i32, ptr %10, align 4, !tbaa !9
  %52 = sub nsw i32 %51, 1
  %53 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorIiEppEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %16, ptr align 8 %53, i64 8, i1 false), !tbaa.struct !11
  %54 = load ptr, ptr %11, align 8, !tbaa !5
  %55 = load ptr, ptr %12, align 8, !tbaa !5
  %56 = getelementptr inbounds %"struct.std::_Rb_tree_const_iterator", ptr %16, i32 0, i32 0
  %57 = load ptr, ptr %56, align 8
  call void @_Z13subset_finderRSt3setIiSt4lessIiESaIiEEiiSt23_Rb_tree_const_iteratorIiER2lkS4_(ptr noundef nonnull align 8 dereferenceable(48) %49, i32 noundef %50, i32 noundef %52, ptr %57, ptr noundef nonnull align 8 dereferenceable(52) %54, ptr noundef nonnull align 8 dereferenceable(48) %55)
  %58 = load ptr, ptr %12, align 8, !tbaa !5
  %59 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt23_Rb_tree_const_iteratorIiEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %13) #4
  %60 = call noundef i64 @_ZNSt3setIiSt4lessIiESaIiEE5eraseERKi(ptr noundef nonnull align 8 dereferenceable(48) %58, ptr noundef nonnull align 4 dereferenceable(4) %59)
  br label %61

61:                                               ; preds = %41
  %62 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorIiEppEv(ptr noundef nonnull align 8 dereferenceable(8) %13) #4
  br label %35, !llvm.loop !12

63:                                               ; preds = %40
  br label %64

64:                                               ; preds = %63, %33
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorIiEppEv(ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 nounwind willreturn memory(argmem: readwrite) }
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 = !{!"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 = !{i64 0, i64 8, !5}
!12 = distinct !{!12, !13}
!13 = !{!"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 }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local { ptr, i8 } @_ZNSt3setIiSt4lessIiESaIiEE6insertERKi(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNKSt3mapISt3setIiSt4lessIiESaIiEEiS1_IS4_ESaISt4pairIKS4_iEEE5countERS7_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapISt3setIiSt4lessIiESaIiEEiS1_IS4_ESaISt4pairIKS4_iEEEixERS7_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNSt3setIiSt4lessIiESaIiEE5eraseERKi(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNKSt3setIiSt4lessIiESaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorIiES2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #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 #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z13subset_finderRSt3setIiSt4lessIiESaIiEEiiSt23_Rb_tree_const_iteratorIiER2lkS4_(ptr noundef nonnull align 8 dereferenceable(48) %0, i32 noundef %1, i32 noundef %2, ptr %3, ptr noundef nonnull align 8 dereferenceable(52) %4, ptr noundef nonnull align 8 dereferenceable(48) %5) local_unnamed_addr #1 {
  %7 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %8 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  %9 = alloca %"struct.std::_Rb_tree_const_iterator", align 8
  store ptr %3, ptr %7, align 8
  %10 = icmp eq i32 %2, 0
  br i1 %10, label %11, label %17

11:                                               ; preds = %6
  %12 = tail call noundef i64 @_ZNKSt3mapISt3setIiSt4lessIiESaIiEEiS1_IS4_ESaISt4pairIKS4_iEEE5countERS7_(ptr noundef nonnull align 8 dereferenceable(48) %4, ptr noundef nonnull align 8 dereferenceable(48) %5)
  %.not = icmp eq i64 %12, 0
  br i1 %.not, label %31, label %13

13:                                               ; preds = %11
  %14 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapISt3setIiSt4lessIiESaIiEEiS1_IS4_ESaISt4pairIKS4_iEEEixERS7_(ptr noundef nonnull align 8 dereferenceable(48) %4, ptr noundef nonnull align 8 dereferenceable(48) %5)
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = add nsw i32 %15, 1
  store i32 %16, ptr %14, align 4, !tbaa !5
  br label %31

17:                                               ; preds = %6
  %18 = ptrtoint ptr %3 to i64
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %8) #3
  store i64 %18, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %9) #3
  %19 = tail call ptr @_ZNKSt3setIiSt4lessIiESaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %0) #3
  store ptr %19, ptr %9, align 8
  %20 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorIiES2_(ptr noundef nonnull align 8 dereferenceable(8) %8, ptr noundef nonnull align 8 dereferenceable(8) %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %9) #3
  br i1 %20, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %17
  %21 = add nsw i32 %2, -1
  br label %22

._crit_edge:                                      ; preds = %22, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %8) #3
  br label %31

22:                                               ; preds = %.lr.ph, %22
  %23 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt23_Rb_tree_const_iteratorIiEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %8) #3
  %24 = call { ptr, i8 } @_ZNSt3setIiSt4lessIiESaIiEE6insertERKi(ptr noundef nonnull align 8 dereferenceable(48) %5, ptr noundef nonnull align 4 dereferenceable(4) %23)
  %25 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorIiEppEv(ptr noundef nonnull align 8 dereferenceable(8) %7) #3
  %.sroa.0.0.copyload = load ptr, ptr %25, align 8, !tbaa !9
  call void @_Z13subset_finderRSt3setIiSt4lessIiESaIiEEiiSt23_Rb_tree_const_iteratorIiER2lkS4_(ptr noundef nonnull align 8 dereferenceable(48) %0, i32 noundef %1, i32 noundef %21, ptr %.sroa.0.0.copyload, ptr noundef nonnull align 8 dereferenceable(52) %4, ptr noundef nonnull align 8 dereferenceable(48) %5)
  %26 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt23_Rb_tree_const_iteratorIiEdeEv(ptr noundef nonnull align 8 dereferenceable(8) %8) #3
  %27 = call noundef i64 @_ZNSt3setIiSt4lessIiESaIiEE5eraseERKi(ptr noundef nonnull align 8 dereferenceable(48) %5, ptr noundef nonnull align 4 dereferenceable(4) %26)
  %28 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorIiEppEv(ptr noundef nonnull align 8 dereferenceable(8) %8) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %9) #3
  %29 = call ptr @_ZNKSt3setIiSt4lessIiESaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(48) %0) #3
  store ptr %29, ptr %9, align 8
  %30 = call noundef zeroext i1 @_ZStneRKSt23_Rb_tree_const_iteratorIiES2_(ptr noundef nonnull align 8 dereferenceable(8) %8, ptr noundef nonnull align 8 dereferenceable(8) %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %9) #3
  br i1 %30, label %22, label %._crit_edge, !llvm.loop !11

31:                                               ; preds = %11, %13, %._crit_edge
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt23_Rb_tree_const_iteratorIiEppEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = { 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"}


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