; LLVM IR from vczh/herodb :: Kernel/Source/Utility (FileBuffer)

; 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.vl::Ptr" = type { ptr, ptr, ptr, ptr }
%"struct.vl::database::IdObject" = type { i64 }
%"class.vl::database::buffer_internal::FileFreePages" = type { %"class.vl::Object", i64, %"class.vl::collections::List.8", i64, i64, ptr, ptr }
%"class.vl::Object" = type { ptr }
%"class.vl::collections::List.8" = type { %"class.vl::collections::ListBase.base", %"class.vl::collections::IEnumerable" }
%"class.vl::collections::ListBase.base" = type <{ %"class.vl::collections::ArrayBase.base", i64, i8 }>
%"class.vl::collections::ArrayBase.base" = type { %"class.vl::collections::ListStore", ptr, i64 }
%"class.vl::collections::ListStore" = type { %"class.vl::Object" }
%"class.vl::collections::IEnumerable" = type { %"class.vl::Interface" }
%"class.vl::Interface" = type { ptr }
%"class.vl::database::BufferPageDesc" = type <{ ptr, i64, i8, [7 x i8], i64, i8, [7 x i8] }>

declare i32 @__gxx_personality_v0(...)

; 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 void @_ZN2vl8database15buffer_internal11FileMapping7MapPageENS0_8IdObjectImLl1EEE(ptr dead_on_unwind noalias writable sret(%"class.vl::Ptr") align 8, ptr noundef nonnull align 8 dereferenceable(152), i64) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK2vl3PtrINS_8database14BufferPageDescEEptEv(ptr noundef nonnull align 8 dereferenceable(32)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN2vl3PtrINS_8database14BufferPageDescEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN2vl8database8IdObjectImLl1EEC2Em(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) unnamed_addr #2 align 2

; 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 uwtable
declare dso_local noundef zeroext i1 @_ZN2vl11collections8ListBaseImmE5ClearEv(ptr noundef nonnull align 8 dereferenceable(33)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZN2vl11collections4ListImmE3AddERKm(ptr noundef nonnull align 8 dereferenceable(33), ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNK2vl11collections9ArrayBaseImE5CountEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN2vl8database15buffer_internal13FileFreePages24InitializeExistingSourceEPNS1_11FileMappingEPNS1_12FileUseMasksE(ptr noundef nonnull align 8 dereferenceable(96) %0, ptr noundef %1, ptr noundef %2) #1 align 2 personality ptr @__gxx_personality_v0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca %"struct.vl::database::IdObject", align 8
  %8 = alloca %"class.vl::Ptr", align 8
  %9 = alloca %"struct.vl::database::IdObject", align 8
  %10 = alloca ptr, align 8
  %11 = alloca ptr, align 8
  %12 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  %13 = load ptr, ptr %4, align 8
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %13, i32 0, i32 5
  store ptr %14, ptr %15, align 8, !tbaa !9
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %13, i32 0, i32 6
  store ptr %16, ptr %17, align 8, !tbaa !18
  %18 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %13, i32 0, i32 2
  %19 = call noundef zeroext i1 @_ZN2vl11collections8ListBaseImmE5ClearEv(ptr noundef nonnull align 8 dereferenceable(33) %18)
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  call void @_ZN2vl8database8IdObjectImLl1EEC2Em(ptr noundef nonnull align 8 dereferenceable(8) %7, i64 noundef 1)
  br label %20

20:                                               ; preds = %54, %3
  %21 = getelementptr inbounds %"struct.vl::database::IdObject", ptr %7, i32 0, i32 0
  %22 = load i64, ptr %21, align 8, !tbaa !19
  %23 = icmp ne i64 %22, -1
  br i1 %23, label %24, label %55

24:                                               ; preds = %20
  %25 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %13, i32 0, i32 2
  %26 = getelementptr inbounds %"struct.vl::database::IdObject", ptr %7, i32 0, i32 0
  %27 = call noundef i64 @_ZN2vl11collections4ListImmE3AddERKm(ptr noundef nonnull align 8 dereferenceable(33) %25, ptr noundef nonnull align 8 dereferenceable(8) %26)
  call void @llvm.lifetime.start.p0(i64 32, ptr %8) #4
  %28 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %13, i32 0, i32 5
  %29 = load ptr, ptr %28, align 8, !tbaa !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %9, ptr align 8 %7, i64 8, i1 false), !tbaa.struct !21
  %30 = getelementptr inbounds %"struct.vl::database::IdObject", ptr %9, i32 0, i32 0
  %31 = load i64, ptr %30, align 8
  call void @_ZN2vl8database15buffer_internal11FileMapping7MapPageENS0_8IdObjectImLl1EEE(ptr dead_on_unwind writable sret(%"class.vl::Ptr") align 8 %8, ptr noundef nonnull align 8 dereferenceable(152) %29, i64 %31)
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %32 = invoke noundef ptr @_ZNK2vl3PtrINS_8database14BufferPageDescEEptEv(ptr noundef nonnull align 8 dereferenceable(32) %8)
          to label %33 unwind label %50

33:                                               ; preds = %24
  %34 = getelementptr inbounds %"class.vl::database::BufferPageDesc", ptr %32, i32 0, i32 0
  %35 = load ptr, ptr %34, align 8, !tbaa !23
  store ptr %35, ptr %10, align 8, !tbaa !5
  %36 = load ptr, ptr %10, align 8, !tbaa !5
  %37 = getelementptr inbounds i64, ptr %36, i64 0
  %38 = load i64, ptr %37, align 8, !tbaa !22
  %39 = getelementptr inbounds %"struct.vl::database::IdObject", ptr %7, i32 0, i32 0
  store i64 %38, ptr %39, align 8, !tbaa !19
  %40 = load ptr, ptr %10, align 8, !tbaa !5
  %41 = getelementptr inbounds i64, ptr %40, i64 1
  %42 = load i64, ptr %41, align 8, !tbaa !22
  %43 = icmp ne i64 %42, 0
  br i1 %43, label %44, label %54

44:                                               ; preds = %33
  %45 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %13, i32 0, i32 2
  %46 = invoke noundef i64 @_ZNK2vl11collections9ArrayBaseImE5CountEv(ptr noundef nonnull align 8 dereferenceable(24) %45)
          to label %47 unwind label %50

47:                                               ; preds = %44
  %48 = sub nsw i64 %46, 1
  %49 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %13, i32 0, i32 3
  store i64 %48, ptr %49, align 8, !tbaa !25
  br label %54

50:                                               ; preds = %44, %24
  %51 = landingpad { ptr, i32 }
          cleanup
  %52 = extractvalue { ptr, i32 } %51, 0
  store ptr %52, ptr %11, align 8
  %53 = extractvalue { ptr, i32 } %51, 1
  store i32 %53, ptr %12, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  call void @_ZN2vl3PtrINS_8database14BufferPageDescEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %8) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  br label %62

54:                                               ; preds = %47, %33
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  call void @_ZN2vl3PtrINS_8database14BufferPageDescEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %8) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %8) #4
  br label %20, !llvm.loop !26

55:                                               ; preds = %20
  %56 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %13, i32 0, i32 3
  %57 = load i64, ptr %56, align 8, !tbaa !25
  %58 = icmp eq i64 %57, -1
  br i1 %58, label %59, label %61

59:                                               ; preds = %55
  %60 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %13, i32 0, i32 3
  store i64 0, ptr %60, align 8, !tbaa !25
  br label %61

61:                                               ; preds = %59, %55
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  ret void

62:                                               ; preds = %50
  %63 = load ptr, ptr %11, align 8
  %64 = load i32, ptr %12, align 4
  %65 = insertvalue { ptr, i32 } poison, ptr %63, 0
  %66 = insertvalue { ptr, i32 } %65, i32 %64, 1
  resume { ptr, i32 } %66
}

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, !6, i64 80}
!10 = !{!"_ZTSN2vl8database15buffer_internal13FileFreePagesE", !11, i64 0, !12, i64 8, !13, i64 16, !12, i64 64, !12, i64 72, !6, i64 80, !6, i64 88}
!11 = !{!"_ZTSN2vl6ObjectE"}
!12 = !{!"long", !7, i64 0}
!13 = !{!"_ZTSN2vl11collections4ListImmEE", !14, i64 0}
!14 = !{!"_ZTSN2vl11collections8ListBaseImmEE", !15, i64 0, !12, i64 24, !17, i64 32}
!15 = !{!"_ZTSN2vl11collections9ArrayBaseImEE", !16, i64 0, !6, i64 8, !12, i64 16}
!16 = !{!"_ZTSN2vl11collections9ListStoreImLb1EEE", !11, i64 0}
!17 = !{!"bool", !7, i64 0}
!18 = !{!10, !6, i64 88}
!19 = !{!20, !12, i64 0}
!20 = !{!"_ZTSN2vl8database8IdObjectImLl1EEE", !12, i64 0}
!21 = !{i64 0, i64 8, !22}
!22 = !{!12, !12, i64 0}
!23 = !{!24, !6, i64 0}
!24 = !{!"_ZTSN2vl8database14BufferPageDescE", !6, i64 0, !12, i64 8, !17, i64 16, !12, i64 24, !17, i64 32}
!25 = !{!10, !12, i64 64}
!26 = distinct !{!26, !27}
!27 = !{!"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"

%"class.vl::Ptr" = type { ptr, ptr, ptr, ptr }
%"struct.vl::database::IdObject" = type { i64 }

declare i32 @__gxx_personality_v0(...)

; 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 void @_ZN2vl8database15buffer_internal11FileMapping7MapPageENS0_8IdObjectImLl1EEE(ptr dead_on_unwind noalias writable sret(%"class.vl::Ptr") align 8, ptr noundef nonnull align 8 dereferenceable(152), i64) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK2vl3PtrINS_8database14BufferPageDescEEptEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN2vl3PtrINS_8database14BufferPageDescEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN2vl8database8IdObjectImLl1EEC2Em(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN2vl11collections8ListBaseImmE5ClearEv(ptr noundef nonnull align 8 dereferenceable(33)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZN2vl11collections4ListImmE3AddERKm(ptr noundef nonnull align 8 dereferenceable(33), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNK2vl11collections9ArrayBaseImE5CountEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN2vl8database15buffer_internal13FileFreePages24InitializeExistingSourceEPNS1_11FileMappingEPNS1_12FileUseMasksE(ptr noundef nonnull align 8 dereferenceable(96) %0, ptr noundef %1, ptr noundef %2) local_unnamed_addr #1 align 2 personality ptr @__gxx_personality_v0 {
  %4 = alloca %"struct.vl::database::IdObject", align 8
  %5 = alloca %"class.vl::Ptr", align 8
  %6 = getelementptr inbounds i8, ptr %0, i64 80
  store ptr %1, ptr %6, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %0, i64 88
  store ptr %2, ptr %7, align 8, !tbaa !17
  %8 = getelementptr inbounds i8, ptr %0, i64 16
  %9 = tail call noundef zeroext i1 @_ZN2vl11collections8ListBaseImmE5ClearEv(ptr noundef nonnull align 8 dereferenceable(33) %8)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  call void @_ZN2vl8database8IdObjectImLl1EEC2Em(ptr noundef nonnull align 8 dereferenceable(8) %4, i64 noundef 1)
  %10 = load i64, ptr %4, align 8, !tbaa !18
  %.not6 = icmp eq i64 %10, -1
  br i1 %.not6, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %11 = getelementptr inbounds i8, ptr %0, i64 64
  br label %12

12:                                               ; preds = %.lr.ph, %23
  %13 = call noundef i64 @_ZN2vl11collections4ListImmE3AddERKm(ptr noundef nonnull align 8 dereferenceable(33) %8, ptr noundef nonnull align 8 dereferenceable(8) %4)
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %5) #3
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %.sroa.0.0.copyload = load i64, ptr %4, align 8, !tbaa !20
  call void @_ZN2vl8database15buffer_internal11FileMapping7MapPageENS0_8IdObjectImLl1EEE(ptr dead_on_unwind nonnull writable sret(%"class.vl::Ptr") align 8 %5, ptr noundef nonnull align 8 dereferenceable(152) %14, i64 %.sroa.0.0.copyload)
  %15 = call noundef ptr @_ZNK2vl3PtrINS_8database14BufferPageDescEEptEv(ptr noundef nonnull align 8 dereferenceable(32) %5)
  %16 = load ptr, ptr %15, align 8, !tbaa !21
  %17 = load i64, ptr %16, align 8, !tbaa !20
  store i64 %17, ptr %4, align 8, !tbaa !18
  %18 = getelementptr inbounds i8, ptr %16, i64 8
  %19 = load i64, ptr %18, align 8, !tbaa !20
  %.not5 = icmp eq i64 %19, 0
  br i1 %.not5, label %23, label %20

20:                                               ; preds = %12
  %21 = call noundef i64 @_ZNK2vl11collections9ArrayBaseImE5CountEv(ptr noundef nonnull align 8 dereferenceable(24) %8)
  %22 = add nsw i64 %21, -1
  store i64 %22, ptr %11, align 8, !tbaa !23
  br label %23

23:                                               ; preds = %20, %12
  call void @_ZN2vl3PtrINS_8database14BufferPageDescEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %5) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #3
  %24 = load i64, ptr %4, align 8, !tbaa !18
  %.not = icmp eq i64 %24, -1
  br i1 %.not, label %._crit_edge, label %12, !llvm.loop !24

._crit_edge:                                      ; preds = %23, %3
  %25 = getelementptr inbounds i8, ptr %0, i64 64
  %26 = load i64, ptr %25, align 8, !tbaa !23
  %27 = icmp eq i64 %26, -1
  br i1 %27, label %28, label %29

28:                                               ; preds = %._crit_edge
  store i64 0, ptr %25, align 8, !tbaa !23
  br label %29

29:                                               ; preds = %28, %._crit_edge
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  ret void
}

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, !15, i64 80}
!6 = !{!"_ZTSN2vl8database15buffer_internal13FileFreePagesE", !7, i64 0, !8, i64 8, !11, i64 16, !8, i64 64, !8, i64 72, !15, i64 80, !15, i64 88}
!7 = !{!"_ZTSN2vl6ObjectE"}
!8 = !{!"long", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = !{!"_ZTSN2vl11collections4ListImmEE", !12, i64 0}
!12 = !{!"_ZTSN2vl11collections8ListBaseImmEE", !13, i64 0, !8, i64 24, !16, i64 32}
!13 = !{!"_ZTSN2vl11collections9ArrayBaseImEE", !14, i64 0, !15, i64 8, !8, i64 16}
!14 = !{!"_ZTSN2vl11collections9ListStoreImLb1EEE", !7, i64 0}
!15 = !{!"any pointer", !9, i64 0}
!16 = !{!"bool", !9, i64 0}
!17 = !{!6, !15, i64 88}
!18 = !{!19, !8, i64 0}
!19 = !{!"_ZTSN2vl8database8IdObjectImLl1EEE", !8, i64 0}
!20 = !{!8, !8, i64 0}
!21 = !{!22, !15, i64 0}
!22 = !{!"_ZTSN2vl8database14BufferPageDescE", !15, i64 0, !8, i64 8, !16, i64 16, !8, i64 24, !16, i64 32}
!23 = !{!6, !8, i64 64}
!24 = distinct !{!24, !25}
!25 = !{!"llvm.loop.mustprogress"}


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