; LLVM IR from apache/mxnet :: src/lib_api.ll (ZNK5mxnet3ext5Graph16topological_sortEv)

; 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::vector.47" = type { %"struct.std::_Vector_base.48" }
%"struct.std::_Vector_base.48" = type { %"struct.std::_Vector_base<mxnet::ext::Node *, std::allocator<mxnet::ext::Node *>>::_Vector_impl" }
%"struct.std::_Vector_base<mxnet::ext::Node *, std::allocator<mxnet::ext::Node *>>::_Vector_impl" = type { %"struct.std::_Vector_base<mxnet::ext::Node *, std::allocator<mxnet::ext::Node *>>::_Vector_impl_data" }
%"struct.std::_Vector_base<mxnet::ext::Node *, std::allocator<mxnet::ext::Node *>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%class.anon = type { ptr }
%"class.std::function" = type { %"class.std::_Function_base", ptr }
%"class.std::_Function_base" = type { %"union.std::_Any_data", ptr }
%"union.std::_Any_data" = type { %"union.std::_Nocopy_types" }
%"union.std::_Nocopy_types" = type { { i64, i64 } }

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 nounwind uwtable
declare dso_local void @_ZNSt6vectorIPN5mxnet3ext4NodeESaIS3_EEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIPN5mxnet3ext4NodeESaIS3_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZNK5mxnet3ext5Graph16topological_sortEv(ptr dead_on_unwind noalias writable sret(%"class.std::vector.47") align 8 %0, ptr noundef nonnull align 8 dereferenceable(128) %1) #2 align 2 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i1, align 1
  %6 = alloca %class.anon, align 8
  %7 = alloca %"class.std::function", align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %3, align 8
  store ptr %1, ptr %4, align 8, !tbaa !5
  %10 = load ptr, ptr %4, align 8
  store i1 false, ptr %5, align 1
  call void @_ZNSt6vectorIPN5mxnet3ext4NodeESaIS3_EEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %11 = getelementptr inbounds %class.anon, ptr %6, i32 0, i32 0
  store ptr %0, ptr %11, align 8, !tbaa !5
  call void @"_ZNSt8functionIFvPN5mxnet3ext4NodeEEEC2IRZNKS1_5Graph16topological_sortEvE3$_0vEEOT_"(ptr noundef nonnull align 8 dereferenceable(32) %7, ptr noundef nonnull align 8 dereferenceable(8) %6) #3
  invoke void @_ZNK5mxnet3ext5Graph3DFSESt8functionIFvPNS0_4NodeEEE(ptr noundef nonnull align 8 dereferenceable(128) %10, ptr noundef %7)
          to label %12 unwind label %14

12:                                               ; preds = %2
  call void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(32) %7) #3
  store i1 true, ptr %5, align 1
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %13 = load i1, ptr %5, align 1
  br i1 %13, label %19, label %18

14:                                               ; preds = %2
  %15 = landingpad { ptr, i32 }
          cleanup
  %16 = extractvalue { ptr, i32 } %15, 0
  store ptr %16, ptr %8, align 8
  %17 = extractvalue { ptr, i32 } %15, 1
  store i32 %17, ptr %9, align 4
  call void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(32) %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @_ZNSt6vectorIPN5mxnet3ext4NodeESaIS3_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  br label %20

18:                                               ; preds = %12
  call void @_ZNSt6vectorIPN5mxnet3ext4NodeESaIS3_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  br label %19

19:                                               ; preds = %18, %12
  ret void

20:                                               ; preds = %14
  %21 = load ptr, ptr %8, align 8
  %22 = load i32, ptr %9, align 4
  %23 = insertvalue { ptr, i32 } poison, ptr %21, 0
  %24 = insertvalue { ptr, i32 } %23, i32 %22, 1
  resume { ptr, i32 } %24
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK5mxnet3ext5Graph3DFSESt8functionIFvPNS0_4NodeEEE(ptr noundef nonnull align 8 dereferenceable(128), ptr noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare hidden void @"_ZNSt8functionIFvPN5mxnet3ext4NodeEEEC2IRZNKS1_5Graph16topological_sortEvE3$_0vEEOT_"(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; 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::vector.47" = type { %"struct.std::_Vector_base.48" }
%"struct.std::_Vector_base.48" = type { %"struct.std::_Vector_base<mxnet::ext::Node *, std::allocator<mxnet::ext::Node *>>::_Vector_impl" }
%"struct.std::_Vector_base<mxnet::ext::Node *, std::allocator<mxnet::ext::Node *>>::_Vector_impl" = type { %"struct.std::_Vector_base<mxnet::ext::Node *, std::allocator<mxnet::ext::Node *>>::_Vector_impl_data" }
%"struct.std::_Vector_base<mxnet::ext::Node *, std::allocator<mxnet::ext::Node *>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%class.anon = type { ptr }
%"class.std::function" = type { %"class.std::_Function_base", ptr }
%"class.std::_Function_base" = type { %"union.std::_Any_data", ptr }
%"union.std::_Any_data" = type { %"union.std::_Nocopy_types" }
%"union.std::_Nocopy_types" = type { { i64, 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 nounwind uwtable
declare dso_local void @_ZNSt6vectorIPN5mxnet3ext4NodeESaIS3_EEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIPN5mxnet3ext4NodeESaIS3_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZNK5mxnet3ext5Graph16topological_sortEv(ptr dead_on_unwind noalias nonnull writable sret(%"class.std::vector.47") align 8 %0, ptr noundef nonnull align 8 dereferenceable(128) %1) local_unnamed_addr #2 align 2 personality ptr @__gxx_personality_v0 {
  %3 = alloca %class.anon, align 8
  %4 = alloca %"class.std::function", align 8
  tail call void @_ZNSt6vectorIPN5mxnet3ext4NodeESaIS3_EEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @"_ZNSt8functionIFvPN5mxnet3ext4NodeEEEC2IRZNKS1_5Graph16topological_sortEvE3$_0vEEOT_"(ptr noundef nonnull align 8 dereferenceable(32) %4, ptr noundef nonnull align 8 dereferenceable(8) %3) #3
  invoke void @_ZNK5mxnet3ext5Graph3DFSESt8functionIFvPNS0_4NodeEEE(ptr noundef nonnull align 8 dereferenceable(128) %1, ptr noundef nonnull %4)
          to label %5 unwind label %6

5:                                                ; preds = %2
  call void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  ret void

6:                                                ; preds = %2
  %7 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @_ZNSt6vectorIPN5mxnet3ext4NodeESaIS3_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) #3
  resume { ptr, i32 } %7
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK5mxnet3ext5Graph3DFSESt8functionIFvPNS0_4NodeEEE(ptr noundef nonnull align 8 dereferenceable(128), ptr noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare hidden void @"_ZNSt8functionIFvPN5mxnet3ext4NodeEEEC2IRZNKS1_5Graph16topological_sortEvE3$_0vEEOT_"(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #1 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass