; LLVM IR from mfem/mfem :: general/gecko.ll (ZNK5Gecko5Graph8directedEv)

; 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.Gecko::Graph" = type { ptr, ptr, %"class.std::vector", %"class.std::vector.0", %"class.std::vector", %"class.std::vector.5", %"class.std::vector.5", i32, i32 }
%"class.std::vector.0" = type { %"struct.std::_Vector_base.1" }
%"struct.std::_Vector_base.1" = type { %"struct.std::_Vector_base<Gecko::Node, std::allocator<Gecko::Node>>::_Vector_impl" }
%"struct.std::_Vector_base<Gecko::Node, std::allocator<Gecko::Node>>::_Vector_impl" = type { %"struct.std::_Vector_base<Gecko::Node, std::allocator<Gecko::Node>>::_Vector_impl_data" }
%"struct.std::_Vector_base<Gecko::Node, std::allocator<Gecko::Node>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<unsigned int, std::allocator<unsigned int>>::_Vector_impl" }
%"struct.std::_Vector_base<unsigned int, std::allocator<unsigned int>>::_Vector_impl" = type { %"struct.std::_Vector_base<unsigned int, std::allocator<unsigned int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<unsigned int, std::allocator<unsigned int>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.5" = type { %"struct.std::_Vector_base.6" }
%"struct.std::_Vector_base.6" = type { %"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl" }
%"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl" = type { %"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl_data" }
%"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl_data" = type { 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 nounwind uwtable
declare dso_local noundef i32 @_ZNK5Gecko5Graph10node_beginEj(ptr noundef nonnull align 8 dereferenceable(144), i32 noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK5Gecko5Graph8node_endEj(ptr noundef nonnull align 8 dereferenceable(144), i32 noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIN5Gecko4NodeESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZNK5Gecko5Graph9arc_indexEjj(ptr noundef nonnull align 8 dereferenceable(144), i32 noundef, i32 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZNK5Gecko5Graph8directedEv(ptr noundef nonnull align 8 dereferenceable(144) %0) #2 align 2 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %8 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 1, ptr %4, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %47, %1
  %10 = load i32, ptr %4, align 4, !tbaa !9
  %11 = zext i32 %10 to i64
  %12 = getelementptr inbounds %"class.Gecko::Graph", ptr %8, i32 0, i32 3
  %13 = call noundef i64 @_ZNKSt6vectorIN5Gecko4NodeESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %12) #3
  %14 = icmp ult i64 %11, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %9
  store i32 2, ptr %5, align 4
  br label %50

16:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %17 = load i32, ptr %4, align 4, !tbaa !9
  %18 = call noundef i32 @_ZNK5Gecko5Graph10node_beginEj(ptr noundef nonnull align 8 dereferenceable(144) %8, i32 noundef %17)
  store i32 %18, ptr %6, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %41, %16
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = load i32, ptr %4, align 4, !tbaa !9
  %22 = call noundef i32 @_ZNK5Gecko5Graph8node_endEj(ptr noundef nonnull align 8 dereferenceable(144) %8, i32 noundef %21)
  %23 = icmp ult i32 %20, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %19
  store i32 5, ptr %5, align 4
  br label %44

25:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %26 = getelementptr inbounds %"class.Gecko::Graph", ptr %8, i32 0, i32 4
  %27 = load i32, ptr %6, align 4, !tbaa !9
  %28 = zext i32 %27 to i64
  %29 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %26, i64 noundef %28) #3
  %30 = load i32, ptr %29, align 4, !tbaa !9
  store i32 %30, ptr %7, align 4, !tbaa !9
  %31 = load i32, ptr %7, align 4, !tbaa !9
  %32 = load i32, ptr %4, align 4, !tbaa !9
  %33 = call noundef i32 @_ZNK5Gecko5Graph9arc_indexEjj(ptr noundef nonnull align 8 dereferenceable(144) %8, i32 noundef %31, i32 noundef %32)
  %34 = icmp ne i32 %33, 0
  br i1 %34, label %37, label %35

35:                                               ; preds = %25
  %36 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %36, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %38

37:                                               ; preds = %25
  store i32 0, ptr %5, align 4
  br label %38

38:                                               ; preds = %37, %35
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  %39 = load i32, ptr %5, align 4
  switch i32 %39, label %44 [
    i32 0, label %40
  ]

40:                                               ; preds = %38
  br label %41

41:                                               ; preds = %40
  %42 = load i32, ptr %6, align 4, !tbaa !9
  %43 = add i32 %42, 1
  store i32 %43, ptr %6, align 4, !tbaa !9
  br label %19, !llvm.loop !11

44:                                               ; preds = %38, %24
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %45 = load i32, ptr %5, align 4
  switch i32 %45, label %50 [
    i32 5, label %46
  ]

46:                                               ; preds = %44
  br label %47

47:                                               ; preds = %46
  %48 = load i32, ptr %4, align 4, !tbaa !9
  %49 = add i32 %48, 1
  store i32 %49, ptr %4, align 4, !tbaa !9
  br label %9, !llvm.loop !13

50:                                               ; preds = %44, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  %51 = load i32, ptr %5, align 4
  switch i32 %51, label %55 [
    i32 2, label %52
    i32 1, label %53
  ]

52:                                               ; preds = %50
  store i32 0, ptr %2, align 4
  br label %53

53:                                               ; preds = %52, %50
  %54 = load i32, ptr %2, align 4
  ret i32 %54

55:                                               ; preds = %50
  unreachable
}

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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !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"

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK5Gecko5Graph10node_beginEj(ptr noundef nonnull align 8 dereferenceable(144), i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK5Gecko5Graph8node_endEj(ptr noundef nonnull align 8 dereferenceable(144), i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIN5Gecko4NodeESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZNK5Gecko5Graph9arc_indexEjj(ptr noundef nonnull align 8 dereferenceable(144), i32 noundef, i32 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZNK5Gecko5Graph8directedEv(ptr noundef nonnull align 8 dereferenceable(144) %0) local_unnamed_addr #1 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 40
  %3 = tail call noundef i64 @_ZNKSt6vectorIN5Gecko4NodeESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %2) #2
  %.not2227 = icmp ugt i64 %3, 1
  br i1 %.not2227, label %.lr.ph30, label %.thread

.lr.ph30:                                         ; preds = %1
  %4 = getelementptr inbounds i8, ptr %0, i64 64
  br label %5

5:                                                ; preds = %.lr.ph30, %._crit_edge
  %.01928 = phi i32 [ 1, %.lr.ph30 ], [ %15, %._crit_edge ]
  %6 = tail call noundef i32 @_ZNK5Gecko5Graph10node_beginEj(ptr noundef nonnull align 8 dereferenceable(144) %0, i32 noundef %.01928)
  %7 = tail call noundef i32 @_ZNK5Gecko5Graph8node_endEj(ptr noundef nonnull align 8 dereferenceable(144) %0, i32 noundef %.01928)
  %.not25 = icmp ult i32 %6, %7
  br i1 %.not25, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %5
  %8 = zext i32 %6 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %12
  %indvars.iv = phi i64 [ %8, %.lr.ph.preheader ], [ %indvars.iv.next, %12 ]
  %9 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %indvars.iv) #2
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = tail call noundef i32 @_ZNK5Gecko5Graph9arc_indexEjj(ptr noundef nonnull align 8 dereferenceable(144) %0, i32 noundef %10, i32 noundef %.01928)
  %.not.not = icmp eq i32 %11, 0
  br i1 %.not.not, label %.thread.loopexit, label %12

12:                                               ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %13 = tail call noundef i32 @_ZNK5Gecko5Graph8node_endEj(ptr noundef nonnull align 8 dereferenceable(144) %0, i32 noundef %.01928)
  %14 = zext i32 %13 to i64
  %.not = icmp ult i64 %indvars.iv.next, %14
  br i1 %.not, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %12, %5
  %15 = add i32 %.01928, 1
  %16 = zext i32 %15 to i64
  %17 = tail call noundef i64 @_ZNKSt6vectorIN5Gecko4NodeESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %2) #2
  %.not22 = icmp ugt i64 %17, %16
  br i1 %.not22, label %5, label %.thread, !llvm.loop !11

.thread.loopexit:                                 ; preds = %.lr.ph
  %18 = trunc nuw i64 %indvars.iv to i32
  br label %.thread

.thread:                                          ; preds = %._crit_edge, %.thread.loopexit, %1
  %spec.select = phi i32 [ 0, %1 ], [ %18, %.thread.loopexit ], [ 0, %._crit_edge ]
  ret i32 %spec.select
}

attributes #0 = { 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 #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 = { 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"}
!11 = distinct !{!11, !10}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass