; LLVM IR from mfem/mfem :: general/gecko.ll (ZNK5Gecko5Graph11reverse_arcEj)

; 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 nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZNK5Gecko5Graph11reverse_arcEj(ptr noundef nonnull align 8 dereferenceable(144) %0, i32 noundef %1) #2 align 2 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %10 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %11 = getelementptr inbounds %"class.Gecko::Graph", ptr %10, i32 0, i32 4
  %12 = load i32, ptr %5, align 4, !tbaa !9
  %13 = zext i32 %12 to i64
  %14 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %11, i64 noundef %13) #3
  %15 = load i32, ptr %14, align 4, !tbaa !9
  store i32 %15, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = call noundef i32 @_ZNK5Gecko5Graph10node_beginEj(ptr noundef nonnull align 8 dereferenceable(144) %10, i32 noundef %16)
  store i32 %17, ptr %7, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %45, %2
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = call noundef i32 @_ZNK5Gecko5Graph8node_endEj(ptr noundef nonnull align 8 dereferenceable(144) %10, i32 noundef %20)
  %22 = icmp ult i32 %19, %21
  br i1 %22, label %24, label %23

23:                                               ; preds = %18
  store i32 2, ptr %8, align 4
  br label %48

24:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %25 = getelementptr inbounds %"class.Gecko::Graph", ptr %10, i32 0, i32 4
  %26 = load i32, ptr %7, align 4, !tbaa !9
  %27 = zext i32 %26 to i64
  %28 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %25, i64 noundef %27) #3
  %29 = load i32, ptr %28, align 4, !tbaa !9
  store i32 %29, ptr %9, align 4, !tbaa !9
  %30 = load i32, ptr %9, align 4, !tbaa !9
  %31 = call noundef i32 @_ZNK5Gecko5Graph10node_beginEj(ptr noundef nonnull align 8 dereferenceable(144) %10, i32 noundef %30)
  %32 = load i32, ptr %5, align 4, !tbaa !9
  %33 = icmp ule i32 %31, %32
  br i1 %33, label %34, label %41

34:                                               ; preds = %24
  %35 = load i32, ptr %5, align 4, !tbaa !9
  %36 = load i32, ptr %9, align 4, !tbaa !9
  %37 = call noundef i32 @_ZNK5Gecko5Graph8node_endEj(ptr noundef nonnull align 8 dereferenceable(144) %10, i32 noundef %36)
  %38 = icmp ult i32 %35, %37
  br i1 %38, label %39, label %41

39:                                               ; preds = %34
  %40 = load i32, ptr %7, align 4, !tbaa !9
  store i32 %40, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %42

41:                                               ; preds = %34, %24
  store i32 0, ptr %8, align 4
  br label %42

42:                                               ; preds = %41, %39
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  %43 = load i32, ptr %8, align 4
  switch i32 %43, label %48 [
    i32 0, label %44
  ]

44:                                               ; preds = %42
  br label %45

45:                                               ; preds = %44
  %46 = load i32, ptr %7, align 4, !tbaa !9
  %47 = add i32 %46, 1
  store i32 %47, ptr %7, align 4, !tbaa !9
  br label %18, !llvm.loop !11

48:                                               ; preds = %42, %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  %49 = load i32, ptr %8, align 4
  switch i32 %49, label %51 [
    i32 2, label %50
  ]

50:                                               ; preds = %48
  store i32 0, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %51

51:                                               ; preds = %50, %48
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %52 = load i32, ptr %3, align 4
  ret i32 %52
}

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"}


; 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 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 nounwind uwtable
define dso_local noundef i32 @_ZNK5Gecko5Graph11reverse_arcEj(ptr noundef nonnull align 8 dereferenceable(144) %0, i32 noundef %1) local_unnamed_addr #0 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 64
  %4 = zext i32 %1 to i64
  %5 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %4) #1
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = tail call noundef i32 @_ZNK5Gecko5Graph10node_beginEj(ptr noundef nonnull align 8 dereferenceable(144) %0, i32 noundef %6)
  %8 = tail call noundef i32 @_ZNK5Gecko5Graph8node_endEj(ptr noundef nonnull align 8 dereferenceable(144) %0, i32 noundef %6)
  %.not1923 = icmp ult i32 %7, %8
  br i1 %.not1923, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %9 = zext i32 %7 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %16
  %indvars.iv = phi i64 [ %9, %.lr.ph.preheader ], [ %indvars.iv.next, %16 ]
  %10 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %indvars.iv) #1
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = tail call noundef i32 @_ZNK5Gecko5Graph10node_beginEj(ptr noundef nonnull align 8 dereferenceable(144) %0, i32 noundef %11)
  %.not = icmp ugt i32 %12, %1
  br i1 %.not, label %16, label %13

13:                                               ; preds = %.lr.ph
  %14 = tail call noundef i32 @_ZNK5Gecko5Graph8node_endEj(ptr noundef nonnull align 8 dereferenceable(144) %0, i32 noundef %11)
  %15 = icmp ugt i32 %14, %1
  br i1 %15, label %._crit_edge.loopexit.split.loop.exit, label %16

16:                                               ; preds = %.lr.ph, %13
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %17 = tail call noundef i32 @_ZNK5Gecko5Graph8node_endEj(ptr noundef nonnull align 8 dereferenceable(144) %0, i32 noundef %6)
  %18 = zext i32 %17 to i64
  %.not19 = icmp ult i64 %indvars.iv.next, %18
  br i1 %.not19, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge.loopexit.split.loop.exit:             ; preds = %13
  %19 = trunc nuw i64 %indvars.iv to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %16, %._crit_edge.loopexit.split.loop.exit, %2
  %spec.select = phi i32 [ 0, %2 ], [ %19, %._crit_edge.loopexit.split.loop.exit ], [ 0, %16 ]
  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 = { 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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass