; LLVM IR from niessner/Matterport :: code/gaps/pkgs/R3Shapes/R3Mesh.ll (ZN6R3Mesh9FillHolesEv)

; 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"

; 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: inlinehint mustprogress uwtable
declare dso_local noundef i32 @_ZNK6R3Mesh6NEdgesEv(ptr noundef nonnull align 8 dereferenceable(272)) #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef ptr @_ZNK6R3Mesh4EdgeEi(ptr noundef nonnull align 8 dereferenceable(272), i32 noundef) #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK6R3Mesh16IsEdgeOnBoundaryEPK10R3MeshEdge(ptr noundef nonnull align 8 dereferenceable(272), ptr noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN6R3Mesh8FillHoleEP10R3MeshEdge(ptr noundef nonnull align 8 dereferenceable(272), ptr noundef) #3 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN6R3Mesh9FillHolesEv(ptr noundef nonnull align 8 dereferenceable(272) %0) #3 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %6 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %7

7:                                                ; preds = %24, %1
  %8 = load i32, ptr %3, align 4, !tbaa !9
  %9 = call noundef i32 @_ZNK6R3Mesh6NEdgesEv(ptr noundef nonnull align 8 dereferenceable(272) %6)
  %10 = icmp slt i32 %8, %9
  br i1 %10, label %12, label %11

11:                                               ; preds = %7
  store i32 2, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  br label %27

12:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %13 = load i32, ptr %3, align 4, !tbaa !9
  %14 = call noundef ptr @_ZNK6R3Mesh4EdgeEi(ptr noundef nonnull align 8 dereferenceable(272) %6, i32 noundef %13)
  store ptr %14, ptr %5, align 8, !tbaa !5
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = call noundef i32 @_ZNK6R3Mesh16IsEdgeOnBoundaryEPK10R3MeshEdge(ptr noundef nonnull align 8 dereferenceable(272) %6, ptr noundef %15)
  %17 = icmp ne i32 %16, 0
  br i1 %17, label %19, label %18

18:                                               ; preds = %12
  store i32 4, ptr %4, align 4
  br label %21

19:                                               ; preds = %12
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  call void @_ZN6R3Mesh8FillHoleEP10R3MeshEdge(ptr noundef nonnull align 8 dereferenceable(272) %6, ptr noundef %20)
  store i32 0, ptr %4, align 4
  br label %21

21:                                               ; preds = %19, %18
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  %22 = load i32, ptr %4, align 4
  switch i32 %22, label %28 [
    i32 0, label %23
    i32 4, label %24
  ]

23:                                               ; preds = %21
  br label %24

24:                                               ; preds = %23, %21
  %25 = load i32, ptr %3, align 4, !tbaa !9
  %26 = add nsw i32 %25, 1
  store i32 %26, ptr %3, align 4, !tbaa !9
  br label %7, !llvm.loop !11

27:                                               ; preds = %11
  ret void

28:                                               ; preds = %21
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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 = { inlinehint 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 = { 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 #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 = 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: inlinehint mustprogress uwtable
declare dso_local noundef i32 @_ZNK6R3Mesh6NEdgesEv(ptr noundef nonnull align 8 dereferenceable(272)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef ptr @_ZNK6R3Mesh4EdgeEi(ptr noundef nonnull align 8 dereferenceable(272), i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK6R3Mesh16IsEdgeOnBoundaryEPK10R3MeshEdge(ptr noundef nonnull align 8 dereferenceable(272), ptr noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN6R3Mesh8FillHoleEP10R3MeshEdge(ptr noundef nonnull align 8 dereferenceable(272), ptr noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN6R3Mesh9FillHolesEv(ptr noundef nonnull align 8 dereferenceable(272) %0) local_unnamed_addr #2 align 2 {
  %2 = tail call noundef i32 @_ZNK6R3Mesh6NEdgesEv(ptr noundef nonnull align 8 dereferenceable(272) %0)
  %3 = icmp sgt i32 %2, 0
  br i1 %3, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %7, %1
  ret void

.lr.ph:                                           ; preds = %1, %7
  %.05 = phi i32 [ %8, %7 ], [ 0, %1 ]
  %4 = tail call noundef ptr @_ZNK6R3Mesh4EdgeEi(ptr noundef nonnull align 8 dereferenceable(272) %0, i32 noundef %.05)
  %5 = tail call noundef i32 @_ZNK6R3Mesh16IsEdgeOnBoundaryEPK10R3MeshEdge(ptr noundef nonnull align 8 dereferenceable(272) %0, ptr noundef %4)
  %.not = icmp eq i32 %5, 0
  br i1 %.not, label %7, label %6

6:                                                ; preds = %.lr.ph
  tail call void @_ZN6R3Mesh8FillHoleEP10R3MeshEdge(ptr noundef nonnull align 8 dereferenceable(272) %0, ptr noundef %4)
  br label %7

7:                                                ; preds = %.lr.ph, %6
  %8 = add nuw nsw i32 %.05, 1
  %9 = tail call noundef i32 @_ZNK6R3Mesh6NEdgesEv(ptr noundef nonnull align 8 dereferenceable(272) %0)
  %10 = icmp slt i32 %8, %9
  br i1 %10, label %.lr.ph, label %._crit_edge, !llvm.loop !5
}

attributes #0 = { inlinehint 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 #1 = { inlinehint 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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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