; LLVM IR from o0o0o0o0o0o0o/image-processing-from-scratch :: ImageMatting/Eigen/demos/opengl/icosphere.ll (ZNK9IcoSphere7indicesEi)

; 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.IcoSphere = type { %"class.std::vector", %"class.std::vector.0", %"class.std::vector.5" }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<Eigen::Matrix<float, 3, 1>, std::allocator<Eigen::Matrix<float, 3, 1>>>::_Vector_impl" }
%"struct.std::_Vector_base<Eigen::Matrix<float, 3, 1>, std::allocator<Eigen::Matrix<float, 3, 1>>>::_Vector_impl" = type { %"struct.std::_Vector_base<Eigen::Matrix<float, 3, 1>, std::allocator<Eigen::Matrix<float, 3, 1>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<Eigen::Matrix<float, 3, 1>, std::allocator<Eigen::Matrix<float, 3, 1>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.0" = type { %"struct.std::_Vector_base.1" }
%"struct.std::_Vector_base.1" = type { %"struct.std::_Vector_base<std::vector<int> *, std::allocator<std::vector<int> *>>::_Vector_impl" }
%"struct.std::_Vector_base<std::vector<int> *, std::allocator<std::vector<int> *>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::vector<int> *, std::allocator<std::vector<int> *>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::vector<int> *, std::allocator<std::vector<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<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIPS_IiSaIiEESaIS2_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN9IcoSphere10_subdivideEv(ptr noundef nonnull align 8 dereferenceable(72)) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNK9IcoSphere7indicesEi(ptr noundef nonnull align 8 dereferenceable(72) %0, i32 noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load ptr, ptr %3, align 8
  br label %6

6:                                                ; preds = %12, %2
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = getelementptr inbounds %class.IcoSphere, ptr %5, i32 0, i32 1
  %9 = call noundef i64 @_ZNKSt6vectorIPS_IiSaIiEESaIS2_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %8) #2
  %10 = trunc i64 %9 to i32
  %11 = icmp sge i32 %7, %10
  br i1 %11, label %12, label %13

12:                                               ; preds = %6
  call void @_ZN9IcoSphere10_subdivideEv(ptr noundef nonnull align 8 dereferenceable(72) %5)
  br label %6, !llvm.loop !11

13:                                               ; preds = %6
  %14 = getelementptr inbounds %class.IcoSphere, ptr %5, i32 0, i32 1
  %15 = load i32, ptr %4, align 4, !tbaa !9
  %16 = sext i32 %15 to i64
  %17 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIPS_IiSaIiEESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %14, i64 noundef %16) #2
  %18 = load ptr, ptr %17, align 8, !tbaa !5
  ret ptr %18
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIPS_IiSaIiEESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

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 = !{!"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 i64 @_ZNKSt6vectorIPS_IiSaIiEESaIS2_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN9IcoSphere10_subdivideEv(ptr noundef nonnull align 8 dereferenceable(72)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNK9IcoSphere7indicesEi(ptr noundef nonnull align 8 dereferenceable(72) %0, i32 noundef %1) local_unnamed_addr #1 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 24
  %4 = tail call noundef i64 @_ZNKSt6vectorIPS_IiSaIiEESaIS2_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %3) #2
  %5 = trunc i64 %4 to i32
  %.not2 = icmp sgt i32 %5, %1
  br i1 %.not2, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  tail call void @_ZN9IcoSphere10_subdivideEv(ptr noundef nonnull align 8 dereferenceable(72) %0)
  %6 = tail call noundef i64 @_ZNKSt6vectorIPS_IiSaIiEESaIS2_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %3) #2
  %7 = trunc i64 %6 to i32
  %.not = icmp sgt i32 %7, %1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %2
  %8 = sext i32 %1 to i64
  %9 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIPS_IiSaIiEESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %8) #2
  %10 = load ptr, ptr %9, align 8, !tbaa !7
  ret ptr %10
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt6vectorIPS_IiSaIiEESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"any pointer", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}


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