; LLVM IR from Eydcao/Yan-CG-SnowSim :: src/BVH.ll (ZNK8BVHAccel9IntersectERK3Ray)

; 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"

%struct.Intersection = type { i8, %"class.Eigen::Matrix", %"class.Eigen::Matrix", double, ptr }
%"class.Eigen::Matrix" = type { %"class.Eigen::PlainObjectBase" }
%"class.Eigen::PlainObjectBase" = type { %"class.Eigen::DenseStorage" }
%"class.Eigen::DenseStorage" = type { %"struct.Eigen::internal::plain_array" }
%"struct.Eigen::internal::plain_array" = type { [3 x float] }
%class.BVHAccel = type { ptr, i32, i32, %"class.std::vector" }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<Shape *, std::allocator<Shape *>>::_Vector_impl" }
%"struct.std::_Vector_base<Shape *, std::allocator<Shape *>>::_Vector_impl" = type { %"struct.std::_Vector_base<Shape *, std::allocator<Shape *>>::_Vector_impl_data" }
%"struct.std::_Vector_base<Shape *, std::allocator<Shape *>>::_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 uwtable
define dso_local void @_ZNK8BVHAccel9IntersectERK3Ray(ptr dead_on_unwind noalias writable sret(%struct.Intersection) align 8 %0, ptr noundef nonnull align 8 dereferenceable(40) %1, ptr noundef nonnull align 8 dereferenceable(64) %2) #1 align 2 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca %struct.Intersection, align 8
  store ptr %0, ptr %4, align 8
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  %8 = load ptr, ptr %5, align 8
  call void @_ZN12IntersectionC2Ev(ptr noundef nonnull align 8 dereferenceable(48) %0)
  %9 = getelementptr inbounds %class.BVHAccel, ptr %8, i32 0, i32 0
  %10 = load ptr, ptr %9, align 8, !tbaa !9
  %11 = icmp ne ptr %10, null
  br i1 %11, label %13, label %12

12:                                               ; preds = %3
  br label %18

13:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 48, ptr %7) #3
  %14 = getelementptr inbounds %class.BVHAccel, ptr %8, i32 0, i32 0
  %15 = load ptr, ptr %14, align 8, !tbaa !9
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  call void @_ZNK8BVHAccel15getIntersectionEP12BVHBuildNodeRK3Ray(ptr dead_on_unwind writable sret(%struct.Intersection) align 8 %7, ptr noundef nonnull align 8 dereferenceable(40) %8, ptr noundef %15, ptr noundef nonnull align 8 dereferenceable(64) %16)
  %17 = call noundef nonnull align 8 dereferenceable(48) ptr @_ZN12IntersectionaSEOS_(ptr noundef nonnull align 8 dereferenceable(48) %0, ptr noundef nonnull align 8 dereferenceable(48) %7) #3
  call void @llvm.lifetime.end.p0(i64 48, ptr %7) #3
  br label %18

18:                                               ; preds = %13, %12
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN12IntersectionC2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK8BVHAccel15getIntersectionEP12BVHBuildNodeRK3Ray(ptr dead_on_unwind noalias writable sret(%struct.Intersection) align 8, ptr noundef nonnull align 8 dereferenceable(40), ptr noundef, ptr noundef nonnull align 8 dereferenceable(64)) #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(48) ptr @_ZN12IntersectionaSEOS_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(48)) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 = { 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, !6, i64 0}
!10 = !{!"_ZTS8BVHAccel", !6, i64 0, !11, i64 8, !12, i64 12, !13, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!"_ZTSN8BVHAccel11SplitMethodE", !7, i64 0}
!13 = !{!"_ZTSSt6vectorIP5ShapeSaIS1_EE", !14, i64 0}
!14 = !{!"_ZTSSt12_Vector_baseIP5ShapeSaIS1_EE", !15, i64 0}
!15 = !{!"_ZTSNSt12_Vector_baseIP5ShapeSaIS1_EE12_Vector_implE", !16, i64 0}
!16 = !{!"_ZTSNSt12_Vector_baseIP5ShapeSaIS1_EE17_Vector_impl_dataE", !6, i64 0, !6, i64 8, !6, i64 16}


; 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"

%struct.Intersection = type { i8, %"class.Eigen::Matrix", %"class.Eigen::Matrix", double, ptr }
%"class.Eigen::Matrix" = type { %"class.Eigen::PlainObjectBase" }
%"class.Eigen::PlainObjectBase" = type { %"class.Eigen::DenseStorage" }
%"class.Eigen::DenseStorage" = type { %"struct.Eigen::internal::plain_array" }
%"struct.Eigen::internal::plain_array" = type { [3 x float] }

; 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 uwtable
define dso_local void @_ZNK8BVHAccel9IntersectERK3Ray(ptr dead_on_unwind noalias nonnull writable sret(%struct.Intersection) align 8 %0, ptr noundef nonnull align 8 dereferenceable(40) %1, ptr noundef nonnull align 8 dereferenceable(64) %2) local_unnamed_addr #1 align 2 {
  %4 = alloca %struct.Intersection, align 8
  tail call void @_ZN12IntersectionC2Ev(ptr noundef nonnull align 8 dereferenceable(48) %0)
  %5 = load ptr, ptr %1, align 8, !tbaa !5
  %.not = icmp eq ptr %5, null
  br i1 %.not, label %8, label %6

6:                                                ; preds = %3
  call void @llvm.lifetime.start.p0(i64 48, ptr nonnull %4) #3
  call void @_ZNK8BVHAccel15getIntersectionEP12BVHBuildNodeRK3Ray(ptr dead_on_unwind nonnull writable sret(%struct.Intersection) align 8 %4, ptr noundef nonnull align 8 dereferenceable(40) %1, ptr noundef nonnull %5, ptr noundef nonnull align 8 dereferenceable(64) %2)
  %7 = call noundef nonnull align 8 dereferenceable(48) ptr @_ZN12IntersectionaSEOS_(ptr noundef nonnull align 8 dereferenceable(48) %0, ptr noundef nonnull align 8 dereferenceable(48) %4) #3
  call void @llvm.lifetime.end.p0(i64 48, ptr nonnull %4) #3
  br label %8

8:                                                ; preds = %3, %6
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN12IntersectionC2Ev(ptr noundef nonnull align 8 dereferenceable(48)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK8BVHAccel15getIntersectionEP12BVHBuildNodeRK3Ray(ptr dead_on_unwind noalias writable sret(%struct.Intersection) align 8, ptr noundef nonnull align 8 dereferenceable(40), ptr noundef, ptr noundef nonnull align 8 dereferenceable(64)) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(48) ptr @_ZN12IntersectionaSEOS_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 8 dereferenceable(48)) local_unnamed_addr #2 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 = { 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, !7, i64 0}
!6 = !{!"_ZTS8BVHAccel", !7, i64 0, !10, i64 8, !11, i64 12, !12, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!"_ZTSN8BVHAccel11SplitMethodE", !8, i64 0}
!12 = !{!"_ZTSSt6vectorIP5ShapeSaIS1_EE", !13, i64 0}
!13 = !{!"_ZTSSt12_Vector_baseIP5ShapeSaIS1_EE", !14, i64 0}
!14 = !{!"_ZTSNSt12_Vector_baseIP5ShapeSaIS1_EE12_Vector_implE", !15, i64 0}
!15 = !{!"_ZTSNSt12_Vector_baseIP5ShapeSaIS1_EE17_Vector_impl_dataE", !7, i64 0, !7, i64 8, !7, i64 16}


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