; LLVM IR from Tian-Xie/NLS :: NestedLogitModel.ll (ZN16NestedLogitModel5ResetEv)

; 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.NestedLogitModel = type { i32, %"class.std::vector.0", double }
%"class.std::vector.0" = type { %"struct.std::_Vector_base.1" }
%"struct.std::_Vector_base.1" = type { %"struct.std::_Vector_base<TNest, std::allocator<TNest>>::_Vector_impl" }
%"struct.std::_Vector_base<TNest, std::allocator<TNest>>::_Vector_impl" = type { %"struct.std::_Vector_base<TNest, std::allocator<TNest>>::_Vector_impl_data" }
%"struct.std::_Vector_base<TNest, std::allocator<TNest>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN5TNest5ClearEv(ptr noundef nonnull align 8 dereferenceable(84)) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN16NestedLogitModel5ResetEv(ptr noundef nonnull align 8 dereferenceable(40) %0) #0 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %5

5:                                                ; preds = %17, %1
  %6 = load i32, ptr %3, align 4, !tbaa !9
  %7 = sext i32 %6 to i64
  %8 = getelementptr inbounds %struct.NestedLogitModel, ptr %4, i32 0, i32 1
  %9 = call noundef i64 @_ZNKSt6vectorI5TNestSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %8) #2
  %10 = icmp ult i64 %7, %9
  br i1 %10, label %12, label %11

11:                                               ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  br label %20

12:                                               ; preds = %5
  %13 = getelementptr inbounds %struct.NestedLogitModel, ptr %4, i32 0, i32 1
  %14 = load i32, ptr %3, align 4, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = call noundef nonnull align 8 dereferenceable(84) ptr @_ZNSt6vectorI5TNestSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %13, i64 noundef %15) #2
  call void @_ZN5TNest5ClearEv(ptr noundef nonnull align 8 dereferenceable(84) %16)
  br label %17

17:                                               ; preds = %12
  %18 = load i32, ptr %3, align 4, !tbaa !9
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %3, align 4, !tbaa !9
  br label %5, !llvm.loop !11

20:                                               ; preds = %11
  %21 = getelementptr inbounds %struct.NestedLogitModel, ptr %4, i32 0, i32 0
  store i32 0, ptr %21, align 8, !tbaa !13
  %22 = getelementptr inbounds %struct.NestedLogitModel, ptr %4, i32 0, i32 1
  call void @_ZNSt6vectorI5TNestSaIS0_EE5clearEv(ptr noundef nonnull align 8 dereferenceable(24) %22) #2
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorI5TNestSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(84) ptr @_ZNSt6vectorI5TNestSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorI5TNestSaIS0_EE5clearEv(ptr noundef nonnull align 8 dereferenceable(24)) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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"}
!13 = !{!14, !10, i64 0}
!14 = !{!"_ZTS16NestedLogitModel", !10, i64 0, !15, i64 8, !19, i64 32}
!15 = !{!"_ZTSSt6vectorI5TNestSaIS0_EE", !16, i64 0}
!16 = !{!"_ZTSSt12_Vector_baseI5TNestSaIS0_EE", !17, i64 0}
!17 = !{!"_ZTSNSt12_Vector_baseI5TNestSaIS0_EE12_Vector_implE", !18, i64 0}
!18 = !{!"_ZTSNSt12_Vector_baseI5TNestSaIS0_EE17_Vector_impl_dataE", !6, i64 0, !6, i64 8, !6, i64 16}
!19 = !{!"double", !7, i64 0}


; 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 void @_ZN5TNest5ClearEv(ptr noundef nonnull align 8 dereferenceable(84)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN16NestedLogitModel5ResetEv(ptr noundef nonnull align 8 dereferenceable(40) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  %3 = tail call noundef i64 @_ZNKSt6vectorI5TNestSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %2) #1
  %.not = icmp eq i64 %3, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %1
  store i32 0, ptr %0, align 8, !tbaa !5
  tail call void @_ZNSt6vectorI5TNestSaIS0_EE5clearEv(ptr noundef nonnull align 8 dereferenceable(24) %2) #1
  ret void

.lr.ph:                                           ; preds = %1, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %1 ]
  %4 = tail call noundef nonnull align 8 dereferenceable(84) ptr @_ZNSt6vectorI5TNestSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef %indvars.iv) #1
  tail call void @_ZN5TNest5ClearEv(ptr noundef nonnull align 8 dereferenceable(84) %4)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %5 = tail call noundef i64 @_ZNKSt6vectorI5TNestSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %2) #1
  %6 = icmp ugt i64 %5, %indvars.iv.next
  br i1 %6, label %.lr.ph, label %._crit_edge, !llvm.loop !16
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorI5TNestSaIS0_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 8 dereferenceable(84) ptr @_ZNSt6vectorI5TNestSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorI5TNestSaIS0_EE5clearEv(ptr noundef nonnull align 8 dereferenceable(24)) 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 = { 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 = !{!"_ZTS16NestedLogitModel", !7, i64 0, !10, i64 8, !15, i64 32}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"_ZTSSt6vectorI5TNestSaIS0_EE", !11, i64 0}
!11 = !{!"_ZTSSt12_Vector_baseI5TNestSaIS0_EE", !12, i64 0}
!12 = !{!"_ZTSNSt12_Vector_baseI5TNestSaIS0_EE12_Vector_implE", !13, i64 0}
!13 = !{!"_ZTSNSt12_Vector_baseI5TNestSaIS0_EE17_Vector_impl_dataE", !14, i64 0, !14, i64 8, !14, i64 16}
!14 = !{!"any pointer", !8, i64 0}
!15 = !{!"double", !8, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}


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