; LLVM IR from Tian-Xie/NLS :: NestCandidateGenerator.ll (ZN16NestedLogitModel23GenerateAllCandidateSetEv)

; 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.2", double }
%"class.std::vector.2" = type { %"struct.std::_Vector_base.3" }
%"struct.std::_Vector_base.3" = 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 uwtable
declare dso_local void @_ZN5TNest20GenerateCandidateSetEv(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 uwtable
define dso_local void @_ZN16NestedLogitModel23GenerateAllCandidateSetEv(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) #3
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %5

5:                                                ; preds = %16, %1
  %6 = load i32, ptr %3, align 4, !tbaa !9
  %7 = getelementptr inbounds %struct.NestedLogitModel, ptr %4, i32 0, i32 0
  %8 = load i32, ptr %7, align 8, !tbaa !11
  %9 = icmp slt i32 %6, %8
  br i1 %9, label %11, label %10

10:                                               ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %19

11:                                               ; preds = %5
  %12 = getelementptr inbounds %struct.NestedLogitModel, ptr %4, i32 0, i32 1
  %13 = load i32, ptr %3, align 4, !tbaa !9
  %14 = sext i32 %13 to i64
  %15 = call noundef nonnull align 8 dereferenceable(84) ptr @_ZNSt6vectorI5TNestSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %12, i64 noundef %14) #3
  call void @_ZN5TNest20GenerateCandidateSetEv(ptr noundef nonnull align 8 dereferenceable(84) %15)
  br label %16

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

19:                                               ; preds = %10
  ret void
}

; 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) #2 align 2

attributes #0 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"_ZTS16NestedLogitModel", !10, i64 0, !13, i64 8, !17, i64 32}
!13 = !{!"_ZTSSt6vectorI5TNestSaIS0_EE", !14, i64 0}
!14 = !{!"_ZTSSt12_Vector_baseI5TNestSaIS0_EE", !15, i64 0}
!15 = !{!"_ZTSNSt12_Vector_baseI5TNestSaIS0_EE12_Vector_implE", !16, i64 0}
!16 = !{!"_ZTSNSt12_Vector_baseI5TNestSaIS0_EE17_Vector_impl_dataE", !6, i64 0, !6, i64 8, !6, i64 16}
!17 = !{!"double", !7, i64 0}
!18 = distinct !{!18, !19}
!19 = !{!"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 uwtable
declare dso_local void @_ZN5TNest20GenerateCandidateSetEv(ptr noundef nonnull align 8 dereferenceable(84)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN16NestedLogitModel23GenerateAllCandidateSetEv(ptr noundef nonnull align 8 dereferenceable(40) %0) local_unnamed_addr #0 align 2 {
  %2 = load i32, ptr %0, align 8, !tbaa !5
  %3 = icmp sgt i32 %2, 0
  br i1 %3, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  br label %5

._crit_edge:                                      ; preds = %5, %1
  ret void

5:                                                ; preds = %.lr.ph, %5
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %5 ]
  %6 = tail call noundef nonnull align 8 dereferenceable(84) ptr @_ZNSt6vectorI5TNestSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %indvars.iv) #2
  tail call void @_ZN5TNest20GenerateCandidateSetEv(ptr noundef nonnull align 8 dereferenceable(84) %6)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %7 = load i32, ptr %0, align 8, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = icmp slt i64 %indvars.iv.next, %8
  br i1 %9, label %5, label %._crit_edge, !llvm.loop !16
}

; 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 #1 align 2

attributes #0 = { 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 = { 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 = { 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,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass