; LLVM IR from buresjan/optim_lbm :: nomad/src/Algos/Step.ll (ZNK9NOMAD_4_34Step16getRootAlgorithmEv)

; 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"

@_ZTIN9NOMAD_4_34StepE = external dso_local constant { ptr, ptr }, align 8
@_ZTIN9NOMAD_4_39AlgorithmE = external constant 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 nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNK9NOMAD_4_34Step13isAnAlgorithmEv(ptr noundef nonnull align 8 dereferenceable(140)) #1 align 2

; Function Attrs: nounwind willreturn memory(read)
declare ptr @__dynamic_cast(ptr, ptr, ptr, i64) #2

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZNK9NOMAD_4_34Step16getRootAlgorithmEv(ptr noundef nonnull align 8 dereferenceable(140) %0) #3 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %6 = call noundef zeroext i1 @_ZNK9NOMAD_4_34Step13isAnAlgorithmEv(ptr noundef nonnull align 8 dereferenceable(140) %5)
  br i1 %6, label %7, label %14

7:                                                ; preds = %1
  %8 = icmp eq ptr %5, null
  br i1 %8, label %11, label %9

9:                                                ; preds = %7
  %10 = call ptr @__dynamic_cast(ptr %5, ptr @_ZTIN9NOMAD_4_34StepE, ptr @_ZTIN9NOMAD_4_39AlgorithmE, i64 0) #4
  br label %12

11:                                               ; preds = %7
  br label %12

12:                                               ; preds = %11, %9
  %13 = phi ptr [ %10, %9 ], [ null, %11 ]
  br label %16

14:                                               ; preds = %1
  %15 = call noundef ptr @_ZNK9NOMAD_4_34Step15getParentOfTypeIPNS_9AlgorithmEEET_b(ptr noundef nonnull align 8 dereferenceable(140) %5, i1 noundef zeroext true)
  br label %16

16:                                               ; preds = %14, %12
  %17 = phi ptr [ %13, %12 ], [ %15, %14 ]
  store ptr %17, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = call noundef ptr @_ZNK9NOMAD_4_34Step15getParentOfTypeIPNS_9AlgorithmEEET_b(ptr noundef nonnull align 8 dereferenceable(140) %18, i1 noundef zeroext true)
  store ptr %19, ptr %4, align 8, !tbaa !5
  br label %20

20:                                               ; preds = %23, %16
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = icmp ne ptr null, %21
  br i1 %22, label %23, label %27

23:                                               ; preds = %20
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %24, ptr %3, align 8, !tbaa !5
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = call noundef ptr @_ZNK9NOMAD_4_34Step15getParentOfTypeIPNS_9AlgorithmEEET_b(ptr noundef nonnull align 8 dereferenceable(140) %25, i1 noundef zeroext true)
  store ptr %26, ptr %4, align 8, !tbaa !5
  br label %20, !llvm.loop !9

27:                                               ; preds = %20
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  ret ptr %28
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK9NOMAD_4_34Step15getParentOfTypeIPNS_9AlgorithmEEET_b(ptr noundef nonnull align 8 dereferenceable(140), i1 noundef zeroext) #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 willreturn memory(read) }
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 = distinct !{!9, !10}
!10 = !{!"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"

@_ZTIN9NOMAD_4_34StepE = external dso_local constant { ptr, ptr }, align 8
@_ZTIN9NOMAD_4_39AlgorithmE = external constant ptr

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZNK9NOMAD_4_34Step13isAnAlgorithmEv(ptr noundef nonnull align 8 dereferenceable(140)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nofree nounwind willreturn memory(read)
declare ptr @__dynamic_cast(ptr, ptr, ptr, i64) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_ZNK9NOMAD_4_34Step16getRootAlgorithmEv(ptr noundef nonnull align 8 dereferenceable(140) %0) local_unnamed_addr #0 align 2 {
  %2 = tail call noundef zeroext i1 @_ZNK9NOMAD_4_34Step13isAnAlgorithmEv(ptr noundef nonnull align 8 dereferenceable(140) %0)
  br i1 %2, label %3, label %5

3:                                                ; preds = %1
  %4 = tail call ptr @__dynamic_cast(ptr nonnull %0, ptr nonnull @_ZTIN9NOMAD_4_34StepE, ptr nonnull @_ZTIN9NOMAD_4_39AlgorithmE, i64 0) #2
  br label %7

5:                                                ; preds = %1
  %6 = tail call noundef ptr @_ZNK9NOMAD_4_34Step15getParentOfTypeIPNS_9AlgorithmEEET_b(ptr noundef nonnull align 8 dereferenceable(140) %0, i1 noundef zeroext true)
  br label %7

7:                                                ; preds = %3, %5
  %8 = phi ptr [ %6, %5 ], [ %4, %3 ]
  %9 = tail call noundef ptr @_ZNK9NOMAD_4_34Step15getParentOfTypeIPNS_9AlgorithmEEET_b(ptr noundef nonnull align 8 dereferenceable(140) %8, i1 noundef zeroext true)
  %.not7 = icmp eq ptr %9, null
  br i1 %.not7, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %7, %.lr.ph
  %.08 = phi ptr [ %10, %.lr.ph ], [ %9, %7 ]
  %10 = tail call noundef ptr @_ZNK9NOMAD_4_34Step15getParentOfTypeIPNS_9AlgorithmEEET_b(ptr noundef nonnull align 8 dereferenceable(140) %.08, i1 noundef zeroext true)
  %.not = icmp eq ptr %10, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %7
  %.06.lcssa = phi ptr [ %8, %7 ], [ %.08, %.lr.ph ]
  ret ptr %.06.lcssa
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK9NOMAD_4_34Step15getParentOfTypeIPNS_9AlgorithmEEET_b(ptr noundef nonnull align 8 dereferenceable(140), i1 noundef zeroext) 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 nofree nounwind willreturn memory(read) }
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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass