; LLVM IR from buresjan/optim_lbm :: nomad/src/Algos/Step.ll (ZNK9NOMAD_4_34Step13isAnAlgorithmEv)

; 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
define dso_local noundef zeroext i1 @_ZNK9NOMAD_4_34Step13isAnAlgorithmEv(ptr noundef nonnull align 8 dereferenceable(140) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  store ptr %4, ptr %3, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = icmp eq ptr %5, null
  br i1 %6, label %9, label %7

7:                                                ; preds = %1
  %8 = call ptr @__dynamic_cast(ptr %5, ptr @_ZTIN9NOMAD_4_34StepE, ptr @_ZTIN9NOMAD_4_39AlgorithmE, i64 0) #3
  br label %10

9:                                                ; preds = %1
  br label %10

10:                                               ; preds = %9, %7
  %11 = phi ptr [ %8, %7 ], [ null, %9 ]
  %12 = icmp ne ptr null, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  ret i1 %12
}

; Function Attrs: nounwind willreturn memory(read)
declare ptr @__dynamic_cast(ptr, ptr, ptr, i64) #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 = { 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"}


; 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 nofree nounwind willreturn memory(read) uwtable
define dso_local noundef zeroext i1 @_ZNK9NOMAD_4_34Step13isAnAlgorithmEv(ptr noundef nonnull readonly align 8 dereferenceable(140) %0) local_unnamed_addr #0 align 2 {
  %2 = tail call ptr @__dynamic_cast(ptr nonnull %0, ptr nonnull @_ZTIN9NOMAD_4_34StepE, ptr nonnull @_ZTIN9NOMAD_4_39AlgorithmE, i64 0) #2
  %3 = icmp ne ptr %2, null
  ret i1 %3
}

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

attributes #0 = { mustprogress nofree nounwind willreturn memory(read) 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)"}


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