; LLVM IR from turi-code/SFrame :: oss_src/graphlab/util/inplace_lf_queue.ll (ZN8graphlab16inplace_lf_queue11dequeue_allEv)

; 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"

%"class.graphlab::inplace_lf_queue" = type { [8 x i8], ptr, ptr, [40 x i8] }

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN8graphlab16inplace_lf_queue7enqueueEPc(ptr noundef nonnull align 8 dereferenceable(64), ptr noundef) #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 noundef ptr @_ZN8graphlab16inplace_lf_queue11dequeue_allEv(ptr noundef nonnull align 8 dereferenceable(64) %0) #0 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %7 = getelementptr inbounds %"class.graphlab::inplace_lf_queue", ptr %6, i32 0, i32 1
  %8 = load ptr, ptr %7, align 8, !tbaa !9
  %9 = call noundef ptr @_ZN8graphlab16inplace_lf_queue8get_nextEPc(ptr noundef %8)
  store ptr %9, ptr %4, align 8, !tbaa !5
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = icmp eq ptr %10, null
  br i1 %11, label %12, label %13

12:                                               ; preds = %1
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %17

13:                                               ; preds = %1
  %14 = getelementptr inbounds %"class.graphlab::inplace_lf_queue", ptr %6, i32 0, i32 0
  %15 = getelementptr inbounds [8 x i8], ptr %14, i64 0, i64 0
  call void @_ZN8graphlab16inplace_lf_queue7enqueueEPc(ptr noundef nonnull align 8 dereferenceable(64) %6, ptr noundef %15)
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %16, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %17

17:                                               ; preds = %13, %12
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %18 = load ptr, ptr %2, align 8
  ret ptr %18
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN8graphlab16inplace_lf_queue8get_nextEPc(ptr 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 = { 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 8}
!10 = !{!"_ZTSN8graphlab16inplace_lf_queueE", !7, i64 0, !6, i64 8, !6, i64 16, !7, i64 24}


; 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 @_ZN8graphlab16inplace_lf_queue7enqueueEPc(ptr noundef nonnull align 8 dereferenceable(64), ptr noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZN8graphlab16inplace_lf_queue11dequeue_allEv(ptr noundef nonnull align 8 dereferenceable(64) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = tail call noundef ptr @_ZN8graphlab16inplace_lf_queue8get_nextEPc(ptr noundef %3)
  %5 = icmp eq ptr %4, null
  br i1 %5, label %7, label %6

6:                                                ; preds = %1
  tail call void @_ZN8graphlab16inplace_lf_queue7enqueueEPc(ptr noundef nonnull align 8 dereferenceable(64) %0, ptr noundef nonnull %0)
  br label %7

7:                                                ; preds = %1, %6
  ret ptr %4
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN8graphlab16inplace_lf_queue8get_nextEPc(ptr 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 = { 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" }

!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, !9, i64 8}
!6 = !{!"_ZTSN8graphlab16inplace_lf_queueE", !7, i64 0, !9, i64 8, !9, i64 16, !7, i64 24}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!"any pointer", !7, i64 0}


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