; LLVM IR from niessner/Matterport :: code/gaps/pkgs/RNBasics/RNQueue.ll (ZNK8RNVQueue9FindEntryEPKv)

; 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.RNVQueue = type { %class.RNVArray, i32, i32 }
%class.RNVArray = type { ptr, i32, i32 }

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZNK8RNVQueue9FindEntryEPKv(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef %1) #0 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %9 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %30, %2
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = getelementptr inbounds %class.RNVQueue, ptr %9, i32 0, i32 1
  %13 = load i32, ptr %12, align 8, !tbaa !11
  %14 = icmp slt i32 %11, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %10
  store i32 2, ptr %7, align 4
  br label %33

16:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %17 = load i32, ptr %6, align 4, !tbaa !9
  %18 = call noundef ptr @_ZNK8RNVQueue8KthEntryEi(ptr noundef nonnull align 8 dereferenceable(24) %9, i32 noundef %17)
  store ptr %18, ptr %8, align 8, !tbaa !5
  %19 = load ptr, ptr %8, align 8, !tbaa !5
  %20 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK8RNVQueue13EntryContentsEPPv(ptr noundef nonnull align 8 dereferenceable(24) %9, ptr noundef %19)
  %21 = load ptr, ptr %20, align 8, !tbaa !5
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = icmp eq ptr %21, %22
  br i1 %23, label %24, label %26

24:                                               ; preds = %16
  %25 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %25, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %27

26:                                               ; preds = %16
  store i32 0, ptr %7, align 4
  br label %27

27:                                               ; preds = %26, %24
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  %28 = load i32, ptr %7, align 4
  switch i32 %28, label %33 [
    i32 0, label %29
  ]

29:                                               ; preds = %27
  br label %30

30:                                               ; preds = %29
  %31 = load i32, ptr %6, align 4, !tbaa !9
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %6, align 4, !tbaa !9
  br label %10, !llvm.loop !14

33:                                               ; preds = %27, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  %34 = load i32, ptr %7, align 4
  switch i32 %34, label %38 [
    i32 2, label %35
    i32 1, label %36
  ]

35:                                               ; preds = %33
  store ptr null, ptr %3, align 8
  br label %36

36:                                               ; preds = %35, %33
  %37 = load ptr, ptr %3, align 8
  ret ptr %37

38:                                               ; preds = %33
  unreachable
}

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

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef ptr @_ZNK8RNVQueue8KthEntryEi(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef) #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNK8RNVQueue13EntryContentsEPPv(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef) #3 align 2

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

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 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 = { 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 #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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 16}
!12 = !{!"_ZTS8RNVQueue", !13, i64 0, !10, i64 16, !10, i64 20}
!13 = !{!"_ZTS8RNVArray", !6, i64 0, !10, i64 8, !10, i64 12}
!14 = distinct !{!14, !15}
!15 = !{!"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
define dso_local noundef ptr @_ZNK8RNVQueue9FindEntryEPKv(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef readnone %1) local_unnamed_addr #0 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 16
  %4 = load i32, ptr %3, align 8, !tbaa !5
  %.not1213 = icmp sgt i32 %4, 0
  br i1 %.not1213, label %.lr.ph, label %._crit_edge

5:                                                ; preds = %.lr.ph
  %6 = add nuw nsw i32 %.01114, 1
  %7 = load i32, ptr %3, align 8, !tbaa !5
  %.not12 = icmp slt i32 %6, %7
  br i1 %.not12, label %.lr.ph, label %._crit_edge, !llvm.loop !12

.lr.ph:                                           ; preds = %2, %5
  %.01114 = phi i32 [ %6, %5 ], [ 0, %2 ]
  %8 = tail call noundef ptr @_ZNK8RNVQueue8KthEntryEi(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %.01114)
  %9 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNK8RNVQueue13EntryContentsEPPv(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef %8)
  %10 = load ptr, ptr %9, align 8, !tbaa !14
  %.not = icmp eq ptr %10, %1
  br i1 %.not, label %._crit_edge, label %5

._crit_edge:                                      ; preds = %.lr.ph, %5, %2
  %spec.select = phi ptr [ null, %2 ], [ null, %5 ], [ %8, %.lr.ph ]
  ret ptr %spec.select
}

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef ptr @_ZNK8RNVQueue8KthEntryEi(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNK8RNVQueue13EntryContentsEPPv(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef) local_unnamed_addr #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 = { inlinehint 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 #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" }

!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, !11, i64 16}
!6 = !{!"_ZTS8RNVQueue", !7, i64 0, !11, i64 16, !11, i64 20}
!7 = !{!"_ZTS8RNVArray", !8, i64 0, !11, i64 8, !11, i64 12}
!8 = !{!"any pointer", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = !{!"int", !9, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!8, !8, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass