; LLVM IR from niessner/Matterport :: code/gaps/pkgs/RNBasics/RNArray.ll (ZNK8RNVArray9FindEntryEPKv)

; 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.RNVArray = type { ptr, i32, i32 }

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_ZNK8RNVArray9FindEntryEPKv(ptr noundef nonnull align 8 dereferenceable(16) %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
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %8 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %31, %2
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = getelementptr inbounds %class.RNVArray, ptr %8, i32 0, i32 2
  %12 = load i32, ptr %11, align 4, !tbaa !11
  %13 = icmp slt i32 %10, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %9
  store i32 2, ptr %7, align 4
  br label %34

15:                                               ; preds = %9
  %16 = getelementptr inbounds %class.RNVArray, ptr %8, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !13
  %18 = load i32, ptr %6, align 4, !tbaa !9
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds ptr, ptr %17, i64 %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 %30

24:                                               ; preds = %15
  %25 = getelementptr inbounds %class.RNVArray, ptr %8, i32 0, i32 0
  %26 = load ptr, ptr %25, align 8, !tbaa !13
  %27 = load i32, ptr %6, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds ptr, ptr %26, i64 %28
  store ptr %29, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %34

30:                                               ; preds = %15
  br label %31

31:                                               ; preds = %30
  %32 = load i32, ptr %6, align 4, !tbaa !9
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %6, align 4, !tbaa !9
  br label %9, !llvm.loop !14

34:                                               ; preds = %24, %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %35 = load i32, ptr %7, align 4
  switch i32 %35, label %39 [
    i32 2, label %36
    i32 1, label %37
  ]

36:                                               ; preds = %34
  store ptr null, ptr %3, align 8
  br label %37

37:                                               ; preds = %36, %34
  %38 = load ptr, ptr %3, align 8
  ret ptr %38

39:                                               ; preds = %34
  unreachable
}

; 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

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !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 12}
!12 = !{!"_ZTS8RNVArray", !6, i64 0, !10, i64 8, !10, i64 12}
!13 = !{!12, !6, i64 0}
!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 nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef ptr @_ZNK8RNVArray9FindEntryEPKv(ptr nocapture noundef nonnull readonly align 8 dereferenceable(16) %0, ptr noundef readnone %1) local_unnamed_addr #0 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 12
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %.not12 = icmp sgt i32 %4, 0
  br i1 %.not12, label %.lr.ph, label %.split.loop.exit9

.lr.ph:                                           ; preds = %2
  %5 = load ptr, ptr %0, align 8, !tbaa !11
  %wide.trip.count = zext nneg i32 %4 to i64
  br label %7

6:                                                ; preds = %7
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.split.loop.exit9, label %7, !llvm.loop !12

7:                                                ; preds = %.lr.ph, %6
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %6 ]
  %8 = getelementptr inbounds ptr, ptr %5, i64 %indvars.iv
  %9 = load ptr, ptr %8, align 8, !tbaa !14
  %10 = icmp eq ptr %9, %1
  br i1 %10, label %.split.loop.exit9.loopexit.split.loop.exit, label %6

.split.loop.exit9.loopexit.split.loop.exit:       ; preds = %7
  %11 = getelementptr inbounds ptr, ptr %5, i64 %indvars.iv
  br label %.split.loop.exit9

.split.loop.exit9:                                ; preds = %6, %.split.loop.exit9.loopexit.split.loop.exit, %2
  %spec.select = phi ptr [ null, %2 ], [ %11, %.split.loop.exit9.loopexit.split.loop.exit ], [ null, %6 ]
  ret ptr %spec.select
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) 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, !10, i64 12}
!6 = !{!"_ZTS8RNVArray", !7, i64 0, !10, i64 8, !10, i64 12}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!7, !7, i64 0}


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