; LLVM IR from niessner/Matterport :: code/gaps/apps/mpview/mp.ll (ZNK7MPHouse11FindSegmentEi)

; 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"

%struct.MPHouse = type { %class.RNArray.0, %class.RNArray.1, %class.RNArray.2, %class.RNArray.3, %class.RNArray.4, %class.RNArray.5, %class.RNArray.6, %class.RNArray.7, %class.RNArray.8, %class.RNArray.9, %class.RGBDConfiguration, ptr, ptr, %class.R3Box, ptr, ptr }
%class.RNArray.0 = type { %class.RNVArray }
%class.RNVArray = type { ptr, i32, i32 }
%class.RNArray.1 = type { %class.RNVArray }
%class.RNArray.2 = type { %class.RNVArray }
%class.RNArray.3 = type { %class.RNVArray }
%class.RNArray.4 = type { %class.RNVArray }
%class.RNArray.5 = type { %class.RNVArray }
%class.RNArray.6 = type { %class.RNVArray }
%class.RNArray.7 = type { %class.RNVArray }
%class.RNArray.8 = type { %class.RNVArray }
%class.RNArray.9 = type { %class.RNVArray }
%class.RGBDConfiguration = type { ptr, %class.RNArray.10, %class.RNArray.11, ptr, ptr, ptr, ptr, %class.R3Box }
%class.RNArray.10 = type { %class.RNVArray }
%class.RNArray.11 = type { %class.RNVArray }
%class.R3Box = type { %class.R3Solid, %class.R3Point, %class.R3Point }
%class.R3Solid = type { %class.R3Shape }
%class.R3Shape = type { ptr }
%class.R3Point = type { [3 x double] }
%struct.MPSegment = type <{ ptr, i32, [4 x i8], ptr, i32, [4 x i8], ptr, %class.RNArray.12, double, %class.R3Point, %class.R3Box, i32, [4 x i8] }>
%class.RNArray.12 = type { %class.RNVArray }

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK8RNVArray8NEntriesEv(ptr noundef nonnull align 8 dereferenceable(16)) #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
declare dso_local noundef ptr @_ZNK7RNArrayIP9MPSegmentE3KthEi(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZNK7MPHouse11FindSegmentEi(ptr noundef nonnull align 8 dereferenceable(376) %0, i32 noundef %1) #2 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %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 i32 %1, ptr %5, align 4, !tbaa !9
  %9 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %31, %2
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = getelementptr inbounds %struct.MPHouse, ptr %9, i32 0, i32 3
  %13 = call noundef i32 @_ZNK8RNVArray8NEntriesEv(ptr noundef nonnull align 8 dereferenceable(16) %12)
  %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 %34

16:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %17 = getelementptr inbounds %struct.MPHouse, ptr %9, i32 0, i32 3
  %18 = load i32, ptr %6, align 4, !tbaa !9
  %19 = call noundef ptr @_ZNK7RNArrayIP9MPSegmentE3KthEi(ptr noundef nonnull align 8 dereferenceable(16) %17, i32 noundef %18)
  store ptr %19, ptr %8, align 8, !tbaa !5
  %20 = load ptr, ptr %8, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.MPSegment, ptr %20, i32 0, i32 11
  %22 = load i32, ptr %21, align 8, !tbaa !11
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = icmp eq i32 %22, %23
  br i1 %24, label %25, label %27

25:                                               ; preds = %16
  %26 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %26, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %28

27:                                               ; preds = %16
  store i32 0, ptr %7, align 4
  br label %28

28:                                               ; preds = %27, %25
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %29 = load i32, ptr %7, align 4
  switch i32 %29, label %34 [
    i32 0, label %30
  ]

30:                                               ; preds = %28
  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 %10, !llvm.loop !20

34:                                               ; preds = %28, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %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
}

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 = { 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 144}
!12 = !{!"_ZTS9MPSegment", !6, i64 0, !10, i64 8, !6, i64 16, !10, i64 24, !6, i64 32, !13, i64 40, !15, i64 56, !16, i64 64, !17, i64 88, !10, i64 144}
!13 = !{!"_ZTS7RNArrayIP10R3MeshFaceE", !14, i64 0}
!14 = !{!"_ZTS8RNVArray", !6, i64 0, !10, i64 8, !10, i64 12}
!15 = !{!"double", !7, i64 0}
!16 = !{!"_ZTS7R3Point", !7, i64 0}
!17 = !{!"_ZTS5R3Box", !18, i64 0, !16, i64 8, !16, i64 32}
!18 = !{!"_ZTS7R3Solid", !19, i64 0}
!19 = !{!"_ZTS7R3Shape"}
!20 = distinct !{!20, !21}
!21 = !{!"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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK8RNVArray8NEntriesEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZNK7RNArrayIP9MPSegmentE3KthEi(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZNK7MPHouse11FindSegmentEi(ptr noundef nonnull align 8 dereferenceable(376) %0, i32 noundef %1) local_unnamed_addr #1 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 48
  %4 = tail call noundef i32 @_ZNK8RNVArray8NEntriesEv(ptr noundef nonnull align 8 dereferenceable(16) %3)
  %.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 = tail call noundef i32 @_ZNK8RNVArray8NEntriesEv(ptr noundef nonnull align 8 dereferenceable(16) %3)
  %.not12 = icmp slt i32 %6, %7
  br i1 %.not12, label %.lr.ph, label %._crit_edge, !llvm.loop !5

.lr.ph:                                           ; preds = %2, %5
  %.01114 = phi i32 [ %6, %5 ], [ 0, %2 ]
  %8 = tail call noundef ptr @_ZNK7RNArrayIP9MPSegmentE3KthEi(ptr noundef nonnull align 8 dereferenceable(16) %3, i32 noundef %.01114)
  %9 = getelementptr inbounds i8, ptr %8, i64 144
  %10 = load i32, ptr %9, align 8, !tbaa !7
  %.not = icmp eq i32 %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
}

attributes #0 = { 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 #1 = { 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" }

!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"}
!7 = !{!8, !12, i64 144}
!8 = !{!"_ZTS9MPSegment", !9, i64 0, !12, i64 8, !9, i64 16, !12, i64 24, !9, i64 32, !13, i64 40, !15, i64 56, !16, i64 64, !17, i64 88, !12, i64 144}
!9 = !{!"any pointer", !10, i64 0}
!10 = !{!"omnipotent char", !11, i64 0}
!11 = !{!"Simple C++ TBAA"}
!12 = !{!"int", !10, i64 0}
!13 = !{!"_ZTS7RNArrayIP10R3MeshFaceE", !14, i64 0}
!14 = !{!"_ZTS8RNVArray", !9, i64 0, !12, i64 8, !12, i64 12}
!15 = !{!"double", !10, i64 0}
!16 = !{!"_ZTS7R3Point", !10, i64 0}
!17 = !{!"_ZTS5R3Box", !18, i64 0, !16, i64 8, !16, i64 32}
!18 = !{!"_ZTS7R3Solid", !19, i64 0}
!19 = !{!"_ZTS7R3Shape"}


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