; LLVM IR from niessner/Matterport :: code/gaps/pkgs/RGBD/RGBDConfiguration.ll (ZN17RGBDConfiguration12ReadChannelsEv)

; 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"

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef i32 @_ZNK17RGBDConfiguration7NImagesEv(ptr noundef nonnull align 8 dereferenceable(128)) #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef ptr @_ZNK17RGBDConfiguration5ImageEi(ptr noundef nonnull align 8 dereferenceable(128), i32 noundef) #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef i32 @_ZNK17RGBDConfiguration9NSurfacesEv(ptr noundef nonnull align 8 dereferenceable(128)) #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef ptr @_ZNK17RGBDConfiguration7SurfaceEi(ptr noundef nonnull align 8 dereferenceable(128), i32 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 i32 @_ZN17RGBDConfiguration12ReadChannelsEv(ptr noundef nonnull align 8 dereferenceable(128) %0) unnamed_addr #2 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %7 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %21, %1
  %9 = load i32, ptr %3, align 4, !tbaa !9
  %10 = call noundef i32 @_ZNK17RGBDConfiguration7NImagesEv(ptr noundef nonnull align 8 dereferenceable(128) %7)
  %11 = icmp slt i32 %9, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %24

13:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %14 = load i32, ptr %3, align 4, !tbaa !9
  %15 = call noundef ptr @_ZNK17RGBDConfiguration5ImageEi(ptr noundef nonnull align 8 dereferenceable(128) %7, i32 noundef %14)
  store ptr %15, ptr %4, align 8, !tbaa !5
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = load ptr, ptr %16, align 8, !tbaa !11
  %18 = getelementptr inbounds ptr, ptr %17, i64 24
  %19 = load ptr, ptr %18, align 8
  %20 = call noundef i32 %19(ptr noundef nonnull align 8 dereferenceable(488) %16)
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %21

21:                                               ; preds = %13
  %22 = load i32, ptr %3, align 4, !tbaa !9
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %3, align 4, !tbaa !9
  br label %8, !llvm.loop !13

24:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %25

25:                                               ; preds = %38, %24
  %26 = load i32, ptr %5, align 4, !tbaa !9
  %27 = call noundef i32 @_ZNK17RGBDConfiguration9NSurfacesEv(ptr noundef nonnull align 8 dereferenceable(128) %7)
  %28 = icmp slt i32 %26, %27
  br i1 %28, label %30, label %29

29:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %41

30:                                               ; preds = %25
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %31 = load i32, ptr %5, align 4, !tbaa !9
  %32 = call noundef ptr @_ZNK17RGBDConfiguration7SurfaceEi(ptr noundef nonnull align 8 dereferenceable(128) %7, i32 noundef %31)
  store ptr %32, ptr %6, align 8, !tbaa !5
  %33 = load ptr, ptr %6, align 8, !tbaa !5
  %34 = load ptr, ptr %33, align 8, !tbaa !11
  %35 = getelementptr inbounds ptr, ptr %34, i64 16
  %36 = load ptr, ptr %35, align 8
  %37 = call noundef i32 %36(ptr noundef nonnull align 8 dereferenceable(144) %33)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %38

38:                                               ; preds = %30
  %39 = load i32, ptr %5, align 4, !tbaa !9
  %40 = add nsw i32 %39, 1
  store i32 %40, ptr %5, align 4, !tbaa !9
  br label %25, !llvm.loop !15

41:                                               ; preds = %29
  ret i32 1
}

attributes #0 = { 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 #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, !12, i64 0}
!12 = !{!"vtable pointer", !8, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


; 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 uwtable
declare dso_local noundef i32 @_ZNK17RGBDConfiguration7NImagesEv(ptr noundef nonnull align 8 dereferenceable(128)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef ptr @_ZNK17RGBDConfiguration5ImageEi(ptr noundef nonnull align 8 dereferenceable(128), i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef i32 @_ZNK17RGBDConfiguration9NSurfacesEv(ptr noundef nonnull align 8 dereferenceable(128)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef ptr @_ZNK17RGBDConfiguration7SurfaceEi(ptr noundef nonnull align 8 dereferenceable(128), i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN17RGBDConfiguration12ReadChannelsEv(ptr noundef nonnull align 8 dereferenceable(128) %0) unnamed_addr #1 align 2 {
  %2 = tail call noundef i32 @_ZNK17RGBDConfiguration7NImagesEv(ptr noundef nonnull align 8 dereferenceable(128) %0)
  %3 = icmp sgt i32 %2, 0
  br i1 %3, label %.lr.ph, label %.preheader

.preheader:                                       ; preds = %.lr.ph, %1
  %4 = tail call noundef i32 @_ZNK17RGBDConfiguration9NSurfacesEv(ptr noundef nonnull align 8 dereferenceable(128) %0)
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph11, label %._crit_edge

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.09 = phi i32 [ %11, %.lr.ph ], [ 0, %1 ]
  %6 = tail call noundef ptr @_ZNK17RGBDConfiguration5ImageEi(ptr noundef nonnull align 8 dereferenceable(128) %0, i32 noundef %.09)
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %7, i64 192
  %9 = load ptr, ptr %8, align 8
  %10 = tail call noundef i32 %9(ptr noundef nonnull align 8 dereferenceable(488) %6)
  %11 = add nuw nsw i32 %.09, 1
  %12 = tail call noundef i32 @_ZNK17RGBDConfiguration7NImagesEv(ptr noundef nonnull align 8 dereferenceable(128) %0)
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %.lr.ph, label %.preheader, !llvm.loop !8

._crit_edge:                                      ; preds = %.lr.ph11, %.preheader
  ret i32 1

.lr.ph11:                                         ; preds = %.preheader, %.lr.ph11
  %.0810 = phi i32 [ %19, %.lr.ph11 ], [ 0, %.preheader ]
  %14 = tail call noundef ptr @_ZNK17RGBDConfiguration7SurfaceEi(ptr noundef nonnull align 8 dereferenceable(128) %0, i32 noundef %.0810)
  %15 = load ptr, ptr %14, align 8, !tbaa !5
  %16 = getelementptr inbounds i8, ptr %15, i64 128
  %17 = load ptr, ptr %16, align 8
  %18 = tail call noundef i32 %17(ptr noundef nonnull align 8 dereferenceable(144) %14)
  %19 = add nuw nsw i32 %.0810, 1
  %20 = tail call noundef i32 @_ZNK17RGBDConfiguration9NSurfacesEv(ptr noundef nonnull align 8 dereferenceable(128) %0)
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %.lr.ph11, label %._crit_edge, !llvm.loop !10
}

attributes #0 = { 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 #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 = !{!6, !6, i64 0}
!6 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}
!10 = distinct !{!10, !9}


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