; LLVM IR from niessner/Matterport :: code/gaps/pkgs/R3Shapes/R3Draw.ll (ZNK15R3TriangleArray4DrawE7RNFlags)

; 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.RNFlags = type { i64 }
%class.R3TriangleArray = type { %class.R3Surface, %class.RNArray, %class.RNArray.0, %class.R3Box }
%class.R3Surface = type { %class.R3Shape }
%class.R3Shape = type { ptr }
%class.RNArray = type { %class.RNVArray }
%class.RNVArray = type { ptr, i32, i32 }
%class.RNArray.0 = type { %class.RNVArray }
%class.R3Box = type { %class.R3Solid, %class.R3Point, %class.R3Point }
%class.R3Solid = type { %class.R3Shape }
%class.R3Point = type { [3 x double] }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_ZNK15R3TriangleArray4DrawE7RNFlags(ptr noundef nonnull align 8 dereferenceable(96) %0, i64 %1) unnamed_addr #1 align 2 {
  %3 = alloca %class.RNFlags, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca %class.RNFlags, align 8
  %7 = getelementptr inbounds %class.RNFlags, ptr %3, i32 0, i32 0
  store i64 %1, ptr %7, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  %8 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %24, %2
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = getelementptr inbounds %class.R3TriangleArray, ptr %8, i32 0, i32 2
  %12 = call noundef i32 @_ZNK8RNVArray8NEntriesEv(ptr noundef nonnull align 8 dereferenceable(16) %11)
  %13 = icmp slt i32 %10, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %27

15:                                               ; preds = %9
  %16 = getelementptr inbounds %class.R3TriangleArray, ptr %8, i32 0, i32 2
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = call noundef ptr @_ZNK7RNArrayIP10R3TriangleE3KthEi(ptr noundef nonnull align 8 dereferenceable(16) %16, i32 noundef %17)
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %6, ptr align 8 %3, i64 8, i1 false), !tbaa.struct !11
  %19 = getelementptr inbounds %class.RNFlags, ptr %6, i32 0, i32 0
  %20 = load i64, ptr %19, align 8
  %21 = load ptr, ptr %18, align 8, !tbaa !14
  %22 = getelementptr inbounds ptr, ptr %21, i64 21
  %23 = load ptr, ptr %22, align 8
  call void %23(ptr noundef nonnull align 8 dereferenceable(132) %18, i64 %20)
  br label %24

24:                                               ; preds = %15
  %25 = load i32, ptr %5, align 4, !tbaa !9
  %26 = add nsw i32 %25, 1
  store i32 %26, ptr %5, align 4, !tbaa !9
  br label %9, !llvm.loop !16

27:                                               ; preds = %14
  ret void
}

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZNK7RNArrayIP10R3TriangleE3KthEi(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) #1 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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" }
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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = !{i64 0, i64 8, !12}
!12 = !{!13, !13, i64 0}
!13 = !{!"long", !7, i64 0}
!14 = !{!15, !15, i64 0}
!15 = !{!"vtable pointer", !8, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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 void @_ZNK15R3TriangleArray4DrawE7RNFlags(ptr noundef nonnull align 8 dereferenceable(96) %0, i64 %1) unnamed_addr #0 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 24
  %4 = tail call noundef i32 @_ZNK8RNVArray8NEntriesEv(ptr noundef nonnull align 8 dereferenceable(16) %3)
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  ret void

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.04 = phi i32 [ %10, %.lr.ph ], [ 0, %2 ]
  %6 = tail call noundef ptr @_ZNK7RNArrayIP10R3TriangleE3KthEi(ptr noundef nonnull align 8 dereferenceable(16) %3, i32 noundef %.04)
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %7, i64 168
  %9 = load ptr, ptr %8, align 8
  tail call void %9(ptr noundef nonnull align 8 dereferenceable(132) %6, i64 %1)
  %10 = add nuw nsw i32 %.04, 1
  %11 = tail call noundef i32 @_ZNK8RNVArray8NEntriesEv(ptr noundef nonnull align 8 dereferenceable(16) %3)
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %.lr.ph, label %._crit_edge, !llvm.loop !8
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNK8RNVArray8NEntriesEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZNK7RNArrayIP10R3TriangleE3KthEi(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) local_unnamed_addr #0 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, !6, i64 0}
!6 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


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