; LLVM IR from niessner/Matterport :: code/gaps/pkgs/R2Shapes/R2Image.ll (ZN7R2Image5ClearERK5RNRgb)

; 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.R2Image = type { i32, i32, i32, i32, ptr }

; 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 @_ZN7R2Image5ClearERK5RNRgb(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1) #1 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
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %8 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %30, %2
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = getelementptr inbounds %class.R2Image, ptr %8, i32 0, i32 0
  %12 = load i32, ptr %11, align 8, !tbaa !11
  %13 = icmp slt i32 %10, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %9
  store i32 2, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %33

15:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %16

16:                                               ; preds = %26, %15
  %17 = load i32, ptr %7, align 4, !tbaa !9
  %18 = getelementptr inbounds %class.R2Image, ptr %8, i32 0, i32 1
  %19 = load i32, ptr %18, align 4, !tbaa !13
  %20 = icmp slt i32 %17, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %16
  store i32 5, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %29

22:                                               ; preds = %16
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = load i32, ptr %7, align 4, !tbaa !9
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  call void @_ZN7R2Image11SetPixelRGBEiiRK5RNRgb(ptr noundef nonnull align 8 dereferenceable(24) %8, i32 noundef %23, i32 noundef %24, ptr noundef nonnull align 8 dereferenceable(24) %25)
  br label %26

26:                                               ; preds = %22
  %27 = load i32, ptr %7, align 4, !tbaa !9
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %7, align 4, !tbaa !9
  br label %16, !llvm.loop !14

29:                                               ; preds = %21
  br label %30

30:                                               ; preds = %29
  %31 = load i32, ptr %5, align 4, !tbaa !9
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %5, align 4, !tbaa !9
  br label %9, !llvm.loop !16

33:                                               ; preds = %14
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7R2Image11SetPixelRGBEiiRK5RNRgb(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef, i32 noundef, ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

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 = { 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 0}
!12 = !{!"_ZTS7R2Image", !10, i64 0, !10, i64 4, !10, i64 8, !10, i64 12, !6, i64 16}
!13 = !{!12, !10, i64 4}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}
!16 = distinct !{!16, !15}


; 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 @_ZN7R2Image5ClearERK5RNRgb(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1) local_unnamed_addr #0 align 2 {
  %3 = load i32, ptr %0, align 8, !tbaa !5
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.preheader.lr.ph, label %._crit_edge10

.preheader.lr.ph:                                 ; preds = %2
  %5 = getelementptr inbounds i8, ptr %0, i64 4
  %6 = load i32, ptr %5, align 4, !tbaa !11
  %7 = icmp sgt i32 %6, 0
  br i1 %7, label %.preheader, label %._crit_edge10

.preheader:                                       ; preds = %.preheader.lr.ph, %._crit_edge
  %8 = phi i32 [ %11, %._crit_edge ], [ %3, %.preheader.lr.ph ]
  %9 = phi i32 [ %12, %._crit_edge ], [ %6, %.preheader.lr.ph ]
  %.079 = phi i32 [ %13, %._crit_edge ], [ 0, %.preheader.lr.ph ]
  %10 = icmp sgt i32 %9, 0
  br i1 %10, label %.lr.ph, label %._crit_edge

._crit_edge10:                                    ; preds = %._crit_edge, %.preheader.lr.ph, %2
  ret void

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %.pre = load i32, ptr %0, align 8, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %.preheader
  %11 = phi i32 [ %.pre, %._crit_edge.loopexit ], [ %8, %.preheader ]
  %12 = phi i32 [ %16, %._crit_edge.loopexit ], [ %9, %.preheader ]
  %13 = add nuw nsw i32 %.079, 1
  %14 = icmp slt i32 %13, %11
  br i1 %14, label %.preheader, label %._crit_edge10, !llvm.loop !12

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %.08 = phi i32 [ %15, %.lr.ph ], [ 0, %.preheader ]
  tail call void @_ZN7R2Image11SetPixelRGBEiiRK5RNRgb(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %.079, i32 noundef %.08, ptr noundef nonnull align 8 dereferenceable(24) %1)
  %15 = add nuw nsw i32 %.08, 1
  %16 = load i32, ptr %5, align 4, !tbaa !11
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %.lr.ph, label %._crit_edge.loopexit, !llvm.loop !15
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7R2Image11SetPixelRGBEiiRK5RNRgb(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef, i32 noundef, ptr noundef nonnull align 8 dereferenceable(24)) 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" }

!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, !7, i64 0}
!6 = !{!"_ZTS7R2Image", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 4}
!12 = distinct !{!12, !13, !14}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!"llvm.loop.unswitch.partial.disable"}
!15 = distinct !{!15, !13}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimpleLoopUnswitchPass,SimplifyCFGPass,TailCallElimPass