; LLVM IR from intel/qpl :: sources/core-sw/src/filtering (qplc_pack_8u)

; 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: 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: nounwind uwtable
define dso_local void @px_qplc_pack_8u16u(ptr noundef %0, i32 noundef %1, ptr noundef %2, i32 noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  store i32 %3, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %11 = load ptr, ptr %7, align 8, !tbaa !5
  store ptr %11, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %12

12:                                               ; preds = %28, %4
  %13 = load i32, ptr %10, align 4, !tbaa !9
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = icmp ult i32 %13, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %31

17:                                               ; preds = %12
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = load i32, ptr %10, align 4, !tbaa !9
  %20 = zext i32 %19 to i64
  %21 = getelementptr inbounds i8, ptr %18, i64 %20
  %22 = load i8, ptr %21, align 1, !tbaa !11
  %23 = zext i8 %22 to i16
  %24 = load ptr, ptr %9, align 8, !tbaa !5
  %25 = load i32, ptr %10, align 4, !tbaa !9
  %26 = zext i32 %25 to i64
  %27 = getelementptr inbounds i16, ptr %24, i64 %26
  store i16 %23, ptr %27, align 2, !tbaa !12
  br label %28

28:                                               ; preds = %17
  %29 = load i32, ptr %10, align 4, !tbaa !9
  %30 = add i32 %29, 1
  store i32 %30, ptr %10, align 4, !tbaa !9
  br label %12, !llvm.loop !14

31:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"short", !7, 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: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @px_qplc_pack_8u16u(ptr nocapture noundef readonly %0, i32 noundef %1, ptr nocapture noundef writeonly %2, i32 noundef %3) local_unnamed_addr #0 {
  %.not = icmp eq i32 %1, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %4
  %wide.trip.count = zext i32 %1 to i64
  %min.iters.check = icmp ult i32 %1, 16
  br i1 %min.iters.check, label %.lr.ph.preheader11, label %vector.memcheck

.lr.ph.preheader11:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %wide.trip.count, 3
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader11, %.lr.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %.lr.ph.prol ], [ %indvars.iv.ph, %.lr.ph.preheader11 ]
  %prol.iter = phi i64 [ %prol.iter.next, %.lr.ph.prol ], [ 0, %.lr.ph.preheader11 ]
  %5 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.prol
  %6 = load i8, ptr %5, align 1, !tbaa !5
  %7 = zext i8 %6 to i16
  %8 = getelementptr inbounds i16, ptr %2, i64 %indvars.iv.prol
  store i16 %7, ptr %8, align 2, !tbaa !8
  %indvars.iv.next.prol = add nuw nsw i64 %indvars.iv.prol, 1
  %prol.iter.next = add i64 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i64 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol, !llvm.loop !10

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader11
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader11 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %9 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %10 = icmp ugt i64 %9, -4
  br i1 %10, label %._crit_edge, label %.lr.ph

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %11 = shl nuw nsw i64 %wide.trip.count, 1
  %scevgep = getelementptr i8, ptr %2, i64 %11
  %scevgep9 = getelementptr i8, ptr %0, i64 %wide.trip.count
  %bound0 = icmp ugt ptr %scevgep9, %2
  %bound1 = icmp ugt ptr %scevgep, %0
  %found.conflict = and i1 %bound0, %bound1
  br i1 %found.conflict, label %.lr.ph.preheader11, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %wide.trip.count, 4294967280
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %12 = getelementptr inbounds i8, ptr %0, i64 %index
  %13 = getelementptr inbounds i8, ptr %12, i64 8
  %wide.load = load <8 x i8>, ptr %12, align 1, !tbaa !5, !alias.scope !12
  %wide.load10 = load <8 x i8>, ptr %13, align 1, !tbaa !5, !alias.scope !12
  %14 = zext <8 x i8> %wide.load to <8 x i16>
  %15 = zext <8 x i8> %wide.load10 to <8 x i16>
  %16 = getelementptr inbounds i16, ptr %2, i64 %index
  %17 = getelementptr inbounds i8, ptr %16, i64 16
  store <8 x i16> %14, ptr %16, align 2, !tbaa !8, !alias.scope !15, !noalias !12
  store <8 x i16> %15, ptr %17, align 2, !tbaa !8, !alias.scope !15, !noalias !12
  %index.next = add nuw i64 %index, 16
  %18 = icmp eq i64 %index.next, %n.vec
  br i1 %18, label %middle.block, label %vector.body, !llvm.loop !17

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader11

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block, %4
  ret void

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %19 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %20 = load i8, ptr %19, align 1, !tbaa !5
  %21 = zext i8 %20 to i16
  %22 = getelementptr inbounds i16, ptr %2, i64 %indvars.iv
  store i16 %21, ptr %22, align 2, !tbaa !8
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %23 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next
  %24 = load i8, ptr %23, align 1, !tbaa !5
  %25 = zext i8 %24 to i16
  %26 = getelementptr inbounds i16, ptr %2, i64 %indvars.iv.next
  store i16 %25, ptr %26, align 2, !tbaa !8
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %27 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next.1
  %28 = load i8, ptr %27, align 1, !tbaa !5
  %29 = zext i8 %28 to i16
  %30 = getelementptr inbounds i16, ptr %2, i64 %indvars.iv.next.1
  store i16 %29, ptr %30, align 2, !tbaa !8
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %31 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next.2
  %32 = load i8, ptr %31, align 1, !tbaa !5
  %33 = zext i8 %32 to i16
  %34 = getelementptr inbounds i16, ptr %2, i64 %indvars.iv.next.2
  store i16 %33, ptr %34, align 2, !tbaa !8
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, %wide.trip.count
  br i1 %exitcond.not.3, label %._crit_edge, label %.lr.ph, !llvm.loop !21
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"short", !6, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.unroll.disable"}
!12 = !{!13}
!13 = distinct !{!13, !14}
!14 = distinct !{!14, !"LVerDomain"}
!15 = !{!16}
!16 = distinct !{!16, !14}
!17 = distinct !{!17, !18, !19, !20}
!18 = !{!"llvm.loop.mustprogress"}
!19 = !{!"llvm.loop.isvectorized", i32 1}
!20 = !{!"llvm.loop.unroll.runtime.disable"}
!21 = distinct !{!21, !18, !19}


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