; LLVM IR from aferikoglou/GenHLSOptimizer :: dataset/rodinia-knn-4-doublebuffer (knn)

; 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: mustprogress nounwind uwtable
define dso_local void @load(i32 noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef %3) #0 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store i32 %0, ptr %5, align 4, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !9
  store ptr %3, ptr %8, align 8, !tbaa !9
  %11 = load i32, ptr %5, align 4, !tbaa !5
  %12 = icmp ne i32 %11, 0
  br i1 %12, label %13, label %39

13:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = mul nsw i32 %14, 512
  %16 = mul nsw i32 %15, 2
  store i32 %16, ptr %9, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %13
  br label %18

18:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  store i32 0, ptr %10, align 4, !tbaa !5
  br label %19

19:                                               ; preds = %35, %18
  %20 = load i32, ptr %10, align 4, !tbaa !5
  %21 = icmp slt i32 %20, 1024
  br i1 %21, label %23, label %22

22:                                               ; preds = %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %38

23:                                               ; preds = %19
  %24 = load ptr, ptr %7, align 8, !tbaa !9
  %25 = load i32, ptr %9, align 4, !tbaa !5
  %26 = load i32, ptr %10, align 4, !tbaa !5
  %27 = add nsw i32 %25, %26
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds float, ptr %24, i64 %28
  %30 = load float, ptr %29, align 4, !tbaa !11
  %31 = load ptr, ptr %8, align 8, !tbaa !9
  %32 = load i32, ptr %10, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds float, ptr %31, i64 %33
  store float %30, ptr %34, align 4, !tbaa !11
  br label %35

35:                                               ; preds = %23
  %36 = load i32, ptr %10, align 4, !tbaa !5
  %37 = add nsw i32 %36, 1
  store i32 %37, ptr %10, align 4, !tbaa !5
  br label %19, !llvm.loop !13

38:                                               ; preds = %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  br label %39

39:                                               ; preds = %38, %4
  ret void
}

; 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

attributes #0 = { 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 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"float", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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 nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @load(i32 noundef %0, i32 noundef %1, ptr nocapture noundef readonly %2, ptr nocapture noundef writeonly %3) local_unnamed_addr #0 {
  %.not = icmp eq i32 %0, 0
  br i1 %.not, label %.loopexit, label %vector.memcheck

vector.memcheck:                                  ; preds = %4
  %5 = ptrtoint ptr %3 to i64
  %6 = ptrtoint ptr %2 to i64
  %7 = shl nsw i32 %1, 10
  %8 = sext i32 %7 to i64
  %invariant.gep = getelementptr float, ptr %2, i64 %8
  %9 = shl nsw i64 %8, 2
  %10 = add i64 %9, %6
  %11 = sub i64 %5, %10
  %diff.check = icmp ult i64 %11, 32
  br i1 %diff.check, label %scalar.ph, label %vector.body

vector.body:                                      ; preds = %vector.memcheck, %vector.body
  %index = phi i64 [ %index.next.3, %vector.body ], [ 0, %vector.memcheck ]
  %12 = getelementptr float, ptr %invariant.gep, i64 %index
  %13 = getelementptr i8, ptr %12, i64 16
  %wide.load = load <4 x float>, ptr %12, align 4, !tbaa !5
  %wide.load10 = load <4 x float>, ptr %13, align 4, !tbaa !5
  %14 = getelementptr inbounds float, ptr %3, i64 %index
  %15 = getelementptr inbounds i8, ptr %14, i64 16
  store <4 x float> %wide.load, ptr %14, align 4, !tbaa !5
  store <4 x float> %wide.load10, ptr %15, align 4, !tbaa !5
  %index.next = or disjoint i64 %index, 8
  %16 = getelementptr float, ptr %invariant.gep, i64 %index.next
  %17 = getelementptr i8, ptr %16, i64 16
  %wide.load.1 = load <4 x float>, ptr %16, align 4, !tbaa !5
  %wide.load10.1 = load <4 x float>, ptr %17, align 4, !tbaa !5
  %18 = getelementptr inbounds float, ptr %3, i64 %index.next
  %19 = getelementptr inbounds i8, ptr %18, i64 16
  store <4 x float> %wide.load.1, ptr %18, align 4, !tbaa !5
  store <4 x float> %wide.load10.1, ptr %19, align 4, !tbaa !5
  %index.next.1 = or disjoint i64 %index, 16
  %20 = getelementptr float, ptr %invariant.gep, i64 %index.next.1
  %21 = getelementptr i8, ptr %20, i64 16
  %wide.load.2 = load <4 x float>, ptr %20, align 4, !tbaa !5
  %wide.load10.2 = load <4 x float>, ptr %21, align 4, !tbaa !5
  %22 = getelementptr inbounds float, ptr %3, i64 %index.next.1
  %23 = getelementptr inbounds i8, ptr %22, i64 16
  store <4 x float> %wide.load.2, ptr %22, align 4, !tbaa !5
  store <4 x float> %wide.load10.2, ptr %23, align 4, !tbaa !5
  %index.next.2 = or disjoint i64 %index, 24
  %24 = getelementptr float, ptr %invariant.gep, i64 %index.next.2
  %25 = getelementptr i8, ptr %24, i64 16
  %wide.load.3 = load <4 x float>, ptr %24, align 4, !tbaa !5
  %wide.load10.3 = load <4 x float>, ptr %25, align 4, !tbaa !5
  %26 = getelementptr inbounds float, ptr %3, i64 %index.next.2
  %27 = getelementptr inbounds i8, ptr %26, i64 16
  store <4 x float> %wide.load.3, ptr %26, align 4, !tbaa !5
  store <4 x float> %wide.load10.3, ptr %27, align 4, !tbaa !5
  %index.next.3 = add nuw nsw i64 %index, 32
  %28 = icmp eq i64 %index.next.3, 1024
  br i1 %28, label %.loopexit, label %vector.body, !llvm.loop !9

scalar.ph:                                        ; preds = %vector.memcheck, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %scalar.ph ], [ 0, %vector.memcheck ]
  %gep = getelementptr float, ptr %invariant.gep, i64 %indvars.iv
  %29 = load float, ptr %gep, align 4, !tbaa !5
  %30 = getelementptr inbounds float, ptr %3, i64 %indvars.iv
  store float %29, ptr %30, align 4, !tbaa !5
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %gep.1 = getelementptr float, ptr %invariant.gep, i64 %indvars.iv.next
  %31 = load float, ptr %gep.1, align 4, !tbaa !5
  %32 = getelementptr inbounds float, ptr %3, i64 %indvars.iv.next
  store float %31, ptr %32, align 4, !tbaa !5
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %gep.2 = getelementptr float, ptr %invariant.gep, i64 %indvars.iv.next.1
  %33 = load float, ptr %gep.2, align 4, !tbaa !5
  %34 = getelementptr inbounds float, ptr %3, i64 %indvars.iv.next.1
  store float %33, ptr %34, align 4, !tbaa !5
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %gep.3 = getelementptr float, ptr %invariant.gep, i64 %indvars.iv.next.2
  %35 = load float, ptr %gep.3, align 4, !tbaa !5
  %36 = getelementptr inbounds float, ptr %3, i64 %indvars.iv.next.2
  store float %35, ptr %36, align 4, !tbaa !5
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, 1024
  br i1 %exitcond.not.3, label %.loopexit, label %scalar.ph, !llvm.loop !13

.loopexit:                                        ; preds = %vector.body, %scalar.ph, %4
  ret void
}

attributes #0 = { mustprogress 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 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !11}


; Effective O3 passes: GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass