; LLVM IR from aferikoglou/GenHLSOptimizer :: dataset/rodinia-knn-1-tiling (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: 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 nounwind uwtable
define dso_local void @store(i32 noundef %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = mul nsw i32 %9, 512
  store i32 %10, ptr %7, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %3
  br label %12

12:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %29, %12
  %14 = load i32, ptr %8, align 4, !tbaa !5
  %15 = icmp slt i32 %14, 512
  br i1 %15, label %17, label %16

16:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %32

17:                                               ; preds = %13
  %18 = load ptr, ptr %5, align 8, !tbaa !9
  %19 = load i32, ptr %8, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds float, ptr %18, i64 %20
  %22 = load float, ptr %21, align 4, !tbaa !11
  %23 = load ptr, ptr %6, align 8, !tbaa !9
  %24 = load i32, ptr %7, align 4, !tbaa !5
  %25 = load i32, ptr %8, align 4, !tbaa !5
  %26 = add nsw i32 %24, %25
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds float, ptr %23, i64 %27
  store float %22, ptr %28, align 4, !tbaa !11
  br label %29

29:                                               ; preds = %17
  %30 = load i32, ptr %8, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %8, align 4, !tbaa !5
  br label %13, !llvm.loop !13

32:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 @store(i32 noundef %0, ptr nocapture noundef readonly %1, ptr nocapture noundef writeonly %2) local_unnamed_addr #0 {
vector.memcheck:
  %3 = shl nsw i32 %0, 9
  %4 = sext i32 %3 to i64
  %invariant.gep = getelementptr float, ptr %2, i64 %4
  %5 = ptrtoint ptr %2 to i64
  %6 = ptrtoint ptr %1 to i64
  %7 = shl nsw i64 %4, 2
  %8 = add i64 %7, %5
  %9 = sub i64 %8, %6
  %diff.check = icmp ult i64 %9, 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 ]
  %10 = getelementptr inbounds float, ptr %1, i64 %index
  %11 = getelementptr inbounds i8, ptr %10, i64 16
  %wide.load = load <4 x float>, ptr %10, align 4, !tbaa !5
  %wide.load9 = load <4 x float>, ptr %11, align 4, !tbaa !5
  %12 = getelementptr float, ptr %invariant.gep, i64 %index
  %13 = getelementptr i8, ptr %12, i64 16
  store <4 x float> %wide.load, ptr %12, align 4, !tbaa !5
  store <4 x float> %wide.load9, ptr %13, align 4, !tbaa !5
  %index.next = or disjoint i64 %index, 8
  %14 = getelementptr inbounds float, ptr %1, i64 %index.next
  %15 = getelementptr inbounds i8, ptr %14, i64 16
  %wide.load.1 = load <4 x float>, ptr %14, align 4, !tbaa !5
  %wide.load9.1 = load <4 x float>, ptr %15, align 4, !tbaa !5
  %16 = getelementptr float, ptr %invariant.gep, i64 %index.next
  %17 = getelementptr i8, ptr %16, i64 16
  store <4 x float> %wide.load.1, ptr %16, align 4, !tbaa !5
  store <4 x float> %wide.load9.1, ptr %17, align 4, !tbaa !5
  %index.next.1 = or disjoint i64 %index, 16
  %18 = getelementptr inbounds float, ptr %1, i64 %index.next.1
  %19 = getelementptr inbounds i8, ptr %18, i64 16
  %wide.load.2 = load <4 x float>, ptr %18, align 4, !tbaa !5
  %wide.load9.2 = load <4 x float>, ptr %19, align 4, !tbaa !5
  %20 = getelementptr float, ptr %invariant.gep, i64 %index.next.1
  %21 = getelementptr i8, ptr %20, i64 16
  store <4 x float> %wide.load.2, ptr %20, align 4, !tbaa !5
  store <4 x float> %wide.load9.2, ptr %21, align 4, !tbaa !5
  %index.next.2 = or disjoint i64 %index, 24
  %22 = getelementptr inbounds float, ptr %1, i64 %index.next.2
  %23 = getelementptr inbounds i8, ptr %22, i64 16
  %wide.load.3 = load <4 x float>, ptr %22, align 4, !tbaa !5
  %wide.load9.3 = load <4 x float>, ptr %23, align 4, !tbaa !5
  %24 = getelementptr float, ptr %invariant.gep, i64 %index.next.2
  %25 = getelementptr i8, ptr %24, i64 16
  store <4 x float> %wide.load.3, ptr %24, align 4, !tbaa !5
  store <4 x float> %wide.load9.3, ptr %25, align 4, !tbaa !5
  %index.next.3 = add nuw nsw i64 %index, 32
  %26 = icmp eq i64 %index.next.3, 512
  br i1 %26, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body, %scalar.ph
  ret void

scalar.ph:                                        ; preds = %vector.memcheck, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %scalar.ph ], [ 0, %vector.memcheck ]
  %27 = getelementptr inbounds float, ptr %1, i64 %indvars.iv
  %28 = load float, ptr %27, align 4, !tbaa !5
  %gep = getelementptr float, ptr %invariant.gep, i64 %indvars.iv
  store float %28, ptr %gep, align 4, !tbaa !5
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %29 = getelementptr inbounds float, ptr %1, i64 %indvars.iv.next
  %30 = load float, ptr %29, align 4, !tbaa !5
  %gep.1 = getelementptr float, ptr %invariant.gep, i64 %indvars.iv.next
  store float %30, ptr %gep.1, align 4, !tbaa !5
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %31 = getelementptr inbounds float, ptr %1, i64 %indvars.iv.next.1
  %32 = load float, ptr %31, align 4, !tbaa !5
  %gep.2 = getelementptr float, ptr %invariant.gep, i64 %indvars.iv.next.1
  store float %32, ptr %gep.2, align 4, !tbaa !5
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %33 = getelementptr inbounds float, ptr %1, i64 %indvars.iv.next.2
  %34 = load float, ptr %33, align 4, !tbaa !5
  %gep.3 = getelementptr float, ptr %invariant.gep, i64 %indvars.iv.next.2
  store float %34, ptr %gep.3, 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, 512
  br i1 %exitcond.not.3, label %middle.block, label %scalar.ph, !llvm.loop !13
}

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,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass