; LLVM IR from AlgoGenesis/C :: Machine_Learning_Algorithms/K-Nearest Neighbors(KNN) (Program)

; 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"

%struct.Point = type { ptr, i32 }

; Function Attrs: nounwind uwtable
define dso_local double @euclidean_distance(ptr %0, i32 %1, ptr %2, i32 %3, i32 noundef %4) #0 {
  %6 = alloca %struct.Point, align 8
  %7 = alloca %struct.Point, align 8
  %8 = alloca i32, align 4
  %9 = alloca double, align 8
  %10 = alloca i32, align 4
  %11 = getelementptr inbounds { ptr, i32 }, ptr %6, i32 0, i32 0
  store ptr %0, ptr %11, align 8
  %12 = getelementptr inbounds { ptr, i32 }, ptr %6, i32 0, i32 1
  store i32 %1, ptr %12, align 8
  %13 = getelementptr inbounds { ptr, i32 }, ptr %7, i32 0, i32 0
  store ptr %2, ptr %13, align 8
  %14 = getelementptr inbounds { ptr, i32 }, ptr %7, i32 0, i32 1
  store i32 %3, ptr %14, align 8
  store i32 %4, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  store double 0.000000e+00, ptr %9, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  store i32 0, ptr %10, align 4, !tbaa !5
  br label %15

15:                                               ; preds = %37, %5
  %16 = load i32, ptr %10, align 4, !tbaa !5
  %17 = load i32, ptr %8, align 4, !tbaa !5
  %18 = icmp slt i32 %16, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  br label %40

20:                                               ; preds = %15
  %21 = getelementptr inbounds %struct.Point, ptr %6, i32 0, i32 0
  %22 = load ptr, ptr %21, align 8, !tbaa !11
  %23 = load i32, ptr %10, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds double, ptr %22, i64 %24
  %26 = load double, ptr %25, align 8, !tbaa !9
  %27 = getelementptr inbounds %struct.Point, ptr %7, i32 0, i32 0
  %28 = load ptr, ptr %27, align 8, !tbaa !11
  %29 = load i32, ptr %10, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds double, ptr %28, i64 %30
  %32 = load double, ptr %31, align 8, !tbaa !9
  %33 = fsub double %26, %32
  %34 = call double @pow(double noundef %33, double noundef 2.000000e+00) #3
  %35 = load double, ptr %9, align 8, !tbaa !9
  %36 = fadd double %35, %34
  store double %36, ptr %9, align 8, !tbaa !9
  br label %37

37:                                               ; preds = %20
  %38 = load i32, ptr %10, align 4, !tbaa !5
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %10, align 4, !tbaa !5
  br label %15, !llvm.loop !14

40:                                               ; preds = %19
  %41 = load double, ptr %9, align 8, !tbaa !9
  %42 = call double @sqrt(double noundef %41) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  ret double %42
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind
declare double @pow(double noundef, double noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind
declare double @sqrt(double noundef) #2

attributes #0 = { 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 "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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"double", !7, i64 0}
!11 = !{!12, !13, i64 0}
!12 = !{!"", !13, i64 0, !6, i64 8}
!13 = !{!"any pointer", !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 nounwind memory(write, argmem: readwrite) uwtable
define dso_local double @euclidean_distance(ptr nocapture readonly %0, i32 %1, ptr nocapture readonly %2, i32 %3, i32 noundef %4) local_unnamed_addr #0 {
  %6 = icmp sgt i32 %4, 0
  br i1 %6, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %5
  %wide.trip.count = zext nneg i32 %4 to i64
  %xtraiter = and i64 %wide.trip.count, 3
  %7 = icmp ult i32 %4, 4
  br i1 %7, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %wide.trip.count, 2147483644
  br label %.lr.ph

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.lcssa.ph = phi double [ poison, %.lr.ph.preheader ], [ %38, %.lr.ph ]
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next.3, %.lr.ph ]
  %.089.unr = phi double [ 0.000000e+00, %.lr.ph.preheader ], [ %38, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil
  %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %.lr.ph.epil ], [ %indvars.iv.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.089.epil = phi double [ %13, %.lr.ph.epil ], [ %.089.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %8 = getelementptr inbounds double, ptr %0, i64 %indvars.iv.epil
  %9 = load double, ptr %8, align 8, !tbaa !5
  %10 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.epil
  %11 = load double, ptr %10, align 8, !tbaa !5
  %12 = fsub double %9, %11
  %square.epil = fmul double %12, %12
  %13 = fadd double %.089.epil, %square.epil
  %indvars.iv.next.epil = add nuw nsw i64 %indvars.iv.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.lr.ph.epil, !llvm.loop !9

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil, %5
  %.08.lcssa = phi double [ 0.000000e+00, %5 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %13, %.lr.ph.epil ]
  %14 = tail call double @sqrt(double noundef %.08.lcssa) #2
  ret double %14

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader.new ], [ %indvars.iv.next.3, %.lr.ph ]
  %.089 = phi double [ 0.000000e+00, %.lr.ph.preheader.new ], [ %38, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.3, %.lr.ph ]
  %15 = getelementptr inbounds double, ptr %0, i64 %indvars.iv
  %16 = load double, ptr %15, align 8, !tbaa !5
  %17 = getelementptr inbounds double, ptr %2, i64 %indvars.iv
  %18 = load double, ptr %17, align 8, !tbaa !5
  %19 = fsub double %16, %18
  %square = fmul double %19, %19
  %20 = fadd double %.089, %square
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %21 = getelementptr inbounds double, ptr %0, i64 %indvars.iv.next
  %22 = load double, ptr %21, align 8, !tbaa !5
  %23 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.next
  %24 = load double, ptr %23, align 8, !tbaa !5
  %25 = fsub double %22, %24
  %square.1 = fmul double %25, %25
  %26 = fadd double %20, %square.1
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %27 = getelementptr inbounds double, ptr %0, i64 %indvars.iv.next.1
  %28 = load double, ptr %27, align 8, !tbaa !5
  %29 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.next.1
  %30 = load double, ptr %29, align 8, !tbaa !5
  %31 = fsub double %28, %30
  %square.2 = fmul double %31, %31
  %32 = fadd double %26, %square.2
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %33 = getelementptr inbounds double, ptr %0, i64 %indvars.iv.next.2
  %34 = load double, ptr %33, align 8, !tbaa !5
  %35 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.next.2
  %36 = load double, ptr %35, align 8, !tbaa !5
  %37 = fsub double %34, %36
  %square.3 = fmul double %37, %37
  %38 = fadd double %32, %square.3
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %niter.next.3 = add i64 %niter, 4
  %niter.ncmp.3 = icmp eq i64 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !11
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(write)
declare double @sqrt(double noundef) local_unnamed_addr #1

attributes #0 = { nofree nounwind memory(write, 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" }
attributes #1 = { mustprogress nofree nounwind willreturn memory(write) "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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.unroll.disable"}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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