; LLVM IR from FOSS-UCSC/FOSSALGO :: algorithms/ar-knn/c (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"

%struct.Point = type { float, float, i8 }

; Function Attrs: nounwind uwtable
define dso_local float @get_euclidean_distance(<2 x float> %0, i8 %1, <2 x float> %2, i8 %3) #0 {
  %5 = alloca %struct.Point, align 4
  %6 = alloca { <2 x float>, i8 }, align 4
  %7 = alloca %struct.Point, align 4
  %8 = alloca { <2 x float>, i8 }, align 4
  %9 = getelementptr inbounds { <2 x float>, i8 }, ptr %6, i32 0, i32 0
  store <2 x float> %0, ptr %9, align 4
  %10 = getelementptr inbounds { <2 x float>, i8 }, ptr %6, i32 0, i32 1
  store i8 %1, ptr %10, align 4
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %5, ptr align 4 %6, i64 12, i1 false)
  %11 = getelementptr inbounds { <2 x float>, i8 }, ptr %8, i32 0, i32 0
  store <2 x float> %2, ptr %11, align 4
  %12 = getelementptr inbounds { <2 x float>, i8 }, ptr %8, i32 0, i32 1
  store i8 %3, ptr %12, align 4
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %7, ptr align 4 %8, i64 12, i1 false)
  %13 = getelementptr inbounds %struct.Point, ptr %5, i32 0, i32 0
  %14 = load float, ptr %13, align 4, !tbaa !5
  %15 = getelementptr inbounds %struct.Point, ptr %7, i32 0, i32 0
  %16 = load float, ptr %15, align 4, !tbaa !5
  %17 = fsub float %14, %16
  %18 = getelementptr inbounds %struct.Point, ptr %5, i32 0, i32 0
  %19 = load float, ptr %18, align 4, !tbaa !5
  %20 = getelementptr inbounds %struct.Point, ptr %7, i32 0, i32 0
  %21 = load float, ptr %20, align 4, !tbaa !5
  %22 = fsub float %19, %21
  %23 = getelementptr inbounds %struct.Point, ptr %5, i32 0, i32 1
  %24 = load float, ptr %23, align 4, !tbaa !10
  %25 = getelementptr inbounds %struct.Point, ptr %7, i32 0, i32 1
  %26 = load float, ptr %25, align 4, !tbaa !10
  %27 = fsub float %24, %26
  %28 = getelementptr inbounds %struct.Point, ptr %5, i32 0, i32 1
  %29 = load float, ptr %28, align 4, !tbaa !10
  %30 = getelementptr inbounds %struct.Point, ptr %7, i32 0, i32 1
  %31 = load float, ptr %30, align 4, !tbaa !10
  %32 = fsub float %29, %31
  %33 = fmul float %27, %32
  %34 = call float @llvm.fmuladd.f32(float %17, float %22, float %33)
  %35 = fpext float %34 to double
  %36 = call double @sqrt(double noundef %35) #4
  %37 = fptrunc double %36 to float
  ret float %37
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1

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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #3

attributes #0 = { nounwind uwtable "min-legal-vector-width"="64" "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 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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, !7, i64 0}
!6 = !{!"", !7, i64 0, !7, i64 4, !8, i64 8}
!7 = !{!"float", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!6, !7, i64 4}


; 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 willreturn memory(none) uwtable
define dso_local float @get_euclidean_distance(<2 x float> %0, i8 %1, <2 x float> %2, i8 %3) local_unnamed_addr #0 {
  %5 = fsub <2 x float> %0, %2
  %6 = extractelement <2 x float> %5, i64 0
  %7 = fsub <2 x float> %0, %2
  %8 = fmul <2 x float> %7, %7
  %9 = extractelement <2 x float> %8, i64 1
  %10 = tail call float @llvm.fmuladd.f32(float %6, float %6, float %9)
  %sqrt = tail call float @llvm.sqrt.f32(float %10)
  ret float %sqrt
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.sqrt.f32(float) #2

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable "min-legal-vector-width"="64" "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 nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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)"}


; Effective O3 passes: AggressiveInstCombinePass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,TailCallElimPass,VectorCombinePass