; LLVM IR from hutusi/rethink-c :: src (distance)

; 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._Vector = type { ptr, i32 }

; Function Attrs: nounwind uwtable
define dso_local double @euclidiean_distance(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca double, align 8
  %6 = alloca i32, align 4
  %7 = alloca double, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  store double 0.000000e+00, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 0, ptr %6, align 4, !tbaa !11
  br label %8

8:                                                ; preds = %36, %2
  %9 = load i32, ptr %6, align 4, !tbaa !11
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct._Vector, ptr %10, i32 0, i32 1
  %12 = load i32, ptr %11, align 8, !tbaa !13
  %13 = icmp ult i32 %9, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  br label %39

15:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct._Vector, ptr %16, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !15
  %19 = load i32, ptr %6, align 4, !tbaa !11
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds double, ptr %18, i64 %20
  %22 = load double, ptr %21, align 8, !tbaa !9
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct._Vector, ptr %23, i32 0, i32 0
  %25 = load ptr, ptr %24, align 8, !tbaa !15
  %26 = load i32, ptr %6, align 4, !tbaa !11
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds double, ptr %25, i64 %27
  %29 = load double, ptr %28, align 8, !tbaa !9
  %30 = fsub double %22, %29
  %31 = call double @llvm.fabs.f64(double %30)
  store double %31, ptr %7, align 8, !tbaa !9
  %32 = load double, ptr %7, align 8, !tbaa !9
  %33 = load double, ptr %7, align 8, !tbaa !9
  %34 = load double, ptr %5, align 8, !tbaa !9
  %35 = call double @llvm.fmuladd.f64(double %32, double %33, double %34)
  store double %35, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  br label %36

36:                                               ; preds = %15
  %37 = load i32, ptr %6, align 4, !tbaa !11
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %6, align 4, !tbaa !11
  br label %8, !llvm.loop !16

39:                                               ; preds = %14
  %40 = load double, ptr %5, align 8, !tbaa !9
  %41 = call double @sqrt(double noundef %40) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  ret double %41
}

; 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 speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #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) #3

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #3 = { 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 #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, !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 = !{!"double", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !12, i64 8}
!14 = !{!"_Vector", !6, i64 0, !12, i64 8}
!15 = !{!14, !6, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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(readwrite, inaccessiblemem: write) uwtable
define dso_local double @euclidiean_distance(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = load i32, ptr %3, align 8, !tbaa !5
  %.not = icmp eq i32 %4, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %5 = load ptr, ptr %1, align 8, !tbaa !11
  %6 = load ptr, ptr %0, align 8, !tbaa !11
  %wide.trip.count = zext 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.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i64 %wide.trip.count, 4294967292
  br label %15

._crit_edge.loopexit.unr-lcssa:                   ; preds = %15, %.lr.ph
  %.lcssa.ph = phi double [ poison, %.lr.ph ], [ %39, %15 ]
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next.3, %15 ]
  %.012.unr = phi double [ 0.000000e+00, %.lr.ph ], [ %39, %15 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.epil.preheader

.epil.preheader:                                  ; preds = %._crit_edge.loopexit.unr-lcssa, %.epil.preheader
  %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %.epil.preheader ], [ %indvars.iv.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.012.epil = phi double [ %13, %.epil.preheader ], [ %.012.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.epil.preheader ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %8 = getelementptr inbounds double, ptr %5, i64 %indvars.iv.epil
  %9 = load double, ptr %8, align 8, !tbaa !12
  %10 = getelementptr inbounds double, ptr %6, i64 %indvars.iv.epil
  %11 = load double, ptr %10, align 8, !tbaa !12
  %12 = fsub double %9, %11
  %13 = tail call double @llvm.fmuladd.f64(double %12, double %12, double %.012.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 %.epil.preheader, !llvm.loop !14

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.epil.preheader, %2
  %.0.lcssa = phi double [ 0.000000e+00, %2 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %13, %.epil.preheader ]
  %14 = tail call double @sqrt(double noundef %.0.lcssa) #3
  ret double %14

15:                                               ; preds = %15, %.lr.ph.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.new ], [ %indvars.iv.next.3, %15 ]
  %.012 = phi double [ 0.000000e+00, %.lr.ph.new ], [ %39, %15 ]
  %niter = phi i64 [ 0, %.lr.ph.new ], [ %niter.next.3, %15 ]
  %16 = getelementptr inbounds double, ptr %5, i64 %indvars.iv
  %17 = load double, ptr %16, align 8, !tbaa !12
  %18 = getelementptr inbounds double, ptr %6, i64 %indvars.iv
  %19 = load double, ptr %18, align 8, !tbaa !12
  %20 = fsub double %17, %19
  %21 = tail call double @llvm.fmuladd.f64(double %20, double %20, double %.012)
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %22 = getelementptr inbounds double, ptr %5, i64 %indvars.iv.next
  %23 = load double, ptr %22, align 8, !tbaa !12
  %24 = getelementptr inbounds double, ptr %6, i64 %indvars.iv.next
  %25 = load double, ptr %24, align 8, !tbaa !12
  %26 = fsub double %23, %25
  %27 = tail call double @llvm.fmuladd.f64(double %26, double %26, double %21)
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %28 = getelementptr inbounds double, ptr %5, i64 %indvars.iv.next.1
  %29 = load double, ptr %28, align 8, !tbaa !12
  %30 = getelementptr inbounds double, ptr %6, i64 %indvars.iv.next.1
  %31 = load double, ptr %30, align 8, !tbaa !12
  %32 = fsub double %29, %31
  %33 = tail call double @llvm.fmuladd.f64(double %32, double %32, double %27)
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %34 = getelementptr inbounds double, ptr %5, i64 %indvars.iv.next.2
  %35 = load double, ptr %34, align 8, !tbaa !12
  %36 = getelementptr inbounds double, ptr %6, i64 %indvars.iv.next.2
  %37 = load double, ptr %36, align 8, !tbaa !12
  %38 = fsub double %35, %37
  %39 = tail call double @llvm.fmuladd.f64(double %38, double %38, double %33)
  %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 %15, !llvm.loop !16
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #1

; Function Attrs: mustprogress nofree nounwind willreturn memory(write)
declare double @sqrt(double noundef) local_unnamed_addr #2

attributes #0 = { nofree nounwind memory(readwrite, inaccessiblemem: write) 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 nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { 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 #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, !10, i64 8}
!6 = !{!"_Vector", !7, i64 0, !10, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"double", !8, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.unroll.disable"}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}


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