; LLVM IR from fcimeson/cbTSP :: cbLKH/SRC (BuildKDTree)

; 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.Node = type { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, double, double, double, double, double, double, i8, i8, i8 }

@cutoff = external hidden global i32, align 4
@Dimension = external dso_local global i32, align 4
@KDTree = external hidden global ptr, align 8
@.str = external hidden unnamed_addr constant [54 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [72 x i8], align 1
@__PRETTY_FUNCTION__.BuildKDTree = external hidden unnamed_addr constant [24 x i8], align 1
@FirstNode = external dso_local global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local ptr @BuildKDTree(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = icmp sge i32 %5, 1
  br i1 %6, label %7, label %9

7:                                                ; preds = %1
  %8 = load i32, ptr %2, align 4, !tbaa !5
  br label %10

9:                                                ; preds = %1
  br label %10

10:                                               ; preds = %9, %7
  %11 = phi i32 [ %8, %7 ], [ 1, %9 ]
  store i32 %11, ptr @cutoff, align 4, !tbaa !5
  %12 = load i32, ptr @Dimension, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = mul i64 %13, 8
  %15 = call noalias ptr @malloc(i64 noundef %14) #5
  store ptr %15, ptr @KDTree, align 8, !tbaa !9
  %16 = icmp ne ptr %15, null
  br i1 %16, label %17, label %18

17:                                               ; preds = %10
  br label %19

18:                                               ; preds = %10
  call void @__assert_fail(ptr noundef @.str, ptr noundef @.str.1, i32 noundef 27, ptr noundef @__PRETTY_FUNCTION__.BuildKDTree) #6
  unreachable

19:                                               ; preds = %17
  store i32 0, ptr %3, align 4, !tbaa !5
  %20 = load ptr, ptr @FirstNode, align 8, !tbaa !9
  store ptr %20, ptr %4, align 8, !tbaa !9
  br label %21

21:                                               ; preds = %31, %19
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = load i32, ptr @Dimension, align 4, !tbaa !5
  %24 = icmp slt i32 %22, %23
  br i1 %24, label %25, label %37

25:                                               ; preds = %21
  %26 = load ptr, ptr %4, align 8, !tbaa !9
  %27 = load ptr, ptr @KDTree, align 8, !tbaa !9
  %28 = load i32, ptr %3, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds ptr, ptr %27, i64 %29
  store ptr %26, ptr %30, align 8, !tbaa !9
  br label %31

31:                                               ; preds = %25
  %32 = load i32, ptr %3, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %3, align 4, !tbaa !5
  %34 = load ptr, ptr %4, align 8, !tbaa !9
  %35 = getelementptr inbounds %struct.Node, ptr %34, i32 0, i32 16
  %36 = load ptr, ptr %35, align 8, !tbaa !11
  store ptr %36, ptr %4, align 8, !tbaa !9
  br label %21, !llvm.loop !14

37:                                               ; preds = %21
  %38 = load i32, ptr @Dimension, align 4, !tbaa !5
  %39 = sub nsw i32 %38, 1
  call void @BuildSubKDTree(i32 noundef 0, i32 noundef %39)
  %40 = load ptr, ptr @KDTree, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  ret ptr %40
}

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

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #3

; Function Attrs: nounwind uwtable
declare hidden void @BuildSubKDTree(i32 noundef, i32 noundef) #0

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

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 allocsize(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 #3 = { noreturn 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 }
attributes #5 = { nounwind allocsize(0) }
attributes #6 = { noreturn 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 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !10, i64 72}
!12 = !{!"Node", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12, !6, i64 16, !6, i64 20, !6, i64 24, !6, i64 28, !6, i64 32, !6, i64 36, !6, i64 40, !6, i64 44, !6, i64 48, !6, i64 52, !10, i64 56, !10, i64 64, !10, i64 72, !10, i64 80, !10, i64 88, !10, i64 96, !10, i64 104, !10, i64 112, !10, i64 120, !10, i64 128, !10, i64 136, !10, i64 144, !10, i64 152, !10, i64 160, !10, i64 168, !10, i64 176, !10, i64 184, !10, i64 192, !10, i64 200, !10, i64 208, !10, i64 216, !10, i64 224, !10, i64 232, !10, i64 240, !10, i64 248, !10, i64 256, !10, i64 264, !10, i64 272, !10, i64 280, !10, i64 288, !10, i64 296, !10, i64 304, !13, i64 312, !13, i64 320, !13, i64 328, !13, i64 336, !13, i64 344, !13, i64 352, !7, i64 360, !7, i64 361, !7, i64 362}
!13 = !{!"double", !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"

@cutoff = external hidden local_unnamed_addr global i32, align 4
@Dimension = external dso_local local_unnamed_addr global i32, align 4
@KDTree = external hidden local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [54 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [72 x i8], align 1
@__PRETTY_FUNCTION__.BuildKDTree = external hidden unnamed_addr constant [24 x i8], align 1
@FirstNode = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local ptr @BuildKDTree(i32 noundef %0) local_unnamed_addr #0 {
  %2 = tail call i32 @llvm.smax.i32(i32 %0, i32 1)
  store i32 %2, ptr @cutoff, align 4, !tbaa !5
  %3 = load i32, ptr @Dimension, align 4, !tbaa !5
  %4 = sext i32 %3 to i64
  %5 = shl nsw i64 %4, 3
  %6 = tail call noalias ptr @malloc(i64 noundef %5) #4
  store ptr %6, ptr @KDTree, align 8, !tbaa !9
  %.not = icmp eq ptr %6, null
  br i1 %.not, label %9, label %.preheader

.preheader:                                       ; preds = %1
  %7 = icmp sgt i32 %3, 0
  br i1 %7, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %.preheader
  %wide.trip.count = zext nneg i32 %3 to i64
  %xtraiter = and i64 %wide.trip.count, 3
  %8 = icmp ult i32 %3, 4
  br i1 %8, 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

9:                                                ; preds = %1
  tail call void @__assert_fail(ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, i32 noundef 27, ptr noundef nonnull @__PRETTY_FUNCTION__.BuildKDTree) #5
  unreachable

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader.new ], [ %indvars.iv.next.3, %.lr.ph ]
  %.0.in9 = phi ptr [ @FirstNode, %.lr.ph.preheader.new ], [ %21, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.3, %.lr.ph ]
  %.0 = load ptr, ptr %.0.in9, align 8, !tbaa !9
  %10 = load ptr, ptr @KDTree, align 8, !tbaa !9
  %11 = getelementptr inbounds ptr, ptr %10, i64 %indvars.iv
  store ptr %.0, ptr %11, align 8, !tbaa !9
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %12 = getelementptr inbounds i8, ptr %.0, i64 72
  %.0.1 = load ptr, ptr %12, align 8, !tbaa !9
  %13 = load ptr, ptr @KDTree, align 8, !tbaa !9
  %14 = getelementptr inbounds ptr, ptr %13, i64 %indvars.iv.next
  store ptr %.0.1, ptr %14, align 8, !tbaa !9
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %15 = getelementptr inbounds i8, ptr %.0.1, i64 72
  %.0.2 = load ptr, ptr %15, align 8, !tbaa !9
  %16 = load ptr, ptr @KDTree, align 8, !tbaa !9
  %17 = getelementptr inbounds ptr, ptr %16, i64 %indvars.iv.next.1
  store ptr %.0.2, ptr %17, align 8, !tbaa !9
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %18 = getelementptr inbounds i8, ptr %.0.2, i64 72
  %.0.3 = load ptr, ptr %18, align 8, !tbaa !9
  %19 = load ptr, ptr @KDTree, align 8, !tbaa !9
  %20 = getelementptr inbounds ptr, ptr %19, i64 %indvars.iv.next.2
  store ptr %.0.3, ptr %20, align 8, !tbaa !9
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %21 = getelementptr inbounds i8, ptr %.0.3, i64 72
  %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

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next.3, %.lr.ph ]
  %.0.in9.unr = phi ptr [ @FirstNode, %.lr.ph.preheader ], [ %21, %.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 ]
  %.0.in9.epil = phi ptr [ %24, %.lr.ph.epil ], [ %.0.in9.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %.0.epil = load ptr, ptr %.0.in9.epil, align 8, !tbaa !9
  %22 = load ptr, ptr @KDTree, align 8, !tbaa !9
  %23 = getelementptr inbounds ptr, ptr %22, i64 %indvars.iv.epil
  store ptr %.0.epil, ptr %23, align 8, !tbaa !9
  %indvars.iv.next.epil = add nuw nsw i64 %indvars.iv.epil, 1
  %24 = getelementptr inbounds i8, ptr %.0.epil, i64 72
  %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 !13

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil, %.preheader
  %25 = add nsw i32 %3, -1
  tail call void @BuildSubKDTree(i32 noundef 0, i32 noundef %25)
  %26 = load ptr, ptr @KDTree, align 8, !tbaa !9
  ret ptr %26
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
declare hidden void @BuildSubKDTree(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #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 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { noreturn 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 allocsize(0) }
attributes #5 = { noreturn 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 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.unroll.disable"}


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