; LLVM IR from li-xilin/axe :: src/core (splay)

; 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.ax_splay_node_st = type { ptr, ptr, ptr }

; Function Attrs: nounwind uwtable
declare hidden ptr @leftmost(ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local ptr @ax_splay_next(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = getelementptr inbounds %struct.ax_splay_node_st, ptr %4, i32 0, i32 2
  %6 = load ptr, ptr %5, align 8, !tbaa !9
  %7 = icmp ne ptr %6, null
  br i1 %7, label %8, label %13

8:                                                ; preds = %1
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.ax_splay_node_st, ptr %9, i32 0, i32 2
  %11 = load ptr, ptr %10, align 8, !tbaa !9
  %12 = call ptr @leftmost(ptr noundef %11)
  store ptr %12, ptr %2, align 8
  br label %37

13:                                               ; preds = %1
  br label %14

14:                                               ; preds = %29, %13
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.ax_splay_node_st, ptr %15, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !11
  %18 = icmp ne ptr %17, null
  br i1 %18, label %19, label %27

19:                                               ; preds = %14
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.ax_splay_node_st, ptr %21, i32 0, i32 0
  %23 = load ptr, ptr %22, align 8, !tbaa !11
  %24 = getelementptr inbounds %struct.ax_splay_node_st, ptr %23, i32 0, i32 2
  %25 = load ptr, ptr %24, align 8, !tbaa !9
  %26 = icmp eq ptr %20, %25
  br label %27

27:                                               ; preds = %19, %14
  %28 = phi i1 [ false, %14 ], [ %26, %19 ]
  br i1 %28, label %29, label %33

29:                                               ; preds = %27
  %30 = load ptr, ptr %3, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.ax_splay_node_st, ptr %30, i32 0, i32 0
  %32 = load ptr, ptr %31, align 8, !tbaa !11
  store ptr %32, ptr %3, align 8, !tbaa !5
  br label %14, !llvm.loop !12

33:                                               ; preds = %27
  %34 = load ptr, ptr %3, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.ax_splay_node_st, ptr %34, i32 0, i32 0
  %36 = load ptr, ptr %35, align 8, !tbaa !11
  store ptr %36, ptr %2, align 8
  br label %37

37:                                               ; preds = %33, %8
  %38 = load ptr, ptr %2, align 8
  ret ptr %38
}

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" }

!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, !6, i64 16}
!10 = !{!"ax_splay_node_st", !6, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!10, !6, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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: nounwind uwtable
declare hidden ptr @leftmost(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local ptr @ax_splay_next(ptr noundef readonly %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 16
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %.preheader, label %4

4:                                                ; preds = %1
  %5 = tail call ptr @leftmost(ptr noundef nonnull %3)
  br label %.critedge

.preheader:                                       ; preds = %1, %7
  %.0 = phi ptr [ %6, %7 ], [ %0, %1 ]
  %6 = load ptr, ptr %.0, align 8, !tbaa !10
  %.not11 = icmp eq ptr %6, null
  br i1 %.not11, label %.critedge, label %7

7:                                                ; preds = %.preheader
  %8 = getelementptr inbounds i8, ptr %6, i64 16
  %9 = load ptr, ptr %8, align 8, !tbaa !5
  %10 = icmp eq ptr %.0, %9
  br i1 %10, label %.preheader, label %.critedge, !llvm.loop !11

.critedge:                                        ; preds = %7, %.preheader, %4
  %.08 = phi ptr [ %5, %4 ], [ %6, %7 ], [ null, %.preheader ]
  ret ptr %.08
}

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" }

!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 16}
!6 = !{!"ax_splay_node_st", !7, i64 0, !7, i64 8, !7, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!6, !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InstCombinePass,JumpThreadingPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass