; LLVM IR from graphitemaster/libintrusive :: avl (avl_search)

; 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.avl_tree_s = type { ptr, ptr }
%struct.avl_node_s = type { i64, ptr, ptr, ptr, ptr }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local ptr @avl_search(ptr noundef %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.avl_tree_s, ptr %11, i32 0, i32 0
  %13 = load ptr, ptr %12, align 8, !tbaa !9
  store ptr %13, ptr %8, align 8, !tbaa !5
  br label %14

14:                                               ; preds = %45, %3
  %15 = load ptr, ptr %8, align 8, !tbaa !5
  %16 = icmp ne ptr %15, null
  br i1 %16, label %18, label %17

17:                                               ; preds = %14
  store i32 2, ptr %9, align 4
  br label %46

18:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %19 = load ptr, ptr %7, align 8, !tbaa !5
  %20 = load ptr, ptr %8, align 8, !tbaa !5
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.avl_tree_s, ptr %22, i32 0, i32 1
  %24 = load ptr, ptr %23, align 8, !tbaa !11
  %25 = call i32 %19(ptr noundef %20, ptr noundef %21, ptr noundef %24)
  store i32 %25, ptr %10, align 4, !tbaa !12
  %26 = load i32, ptr %10, align 4, !tbaa !12
  %27 = icmp sgt i32 %26, 0
  br i1 %27, label %28, label %32

28:                                               ; preds = %18
  %29 = load ptr, ptr %8, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.avl_node_s, ptr %29, i32 0, i32 1
  %31 = load ptr, ptr %30, align 8, !tbaa !14
  store ptr %31, ptr %8, align 8, !tbaa !5
  br label %42

32:                                               ; preds = %18
  %33 = load i32, ptr %10, align 4, !tbaa !12
  %34 = icmp slt i32 %33, 0
  br i1 %34, label %35, label %39

35:                                               ; preds = %32
  %36 = load ptr, ptr %8, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.avl_node_s, ptr %36, i32 0, i32 2
  %38 = load ptr, ptr %37, align 8, !tbaa !17
  store ptr %38, ptr %8, align 8, !tbaa !5
  br label %41

39:                                               ; preds = %32
  %40 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %40, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %43

41:                                               ; preds = %35
  br label %42

42:                                               ; preds = %41, %28
  store i32 0, ptr %9, align 4
  br label %43

43:                                               ; preds = %42, %39
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  %44 = load i32, ptr %9, align 4
  switch i32 %44, label %46 [
    i32 0, label %45
  ]

45:                                               ; preds = %43
  br label %14, !llvm.loop !18

46:                                               ; preds = %43, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %47 = load i32, ptr %9, align 4
  switch i32 %47, label %51 [
    i32 2, label %48
    i32 1, label %49
  ]

48:                                               ; preds = %46
  store ptr null, ptr %4, align 8
  br label %49

49:                                               ; preds = %48, %46
  %50 = load ptr, ptr %4, align 8
  ret ptr %50

51:                                               ; preds = %46
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"avl_tree_s", !6, i64 0, !6, i64 8}
!11 = !{!10, !6, i64 8}
!12 = !{!13, !13, i64 0}
!13 = !{!"int", !7, i64 0}
!14 = !{!15, !6, i64 8}
!15 = !{!"avl_node_s", !16, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32}
!16 = !{!"long", !7, i64 0}
!17 = !{!15, !6, i64 16}
!18 = distinct !{!18, !19}
!19 = !{!"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
define dso_local noundef ptr @avl_search(ptr nocapture noundef readonly %0, ptr noundef %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
  %.01522 = load ptr, ptr %0, align 8, !tbaa !5
  %.not23 = icmp eq ptr %.01522, null
  br i1 %.not23, label %.thread, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  br label %5

5:                                                ; preds = %.lr.ph, %11
  %.01524 = phi ptr [ %.01522, %.lr.ph ], [ %.015, %11 ]
  %6 = load ptr, ptr %4, align 8, !tbaa !9
  %7 = tail call i32 %2(ptr noundef nonnull %.01524, ptr noundef %1, ptr noundef %6) #1
  %8 = icmp sgt i32 %7, 0
  br i1 %8, label %11, label %9

9:                                                ; preds = %5
  %10 = icmp slt i32 %7, 0
  br i1 %10, label %11, label %.thread

11:                                               ; preds = %9, %5
  %.sink = phi i64 [ 8, %5 ], [ 16, %9 ]
  %12 = getelementptr inbounds i8, ptr %.01524, i64 %.sink
  %.015 = load ptr, ptr %12, align 8, !tbaa !5
  %.not = icmp eq ptr %.015, null
  br i1 %.not, label %.thread, label %5, !llvm.loop !11

.thread:                                          ; preds = %11, %9, %3
  %.015.lcssa = phi ptr [ null, %3 ], [ %.01524, %9 ], [ null, %11 ]
  ret ptr %.015.lcssa
}

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 = { 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, !6, i64 8}
!10 = !{!"avl_tree_s", !6, i64 0, !6, i64 8}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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