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

; 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._AVLTree = type { ptr, ptr, ptr, ptr, i32 }
%struct._AVLTreeNode = type { ptr, ptr, ptr, ptr, ptr, i32 }

; 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_tree_find_node(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct._AVLTree, ptr %9, i32 0, i32 0
  %11 = load ptr, ptr %10, align 8, !tbaa !9
  store ptr %11, ptr %6, align 8, !tbaa !5
  br label %12

12:                                               ; preds = %43, %2
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = icmp ne ptr %13, null
  br i1 %14, label %15, label %44

15:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct._AVLTree, ptr %16, i32 0, i32 1
  %18 = load ptr, ptr %17, align 8, !tbaa !12
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct._AVLTreeNode, ptr %20, i32 0, i32 0
  %22 = load ptr, ptr %21, align 8, !tbaa !13
  %23 = call i32 %18(ptr noundef %19, ptr noundef %22)
  store i32 %23, ptr %7, align 4, !tbaa !15
  %24 = load i32, ptr %7, align 4, !tbaa !15
  %25 = icmp slt i32 %24, 0
  br i1 %25, label %26, label %30

26:                                               ; preds = %15
  %27 = load ptr, ptr %6, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct._AVLTreeNode, ptr %27, i32 0, i32 3
  %29 = load ptr, ptr %28, align 8, !tbaa !16
  store ptr %29, ptr %6, align 8, !tbaa !5
  br label %40

30:                                               ; preds = %15
  %31 = load i32, ptr %7, align 4, !tbaa !15
  %32 = icmp sgt i32 %31, 0
  br i1 %32, label %33, label %37

33:                                               ; preds = %30
  %34 = load ptr, ptr %6, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct._AVLTreeNode, ptr %34, i32 0, i32 4
  %36 = load ptr, ptr %35, align 8, !tbaa !17
  store ptr %36, ptr %6, align 8, !tbaa !5
  br label %39

37:                                               ; preds = %30
  %38 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %38, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %41

39:                                               ; preds = %33
  br label %40

40:                                               ; preds = %39, %26
  store i32 0, ptr %8, align 4
  br label %41

41:                                               ; preds = %40, %37
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  %42 = load i32, ptr %8, align 4
  switch i32 %42, label %45 [
    i32 0, label %43
  ]

43:                                               ; preds = %41
  br label %12, !llvm.loop !18

44:                                               ; preds = %12
  store ptr null, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %45

45:                                               ; preds = %44, %41
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %46 = load ptr, ptr %3, align 8
  ret ptr %46
}

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 = !{!"_AVLTree", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !11, i64 32}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 8}
!13 = !{!14, !6, i64 0}
!14 = !{!"_AVLTreeNode", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !11, i64 40}
!15 = !{!11, !11, i64 0}
!16 = !{!14, !6, i64 24}
!17 = !{!14, !6, i64 32}
!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_tree_find_node(ptr nocapture noundef readonly %0, ptr noundef %1) local_unnamed_addr #0 {
  %.01220 = load ptr, ptr %0, align 8, !tbaa !5
  %.not21 = icmp eq ptr %.01220, null
  br i1 %.not21, label %.thread, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  br label %4

4:                                                ; preds = %.lr.ph, %10
  %.01222 = phi ptr [ %.01220, %.lr.ph ], [ %.012, %10 ]
  %5 = load ptr, ptr %3, align 8, !tbaa !9
  %6 = load ptr, ptr %.01222, align 8, !tbaa !12
  %7 = tail call i32 %5(ptr noundef %1, ptr noundef %6) #1
  %8 = icmp slt i32 %7, 0
  br i1 %8, label %10, label %9

9:                                                ; preds = %4
  %.not16 = icmp eq i32 %7, 0
  br i1 %.not16, label %.thread, label %10

10:                                               ; preds = %9, %4
  %.sink = phi i64 [ 24, %4 ], [ 32, %9 ]
  %11 = getelementptr inbounds i8, ptr %.01222, i64 %.sink
  %.012 = load ptr, ptr %11, align 8, !tbaa !5
  %.not = icmp eq ptr %.012, null
  br i1 %.not, label %.thread, label %4, !llvm.loop !14

.thread:                                          ; preds = %10, %9, %2
  %.012.lcssa = phi ptr [ null, %2 ], [ %.01222, %9 ], [ null, %10 ]
  ret ptr %.012.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 = !{!"_AVLTree", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !11, i64 32}
!11 = !{!"int", !7, i64 0}
!12 = !{!13, !6, i64 0}
!13 = !{!"_AVLTreeNode", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !11, i64 40}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


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