; LLVM IR from HarshCasper/NeoAlgo :: C-Plus-Plus/ds/Leaf_Nodes_BST.ll (Z10leaf_nodesP8treeNode)

; 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.treeNode = type { i32, ptr, ptr }

@_ZZ10leaf_nodesP8treeNodeE5count = external hidden global i32, align 4

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z10leaf_nodesP8treeNode(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = icmp ne ptr %3, null
  br i1 %4, label %5, label %40

5:                                                ; preds = %1
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.treeNode, ptr %6, i32 0, i32 1
  %8 = load ptr, ptr %7, align 8, !tbaa !9
  %9 = icmp eq ptr %8, null
  br i1 %9, label %10, label %18

10:                                               ; preds = %5
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.treeNode, ptr %11, i32 0, i32 2
  %13 = load ptr, ptr %12, align 8, !tbaa !12
  %14 = icmp eq ptr %13, null
  br i1 %14, label %15, label %18

15:                                               ; preds = %10
  %16 = load i32, ptr @_ZZ10leaf_nodesP8treeNodeE5count, align 4, !tbaa !13
  %17 = add nsw i32 %16, 1
  store i32 %17, ptr @_ZZ10leaf_nodesP8treeNodeE5count, align 4, !tbaa !13
  br label %39

18:                                               ; preds = %10, %5
  %19 = load ptr, ptr %2, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.treeNode, ptr %19, i32 0, i32 1
  %21 = load ptr, ptr %20, align 8, !tbaa !9
  %22 = icmp ne ptr %21, null
  br i1 %22, label %23, label %28

23:                                               ; preds = %18
  %24 = load ptr, ptr %2, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.treeNode, ptr %24, i32 0, i32 1
  %26 = load ptr, ptr %25, align 8, !tbaa !9
  %27 = call noundef i32 @_Z10leaf_nodesP8treeNode(ptr noundef %26)
  br label %28

28:                                               ; preds = %23, %18
  %29 = load ptr, ptr %2, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.treeNode, ptr %29, i32 0, i32 2
  %31 = load ptr, ptr %30, align 8, !tbaa !12
  %32 = icmp ne ptr %31, null
  br i1 %32, label %33, label %38

33:                                               ; preds = %28
  %34 = load ptr, ptr %2, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.treeNode, ptr %34, i32 0, i32 2
  %36 = load ptr, ptr %35, align 8, !tbaa !12
  %37 = call noundef i32 @_Z10leaf_nodesP8treeNode(ptr noundef %36)
  br label %38

38:                                               ; preds = %33, %28
  br label %39

39:                                               ; preds = %38, %15
  br label %40

40:                                               ; preds = %39, %1
  %41 = load i32, ptr @_ZZ10leaf_nodesP8treeNodeE5count, align 4, !tbaa !13
  ret i32 %41
}

attributes #0 = { mustprogress 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++ TBAA"}
!9 = !{!10, !6, i64 8}
!10 = !{!"_ZTS8treeNode", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 16}
!13 = !{!11, !11, i64 0}


; 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"

@_ZZ10leaf_nodesP8treeNodeE5count = external hidden local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree nosync nounwind memory(readwrite, argmem: read, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z10leaf_nodesP8treeNode(ptr noundef readonly %0) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %16, label %2

2:                                                ; preds = %1
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = icmp eq ptr %4, null
  br i1 %5, label %6, label %.thread

6:                                                ; preds = %2
  %7 = getelementptr inbounds i8, ptr %0, i64 16
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  %9 = icmp eq ptr %8, null
  br i1 %9, label %10, label %.thread.thread

10:                                               ; preds = %6
  %11 = load i32, ptr @_ZZ10leaf_nodesP8treeNodeE5count, align 4, !tbaa !12
  %12 = add nsw i32 %11, 1
  store i32 %12, ptr @_ZZ10leaf_nodesP8treeNodeE5count, align 4, !tbaa !12
  br label %16

.thread:                                          ; preds = %2
  %13 = tail call noundef i32 @_Z10leaf_nodesP8treeNode(ptr noundef nonnull %4)
  %.phi.trans.insert = getelementptr inbounds i8, ptr %0, i64 16
  %.pre = load ptr, ptr %.phi.trans.insert, align 8, !tbaa !11
  %.not10 = icmp eq ptr %.pre, null
  br i1 %.not10, label %16, label %.thread.thread

.thread.thread:                                   ; preds = %6, %.thread
  %14 = phi ptr [ %.pre, %.thread ], [ %8, %6 ]
  %15 = tail call noundef i32 @_Z10leaf_nodesP8treeNode(ptr noundef nonnull %14)
  br label %16

16:                                               ; preds = %10, %.thread.thread, %.thread, %1
  %17 = load i32, ptr @_ZZ10leaf_nodesP8treeNodeE5count, align 4, !tbaa !12
  ret i32 %17
}

attributes #0 = { mustprogress nofree nosync nounwind memory(readwrite, argmem: read, inaccessiblemem: none) 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, !10, i64 8}
!6 = !{!"_ZTS8treeNode", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 16}
!12 = !{!7, !7, i64 0}


; Effective O3 passes: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,JumpThreadingPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass