; LLVM IR from devparthgarg/Data-Structures-and-Algorithms :: 15. Binary Tree/15 Check for Balanced Binary Tree/15b.ll (Z12balancedTreeP4Node)

; 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"

%class.Node = type { i32, ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z12balancedTreeP4Node(ptr noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store i32 1, ptr %2, align 4
  br label %39

10:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %class.Node, ptr %11, i32 0, i32 1
  %13 = load ptr, ptr %12, align 8, !tbaa !9
  %14 = call noundef i32 @_Z12balancedTreeP4Node(ptr noundef %13)
  store i32 %14, ptr %4, align 4, !tbaa !12
  %15 = load i32, ptr %4, align 4, !tbaa !12
  %16 = icmp eq i32 %15, -1
  br i1 %16, label %17, label %18

17:                                               ; preds = %10
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %38

18:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds %class.Node, ptr %19, i32 0, i32 2
  %21 = load ptr, ptr %20, align 8, !tbaa !13
  %22 = call noundef i32 @_Z12balancedTreeP4Node(ptr noundef %21)
  store i32 %22, ptr %6, align 4, !tbaa !12
  %23 = load i32, ptr %6, align 4, !tbaa !12
  %24 = icmp eq i32 %23, -1
  br i1 %24, label %25, label %26

25:                                               ; preds = %18
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %37

26:                                               ; preds = %18
  %27 = load i32, ptr %4, align 4, !tbaa !12
  %28 = load i32, ptr %6, align 4, !tbaa !12
  %29 = sub nsw i32 %27, %28
  %30 = call i32 @llvm.abs.i32(i32 %29, i1 true)
  %31 = icmp sgt i32 %30, 1
  br i1 %31, label %32, label %33

32:                                               ; preds = %26
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %37

33:                                               ; preds = %26
  %34 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %6)
  %35 = load i32, ptr %34, align 4, !tbaa !12
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %37

37:                                               ; preds = %33, %32, %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  br label %38

38:                                               ; preds = %37, %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  br label %39

39:                                               ; preds = %38, %9
  %40 = load i32, ptr %2, align 4
  ret i32 %40
}

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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #3

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

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #3 = { inlinehint mustprogress 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 #4 = { 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++ TBAA"}
!9 = !{!10, !6, i64 8}
!10 = !{!"_ZTS4Node", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !6, i64 16}


; 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: mustprogress nounwind uwtable
define dso_local noundef range(i32 -2147483647, -2147483648) i32 @_Z12balancedTreeP4Node(ptr noundef readonly %0) local_unnamed_addr #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = icmp eq ptr %0, null
  br i1 %4, label %25, label %5

5:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #4
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  %8 = tail call noundef i32 @_Z12balancedTreeP4Node(ptr noundef %7)
  store i32 %8, ptr %2, align 4, !tbaa !11
  %9 = icmp eq i32 %8, -1
  br i1 %9, label %24, label %10

10:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #4
  %11 = getelementptr inbounds i8, ptr %0, i64 16
  %12 = load ptr, ptr %11, align 8, !tbaa !12
  %13 = tail call noundef i32 @_Z12balancedTreeP4Node(ptr noundef %12)
  store i32 %13, ptr %3, align 4, !tbaa !11
  %14 = icmp eq i32 %13, -1
  br i1 %14, label %23, label %15

15:                                               ; preds = %10
  %16 = sub nsw i32 %8, %13
  %17 = tail call i32 @llvm.abs.i32(i32 %16, i1 true)
  %18 = icmp ugt i32 %17, 1
  br i1 %18, label %23, label %19

19:                                               ; preds = %15
  %20 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %2, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %21 = load i32, ptr %20, align 4, !tbaa !11
  %22 = add nsw i32 %21, 1
  br label %23

23:                                               ; preds = %15, %10, %19
  %.0 = phi i32 [ %22, %19 ], [ -1, %10 ], [ -1, %15 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  br label %24

24:                                               ; preds = %5, %23
  %.1 = phi i32 [ %.0, %23 ], [ -1, %5 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #4
  br label %25

25:                                               ; preds = %1, %24
  %.2 = phi i32 [ %.1, %24 ], [ 1, %1 ]
  ret i32 %.2
}

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

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #3

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

attributes #0 = { mustprogress 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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #3 = { inlinehint mustprogress 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 #4 = { 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, !10, i64 8}
!6 = !{!"_ZTS4Node", !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 = !{!7, !7, i64 0}
!12 = !{!6, !10, i64 16}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass