; LLVM IR from amritansh22/Data-Structures-and-Algorithms-in-cpp :: Trees/diameter_binary_tree.ll (Z8diameterP14BinaryTreeNode)

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z6heightP14BinaryTreeNode(ptr noundef) #0

; 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)) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z8diameterP14BinaryTreeNode(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
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = icmp eq ptr %9, null
  br i1 %10, label %11, label %12

11:                                               ; preds = %1
  store i32 0, ptr %2, align 4
  br label %36

12:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = getelementptr inbounds %class.BinaryTreeNode, ptr %13, i32 0, i32 1
  %15 = load ptr, ptr %14, align 8, !tbaa !9
  %16 = call noundef i32 @_Z6heightP14BinaryTreeNode(ptr noundef %15)
  store i32 %16, ptr %4, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds %class.BinaryTreeNode, ptr %17, i32 0, i32 2
  %19 = load ptr, ptr %18, align 8, !tbaa !13
  %20 = call noundef i32 @_Z6heightP14BinaryTreeNode(ptr noundef %19)
  store i32 %20, ptr %5, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %class.BinaryTreeNode, ptr %21, i32 0, i32 1
  %23 = load ptr, ptr %22, align 8, !tbaa !9
  %24 = call noundef i32 @_Z8diameterP14BinaryTreeNode(ptr noundef %23)
  store i32 %24, ptr %6, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = getelementptr inbounds %class.BinaryTreeNode, ptr %25, i32 0, i32 2
  %27 = load ptr, ptr %26, align 8, !tbaa !13
  %28 = call noundef i32 @_Z8diameterP14BinaryTreeNode(ptr noundef %27)
  store i32 %28, ptr %7, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %29 = load i32, ptr %4, align 4, !tbaa !12
  %30 = load i32, ptr %5, align 4, !tbaa !12
  %31 = add nsw i32 %29, %30
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %8, align 4, !tbaa !12
  %33 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %6, ptr noundef nonnull align 4 dereferenceable(4) %7)
  %34 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %8, ptr noundef nonnull align 4 dereferenceable(4) %33)
  %35 = load i32, ptr %34, align 4, !tbaa !12
  store i32 %35, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  br label %36

36:                                               ; preds = %12, %11
  %37 = load i32, ptr %2, align 4
  ret i32 %37
}

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 = { 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 #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 = !{!"_ZTS14BinaryTreeNode", !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 uwtable
declare dso_local noundef i32 @_Z6heightP14BinaryTreeNode(ptr noundef) local_unnamed_addr #0

; 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 #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z8diameterP14BinaryTreeNode(ptr noundef readonly %0) local_unnamed_addr #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = icmp eq ptr %0, null
  br i1 %5, label %common.ret8, label %6

common.ret8:                                      ; preds = %1, %6
  %common.ret8.op = phi i32 [ %21, %6 ], [ 0, %1 ]
  ret i32 %common.ret8.op

6:                                                ; preds = %1
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  %8 = load ptr, ptr %7, align 8, !tbaa !5
  %9 = tail call noundef i32 @_Z6heightP14BinaryTreeNode(ptr noundef %8)
  %10 = getelementptr inbounds i8, ptr %0, i64 16
  %11 = load ptr, ptr %10, align 8, !tbaa !11
  %12 = tail call noundef i32 @_Z6heightP14BinaryTreeNode(ptr noundef %11)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  %13 = load ptr, ptr %7, align 8, !tbaa !5
  %14 = tail call noundef i32 @_Z8diameterP14BinaryTreeNode(ptr noundef %13)
  store i32 %14, ptr %2, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  %15 = load ptr, ptr %10, align 8, !tbaa !11
  %16 = tail call noundef i32 @_Z8diameterP14BinaryTreeNode(ptr noundef %15)
  store i32 %16, ptr %3, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  %17 = add i32 %9, 1
  %18 = add i32 %17, %12
  store i32 %18, ptr %4, align 4, !tbaa !12
  %19 = 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)
  %20 = 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) %19)
  %21 = load i32, ptr %20, align 4, !tbaa !12
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  br label %common.ret8
}

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 = { 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 #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 = !{!"_ZTS14BinaryTreeNode", !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: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass