; LLVM IR from priyankchheda/algorithms :: _other_languages/cpp/BinarySearchTree/BST/BST.ll (ZN3BST6heightEP4Node)

; 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.Node = type { i32, 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: mustprogress uwtable
define dso_local noundef i32 @_ZN3BST6heightEP4Node(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef %1) #1 align 2 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %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
  %9 = load ptr, ptr %4, align 8
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  %11 = icmp eq ptr %10, null
  br i1 %11, label %12, label %13

12:                                               ; preds = %2
  store i32 -1, ptr %3, align 4
  br label %32

13:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.Node, ptr %14, i32 0, i32 1
  %16 = load ptr, ptr %15, align 8, !tbaa !9
  %17 = call noundef i32 @_ZN3BST6heightEP4Node(ptr noundef nonnull align 8 dereferenceable(8) %9, ptr noundef %16)
  store i32 %17, ptr %6, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.Node, ptr %18, i32 0, i32 2
  %20 = load ptr, ptr %19, align 8, !tbaa !13
  %21 = call noundef i32 @_ZN3BST6heightEP4Node(ptr noundef nonnull align 8 dereferenceable(8) %9, ptr noundef %20)
  store i32 %21, ptr %7, align 4, !tbaa !12
  %22 = load i32, ptr %6, align 4, !tbaa !12
  %23 = load i32, ptr %7, align 4, !tbaa !12
  %24 = icmp sgt i32 %22, %23
  br i1 %24, label %25, label %28

25:                                               ; preds = %13
  %26 = load i32, ptr %6, align 4, !tbaa !12
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %31

28:                                               ; preds = %13
  %29 = load i32, ptr %7, align 4, !tbaa !12
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %31

31:                                               ; preds = %28, %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %32

32:                                               ; preds = %31, %12
  %33 = load i32, ptr %3, align 4
  ret i32 %33
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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++ 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 nofree nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_ZN3BST6heightEP4Node(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef readonly %1) local_unnamed_addr #0 align 2 {
  %3 = icmp eq ptr %1, null
  br i1 %3, label %common.ret11, label %4

common.ret11:                                     ; preds = %2, %4
  %common.ret11.op = phi i32 [ %.0, %4 ], [ -1, %2 ]
  ret i32 %common.ret11.op

4:                                                ; preds = %2
  %5 = getelementptr inbounds i8, ptr %1, i64 8
  %6 = load ptr, ptr %5, align 8, !tbaa !5
  %7 = tail call noundef i32 @_ZN3BST6heightEP4Node(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef %6)
  %8 = getelementptr inbounds i8, ptr %1, i64 16
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  %10 = tail call noundef i32 @_ZN3BST6heightEP4Node(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef %9)
  %. = tail call i32 @llvm.smax.i32(i32 %7, i32 %10)
  %.0 = add nsw i32 %., 1
  br label %common.ret11
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #1

attributes #0 = { mustprogress nofree nosync nounwind willreturn memory(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" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!6, !10, i64 16}


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