; LLVM IR from sumitsojha88/Placement-Preparation :: Leetcode Solution/Tree/Easy/check_binary_tree_subtree.ll (Z9isBSTUtilP4NodeRS0_)

; 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: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z9isBSTUtilP4NodeRS0_(ptr noundef %0, ptr noundef nonnull align 8 dereferenceable(8) %1) #0 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = icmp ne ptr %6, null
  br i1 %7, label %8, label %37

8:                                                ; preds = %2
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.Node, ptr %9, i32 0, i32 1
  %11 = load ptr, ptr %10, align 8, !tbaa !9
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = call noundef zeroext i1 @_Z9isBSTUtilP4NodeRS0_(ptr noundef %11, ptr noundef nonnull align 8 dereferenceable(8) %12)
  br i1 %13, label %15, label %14

14:                                               ; preds = %8
  store i1 false, ptr %3, align 1
  br label %38

15:                                               ; preds = %8
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = load ptr, ptr %16, align 8, !tbaa !5
  %18 = icmp ne ptr %17, null
  br i1 %18, label %19, label %29

19:                                               ; preds = %15
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.Node, ptr %20, i32 0, i32 0
  %22 = load i32, ptr %21, align 8, !tbaa !12
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = load ptr, ptr %23, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.Node, ptr %24, i32 0, i32 0
  %26 = load i32, ptr %25, align 8, !tbaa !12
  %27 = icmp sle i32 %22, %26
  br i1 %27, label %28, label %29

28:                                               ; preds = %19
  store i1 false, ptr %3, align 1
  br label %38

29:                                               ; preds = %19, %15
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %30, ptr %31, align 8, !tbaa !5
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.Node, ptr %32, i32 0, i32 2
  %34 = load ptr, ptr %33, align 8, !tbaa !13
  %35 = load ptr, ptr %5, align 8, !tbaa !5
  %36 = call noundef zeroext i1 @_Z9isBSTUtilP4NodeRS0_(ptr noundef %34, ptr noundef nonnull align 8 dereferenceable(8) %35)
  store i1 %36, ptr %3, align 1
  br label %38

37:                                               ; preds = %2
  store i1 true, ptr %3, align 1
  br label %38

38:                                               ; preds = %37, %29, %28, %14
  %39 = load i1, ptr %3, align 1
  ret i1 %39
}

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 = !{!"_ZTS4Node", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !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 memory(readwrite, inaccessiblemem: none) uwtable
define dso_local noundef zeroext i1 @_Z9isBSTUtilP4NodeRS0_(ptr noundef %0, ptr nocapture noundef nonnull align 8 dereferenceable(8) %1) local_unnamed_addr #0 {
  %.not16 = icmp eq ptr %0, null
  br i1 %.not16, label %tailrecurse._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %tailrecurse
  %.tr17 = phi ptr [ %12, %tailrecurse ], [ %0, %2 ]
  %3 = getelementptr inbounds i8, ptr %.tr17, i64 8
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = tail call noundef zeroext i1 @_Z9isBSTUtilP4NodeRS0_(ptr noundef %4, ptr noundef nonnull align 8 dereferenceable(8) %1)
  br i1 %5, label %6, label %tailrecurse._crit_edge

6:                                                ; preds = %.lr.ph
  %7 = load ptr, ptr %1, align 8, !tbaa !11
  %.not13 = icmp eq ptr %7, null
  br i1 %.not13, label %tailrecurse, label %8

8:                                                ; preds = %6
  %9 = load i32, ptr %.tr17, align 8, !tbaa !12
  %10 = load i32, ptr %7, align 8, !tbaa !12
  %.not14 = icmp sgt i32 %9, %10
  br i1 %.not14, label %tailrecurse, label %tailrecurse._crit_edge

tailrecurse:                                      ; preds = %8, %6
  store ptr %.tr17, ptr %1, align 8, !tbaa !11
  %11 = getelementptr inbounds i8, ptr %.tr17, i64 16
  %12 = load ptr, ptr %11, align 8, !tbaa !13
  %.not = icmp eq ptr %12, null
  br i1 %.not, label %tailrecurse._crit_edge, label %.lr.ph

tailrecurse._crit_edge:                           ; preds = %.lr.ph, %8, %tailrecurse, %2
  %.0 = phi i1 [ true, %2 ], [ true, %tailrecurse ], [ false, %8 ], [ false, %.lr.ph ]
  ret i1 %.0
}

attributes #0 = { mustprogress nofree nosync nounwind memory(readwrite, 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 = !{!"_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 = !{!10, !10, i64 0}
!12 = !{!6, !7, i64 0}
!13 = !{!6, !10, i64 16}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass