; LLVM IR from KishanBGajera/2024-366-Days-Of-DSA :: Data Structures/Non-Linear/Tree/Binary Tree/C (main)

; 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 }

; 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: nounwind uwtable
define dso_local ptr @searchNode(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %11, label %44

11:                                               ; preds = %2
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.TreeNode, ptr %12, i32 0, i32 0
  %14 = load i32, ptr %13, align 8, !tbaa !11
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = icmp eq i32 %14, %15
  br i1 %16, label %17, label %19

17:                                               ; preds = %11
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %18, ptr %3, align 8
  br label %45

19:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.TreeNode, ptr %20, i32 0, i32 1
  %22 = load ptr, ptr %21, align 8, !tbaa !13
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = call ptr @searchNode(ptr noundef %22, i32 noundef %23)
  store ptr %24, ptr %6, align 8, !tbaa !5
  %25 = load ptr, ptr %6, align 8, !tbaa !5
  %26 = icmp ne ptr %25, null
  br i1 %26, label %27, label %29

27:                                               ; preds = %19
  %28 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %28, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %41

29:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.TreeNode, ptr %30, i32 0, i32 2
  %32 = load ptr, ptr %31, align 8, !tbaa !14
  %33 = load i32, ptr %5, align 4, !tbaa !9
  %34 = call ptr @searchNode(ptr noundef %32, i32 noundef %33)
  store ptr %34, ptr %8, align 8, !tbaa !5
  %35 = load ptr, ptr %8, align 8, !tbaa !5
  %36 = icmp ne ptr %35, null
  br i1 %36, label %37, label %39

37:                                               ; preds = %29
  %38 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %38, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %40

39:                                               ; preds = %29
  store i32 0, ptr %7, align 4
  br label %40

40:                                               ; preds = %39, %37
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  br label %41

41:                                               ; preds = %40, %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %42 = load i32, ptr %7, align 4
  switch i32 %42, label %47 [
    i32 0, label %43
    i32 1, label %45
  ]

43:                                               ; preds = %41
  br label %44

44:                                               ; preds = %43, %2
  store ptr null, ptr %3, align 8
  br label %45

45:                                               ; preds = %44, %41, %17
  %46 = load ptr, ptr %3, align 8
  ret ptr %46

47:                                               ; preds = %41
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"TreeNode", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!12, !6, i64 8}
!14 = !{!12, !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: nofree nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local ptr @searchNode(ptr noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %.not23 = icmp eq ptr %0, null
  br i1 %.not23, label %.thread, label %.lr.ph

.lr.ph:                                           ; preds = %2, %tailrecurse
  %.tr24 = phi ptr [ %10, %tailrecurse ], [ %0, %2 ]
  %3 = load i32, ptr %.tr24, align 8, !tbaa !5
  %4 = icmp eq i32 %3, %1
  br i1 %4, label %.thread, label %5

5:                                                ; preds = %.lr.ph
  %6 = getelementptr inbounds i8, ptr %.tr24, i64 8
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  %8 = tail call ptr @searchNode(ptr noundef %7, i32 noundef %1)
  %.not17 = icmp eq ptr %8, null
  br i1 %.not17, label %tailrecurse, label %.thread

tailrecurse:                                      ; preds = %5
  %9 = getelementptr inbounds i8, ptr %.tr24, i64 16
  %10 = load ptr, ptr %9, align 8, !tbaa !12
  %.not = icmp eq ptr %10, null
  br i1 %.not, label %.thread, label %.lr.ph

.thread:                                          ; preds = %.lr.ph, %tailrecurse, %5, %2
  %.2 = phi ptr [ null, %2 ], [ %8, %5 ], [ null, %tailrecurse ], [ %.tr24, %.lr.ph ]
  ret ptr %.2
}

attributes #0 = { nofree nosync nounwind 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" }

!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, !7, i64 0}
!6 = !{!"TreeNode", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!6, !10, i64 16}


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