; LLVM IR from UtkarshPathrabe/Competitive-Coding :: Model Algorithms/Binary Search Tree (Find Triplet in BST)

; 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 void @_Z15convertBSTtoDLLP4nodePS0_S1_(ptr noundef %0, ptr noundef %1, ptr noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %10

9:                                                ; preds = %3
  br label %50

10:                                               ; preds = %3
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.node, ptr %11, i32 0, i32 1
  %13 = load ptr, ptr %12, align 8, !tbaa !9
  %14 = icmp ne ptr %13, null
  br i1 %14, label %15, label %21

15:                                               ; preds = %10
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.node, ptr %16, i32 0, i32 1
  %18 = load ptr, ptr %17, align 8, !tbaa !9
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  call void @_Z15convertBSTtoDLLP4nodePS0_S1_(ptr noundef %18, ptr noundef %19, ptr noundef %20)
  br label %21

21:                                               ; preds = %15, %10
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = load ptr, ptr %22, align 8, !tbaa !5
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.node, ptr %24, i32 0, i32 1
  store ptr %23, ptr %25, align 8, !tbaa !9
  %26 = load ptr, ptr %6, align 8, !tbaa !5
  %27 = load ptr, ptr %26, align 8, !tbaa !5
  %28 = icmp ne ptr %27, null
  br i1 %28, label %29, label %34

29:                                               ; preds = %21
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = load ptr, ptr %6, align 8, !tbaa !5
  %32 = load ptr, ptr %31, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.node, ptr %32, i32 0, i32 2
  store ptr %30, ptr %33, align 8, !tbaa !12
  br label %37

34:                                               ; preds = %21
  %35 = load ptr, ptr %4, align 8, !tbaa !5
  %36 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %35, ptr %36, align 8, !tbaa !5
  br label %37

37:                                               ; preds = %34, %29
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  %39 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %38, ptr %39, align 8, !tbaa !5
  %40 = load ptr, ptr %4, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.node, ptr %40, i32 0, i32 2
  %42 = load ptr, ptr %41, align 8, !tbaa !12
  %43 = icmp ne ptr %42, null
  br i1 %43, label %44, label %50

44:                                               ; preds = %37
  %45 = load ptr, ptr %4, align 8, !tbaa !5
  %46 = getelementptr inbounds %struct.node, ptr %45, i32 0, i32 2
  %47 = load ptr, ptr %46, align 8, !tbaa !12
  %48 = load ptr, ptr %5, align 8, !tbaa !5
  %49 = load ptr, ptr %6, align 8, !tbaa !5
  call void @_Z15convertBSTtoDLLP4nodePS0_S1_(ptr noundef %47, ptr noundef %48, ptr noundef %49)
  br label %50

50:                                               ; preds = %44, %37, %9
  ret void
}

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, !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 void @_Z15convertBSTtoDLLP4nodePS0_S1_(ptr noundef %0, ptr nocapture noundef writeonly %1, ptr nocapture noundef %2) local_unnamed_addr #0 {
  br label %tailrecurse

tailrecurse:                                      ; preds = %9, %3
  %.tr = phi ptr [ %0, %3 ], [ %13, %9 ]
  %4 = icmp eq ptr %.tr, null
  br i1 %4, label %14, label %5

5:                                                ; preds = %tailrecurse
  %6 = getelementptr inbounds i8, ptr %.tr, i64 8
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  %.not = icmp eq ptr %7, null
  br i1 %.not, label %9, label %8

8:                                                ; preds = %5
  tail call void @_Z15convertBSTtoDLLP4nodePS0_S1_(ptr noundef nonnull %7, ptr noundef %1, ptr noundef %2)
  br label %9

9:                                                ; preds = %8, %5
  %10 = load ptr, ptr %2, align 8, !tbaa !11
  store ptr %10, ptr %6, align 8, !tbaa !5
  %.not21 = icmp eq ptr %10, null
  %11 = getelementptr inbounds i8, ptr %10, i64 16
  %.sink = select i1 %.not21, ptr %1, ptr %11
  store ptr %.tr, ptr %.sink, align 8, !tbaa !11
  store ptr %.tr, ptr %2, align 8, !tbaa !11
  %12 = getelementptr inbounds i8, ptr %.tr, i64 16
  %13 = load ptr, ptr %12, align 8, !tbaa !12
  %.not22 = icmp eq ptr %13, null
  br i1 %.not22, label %14, label %tailrecurse

14:                                               ; preds = %tailrecurse, %9
  ret void
}

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, !10, i64 16}


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