; LLVM IR from AllAlgorithms/c :: algorithms/data-structures (binary_search_tree)

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

@lcount = external dso_local global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local i32 @leafcount(ptr noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = icmp ne ptr %4, null
  br i1 %5, label %6, label %29

6:                                                ; preds = %1
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.tnode, ptr %7, i32 0, i32 1
  %9 = load ptr, ptr %8, align 8, !tbaa !9
  %10 = icmp eq ptr %9, null
  br i1 %10, label %11, label %19

11:                                               ; preds = %6
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.tnode, ptr %12, i32 0, i32 2
  %14 = load ptr, ptr %13, align 8, !tbaa !12
  %15 = icmp eq ptr %14, null
  br i1 %15, label %16, label %19

16:                                               ; preds = %11
  %17 = load i32, ptr @lcount, align 4, !tbaa !13
  %18 = add nsw i32 %17, 1
  store i32 %18, ptr @lcount, align 4, !tbaa !13
  br label %28

19:                                               ; preds = %11, %6
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.tnode, ptr %20, i32 0, i32 1
  %22 = load ptr, ptr %21, align 8, !tbaa !9
  %23 = call i32 @leafcount(ptr noundef %22)
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.tnode, ptr %24, i32 0, i32 2
  %26 = load ptr, ptr %25, align 8, !tbaa !12
  %27 = call i32 @leafcount(ptr noundef %26)
  br label %28

28:                                               ; preds = %19, %16
  br label %29

29:                                               ; preds = %28, %1
  %30 = load i32, ptr %2, align 4
  ret i32 %30
}

attributes #0 = { 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" }

!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, !6, i64 8}
!10 = !{!"tnode", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 16}
!13 = !{!11, !11, i64 0}


; 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"

@lcount = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: nofree nosync nounwind memory(readwrite, argmem: read, inaccessiblemem: none) uwtable
define dso_local i32 @leafcount(ptr noundef readonly %0) local_unnamed_addr #0 {
  %.not10 = icmp eq ptr %0, null
  br i1 %.not10, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %1, %tailrecurse
  %.tr11 = phi ptr [ %14, %tailrecurse ], [ %0, %1 ]
  %2 = getelementptr inbounds i8, ptr %.tr11, i64 8
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = icmp eq ptr %3, null
  br i1 %4, label %5, label %tailrecurse

5:                                                ; preds = %.lr.ph
  %6 = getelementptr inbounds i8, ptr %.tr11, i64 16
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %tailrecurse

9:                                                ; preds = %5
  %10 = load i32, ptr @lcount, align 4, !tbaa !12
  %11 = add nsw i32 %10, 1
  store i32 %11, ptr @lcount, align 4, !tbaa !12
  br label %.loopexit

tailrecurse:                                      ; preds = %5, %.lr.ph
  %12 = tail call i32 @leafcount(ptr noundef %3)
  %13 = getelementptr inbounds i8, ptr %.tr11, i64 16
  %14 = load ptr, ptr %13, align 8, !tbaa !11
  %.not = icmp eq ptr %14, null
  br i1 %.not, label %.loopexit, label %.lr.ph

.loopexit:                                        ; preds = %tailrecurse, %1, %9
  ret i32 undef
}

attributes #0 = { nofree nosync nounwind memory(readwrite, argmem: 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, !10, i64 8}
!6 = !{!"tnode", !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 16}
!12 = !{!7, !7, i64 0}


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