; LLVM IR from MakeContributions/DSA :: algorithms/C/tree (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.node = type { ptr, ptr, i32 }

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @is_full(ptr noundef %0) #0 {
  %2 = alloca i1, align 1
  %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 eq ptr %4, null
  br i1 %5, label %16, label %6

6:                                                ; preds = %1
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.node, ptr %7, i32 0, i32 0
  %9 = load ptr, ptr %8, align 8, !tbaa !9
  %10 = icmp eq ptr %9, null
  br i1 %10, label %11, label %17

11:                                               ; preds = %6
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.node, ptr %12, i32 0, i32 1
  %14 = load ptr, ptr %13, align 8, !tbaa !12
  %15 = icmp eq ptr %14, null
  br i1 %15, label %16, label %17

16:                                               ; preds = %11, %1
  store i1 true, ptr %2, align 1
  br label %41

17:                                               ; preds = %11, %6
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.node, ptr %18, i32 0, i32 0
  %20 = load ptr, ptr %19, align 8, !tbaa !9
  %21 = icmp ne ptr %20, null
  br i1 %21, label %22, label %39

22:                                               ; preds = %17
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.node, ptr %23, i32 0, i32 1
  %25 = load ptr, ptr %24, align 8, !tbaa !12
  %26 = icmp ne ptr %25, null
  br i1 %26, label %27, label %39

27:                                               ; preds = %22
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.node, ptr %28, i32 0, i32 0
  %30 = load ptr, ptr %29, align 8, !tbaa !9
  %31 = call zeroext i1 @is_full(ptr noundef %30)
  br i1 %31, label %32, label %37

32:                                               ; preds = %27
  %33 = load ptr, ptr %3, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.node, ptr %33, i32 0, i32 1
  %35 = load ptr, ptr %34, align 8, !tbaa !12
  %36 = call zeroext i1 @is_full(ptr noundef %35)
  br label %37

37:                                               ; preds = %32, %27
  %38 = phi i1 [ false, %27 ], [ %36, %32 ]
  store i1 %38, ptr %2, align 1
  br label %41

39:                                               ; preds = %22, %17
  br label %40

40:                                               ; preds = %39
  store i1 false, ptr %2, align 1
  br label %41

41:                                               ; preds = %40, %37, %16
  %42 = load i1, ptr %2, align 1
  ret i1 %42
}

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


; 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 zeroext i1 @is_full(ptr noundef readonly %0) local_unnamed_addr #0 {
  br label %tailrecurse

tailrecurse:                                      ; preds = %9, %1
  %.tr = phi ptr [ %0, %1 ], [ %7, %9 ]
  %2 = icmp eq ptr %.tr, null
  br i1 %2, label %.thread, label %3

3:                                                ; preds = %tailrecurse
  %4 = load ptr, ptr %.tr, align 8, !tbaa !5
  %5 = icmp eq ptr %4, null
  %6 = getelementptr inbounds i8, ptr %.tr, i64 8
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  %8 = icmp eq ptr %7, null
  %brmerge = select i1 %5, i1 true, i1 %8
  br i1 %brmerge, label %.thread.split.loop.exit, label %9

9:                                                ; preds = %3
  %10 = tail call zeroext i1 @is_full(ptr noundef nonnull %4)
  br i1 %10, label %tailrecurse, label %.thread

.thread.split.loop.exit:                          ; preds = %3
  %.mux.le = select i1 %5, i1 %8, i1 %2
  br label %.thread

.thread:                                          ; preds = %tailrecurse, %9, %.thread.split.loop.exit
  %.0 = phi i1 [ %.mux.le, %.thread.split.loop.exit ], [ %2, %9 ], [ %2, %tailrecurse ]
  ret i1 %.0
}

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


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass