; LLVM IR from edualgo/dsa-code-store :: Binary-Tree/Binary-Tree-master/Source/main.ll (Z8numNodesP14BinaryTreeNodeIiE)

; 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"

%class.BinaryTreeNode = 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: mustprogress uwtable
define dso_local noundef i32 @_Z8numNodesP14BinaryTreeNodeIiE(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = icmp eq ptr %5, null
  br i1 %6, label %7, label %8

7:                                                ; preds = %1
  store i32 0, ptr %2, align 4
  br label %20

8:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 1, ptr %4, align 4, !tbaa !9
  %9 = load i32, ptr %4, align 4, !tbaa !9
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = getelementptr inbounds %class.BinaryTreeNode, ptr %10, i32 0, i32 1
  %12 = load ptr, ptr %11, align 8, !tbaa !11
  %13 = call noundef i32 @_Z8numNodesP14BinaryTreeNodeIiE(ptr noundef %12)
  %14 = add nsw i32 %9, %13
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %class.BinaryTreeNode, ptr %15, i32 0, i32 2
  %17 = load ptr, ptr %16, align 8, !tbaa !13
  %18 = call noundef i32 @_Z8numNodesP14BinaryTreeNodeIiE(ptr noundef %17)
  %19 = add nsw i32 %14, %18
  store i32 %19, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %20

20:                                               ; preds = %8, %7
  %21 = load i32, ptr %2, align 4
  ret i32 %21
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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" }
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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 8}
!12 = !{!"_ZTS14BinaryTreeNodeIiE", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!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: mustprogress nofree nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z8numNodesP14BinaryTreeNodeIiE(ptr noundef readonly %0) local_unnamed_addr #0 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %tailrecurse._crit_edge, label %tailrecurse

tailrecurse:                                      ; preds = %1, %tailrecurse
  %.tr6 = phi ptr [ %7, %tailrecurse ], [ %0, %1 ]
  %accumulator.tr5 = phi i32 [ %9, %tailrecurse ], [ 0, %1 ]
  %3 = getelementptr inbounds i8, ptr %.tr6, i64 8
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = tail call noundef i32 @_Z8numNodesP14BinaryTreeNodeIiE(ptr noundef %4)
  %6 = getelementptr inbounds i8, ptr %.tr6, i64 16
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  %8 = add i32 %accumulator.tr5, 1
  %9 = add i32 %8, %5
  %10 = icmp eq ptr %7, null
  br i1 %10, label %tailrecurse._crit_edge, label %tailrecurse

tailrecurse._crit_edge:                           ; preds = %tailrecurse, %1
  %accumulator.tr.lcssa = phi i32 [ 0, %1 ], [ %9, %tailrecurse ]
  ret i32 %accumulator.tr.lcssa
}

attributes #0 = { mustprogress nofree nosync nounwind willreturn 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, !10, i64 8}
!6 = !{!"_ZTS14BinaryTreeNodeIiE", !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 = !{!6, !10, i64 16}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass