; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 14. Tree/count_node.ll (ZN4tree5countEP4node)

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

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN4tree5countEP4node(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef %1) #0 align 2 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %6 = load ptr, ptr %4, align 8
  %7 = load ptr, ptr %5, align 8, !tbaa !5
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %10

9:                                                ; preds = %2
  store i32 0, ptr %3, align 4
  br label %21

10:                                               ; preds = %2
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = getelementptr inbounds %class.node, ptr %11, i32 0, i32 1
  %13 = load ptr, ptr %12, align 8, !tbaa !9
  %14 = call noundef i32 @_ZN4tree5countEP4node(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef %13)
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = getelementptr inbounds %class.node, ptr %15, i32 0, i32 2
  %17 = load ptr, ptr %16, align 8, !tbaa !12
  %18 = call noundef i32 @_ZN4tree5countEP4node(ptr noundef nonnull align 8 dereferenceable(8) %6, ptr noundef %17)
  %19 = add nsw i32 %14, %18
  %20 = add nsw i32 %19, 1
  store i32 %20, ptr %3, align 4
  br label %21

21:                                               ; preds = %10, %9
  %22 = load i32, ptr %3, align 4
  ret i32 %22
}

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 willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_ZN4tree5countEP4node(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef readonly %1) local_unnamed_addr #0 align 2 {
  br label %tailrecurse

tailrecurse:                                      ; preds = %4, %2
  %accumulator.tr = phi i32 [ 0, %2 ], [ %11, %4 ]
  %.tr5 = phi ptr [ %1, %2 ], [ %9, %4 ]
  %3 = icmp eq ptr %.tr5, null
  br i1 %3, label %common.ret, label %4

common.ret:                                       ; preds = %tailrecurse
  %accumulator.ret.tr = add i32 0, %accumulator.tr
  ret i32 %accumulator.ret.tr

4:                                                ; preds = %tailrecurse
  %5 = getelementptr inbounds i8, ptr %.tr5, i64 8
  %6 = load ptr, ptr %5, align 8, !tbaa !5
  %7 = tail call noundef i32 @_ZN4tree5countEP4node(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef %6)
  %8 = getelementptr inbounds i8, ptr %.tr5, i64 16
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  %10 = add i32 %7, 1
  %11 = add i32 %10, %accumulator.tr
  br label %tailrecurse
}

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 = !{!"_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 = !{!6, !10, i64 16}


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