; LLVM IR from fmela/libdict :: src (tree_common)

; 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.tree_iterator = type { 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: nounwind uwtable
declare dso_local ptr @tree_node_next(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @tree_iterator_nextn(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %6, ptr %5, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %18, %2
  %8 = load ptr, ptr %5, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.tree_iterator, ptr %8, i32 0, i32 1
  %10 = load ptr, ptr %9, align 8, !tbaa !11
  %11 = icmp ne ptr %10, null
  br i1 %11, label %12, label %16

12:                                               ; preds = %7
  %13 = load i64, ptr %4, align 8, !tbaa !9
  %14 = add i64 %13, -1
  store i64 %14, ptr %4, align 8, !tbaa !9
  %15 = icmp ne i64 %13, 0
  br label %16

16:                                               ; preds = %12, %7
  %17 = phi i1 [ false, %7 ], [ %15, %12 ]
  br i1 %17, label %18, label %25

18:                                               ; preds = %16
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.tree_iterator, ptr %19, i32 0, i32 1
  %21 = load ptr, ptr %20, align 8, !tbaa !11
  %22 = call ptr @tree_node_next(ptr noundef %21)
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.tree_iterator, ptr %23, i32 0, i32 1
  store ptr %22, ptr %24, align 8, !tbaa !11
  br label %7, !llvm.loop !13

25:                                               ; preds = %16
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.tree_iterator, ptr %26, i32 0, i32 1
  %28 = load ptr, ptr %27, align 8, !tbaa !11
  %29 = icmp ne ptr %28, null
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i1 %29
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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" }
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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !6, i64 8}
!12 = !{!"", !6, i64 0, !6, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; 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: nounwind uwtable
declare dso_local ptr @tree_node_next(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @tree_iterator_nextn(ptr nocapture noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %.not7 = icmp eq ptr %4, null
  %.not68 = icmp eq i64 %1, 0
  %or.cond9 = or i1 %.not7, %.not68
  br i1 %or.cond9, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  %5 = phi ptr [ %7, %.lr.ph ], [ %4, %2 ]
  %.010 = phi i64 [ %6, %.lr.ph ], [ %1, %2 ]
  %6 = add i64 %.010, -1
  %7 = tail call ptr @tree_node_next(ptr noundef nonnull %5)
  store ptr %7, ptr %3, align 8, !tbaa !5
  %.not = icmp eq ptr %7, null
  %.not6 = icmp eq i64 %6, 0
  %or.cond = select i1 %.not, i1 true, i1 %.not6
  br i1 %or.cond, label %.critedge, label %.lr.ph, !llvm.loop !10

.critedge:                                        ; preds = %.lr.ph, %2
  %.lcssa = phi ptr [ %4, %2 ], [ %7, %.lr.ph ]
  %8 = icmp ne ptr %.lcssa, null
  ret i1 %8
}

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, !7, i64 8}
!6 = !{!"", !7, i64 0, !7, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


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