; LLVM IR from fmela/libdict :: src (hb_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.hb_itor = type { ptr, ptr }

; Function Attrs: nounwind uwtable
declare hidden ptr @node_next(ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @hb_itor_nextn(ptr noundef %0, i64 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  br label %5

5:                                                ; preds = %16, %2
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.hb_itor, ptr %6, i32 0, i32 1
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  %9 = icmp ne ptr %8, null
  br i1 %9, label %10, label %14

10:                                               ; preds = %5
  %11 = load i64, ptr %4, align 8, !tbaa !9
  %12 = add i64 %11, -1
  store i64 %12, ptr %4, align 8, !tbaa !9
  %13 = icmp ne i64 %11, 0
  br label %14

14:                                               ; preds = %10, %5
  %15 = phi i1 [ false, %5 ], [ %13, %10 ]
  br i1 %15, label %16, label %23

16:                                               ; preds = %14
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.hb_itor, ptr %17, i32 0, i32 1
  %19 = load ptr, ptr %18, align 8, !tbaa !11
  %20 = call ptr @node_next(ptr noundef %19)
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.hb_itor, ptr %21, i32 0, i32 1
  store ptr %20, ptr %22, align 8, !tbaa !11
  br label %5, !llvm.loop !13

23:                                               ; preds = %14
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.hb_itor, ptr %24, i32 0, i32 1
  %26 = load ptr, ptr %25, align 8, !tbaa !11
  %27 = icmp ne ptr %26, null
  ret i1 %27
}

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, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !6, i64 8}
!12 = !{!"hb_itor", !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 hidden ptr @node_next(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @hb_itor_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
  %.not6 = icmp eq ptr %4, null
  %.not57 = icmp eq i64 %1, 0
  %or.cond8 = or i1 %.not6, %.not57
  br i1 %or.cond8, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  %5 = phi ptr [ %7, %.lr.ph ], [ %4, %2 ]
  %.09 = phi i64 [ %6, %.lr.ph ], [ %1, %2 ]
  %6 = add i64 %.09, -1
  %7 = tail call ptr @node_next(ptr noundef nonnull %5)
  store ptr %7, ptr %3, align 8, !tbaa !5
  %.not = icmp eq ptr %7, null
  %.not5 = icmp eq i64 %6, 0
  %or.cond = select i1 %.not, i1 true, i1 %.not5
  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 = !{!"hb_itor", !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,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass