; LLVM IR from Water-Melon/Melon :: src (mln_rbtree)

; 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.rbtree_s = type { ptr, ptr, ptr, ptr, ptr, %struct.mln_rbtree_node_s, ptr, ptr, ptr, ptr, ptr, i64, i8 }
%struct.mln_rbtree_node_s = type { ptr, ptr, ptr, ptr, ptr, ptr, i32 }

; 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
define dso_local ptr @mln_rbtree_successor(ptr noundef nonnull %0, ptr noundef nonnull %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %7 = load ptr, ptr %5, align 8, !tbaa !5
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.rbtree_s, ptr %8, i32 0, i32 5
  %10 = icmp ne ptr %7, %9
  br i1 %10, label %11, label %24

11:                                               ; preds = %2
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.mln_rbtree_node_s, ptr %12, i32 0, i32 5
  %14 = load ptr, ptr %13, align 8, !tbaa !9
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.rbtree_s, ptr %15, i32 0, i32 5
  %17 = icmp ne ptr %14, %16
  br i1 %17, label %18, label %24

18:                                               ; preds = %11
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.mln_rbtree_node_s, ptr %20, i32 0, i32 5
  %22 = load ptr, ptr %21, align 8, !tbaa !9
  %23 = call ptr @rbtree_minimum(ptr noundef %19, ptr noundef %22)
  store ptr %23, ptr %3, align 8
  br label %48

24:                                               ; preds = %11, %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.mln_rbtree_node_s, ptr %25, i32 0, i32 3
  %27 = load ptr, ptr %26, align 8, !tbaa !12
  store ptr %27, ptr %6, align 8, !tbaa !5
  br label %28

28:                                               ; preds = %41, %24
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.rbtree_s, ptr %30, i32 0, i32 5
  %32 = icmp ne ptr %29, %31
  br i1 %32, label %33, label %39

33:                                               ; preds = %28
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = load ptr, ptr %6, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.mln_rbtree_node_s, ptr %35, i32 0, i32 5
  %37 = load ptr, ptr %36, align 8, !tbaa !9
  %38 = icmp eq ptr %34, %37
  br label %39

39:                                               ; preds = %33, %28
  %40 = phi i1 [ false, %28 ], [ %38, %33 ]
  br i1 %40, label %41, label %46

41:                                               ; preds = %39
  %42 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %42, ptr %5, align 8, !tbaa !5
  %43 = load ptr, ptr %6, align 8, !tbaa !5
  %44 = getelementptr inbounds %struct.mln_rbtree_node_s, ptr %43, i32 0, i32 3
  %45 = load ptr, ptr %44, align 8, !tbaa !12
  store ptr %45, ptr %6, align 8, !tbaa !5
  br label %28, !llvm.loop !13

46:                                               ; preds = %39
  %47 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %47, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %48

48:                                               ; preds = %46, %18
  %49 = load ptr, ptr %3, align 8
  ret ptr %49
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden ptr @rbtree_minimum(ptr noundef nonnull, ptr noundef nonnull) #2

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 = { inlinehint 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 #3 = { 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, !6, i64 40}
!10 = !{!"mln_rbtree_node_s", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !11, i64 48, !11, i64 48}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 24}
!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
define dso_local ptr @mln_rbtree_successor(ptr noundef nonnull %0, ptr noundef nonnull readonly %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 40
  %.not = icmp eq ptr %3, %1
  br i1 %.not, label %.preheader, label %4

.preheader:                                       ; preds = %4, %2
  br label %9

4:                                                ; preds = %2
  %5 = getelementptr inbounds i8, ptr %1, i64 40
  %6 = load ptr, ptr %5, align 8, !tbaa !5
  %.not20 = icmp eq ptr %6, %3
  br i1 %.not20, label %.preheader, label %7

7:                                                ; preds = %4
  %8 = tail call ptr @rbtree_minimum(ptr noundef %0, ptr noundef %6)
  br label %.critedge

9:                                                ; preds = %.preheader, %10
  %.015 = phi ptr [ %.0, %10 ], [ %1, %.preheader ]
  %.0.in = getelementptr inbounds i8, ptr %.015, i64 24
  %.0 = load ptr, ptr %.0.in, align 8, !tbaa !11
  %.not21 = icmp eq ptr %.0, %3
  br i1 %.not21, label %.critedge, label %10

10:                                               ; preds = %9
  %11 = getelementptr inbounds i8, ptr %.0, i64 40
  %12 = load ptr, ptr %11, align 8, !tbaa !5
  %13 = icmp eq ptr %.015, %12
  br i1 %13, label %9, label %.critedge, !llvm.loop !12

.critedge:                                        ; preds = %10, %9, %7
  %.016 = phi ptr [ %8, %7 ], [ %.0, %9 ], [ %.0, %10 ]
  ret ptr %.016
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden ptr @rbtree_minimum(ptr noundef nonnull, ptr noundef nonnull) local_unnamed_addr #1

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" }
attributes #1 = { inlinehint 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 40}
!6 = !{!"mln_rbtree_node_s", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24, !7, i64 32, !7, i64 40, !10, i64 48, !10, i64 48}
!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 24}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


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