; LLVM IR from Dev-XYS/Algorithms :: Link-Cut-Tree.ll (ZN13link_cut_tree8find_topEi)

; 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.link_cut_tree = type { [200010 x [2 x i32]], [200010 x i32], [200010 x i32], [200010 x 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: mustprogress nounwind uwtable
declare dso_local void @_ZN13link_cut_tree5splayEii(ptr noundef nonnull align 4 dereferenceable(4000200), i32 noundef, i32 noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZN13link_cut_tree8find_topEi(ptr noundef nonnull align 4 dereferenceable(4000200) %0, i32 noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %6 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %7 = getelementptr inbounds %class.link_cut_tree, ptr %6, i32 0, i32 1
  %8 = load i32, ptr %4, align 4, !tbaa !9
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [200010 x i32], ptr %7, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !9
  store i32 %11, ptr %5, align 4, !tbaa !9
  br label %12

12:                                               ; preds = %20, %2
  %13 = getelementptr inbounds %class.link_cut_tree, ptr %6, i32 0, i32 0
  %14 = load i32, ptr %4, align 4, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [200010 x [2 x i32]], ptr %13, i64 0, i64 %15
  %17 = getelementptr inbounds [2 x i32], ptr %16, i64 0, i64 0
  %18 = load i32, ptr %17, align 4, !tbaa !9
  %19 = icmp ne i32 %18, 0
  br i1 %19, label %20, label %27

20:                                               ; preds = %12
  %21 = getelementptr inbounds %class.link_cut_tree, ptr %6, i32 0, i32 0
  %22 = load i32, ptr %4, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [200010 x [2 x i32]], ptr %21, i64 0, i64 %23
  %25 = getelementptr inbounds [2 x i32], ptr %24, i64 0, i64 0
  %26 = load i32, ptr %25, align 4, !tbaa !9
  store i32 %26, ptr %4, align 4, !tbaa !9
  br label %12, !llvm.loop !11

27:                                               ; preds = %12
  %28 = load i32, ptr %4, align 4, !tbaa !9
  %29 = load i32, ptr %5, align 4, !tbaa !9
  call void @_ZN13link_cut_tree5splayEii(ptr noundef nonnull align 4 dereferenceable(4000200) %6, i32 noundef %28, i32 noundef %29)
  %30 = load i32, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %30
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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: mustprogress nounwind uwtable
declare dso_local void @_ZN13link_cut_tree5splayEii(ptr noundef nonnull align 4 dereferenceable(4000200), i32 noundef, i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZN13link_cut_tree8find_topEi(ptr noundef nonnull align 4 dereferenceable(4000200) %0, i32 noundef %1) local_unnamed_addr #0 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 1600080
  %4 = sext i32 %1 to i64
  %5 = getelementptr inbounds [200010 x i32], ptr %3, i64 0, i64 %4
  %6 = load i32, ptr %5, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %7, %2
  %.0 = phi i32 [ %1, %2 ], [ %10, %7 ]
  %8 = sext i32 %.0 to i64
  %9 = getelementptr inbounds [200010 x [2 x i32]], ptr %0, i64 0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %.not = icmp eq i32 %10, 0
  br i1 %.not, label %11, label %7, !llvm.loop !9

11:                                               ; preds = %7
  tail call void @_ZN13link_cut_tree5splayEii(ptr noundef nonnull align 4 dereferenceable(4000200) %0, i32 noundef %.0, i32 noundef %6)
  ret i32 %.0
}

attributes #0 = { mustprogress 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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