; LLVM IR from hlzz/libvot :: src/utils/data_structures.ll (ZN2tw9UnionFind4FindEm)

; 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.tw::UnionFind" = type { ptr, i64, i64 }

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_ZN2tw9UnionFind4FindEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %1) #0 align 2 {
  %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
  %5 = load ptr, ptr %3, align 8
  %6 = load i64, ptr %4, align 8, !tbaa !9
  %7 = getelementptr inbounds %"class.tw::UnionFind", ptr %5, i32 0, i32 0
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  %9 = load i64, ptr %4, align 8, !tbaa !9
  %10 = getelementptr inbounds i64, ptr %8, i64 %9
  %11 = load i64, ptr %10, align 8, !tbaa !9
  %12 = icmp ne i64 %6, %11
  br i1 %12, label %13, label %24

13:                                               ; preds = %2
  %14 = getelementptr inbounds %"class.tw::UnionFind", ptr %5, i32 0, i32 0
  %15 = load ptr, ptr %14, align 8, !tbaa !11
  %16 = load i64, ptr %4, align 8, !tbaa !9
  %17 = getelementptr inbounds i64, ptr %15, i64 %16
  %18 = load i64, ptr %17, align 8, !tbaa !9
  %19 = call noundef i64 @_ZN2tw9UnionFind4FindEm(ptr noundef nonnull align 8 dereferenceable(24) %5, i64 noundef %18)
  %20 = getelementptr inbounds %"class.tw::UnionFind", ptr %5, i32 0, i32 0
  %21 = load ptr, ptr %20, align 8, !tbaa !11
  %22 = load i64, ptr %4, align 8, !tbaa !9
  %23 = getelementptr inbounds i64, ptr %21, i64 %22
  store i64 %19, ptr %23, align 8, !tbaa !9
  br label %24

24:                                               ; preds = %13, %2
  %25 = getelementptr inbounds %"class.tw::UnionFind", ptr %5, i32 0, i32 0
  %26 = load ptr, ptr %25, align 8, !tbaa !11
  %27 = load i64, ptr %4, align 8, !tbaa !9
  %28 = getelementptr inbounds i64, ptr %26, i64 %27
  %29 = load i64, ptr %28, align 8, !tbaa !9
  ret i64 %29
}

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, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTSN2tw9UnionFindE", !6, i64 0, !10, i64 8, !10, 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 memory(readwrite, inaccessiblemem: none) uwtable
define dso_local noundef i64 @_ZN2tw9UnionFind4FindEm(ptr nocapture noundef nonnull readonly align 8 dereferenceable(24) %0, i64 noundef %1) local_unnamed_addr #0 align 2 {
  %3 = load ptr, ptr %0, align 8, !tbaa !5
  %4 = getelementptr inbounds i64, ptr %3, i64 %1
  %5 = load i64, ptr %4, align 8, !tbaa !11
  %.not = icmp eq i64 %5, %1
  br i1 %.not, label %common.ret, label %6

common.ret:                                       ; preds = %2, %6
  %common.ret.op = phi i64 [ %7, %6 ], [ %1, %2 ]
  ret i64 %common.ret.op

6:                                                ; preds = %2
  %7 = tail call noundef i64 @_ZN2tw9UnionFind4FindEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %5)
  %8 = load ptr, ptr %0, align 8, !tbaa !5
  %9 = getelementptr inbounds i64, ptr %8, i64 %1
  store i64 %7, ptr %9, align 8, !tbaa !11
  br label %common.ret
}

attributes #0 = { mustprogress nofree nosync nounwind memory(readwrite, 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, !7, i64 0}
!6 = !{!"_ZTSN2tw9UnionFindE", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!10, !10, i64 0}


; Effective O3 passes: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass