; LLVM IR from priyankchheda/algorithms :: _other_languages/c_language/dynamic_connectivity/quick_union (quick_union)

; 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"

; 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 void @join_union(ptr noundef %0, ptr noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4) #1 {
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store i32 %2, ptr %8, align 4, !tbaa !9
  store i32 %3, ptr %9, align 4, !tbaa !9
  store i32 %4, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = load i32, ptr %9, align 4, !tbaa !9
  %16 = call i32 @root(ptr noundef %14, i32 noundef %15)
  store i32 %16, ptr %11, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #2
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = load i32, ptr %10, align 4, !tbaa !9
  %19 = call i32 @root(ptr noundef %17, i32 noundef %18)
  store i32 %19, ptr %12, align 4, !tbaa !9
  %20 = load i32, ptr %11, align 4, !tbaa !9
  %21 = load i32, ptr %12, align 4, !tbaa !9
  %22 = icmp eq i32 %20, %21
  br i1 %22, label %23, label %24

23:                                               ; preds = %5
  store i32 1, ptr %13, align 4
  br label %71

24:                                               ; preds = %5
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = load i32, ptr %11, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i32, ptr %25, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !9
  %30 = load ptr, ptr %7, align 8, !tbaa !5
  %31 = load i32, ptr %12, align 4, !tbaa !9
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds i32, ptr %30, i64 %32
  %34 = load i32, ptr %33, align 4, !tbaa !9
  %35 = icmp sgt i32 %29, %34
  br i1 %35, label %36, label %53

36:                                               ; preds = %24
  %37 = load i32, ptr %11, align 4, !tbaa !9
  %38 = load ptr, ptr %6, align 8, !tbaa !5
  %39 = load i32, ptr %12, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds i32, ptr %38, i64 %40
  store i32 %37, ptr %41, align 4, !tbaa !9
  %42 = load ptr, ptr %7, align 8, !tbaa !5
  %43 = load i32, ptr %11, align 4, !tbaa !9
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds i32, ptr %42, i64 %44
  %46 = load i32, ptr %45, align 4, !tbaa !9
  %47 = load ptr, ptr %7, align 8, !tbaa !5
  %48 = load i32, ptr %12, align 4, !tbaa !9
  %49 = sext i32 %48 to i64
  %50 = getelementptr inbounds i32, ptr %47, i64 %49
  %51 = load i32, ptr %50, align 4, !tbaa !9
  %52 = add nsw i32 %51, %46
  store i32 %52, ptr %50, align 4, !tbaa !9
  br label %70

53:                                               ; preds = %24
  %54 = load i32, ptr %12, align 4, !tbaa !9
  %55 = load ptr, ptr %6, align 8, !tbaa !5
  %56 = load i32, ptr %11, align 4, !tbaa !9
  %57 = sext i32 %56 to i64
  %58 = getelementptr inbounds i32, ptr %55, i64 %57
  store i32 %54, ptr %58, align 4, !tbaa !9
  %59 = load ptr, ptr %7, align 8, !tbaa !5
  %60 = load i32, ptr %12, align 4, !tbaa !9
  %61 = sext i32 %60 to i64
  %62 = getelementptr inbounds i32, ptr %59, i64 %61
  %63 = load i32, ptr %62, align 4, !tbaa !9
  %64 = load ptr, ptr %7, align 8, !tbaa !5
  %65 = load i32, ptr %11, align 4, !tbaa !9
  %66 = sext i32 %65 to i64
  %67 = getelementptr inbounds i32, ptr %64, i64 %66
  %68 = load i32, ptr %67, align 4, !tbaa !9
  %69 = add nsw i32 %68, %63
  store i32 %69, ptr %67, align 4, !tbaa !9
  br label %70

70:                                               ; preds = %53, %36
  store i32 0, ptr %13, align 4
  br label %71

71:                                               ; preds = %70, %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  %72 = load i32, ptr %13, align 4
  switch i32 %72, label %74 [
    i32 0, label %73
    i32 1, label %73
  ]

73:                                               ; preds = %71, %71
  ret void

74:                                               ; preds = %71
  unreachable
}

; Function Attrs: nounwind uwtable
declare hidden i32 @root(ptr noundef, i32 noundef) #1

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 = !{!"int", !7, i64 0}


; 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 void @join_union(ptr noundef %0, ptr nocapture noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4) local_unnamed_addr #0 {
  %6 = tail call i32 @root(ptr noundef %0, i32 noundef %3)
  %7 = tail call i32 @root(ptr noundef %0, i32 noundef %4)
  %8 = icmp eq i32 %6, %7
  br i1 %8, label %20, label %.sink.split

.sink.split:                                      ; preds = %5
  %9 = sext i32 %6 to i64
  %10 = getelementptr inbounds i32, ptr %1, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = sext i32 %7 to i64
  %13 = getelementptr inbounds i32, ptr %1, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = icmp sgt i32 %11, %14
  %. = select i1 %15, i64 %12, i64 %9
  %.31 = select i1 %15, i32 %6, i32 %7
  %.33 = select i1 %15, ptr %13, ptr %10
  %16 = getelementptr inbounds i32, ptr %0, i64 %.
  store i32 %.31, ptr %16, align 4, !tbaa !5
  %.val = load i32, ptr %10, align 4
  %.val34 = load i32, ptr %13, align 4
  %17 = select i1 %15, i32 %.val, i32 %.val34
  %18 = load i32, ptr %.33, align 4, !tbaa !5
  %19 = add nsw i32 %18, %17
  store i32 %19, ptr %.33, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %.sink.split, %5
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden i32 @root(ptr noundef, i32 noundef) local_unnamed_addr #0

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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