; LLVM IR from xxks-kkk/algo :: union-find/smart-union-with-path-compression (smartUnion)

; 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: nounwind uwtable
define dso_local i32 @find(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  %6 = load ptr, ptr %5, align 8, !tbaa !9
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds i32, ptr %6, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = icmp sle i32 %10, 0
  br i1 %11, label %12, label %14

12:                                               ; preds = %2
  %13 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %13, ptr %3, align 4
  br label %26

14:                                               ; preds = %2
  %15 = load ptr, ptr %5, align 8, !tbaa !9
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds i32, ptr %15, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = load ptr, ptr %5, align 8, !tbaa !9
  %21 = call i32 @find(i32 noundef %19, ptr noundef %20)
  %22 = load ptr, ptr %5, align 8, !tbaa !9
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr %22, i64 %24
  store i32 %21, ptr %25, align 4, !tbaa !5
  store i32 %21, ptr %3, align 4
  br label %26

26:                                               ; preds = %14, %12
  %27 = load i32, ptr %3, align 4
  ret i32 %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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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: nofree nosync nounwind memory(argmem: readwrite) uwtable
define dso_local i32 @find(i32 noundef %0, ptr nocapture noundef %1) local_unnamed_addr #0 {
  %3 = sext i32 %0 to i64
  %4 = getelementptr inbounds i32, ptr %1, i64 %3
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %6 = icmp slt i32 %5, 1
  br i1 %6, label %common.ret9, label %7

common.ret9:                                      ; preds = %2, %7
  %common.ret9.op = phi i32 [ %8, %7 ], [ %0, %2 ]
  ret i32 %common.ret9.op

7:                                                ; preds = %2
  %8 = tail call i32 @find(i32 noundef %5, ptr noundef nonnull %1)
  store i32 %8, ptr %4, align 4, !tbaa !5
  br label %common.ret9
}

attributes #0 = { nofree nosync nounwind memory(argmem: readwrite) 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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass