; LLVM IR from wuzhouhui/leetcode :: 47_permutation_II (permuteUnique)

; 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"

@p = external hidden global i32, align 4
@res = external hidden global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local ptr @permuteUnique(ptr noundef %0, i32 noundef %1, ptr noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  %8 = load i32, ptr %6, align 4, !tbaa !9
  %9 = icmp ne i32 %8, 0
  br i1 %9, label %12, label %10

10:                                               ; preds = %3
  %11 = load ptr, ptr %7, align 8, !tbaa !5
  store i32 0, ptr %11, align 4, !tbaa !9
  store ptr null, ptr %4, align 8
  br label %19

12:                                               ; preds = %3
  %13 = load i32, ptr %6, align 4, !tbaa !9
  call void @init(i32 noundef %13)
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = load i32, ptr %6, align 4, !tbaa !9
  call void @do_perm(ptr noundef %14, i32 noundef %15, i32 noundef 0)
  call void @deinit()
  %16 = load i32, ptr @p, align 4, !tbaa !9
  %17 = load ptr, ptr %7, align 8, !tbaa !5
  store i32 %16, ptr %17, align 4, !tbaa !9
  %18 = load ptr, ptr @res, align 8, !tbaa !5
  store ptr %18, ptr %4, align 8
  br label %19

19:                                               ; preds = %12, %10
  %20 = load ptr, ptr %4, align 8
  ret ptr %20
}

; Function Attrs: nounwind uwtable
declare hidden void @init(i32 noundef) #0

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

; Function Attrs: nounwind uwtable
declare hidden void @deinit() #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 = !{!"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"

@p = external hidden local_unnamed_addr global i32, align 4
@res = external hidden local_unnamed_addr global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local ptr @permuteUnique(ptr noundef %0, i32 noundef %1, ptr nocapture noundef writeonly %2) local_unnamed_addr #0 {
  %.not = icmp eq i32 %1, 0
  br i1 %.not, label %7, label %4

4:                                                ; preds = %3
  tail call void @init(i32 noundef %1)
  tail call void @do_perm(ptr noundef %0, i32 noundef %1, i32 noundef 0)
  tail call void @deinit()
  %5 = load i32, ptr @p, align 4, !tbaa !5
  %6 = load ptr, ptr @res, align 8, !tbaa !9
  br label %7

7:                                                ; preds = %3, %4
  %.sink = phi i32 [ %5, %4 ], [ 0, %3 ]
  %.0 = phi ptr [ %6, %4 ], [ null, %3 ]
  store i32 %.sink, ptr %2, align 4
  ret ptr %.0
}

; Function Attrs: nounwind uwtable
declare hidden void @init(i32 noundef) local_unnamed_addr #0

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

; Function Attrs: nounwind uwtable
declare hidden void @deinit() 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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}


; Effective O3 passes: GlobalOptPass,InstCombinePass,JumpThreadingPass,MergedLoadStoreMotionPass,PostOrderFunctionAttrsPass,SROAPass,TailCallElimPass