; LLVM IR from kmxz/overlayfs-tools :: logic (is_opaque)

; 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"

@ovl_opaque_xattr = external dso_local global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local i32 @is_opaque(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i8, align 1
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = load ptr, ptr @ovl_opaque_xattr, align 8, !tbaa !5
  %11 = call i64 @getxattr(ptr noundef %9, ptr noundef %10, ptr noundef %6, i64 noundef 1) #4
  store i64 %11, ptr %7, align 8, !tbaa !9
  %12 = load i64, ptr %7, align 8, !tbaa !9
  %13 = icmp slt i64 %12, 0
  br i1 %13, label %14, label %19

14:                                               ; preds = %2
  %15 = call ptr @__errno_location() #5
  %16 = load i32, ptr %15, align 4, !tbaa !11
  %17 = icmp ne i32 %16, 61
  br i1 %17, label %18, label %19

18:                                               ; preds = %14
  store i32 -1, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %30

19:                                               ; preds = %14, %2
  %20 = load i64, ptr %7, align 8, !tbaa !9
  %21 = icmp eq i64 %20, 1
  br i1 %21, label %22, label %26

22:                                               ; preds = %19
  %23 = load i8, ptr %6, align 1, !tbaa !13
  %24 = sext i8 %23 to i32
  %25 = icmp eq i32 %24, 121
  br label %26

26:                                               ; preds = %22, %19
  %27 = phi i1 [ false, %19 ], [ %25, %22 ]
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = zext i1 %27 to i8
  store i8 %29, ptr %28, align 1, !tbaa !14
  store i32 0, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %30

30:                                               ; preds = %26, %18
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #4
  %31 = load i32, ptr %3, align 4
  ret i32 %31
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind
declare i64 @getxattr(ptr noundef, ptr noundef, ptr noundef, i64 noundef) #2

; Function Attrs: nounwind willreturn memory(none)
declare ptr @__errno_location() #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind "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 #3 = { nounwind willreturn memory(none) "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 #4 = { nounwind }
attributes #5 = { nounwind willreturn memory(none) }

!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 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!7, !7, i64 0}
!14 = !{!15, !15, i64 0}
!15 = !{!"_Bool", !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"

@ovl_opaque_xattr = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 1) i32 @is_opaque(ptr noundef %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #0 {
  %3 = alloca i8, align 1
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %3) #4
  %4 = load ptr, ptr @ovl_opaque_xattr, align 8, !tbaa !5
  %5 = call i64 @getxattr(ptr noundef %0, ptr noundef %4, ptr noundef nonnull %3, i64 noundef 1) #4
  %6 = icmp slt i64 %5, 0
  br i1 %6, label %7, label %10

7:                                                ; preds = %2
  %8 = tail call ptr @__errno_location() #5
  %9 = load i32, ptr %8, align 4, !tbaa !9
  %.not = icmp eq i32 %9, 61
  br i1 %.not, label %10, label %16

10:                                               ; preds = %7, %2
  %11 = icmp eq i64 %5, 1
  %12 = load i8, ptr %3, align 1
  %13 = icmp eq i8 %12, 121
  %14 = select i1 %11, i1 %13, i1 false
  %15 = zext i1 %14 to i8
  store i8 %15, ptr %1, align 1, !tbaa !11
  br label %16

16:                                               ; preds = %7, %10
  %.0 = phi i32 [ 0, %10 ], [ -1, %7 ]
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %3) #4
  ret i32 %.0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind
declare i64 @getxattr(ptr noundef, ptr noundef, ptr noundef, i64 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
declare ptr @__errno_location() local_unnamed_addr #3

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind "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 #3 = { mustprogress nofree nosync nounwind willreturn memory(none) "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 #4 = { nounwind }
attributes #5 = { nounwind willreturn memory(none) }

!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}
!11 = !{!12, !12, i64 0}
!12 = !{!"_Bool", !7, i64 0}


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