; LLVM IR from vczh/herodb :: Kernel/Source/Vlpp.ll (ZNK2vl6stream10FileStream8PositionEv)

; 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.vl::stream::FileStream" = type { %"class.vl::Object", i32, ptr, %"class.vl::stream::IStream" }
%"class.vl::Object" = type { ptr }
%"class.vl::stream::IStream" = type { %"class.vl::Interface" }
%"class.vl::Interface" = type { ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_ZNK2vl6stream10FileStream8PositionEv(ptr noundef nonnull align 8 dereferenceable(24) %0) unnamed_addr #0 align 2 {
  %2 = alloca i64, align 8
  %3 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %4 = load ptr, ptr %3, align 8
  %5 = getelementptr inbounds %"class.vl::stream::FileStream", ptr %4, i32 0, i32 2
  %6 = load ptr, ptr %5, align 8, !tbaa !9
  %7 = icmp ne ptr %6, null
  br i1 %7, label %8, label %12

8:                                                ; preds = %1
  %9 = getelementptr inbounds %"class.vl::stream::FileStream", ptr %4, i32 0, i32 2
  %10 = load ptr, ptr %9, align 8, !tbaa !9
  %11 = call i64 @ftell(ptr noundef %10)
  store i64 %11, ptr %2, align 8
  br label %13

12:                                               ; preds = %1
  store i64 -1, ptr %2, align 8
  br label %13

13:                                               ; preds = %12, %8
  %14 = load i64, ptr %2, align 8
  ret i64 %14
}

declare i64 @ftell(ptr noundef) #1

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" }
attributes #1 = { "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, !6, i64 16}
!10 = !{!"_ZTSN2vl6stream10FileStreamE", !11, i64 0, !12, i64 8, !6, i64 16}
!11 = !{!"_ZTSN2vl6ObjectE"}
!12 = !{!"_ZTSN2vl6stream10FileStream11AccessRightE", !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: mustprogress nofree nounwind uwtable
define dso_local noundef i64 @_ZNK2vl6stream10FileStream8PositionEv(ptr nocapture noundef nonnull readonly align 8 dereferenceable(24) %0) unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 16
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %6, label %4

4:                                                ; preds = %1
  %5 = tail call i64 @ftell(ptr noundef nonnull %3)
  br label %6

6:                                                ; preds = %1, %4
  %.0 = phi i64 [ %5, %4 ], [ -1, %1 ]
  ret i64 %.0
}

; Function Attrs: nofree nounwind
declare noundef i64 @ftell(ptr nocapture noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nofree 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 = { nofree 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" }

!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, !11, i64 16}
!6 = !{!"_ZTSN2vl6stream10FileStreamE", !7, i64 0, !8, i64 8, !11, i64 16}
!7 = !{!"_ZTSN2vl6ObjectE"}
!8 = !{!"_ZTSN2vl6stream10FileStream11AccessRightE", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = !{!"any pointer", !9, i64 0}


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