; LLVM IR from vczh/herodb :: Kernel/Source/Utility/FileBuffer.ll (ZN2vl8database15buffer_internal13FileFreePagesC2Em)

; 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::database::buffer_internal::FileFreePages" = type { %"class.vl::Object", i64, %"class.vl::collections::List.8", i64, i64, ptr, ptr }
%"class.vl::Object" = type { ptr }
%"class.vl::collections::List.8" = type { %"class.vl::collections::ListBase.base", %"class.vl::collections::IEnumerable" }
%"class.vl::collections::ListBase.base" = type <{ %"class.vl::collections::ArrayBase.base", i64, i8 }>
%"class.vl::collections::ArrayBase.base" = type { %"class.vl::collections::ListStore", ptr, i64 }
%"class.vl::collections::ListStore" = type { %"class.vl::Object" }
%"class.vl::collections::IEnumerable" = type { %"class.vl::Interface" }
%"class.vl::Interface" = type { ptr }

@_ZTVN2vl8database15buffer_internal13FileFreePagesE = external dso_local unnamed_addr constant { [4 x ptr] }, align 8

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN2vl6ObjectC2Ev(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN2vl11collections4ListImmEC1Ev(ptr noundef nonnull align 8 dereferenceable(33)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN2vl8database15buffer_internal13FileFreePagesC2Em(ptr noundef nonnull align 8 dereferenceable(96) %0, i64 noundef %1) unnamed_addr #1 align 2 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  %7 = load ptr, ptr %3, align 8
  call void @_ZN2vl6ObjectC2Ev(ptr noundef nonnull align 8 dereferenceable(8) %7) #3
  store ptr getelementptr inbounds inrange(-16, 16) ({ [4 x ptr] }, ptr @_ZTVN2vl8database15buffer_internal13FileFreePagesE, i32 0, i32 0, i32 2), ptr %7, align 8, !tbaa !11
  %8 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %7, i32 0, i32 1
  %9 = load i64, ptr %4, align 8, !tbaa !9
  store i64 %9, ptr %8, align 8, !tbaa !13
  %10 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %7, i32 0, i32 2
  invoke void @_ZN2vl11collections4ListImmEC1Ev(ptr noundef nonnull align 8 dereferenceable(33) %10)
          to label %11 unwind label %19

11:                                               ; preds = %2
  %12 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %7, i32 0, i32 3
  store i64 -1, ptr %12, align 8, !tbaa !21
  %13 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %7, i32 0, i32 4
  %14 = load i64, ptr %4, align 8, !tbaa !9
  %15 = sub i64 %14, 16
  %16 = udiv i64 %15, 8
  store i64 %16, ptr %13, align 8, !tbaa !22
  %17 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %7, i32 0, i32 5
  store ptr null, ptr %17, align 8, !tbaa !23
  %18 = getelementptr inbounds %"class.vl::database::buffer_internal::FileFreePages", ptr %7, i32 0, i32 6
  store ptr null, ptr %18, align 8, !tbaa !24
  ret void

19:                                               ; preds = %2
  %20 = landingpad { ptr, i32 }
          cleanup
  %21 = extractvalue { ptr, i32 } %20, 0
  store ptr %21, ptr %5, align 8
  %22 = extractvalue { ptr, i32 } %20, 1
  store i32 %22, ptr %6, align 4
  call void @_ZN2vl6ObjectD2Ev(ptr noundef nonnull align 8 dereferenceable(8) %7) #3
  br label %23

23:                                               ; preds = %19
  %24 = load ptr, ptr %5, align 8
  %25 = load i32, ptr %6, align 4
  %26 = insertvalue { ptr, i32 } poison, ptr %24, 0
  %27 = insertvalue { ptr, i32 } %26, i32 %25, 1
  resume { ptr, i32 } %27
}

; Function Attrs: nounwind
declare void @_ZN2vl6ObjectD2Ev(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #2

attributes #0 = { inlinehint mustprogress 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 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 "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 }

!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, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"vtable pointer", !8, i64 0}
!13 = !{!14, !10, i64 8}
!14 = !{!"_ZTSN2vl8database15buffer_internal13FileFreePagesE", !15, i64 0, !10, i64 8, !16, i64 16, !10, i64 64, !10, i64 72, !6, i64 80, !6, i64 88}
!15 = !{!"_ZTSN2vl6ObjectE"}
!16 = !{!"_ZTSN2vl11collections4ListImmEE", !17, i64 0}
!17 = !{!"_ZTSN2vl11collections8ListBaseImmEE", !18, i64 0, !10, i64 24, !20, i64 32}
!18 = !{!"_ZTSN2vl11collections9ArrayBaseImEE", !19, i64 0, !6, i64 8, !10, i64 16}
!19 = !{!"_ZTSN2vl11collections9ListStoreImLb1EEE", !15, i64 0}
!20 = !{!"bool", !7, i64 0}
!21 = !{!14, !10, i64 64}
!22 = !{!14, !10, i64 72}
!23 = !{!14, !6, i64 80}
!24 = !{!14, !6, i64 88}


; 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"

@_ZTVN2vl8database15buffer_internal13FileFreePagesE = external dso_local unnamed_addr constant { [4 x ptr] }, align 8

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN2vl6ObjectC2Ev(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN2vl11collections4ListImmEC1Ev(ptr noundef nonnull align 8 dereferenceable(33)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN2vl8database15buffer_internal13FileFreePagesC2Em(ptr noundef nonnull align 8 dereferenceable(96) %0, i64 noundef %1) unnamed_addr #1 align 2 personality ptr @__gxx_personality_v0 {
  tail call void @_ZN2vl6ObjectC2Ev(ptr noundef nonnull align 8 dereferenceable(8) %0) #4
  store ptr getelementptr inbounds inrange(-16, 16) (i8, ptr @_ZTVN2vl8database15buffer_internal13FileFreePagesE, i64 16), ptr %0, align 8, !tbaa !5
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  store i64 %1, ptr %3, align 8, !tbaa !8
  %4 = getelementptr inbounds i8, ptr %0, i64 16
  invoke void @_ZN2vl11collections4ListImmEC1Ev(ptr noundef nonnull align 8 dereferenceable(33) %4)
          to label %5 unwind label %11

5:                                                ; preds = %2
  %6 = getelementptr inbounds i8, ptr %0, i64 64
  store i64 -1, ptr %6, align 8, !tbaa !19
  %7 = getelementptr inbounds i8, ptr %0, i64 72
  %8 = add i64 %1, -16
  %9 = lshr i64 %8, 3
  store i64 %9, ptr %7, align 8, !tbaa !20
  %10 = getelementptr inbounds i8, ptr %0, i64 80
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %10, i8 0, i64 16, i1 false)
  ret void

11:                                               ; preds = %2
  %12 = landingpad { ptr, i32 }
          cleanup
  tail call void @_ZN2vl6ObjectD2Ev(ptr noundef nonnull align 8 dereferenceable(8) %0) #4
  resume { ptr, i32 } %12
}

; Function Attrs: nounwind
declare void @_ZN2vl6ObjectD2Ev(ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

attributes #0 = { inlinehint mustprogress 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 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 "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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !11, i64 8}
!9 = !{!"_ZTSN2vl8database15buffer_internal13FileFreePagesE", !10, i64 0, !11, i64 8, !13, i64 16, !11, i64 64, !11, i64 72, !17, i64 80, !17, i64 88}
!10 = !{!"_ZTSN2vl6ObjectE"}
!11 = !{!"long", !12, i64 0}
!12 = !{!"omnipotent char", !7, i64 0}
!13 = !{!"_ZTSN2vl11collections4ListImmEE", !14, i64 0}
!14 = !{!"_ZTSN2vl11collections8ListBaseImmEE", !15, i64 0, !11, i64 24, !18, i64 32}
!15 = !{!"_ZTSN2vl11collections9ArrayBaseImEE", !16, i64 0, !17, i64 8, !11, i64 16}
!16 = !{!"_ZTSN2vl11collections9ListStoreImLb1EEE", !10, i64 0}
!17 = !{!"any pointer", !12, i64 0}
!18 = !{!"bool", !12, i64 0}
!19 = !{!9, !11, i64 64}
!20 = !{!9, !11, i64 72}


; Effective O3 passes: EarlyCSEPass,InstCombinePass,MemCpyOptPass,SROAPass,SimplifyCFGPass,TailCallElimPass