; LLVM IR from NVIDIA/DALI :: dali/util/mmaped_file.ll (ZN4dali16MmapedFileStream5CloseEv)

; 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.std::shared_ptr" = type { %"class.std::__shared_ptr" }
%"class.std::__shared_ptr" = type { ptr, %"class.std::__shared_count" }
%"class.std::__shared_count" = type { ptr }
%"class.dali::MmapedFileStream" = type <{ %"class.dali::FileStream", %"class.std::shared_ptr", i64, i64, i8, [7 x i8] }>
%"class.dali::FileStream" = type { %"class.dali::InputStream", %"class.std::__cxx11::basic_string" }
%"class.dali::InputStream" = type { ptr }
%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt10shared_ptrIvEaSEOS0_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN4dali16MmapedFileStream5CloseEv(ptr noundef nonnull align 8 dereferenceable(73) %0) unnamed_addr #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca %"class.std::shared_ptr", align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr %3) #2
  call void @_ZNSt10shared_ptrIvEC2EDn(ptr noundef nonnull align 8 dereferenceable(16) %3, ptr null) #2
  %5 = getelementptr inbounds %"class.dali::MmapedFileStream", ptr %4, i32 0, i32 1
  %6 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt10shared_ptrIvEaSEOS0_(ptr noundef nonnull align 8 dereferenceable(16) %5, ptr noundef nonnull align 8 dereferenceable(16) %3) #2
  call void @_ZNSt12__shared_ptrIvLN9__gnu_cxx12_Lock_policyE2EED2Ev(ptr noundef nonnull align 8 dereferenceable(16) %3) #2
  call void @llvm.lifetime.end.p0(i64 16, ptr %3) #2
  %7 = getelementptr inbounds %"class.dali::MmapedFileStream", ptr %4, i32 0, i32 2
  store i64 0, ptr %7, align 8, !tbaa !9
  %8 = getelementptr inbounds %"class.dali::MmapedFileStream", ptr %4, i32 0, i32 3
  store i64 0, ptr %8, align 8, !tbaa !20
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt10shared_ptrIvEC2EDn(ptr noundef nonnull align 8 dereferenceable(16), ptr) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt12__shared_ptrIvLN9__gnu_cxx12_Lock_policyE2EED2Ev(ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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, !15, i64 56}
!10 = !{!"_ZTSN4dali16MmapedFileStreamE", !11, i64 0, !16, i64 40, !15, i64 56, !15, i64 64, !19, i64 72}
!11 = !{!"_ZTSN4dali10FileStreamE", !12, i64 0, !13, i64 8}
!12 = !{!"_ZTSN4dali11InputStreamE"}
!13 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE", !14, i64 0, !15, i64 8, !7, i64 16}
!14 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_Alloc_hiderE", !6, i64 0}
!15 = !{!"long", !7, i64 0}
!16 = !{!"_ZTSSt10shared_ptrIvE", !17, i64 0}
!17 = !{!"_ZTSSt12__shared_ptrIvLN9__gnu_cxx12_Lock_policyE2EE", !6, i64 0, !18, i64 8}
!18 = !{!"_ZTSSt14__shared_countILN9__gnu_cxx12_Lock_policyE2EE", !6, i64 0}
!19 = !{!"bool", !7, i64 0}
!20 = !{!10, !15, i64 64}


; 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"

%"class.std::shared_ptr" = type { %"class.std::__shared_ptr" }
%"class.std::__shared_ptr" = type { ptr, %"class.std::__shared_count" }
%"class.std::__shared_count" = type { ptr }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt10shared_ptrIvEaSEOS0_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN4dali16MmapedFileStream5CloseEv(ptr noundef nonnull align 8 dereferenceable(73) %0) unnamed_addr #1 align 2 {
  %2 = alloca %"class.std::shared_ptr", align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #3
  call void @_ZNSt10shared_ptrIvEC2EDn(ptr noundef nonnull align 8 dereferenceable(16) %2, ptr null) #3
  %3 = getelementptr inbounds i8, ptr %0, i64 40
  %4 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt10shared_ptrIvEaSEOS0_(ptr noundef nonnull align 8 dereferenceable(16) %3, ptr noundef nonnull align 8 dereferenceable(16) %2) #3
  call void @_ZNSt12__shared_ptrIvLN9__gnu_cxx12_Lock_policyE2EED2Ev(ptr noundef nonnull align 8 dereferenceable(16) %2) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %2) #3
  %5 = getelementptr inbounds i8, ptr %0, i64 56
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %5, i8 0, i64 16, i1 false)
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt10shared_ptrIvEC2EDn(ptr noundef nonnull align 8 dereferenceable(16), ptr) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt12__shared_ptrIvLN9__gnu_cxx12_Lock_policyE2EED2Ev(ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #1 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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)"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,MemCpyOptPass,SROAPass