; LLVM IR from nsccgz-storage/nvlsm :: db/memtable.ll (ZN7leveldb8MemTable11NewIteratorEv)

; 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.leveldb::MemTable" = type { %"struct.leveldb::MemTable::KeyComparator", i32, %"class.leveldb::Arena", %"class.leveldb::SkipList" }
%"struct.leveldb::MemTable::KeyComparator" = type { %"class.leveldb::InternalKeyComparator" }
%"class.leveldb::InternalKeyComparator" = type { %"class.leveldb::Comparator", ptr }
%"class.leveldb::Comparator" = type { ptr }
%"class.leveldb::Arena" = type { ptr, i64, %"class.std::vector", %"struct.std::atomic" }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<char *, std::allocator<char *>>::_Vector_impl" }
%"struct.std::_Vector_base<char *, std::allocator<char *>>::_Vector_impl" = type { %"struct.std::_Vector_base<char *, std::allocator<char *>>::_Vector_impl_data" }
%"struct.std::_Vector_base<char *, std::allocator<char *>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.std::atomic" = type { %"struct.std::__atomic_base" }
%"struct.std::__atomic_base" = type { i64 }
%"class.leveldb::SkipList" = type { %"struct.leveldb::MemTable::KeyComparator", ptr, ptr, %"struct.std::atomic.0", %"class.leveldb::Random" }
%"struct.std::atomic.0" = type { %"struct.std::__atomic_base.1" }
%"struct.std::__atomic_base.1" = type { i32 }
%"class.leveldb::Random" = type { i32 }

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZN7leveldb8MemTable11NewIteratorEv(ptr noundef nonnull align 8 dereferenceable(112) %0) #0 align 2 personality ptr @__gxx_personality_v0 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  %6 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 88) #3
  %7 = getelementptr inbounds %"class.leveldb::MemTable", ptr %5, i32 0, i32 3
  invoke void @_ZN7leveldb16MemTableIteratorC2EPNS_8SkipListIPKcNS_8MemTable13KeyComparatorEEE(ptr noundef nonnull align 8 dereferenceable(88) %6, ptr noundef %7)
          to label %8 unwind label %9

8:                                                ; preds = %1
  ret ptr %6

9:                                                ; preds = %1
  %10 = landingpad { ptr, i32 }
          cleanup
  %11 = extractvalue { ptr, i32 } %10, 0
  store ptr %11, ptr %3, align 8
  %12 = extractvalue { ptr, i32 } %10, 1
  store i32 %12, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %6, i64 noundef 88) #4
  br label %13

13:                                               ; preds = %9
  %14 = load ptr, ptr %3, align 8
  %15 = load i32, ptr %4, align 4
  %16 = insertvalue { ptr, i32 } poison, ptr %14, 0
  %17 = insertvalue { ptr, i32 } %16, i32 %15, 1
  resume { ptr, i32 } %17
}

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7leveldb16MemTableIteratorC2EPNS_8SkipListIPKcNS_8MemTable13KeyComparatorEEE(ptr noundef nonnull align 8 dereferenceable(88), ptr noundef) unnamed_addr #0 align 2

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #2

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 = { nobuiltin allocsize(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 = { nobuiltin 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 = { builtin allocsize(0) }
attributes #4 = { builtin 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"}


; 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"

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull ptr @_ZN7leveldb8MemTable11NewIteratorEv(ptr noundef nonnull align 8 dereferenceable(112) %0) local_unnamed_addr #0 align 2 personality ptr @__gxx_personality_v0 {
  %2 = tail call noalias noundef nonnull dereferenceable(88) ptr @_Znwm(i64 noundef 88) #3
  %3 = getelementptr inbounds i8, ptr %0, i64 72
  invoke void @_ZN7leveldb16MemTableIteratorC2EPNS_8SkipListIPKcNS_8MemTable13KeyComparatorEEE(ptr noundef nonnull align 8 dereferenceable(88) %2, ptr noundef nonnull %3)
          to label %4 unwind label %5

4:                                                ; preds = %1
  ret ptr %2

5:                                                ; preds = %1
  %6 = landingpad { ptr, i32 }
          cleanup
  tail call void @_ZdlPvm(ptr noundef nonnull %2, i64 noundef 88) #4
  resume { ptr, i32 } %6
}

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7leveldb16MemTableIteratorC2EPNS_8SkipListIPKcNS_8MemTable13KeyComparatorEEE(ptr noundef nonnull align 8 dereferenceable(88), ptr noundef) unnamed_addr #0 align 2

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

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 = { nobuiltin allocsize(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 = { nobuiltin 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 = { builtin allocsize(0) }
attributes #4 = { builtin 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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass