; LLVM IR from nsccgz-storage/nvlsm :: table/block.ll (ZN7leveldb5BlockD2Ev)

; 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::Block" = type <{ ptr, i64, i32, i8, [3 x i8] }>

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN7leveldb5BlockD2Ev(ptr noundef nonnull align 8 dereferenceable(21) %0) unnamed_addr #0 align 2 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8
  %4 = getelementptr inbounds %"class.leveldb::Block", ptr %3, i32 0, i32 3
  %5 = load i8, ptr %4, align 4, !tbaa !9, !range !14, !noundef !15
  %6 = trunc i8 %5 to i1
  br i1 %6, label %7, label %13

7:                                                ; preds = %1
  %8 = getelementptr inbounds %"class.leveldb::Block", ptr %3, i32 0, i32 0
  %9 = load ptr, ptr %8, align 8, !tbaa !16
  %10 = icmp eq ptr %9, null
  br i1 %10, label %12, label %11

11:                                               ; preds = %7
  call void @_ZdaPv(ptr noundef %9) #2
  br label %12

12:                                               ; preds = %11, %7
  br label %13

13:                                               ; preds = %12, %1
  ret void
}

; Function Attrs: nobuiltin nounwind
declare void @_ZdaPv(ptr noundef) #1

attributes #0 = { 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 = { 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 #2 = { 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"}
!9 = !{!10, !13, i64 20}
!10 = !{!"_ZTSN7leveldb5BlockE", !6, i64 0, !11, i64 8, !12, i64 16, !13, i64 20}
!11 = !{!"long", !7, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!"bool", !7, i64 0}
!14 = !{i8 0, i8 2}
!15 = !{}
!16 = !{!10, !6, 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 nounwind uwtable
define dso_local void @_ZN7leveldb5BlockD2Ev(ptr nocapture noundef nonnull readonly align 8 dereferenceable(21) %0) unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 20
  %3 = load i8, ptr %2, align 4, !tbaa !5, !range !13, !noundef !14
  %4 = trunc nuw i8 %3 to i1
  br i1 %4, label %5, label %9

5:                                                ; preds = %1
  %6 = load ptr, ptr %0, align 8, !tbaa !15
  %7 = icmp eq ptr %6, null
  br i1 %7, label %9, label %8

8:                                                ; preds = %5
  tail call void @_ZdaPv(ptr noundef nonnull %6) #2
  br label %9

9:                                                ; preds = %5, %8, %1
  ret void
}

; Function Attrs: nobuiltin nounwind
declare void @_ZdaPv(ptr noundef) local_unnamed_addr #1

attributes #0 = { 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 = { 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 #2 = { 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, !12, i64 20}
!6 = !{!"_ZTSN7leveldb5BlockE", !7, i64 0, !10, i64 8, !11, i64 16, !12, i64 20}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"int", !8, i64 0}
!12 = !{!"bool", !8, i64 0}
!13 = !{i8 0, i8 2}
!14 = !{}
!15 = !{!6, !7, i64 0}


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