[#llvm-MapMetadata-0c]
= xref:llvm.adoc[llvm]::MapMetadata
:relfileprefix: ../
:mrdocs:

Version of MapMetadata with type safety for MDNode.

== Synopsis

Declared in `<llvm/Transforms/Utils/ValueMapper.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:llvm/MDNode.adoc[MDNode]*
MapMetadata(
    xref:llvm/MDNode.adoc[MDNode] const* MD,
    xref:llvm/ValueToValueMapTy.adoc[ValueToValueMapTy]& VM,
    xref:llvm/RemapFlags.adoc[RemapFlags] Flags = RF_None,
    xref:llvm/ValueMapTypeRemapper.adoc[ValueMapTypeRemapper]* TypeMapper = nullptr,
    xref:llvm/ValueMaterializer.adoc[ValueMaterializer]* Materializer = nullptr,
    xref:llvm/MetadataPredicate.adoc[MetadataPredicate] const* IdentityMD = nullptr);
----

== Return Value

The mapped metadata node.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *MD*
| Metadata node to look up or map.
| *VM*
| Mapping from original values to remapped values.
| *Flags*
| Remapping flags that control mapper behavior.
| *TypeMapper*
| Optional callback that remaps types while mapping values.
| *Materializer*
| Optional callback that materializes unmapped values.
| *IdentityMD*
| Optional predicate for metadata that maps onto itself.
|===


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