[#llvm-RegAllocType]
= xref:llvm.adoc[llvm]::RegAllocType
:relfileprefix: ../
:mrdocs:

Identifies which register allocator the codegen pipeline should use.

== Synopsis

Declared in `<llvm/Target/CGPassBuilderOption.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
enum class RegAllocType : int;
----

== Members

[cols="1,4"]
|===
| Name| Description
| `Unset` 
| No allocator was specified.
| `Default` 
| Pick an allocator from the optimization level.
| `Basic` 
| The basic register allocator.
| `Fast` 
| The fast register allocator.
| `Greedy` 
| The greedy register allocator.
| `PBQP` 
| The Partitioned Boolean Quadratic Programming allocator.
|===



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