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

Create a DAG mutation that constrains copies near their uses/defs.

== Synopsis

Declared in `<llvm/CodeGen/MachineScheduler.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::unique_ptr<ScheduleDAGMutation>
createCopyConstrainDAGMutation(
    xref:llvm/TargetInstrInfo.adoc[TargetInstrInfo] const* TII,
    xref:llvm/TargetRegisterInfo.adoc[TargetRegisterInfo] const* TRI);
----

== Return Value

A unique pointer to the copy‐constrain DAG mutation.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *TII*
| Target instruction info used to recognize copies.
| *TRI*
| Target register info used while rewriting edges.
|===


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