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

Check if DstReg can be replaced with SrcReg depending on the register constraints.

== Synopsis

Declared in `<llvm/CodeGen/GlobalISel/Utils.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
canReplaceReg(
    xref:llvm/Register.adoc[Register] DstReg,
    xref:llvm/Register.adoc[Register] SrcReg,
    xref:llvm/MachineRegisterInfo.adoc[MachineRegisterInfo]& MRI);
----

== Return Value

True if `DstReg` can be replaced with `SrcReg.`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *DstReg*
| Destination register that would be replaced.
| *SrcReg*
| Source register proposed as the replacement.
| *MRI*
| Register information for the function.
|===


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