[#llvm-OperandTraits-042]
= xref:llvm.adoc[llvm]::xref:llvm/OperandTraits-0f9.adoc[OperandTraits]<xref:llvm/PHINode.adoc[PHINode]>
:relfileprefix: ../
:mrdocs:

Operand layout traits for PHINode.

== Synopsis

Declared in `<llvm/IR/Instructions.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<>
struct xref:llvm/OperandTraits-0f9.adoc[OperandTraits]<xref:llvm/PHINode.adoc[PHINode]>
    : xref:llvm/HungoffOperandTraits.adoc[HungoffOperandTraits]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:llvm/HungoffOperandTraits.adoc[HungoffOperandTraits]`
| HungoffOperandTraits ‐ determine the allocation regime of the Use array when it is not a prefix to the User object, but allocated at an unrelated heap address.
|===

== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:llvm/HungoffOperandTraits/op_begin.adoc[`op_begin`] 
| Return a pointer to the first hung‐off operand `Use` for `U.`
| xref:llvm/HungoffOperandTraits/op_end.adoc[`op_end`] 
| Return a pointer past the last hung‐off operand `Use` for `U.`
| xref:llvm/HungoffOperandTraits/operands.adoc[`operands`] 
| Return the number of operands of `U.`
|===



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