[#llvm-SchedBoundary-pickOnlyChoice]
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:mrdocs:

Return the sole available candidate, or null if there are several.

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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xref:llvm/SUnit.adoc[SUnit]*
pickOnlyChoice();
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== Description

Call this before applying any other heuristics to the Available queue. Updates the Available/Pending Q's if necessary and returns the single available instruction, or NULL if there are multiple candidates.

== Return Value

The sole available candidate, or null if there are several.


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