[#llvm-appendLoopsToWorklist-03]
= xref:llvm.adoc[llvm]::appendLoopsToWorklist
:relfileprefix: ../
:mrdocs:

Append loops from a range onto a worklist in reverse postorder.

== Synopsis

Declared in `<llvm/Transforms/Utils/LoopUtils.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename RangeT>
void
appendLoopsToWorklist(
    RangeT&& Loops,
    xref:llvm/SmallPriorityWorklist.adoc[SmallPriorityWorklist<Loop*, 4>]& Worklist);
----

== Description

Utility that implements appending of loops onto a worklist given a range. We want to process loops in postorder, but the worklist is a LIFO data structure, so we append to it in _reverse_ postorder. For trees, a preorder traversal is a viable reverse postorder, so we actually append using a preorder walk algorithm.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *Loops*
| Range of loops to append.
| *Worklist*
| LIFO worklist that receives the loops.
|===


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