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

Matches a call to the llvm.ctlz intrinsic.

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    typename Opnd0,
    typename Opnd1>
auto
m_Ctlz(
    Opnd0 const& Op0,
    Opnd1 const& Op1);
----

== Return Value

A matcher for a call to the llvm.ctlz intrinsic.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *Op0*
| Operand matcher for the value.
| *Op1*
| Operand matcher for the is_zero_poison flag.
|===


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