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

Predicate that matches sign‐mask APInt values.

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct is_sign_mask;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:llvm/PatternMatch/is_sign_mask/isValue.adoc[`isValue`] 
| Return true if `C` is a sign mask.
|===



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