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

SelectionDAG type‐constraint kinds used by generated SDNode descriptions.

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
enum SDTC : uint8_t;
----

== Members

[cols="1,4"]
|===
| Name| Description
| `SDTCisVT` 
| Constrained value must have exactly the given value type.
| `SDTCisPtrTy` 
| Constrained value must have pointer type.
| `SDTCisInt` 
| Constrained value must have integer type.
| `SDTCisFP` 
| Constrained value must have floating‐point type.
| `SDTCisVec` 
| Constrained value must have vector type.
| `SDTCisSameAs` 
| Constrained value must have the same type as the constraining value.
| `SDTCisVTSmallerThanOp` 
| Constrained VT node must be smaller than the constraining operand.
| `SDTCisOpSmallerThanOp` 
| Constrained operand must be smaller than the constraining operand.
| `SDTCisEltOfVec` 
| Constrained value is a scalar element type of the constraining vector.
| `SDTCisSubVecOfVec` 
| Constrained value is a shorter subvector of the constraining vector.
| `SDTCVecEltisVT` 
| Constrained vector must have the given element type.
| `SDTCisSameNumEltsAs` 
| Constrained value must have the same element count as the constraining value.
| `SDTCisSameSizeAs` 
| Constrained value must have the same size as the constraining value.
|===



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