llvm/llvm-project

[DAG] Add MVT:changeVectorElementCount and EVT::changeVectorElementCount

Aperta

#174.584 aperta il 6 gen 2026

 (9 commenti) (1 reazione) (1 assegnatario)C++ (10.782 fork)batch import
good first issuellvm:SelectionDAG

Metriche repository

Star
 (26.378 stelle)
Metriche merge PR
 (Metriche PR in attesa)

Descrizione

Similar to EVT::changeVectorElementType - but this will allow us to adjust the ElementCount on the fly.

We should assert that the original type was a vector already, but we will need to support Simple<->Extended transitions similar to EVT::changeVectorElementType.

There are a number of EVT::getVectorVT() calls in DAGCombine that would benefit from converting to changeVectorElementCount for clarity, but don't attempt to do too many in an initial patch

Guida contributor