[PATCH] D116737: [DAG][AArch64][SVE] Fix VLS mulh code generation

[Paul Walker via Phabricator via llvm-commits]

paulwalker-arm added a comment.

Whilst not wrong this looks like something that should be canonicalised earlier.  Is it possible to add this logic to `SelectionDAG::getVectorShuffle()` and utilise `SelectionDAG::getConstant()`? I ask because there are several functions of `isConstOrConstSplat`'s ilk and we don't really want to have to add similar support to all of them.


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  https://reviews.llvm.org/D116737/new/

https://reviews.llvm.org/D116737