[PATCH] D36506: [SelectionDAG] Allow constant folding for implicitly truncating BUILD_VECTOR nodes

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon accepted this revision.
RKSimon added a comment.
This revision is now accepted and ready to land.

LGTM. The duplication between this and FoldConstantVectorArithmetic suggests that a merging is overdue - add a TODO comment?


https://reviews.llvm.org/D36506