Philip Reames b9c4733079 [DAG] Move one-use add of splat to base of scatter/gather
This extends the uniform base transform used with scatter/gather to support one-use vector adds-of-splats with a non-zero base. This has the effect of essentially reassociating an add from vector to scalar domain.

The motivation is to improve the lowering of scatter/gather operations fed by complex geps.

Differential Revision: https://reviews.llvm.org/D134472
2022-09-22 18:45:12 -07:00
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2022-09-11 16:11:41 -07:00