Craig Topper f499ec6b3d [RISCV] Add caching to the gather/scatter to strided load/store conversion. ...

If we have multiple gather/scatter instructions using the same the
same strided address we would scalarize it multiple times. I guess
a later pass cleans this up, but I don't know if that's guaranteed.

This patch adds a cache to remember the scalarization we already
created for a previous gather/scatter.

Reviewed By: frasercrmck

Differential Revision: https://reviews.llvm.org/D125326

2022-05-11 11:47:27 -07:00

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