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[Power9] Disable removing extra swaps on P9.

Description

[Power9] Disable removing extra swaps on P9.

On power 8 we sometimes insert swaps to deal with the difference between
Little-Endian and Big-Endian. The swap removal pass is supposed to clean up
these swaps. On power 9 we don't need this pass since we do not need to insert
the swaps in the first place.

Commiting on behalf of Stefan Pintilie.
Differential Revision: https://reviews.llvm.org/D34627

Details

Committed
sfertileJul 5 2017, 11:37 AM
Differential Revision
D34627: [Power9] Disable removing extra swaps on P9 since it should not be needed.
Parents
rL307184: {DAGCombiner] Fold (rot x, 0) -> x
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