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Adds code to PPC ISEL lowering to recognize half-word inserts from…

Description

Adds code to PPC ISEL lowering to recognize half-word inserts from vector_shuffles, and use P9 shift and vector insert instructions instead of vperm.

Differential Revision: https://reviews.llvm.org/D34160

Details

Committed
gyiuNov 1 2017, 11:06 AM
Differential Revision
D34160: [Power9] Exploit vinserth instruction
Parents
rL317110: Revert r317105 to investigate bot breakage.
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