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Adds code to PPC ISEL lowering to recognize byte inserts from vector_shuffles…

Description

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

Differential Revision: https://reviews.llvm.org/D34497

Details

Committed
gyiuNov 6 2017, 12:18 PM
Differential Revision
D34497: [Power9] Exploit vinsertb instruction
Parents
rL317502: Include already promoted counts when computing SUM for VP.
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