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[PowerPC][AIX]Do not emit xxspltd mnemonic on AIX.

Authored by sfertile on Jan 15 2021, 1:36 PM.

Description

[PowerPC][AIX]Do not emit xxspltd mnemonic on AIX.

A bug in the system assembler can assemble the xxspltd extended
menemonic into the wrong instruction (extracting the wrong element).
Emit the full xxpermdi with all operands to work around the problem.

Differential Revision: https://reviews.llvm.org/D94419

Details

Committed
sfertileJan 18 2021, 6:25 AM
Differential Revision
D94419: [PowerPC][AIX]Do not emit xxspltd mnemonic on AIX.
Parents
rGe6d758de82b6: [InferAttrs] Mark some library functions as willreturn.
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