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[Hexagon] Allow use of gather intrinsics even with no-packets

Description

[Hexagon] Allow use of gather intrinsics even with no-packets

Vgather requires must be in a packet with a store, which contradicts
the no-packets feature. As a consequence, gather/scatter could not be
used with no-packets. Relax this, and allow gather packets as exceptions
to the no-packets requirements.

Details

Committed
kparzyszAug 7 2018, 1:33 PM
Parents
rL339176: [InstSimplify] fold fsub+fadd with common operand
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