Carl Ritson 7d4baf25aa [AMDGPU] Add maximum NSA size limit ISA feature ...

Add maximum NSA size limit as an ISA feature.
Use this to reduce NSA usage on GFX10.1 to avoid stability issues
with 4 and 5 dwords NSA instructions.
Maintain use of longer NSA instructions on GFX10.3.

Note: this also contains some minor fixes for GlobalISel which
did not work correctly with non-NSA form instructions on GFX10.

Reviewed By: foad

Differential Revision: https://reviews.llvm.org/D103348

2021-07-23 16:16:06 +09:00

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