ergawy 3847a6ae75 [MLIR][SPIRV] Support two memory access attributes in OpCopyMemory.
This commit augments spv.CopyMemory's implementation to support 2 memory
access operands. Hence, more closely following the spec. The following
changes are introduces:

- Customize logic for spv.CopyMemory serialization and deserialization.
- Add 2 additional attributes for source memory access operand.

Reviewed By: antiagainst

Differential Revision: https://reviews.llvm.org/D83241
2020-07-09 20:23:35 -04:00
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