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Author SHA1 Message Date
Stanislav Mekhanoshin c85eda74b8 [AMDGPU] fix copies between 32 and 16 bit
This a hack to fix illegal 32 to 16 bit copies.
The problem is when we make 16 bit subregs legal it creates
a huge amount of failures which can only be resolved at once
without a temporary hack like this.

The next step is to change operands, instruction definitions
and patterns until this hack is not needed.

Differential Revision: https://reviews.llvm.org/D79119
2020-05-04 08:54:22 -07:00