Sameer Sahasrabuddhe 52c5014da0 [AMDGPU] add support for hostcall buffer pointer as hidden kernel argument ...

Hostcall is a service that allows a kernel to submit requests to the
host using shared buffers, and block until a response is
received. This will eventually replace the shared buffer currently
used for printf, and repurposes the same hidden kernel argument. This
change introduces a new ValueKind in the HSA metadata to represent the
hostcall buffer.

Differential Revision: https://reviews.llvm.org/D70038

2019-11-20 15:53:55 +05:30

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