[PATCH] D70038: [AMDGPU] add support for hostcall buffer pointer as hidden kernel argument

[Sameer Sahasrabuddhe via Phabricator via llvm-commits]

sameerds created this revision.
Herald added subscribers: llvm-commits, hiraditya, t-tye, tpr, dstuttard, yaxunl, nhaehnle, wdng, jvesely, kzhuravl, arsenm.
Herald added a project: LLVM.

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.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D70038

Files:
  llvm/docs/AMDGPUUsage.rst
  llvm/include/llvm/Support/AMDGPUMetadata.h
  llvm/lib/BinaryFormat/AMDGPUMetadataVerifier.cpp
  llvm/lib/Support/AMDGPUMetadata.cpp
  llvm/lib/Target/AMDGPU/AMDGPUHSAMetadataStreamer.cpp
  llvm/test/CodeGen/AMDGPU/hsa-metadata-from-llvm-ir-full-v3.ll
  llvm/test/CodeGen/AMDGPU/hsa-metadata-from-llvm-ir-full.ll
  llvm/test/CodeGen/AMDGPU/hsa-metadata-hostcall-absent-v3.ll
  llvm/test/CodeGen/AMDGPU/hsa-metadata-hostcall-absent.ll
  llvm/test/CodeGen/AMDGPU/hsa-metadata-hostcall-present-v3.ll
  llvm/test/CodeGen/AMDGPU/hsa-metadata-hostcall-present.ll

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