[PATCH] D57027: [AMDGPU] Factored PAL metadata handling out into its own class

[Tim Renouf via Phabricator via llvm-commits]

tpr created this revision.
Herald added subscribers: llvm-commits, kristina, rupprecht, t-tye, dstuttard, yaxunl, mgorny, nhaehnle, wdng, jvesely, kzhuravl, arsenm.
tpr added reviewers: scott.linder, kzhuravl.

This commit introduces a new AMDGPUPALMetadata class that:

- is inside the AMDGPU target;
- keeps an in-memory representation of PAL metadata;
- provides a method for use by LLPC to write metadata into LLVM IR;
- provides a method to read the frontend-supplied metadata from LLVM IR;
- provides methods for the asm printer to set metadata items;
- provides methods to write the metadata as a binary blob to put in a .note record or as an asm directive;
- provides a method to read the metadata as a binary blob from a .note record.

Because llvm-readobj cannot call directly into a target, I had to remove
llvm-readobj's ability to dump PAL metadata, pending a resolution to
https://reviews.llvm.org/D52821

Change-Id: I756dc830894fcb6850324cdcfa87c0120eb2cf64


Repository:
  rL LLVM

https://reviews.llvm.org/D57027

Files:
  include/llvm/Support/AMDGPUMetadata.h
  lib/Support/AMDGPUMetadata.cpp
  lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
  lib/Target/AMDGPU/AMDGPUAsmPrinter.h
  lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
  lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp
  lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.h
  lib/Target/AMDGPU/Utils/AMDGPUPALMetadata.cpp
  lib/Target/AMDGPU/Utils/AMDGPUPALMetadata.h
  lib/Target/AMDGPU/Utils/CMakeLists.txt
  test/CodeGen/AMDGPU/elf-notes.ll
  tools/llvm-readobj/ELFDumper.cpp

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