[all-commits] [llvm/llvm-project] f4381d: [NVPTX] Add initial support for '.alias' in PTX

[Joseph Huber via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f4381d46445709fda9b8ec6c8f85d019de2dad22
      https://github.com/llvm/llvm-project/commit/f4381d46445709fda9b8ec6c8f85d019de2dad22
  Author: Joseph Huber <jhuber6 at vols.utk.edu>
  Date:   2023-07-21 (Fri, 21 Jul 2023)

  Changed paths:
    M llvm/lib/Target/NVPTX/NVPTXAsmPrinter.cpp
    M llvm/lib/Target/NVPTX/NVPTXAsmPrinter.h
    A llvm/test/CodeGen/NVPTX/alias-errors.ll
    M llvm/test/CodeGen/NVPTX/alias.ll

  Log Message:
  -----------
  [NVPTX] Add initial support for '.alias' in PTX

This patch adds initial support for using aliases when targeting PTX. We
perform a pretty strict conversion from the globals referenced to the
expected output. as described in the PTX documentation at
https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#kernel-and-function-directives-alias

These cannot currently be used due to a bug in the `nvlink`
implementation that causes aliases to pruned functions to crash the
linker.

Reviewed By: tra

Differential Revision: https://reviews.llvm.org/D155211