[all-commits] [llvm/llvm-project] 8da3a8: [NVPTX] fixup support for over-aligned parameters ...

[Alex MacLean via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8da3a8f550d0b266411b2dc177dff8591ee86cb2
      https://github.com/llvm/llvm-project/commit/8da3a8f550d0b266411b2dc177dff8591ee86cb2
  Author: Alex MacLean <amaclean at nvidia.com>
  Date:   2024-05-17 (Fri, 17 May 2024)

  Changed paths:
    M llvm/lib/Target/NVPTX/NVPTXAsmPrinter.cpp
    M llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp
    M llvm/lib/Target/NVPTX/NVPTXISelLowering.h
    M llvm/lib/Target/NVPTX/NVPTXUtilities.cpp
    M llvm/lib/Target/NVPTX/NVPTXUtilities.h
    A llvm/test/CodeGen/NVPTX/param-overalign.ll

  Log Message:
  -----------
  [NVPTX] fixup support for over-aligned parameters (#92457)

This extends the NVPTX support for over-aligned parameters and return
values in a few related ways:

- Support for `alignstack` attribute, as an alternative to legacy nvvm
`!"align"` metadata entries. While we still maintain the legacy support,
long term it might be nice to auto-upgrade to `alignstack`.
- Check the alignment info when emitting the parameter list to prevent a
mismatch between alignment of caller and callee, which would previously
cause a fatal error for `ptxas`.
- Check the alignment info when emitting loads for parameters,
potentially enabling better vectorization.



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