2019 11 11 meeting notes

Agenda

• Opens
  • Anything interesting to discuss in issues or pull requests? E.g. xargs-like tool to help the driver?
• SYCL device code outlining patch updates (https://reviews.llvm.org/D60455)
• Compiler option to control SYCL extensions (https://github.com/intel/llvm/issues/806)
• "October" release https://github.com/intel/llvm/releases/tag/2019-10. Notes: https://github.com/intel/llvm/pull/805

Meeting notes

Participants: Alexey Bader (Intel), Mariya Podchshchaeva (Intel), Hal Finkel (ANL), Victor Lomuller (Codeplay), Andrew Gozillon

Opens

No.

SYCL device code outlining patch updates

• There is a problem with applying attributes to a FunctionTemplate. TableGen do not support FunctionTemplate Subject.
• Hal confirmed that attributes can't be applied to FunctionTemplates. Add TODO.
• You might need this attribute to be applied to the function or try Hal's patch from https://github.com/hfinkel/llvm-project-cxxjit/blob/cxxjit/clang/include/clang/Basic/Attr.td.

Compiler option to control SYCL extensions

• All agree that we should have flags to turn on/off particular extensions.
• Flags controlling the same extensions might be set multiple multiple time in the same clang invocation - last one overrides previous flags.
• Hal: -fsycl-<extension> (e.g. -fsycl-usm) seems reasonable.
• Use __has_extension to detect if extension is supported in the source code.
• Hal general I'm okay to enable some extensions by default.
• Compatibility: Hal, for GCC compatibility we have different names - C++99 + GNU99.
• The same way we might have driver options compatibility with compute++ driver.
• Should be aligned with the clang convention to avoid user's hassle with two sets of flags.

"October" release

A lot of new features and improvements. You can find the full list here: https://github.com/intel/llvm/pull/805.