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

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

No.

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.

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.

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