[SYCL] Implement SYCL 2020 spec functionality: no propagation from function to the caller

[smanna12]

In SYCL 1.2.1 spec, the attributes get propagated from device functions to a kernel.
The SYCL 2020 requirement mandating the avoidance of the propagation of all kernel attributes to the caller when used on a function.

Attributes that should not be propagated from device functions to a kernel to match with new SYCL 2020 spec.
1. scheduler_target_fmax_mhz
2. kernel_args_restrict
3. no_global_work_offset
4. max-work-group-size
5. max-global-work-dim
6. num-simd-work-items
7. reqd-sub-group-size
8. reqd-work-group-size
9. named_sub_group_size
10. sycl_explicit_simd

This patch
i. keeps the SYCL 1.2.1 spec functionality and propagates the attributes with the older SYCL mode(-sycl-std=2017)
iii. adds or updates tests to validate the propagating behavior with SYCL 1.2.1 and SYCL 2020 specs.

Signed-off-by: Soumi Manna [email protected]

[smanna12]

Runtime test failures for Basic/parallel_for_range.cpp has been tracked here: intel/llvm-test-suite#353
TableGen support (will be added in a separate patch) has been tracked here: #4094

[elizabethandrews]

I'm a little confused. What is the difference between this PR and #3836?

[smanna12]

I'm a little confused. What is the difference between this PR and #3836?

No changes in doc. This PR is different with #3836 with couple of things:

1. All Sema/Codegen tests are updated separately in SYCL 2017 and SYCL 2020 modes so that changes can actually be tested by calling FileCheck in the RUN lines.
2. This PR only copies the attributes below in SYCL 2017 (always propagate to match with SYCL 1.2.1 spec functionality) and SYCL 2020 (propagate when DirectlyCalled is called to match with SYCL 2020 spec functionality).

                 IntelReqdSubGroupSizeAttr, IntelNamedSubGroupSizeAttr,
                 ReqdWorkGroupSizeAttr, SYCLIntelKernelArgsRestrictAttr,
                 SYCLIntelNumSimdWorkItemsAttr,
                 SYCLIntelSchedulerTargetFmaxMhzAttr,
                 SYCLIntelMaxWorkGroupSizeAttr, SYCLIntelMaxGlobalWorkDimAttr,
                 SYCLIntelNoGlobalWorkOffsetAttr, SYCLSimdAttr

Rest of the attributes (no change for them to avoid duplicating them) applied to kernel if DirectlyCalled is TRUE irrespective of SYCL version.

I had rebase problems with my branch with #3836 , so created new one.

[smanna12]

Pre-commit test failures for Basic/parallel_for_range.cpp have been fixed now: intel/llvm-test-suite#353.

[AaronBallman]

LGTM!

[smanna12]

Thanks @AaronBallman for the reviews.

[elizabethandrews]

I haven't fully looked through the tests yet, but I had a couple of initial comments

[elizabethandrews]

LGTM. Thank you!

[smanna12]

Thanks for the reviews everyone.