[clang][SYCL] Skip allocation diagnostic in unevaluated contexts

[schittir]

This patch adds a check to avoid emitting "SYCL kernel cannot allocate storage" diagnostic in unevaluated contexts, such as for operator new expressions in C++20 concepts and requires clauses.

This fixes false positive errors with GCC 13's standard library which uses concepts with ::new expressions.

[schittir]

@intel/dpcpp-cfe-reviewers Could you please review this? Thank you!

[schittir]

I see that buildbot shows a precommit failure but I am unable to view the exact test that fails! Are any @intel/dpcpp-cfe-reviewers able to see it?

[elizabethandrews]

I see that buildbot shows a precommit failure but I am unable to view the exact test that fails! Are any @intel/dpcpp-cfe-reviewers able to see it?

I see this -
Failed Tests (24):
SYCL :: Graph/Explicit/buffer_copy_offsets.cpp
SYCL :: Graph/Explicit/buffer_interleave_eager.cpp
SYCL :: Graph/Explicit/empty_node.cpp
SYCL :: Graph/Explicit/host_task.cpp
SYCL :: Graph/Explicit/host_task_last.cpp
SYCL :: Graph/Explicit/host_task_multiple_roots.cpp
SYCL :: Graph/Explicit/spec_constants_handler_api.cpp
SYCL :: Graph/Explicit/spec_constants_kernel_bundle_api.cpp
SYCL :: Graph/RecordReplay/basic_usm_shared.cpp
SYCL :: Graph/RecordReplay/kernel_bundle_spirv.cpp
SYCL :: Graph/RecordReplay/opencl_local_acc.cpp
SYCL :: Graph/RecordReplay/work_group_scratch_memory.cpp
SYCL :: Graph/Update/RecordReplay/whole_update_raw_arg.cpp
SYCL :: Graph/Update/update_with_raw_kernel_arg.cpp
SYCL :: InorderQueue/in_order_ext_oneapi_submit_barrier.cpp
SYCL :: KernelAndProgram/trace_kernel_program_cache.cpp
SYCL :: KernelCompiler/opencl_capabilities.cpp
SYCL :: Matrix/SG32/element_wise_all_sizes.cpp
SYCL :: Matrix/joint_matrix_half_accumulator.cpp
SYCL :: Matrix/joint_matrix_out_bounds_colmajor.cpp
SYCL :: SubGroup/vote.cpp
SYCL :: WorkGroupMemory/basic_usage.cpp
SYCL :: bindless_images/read_sampled.cpp
SYCL :: bindless_images/vulkan_interop/vulkan_sycl_image_interop_read_1d.cpp

[schittir]

The failing tests are unrelated to my changes.

[schittir]

llvm> llvm-lit -v clang/test/Preprocessor/init.c
-- Testing: 1 tests, 1 workers --
PASS: Clang :: Preprocessor/init.c (1 of 1)

Testing Time: 1.95s

Total Discovered Tests: 1
Passed: 1 (100.00%)

[schittir]

@elizabethandrews @premanandrao Thank you for your review! Do you have any other comments?