Support for Builtins replacing integration header functionality #50
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
…ctions. A SYCL kernel entry point function is a non-member function or a static member function declared with the `sycl_kernel_entry_point` attribute. Such functions define a pattern for an offload kernel to be generated to enable execution of a SYCL kernel on a device. A SYCL library implementation orchestrates the invocation of these functions with corresponding SYCL kernel arguments in response to calls to SYCL kernel invocation functions specified by the SYCL 2020 specification. SYCL kernel entry point functions are represented in the AST as functions with a body consisting of a `SYCLKernelCallStmt` and its associated `OutlinedFunctionDecl` instance. The `OutlinedFunctionDecl` instance specifies the parameters and body to be used for the generated offload kernel. The offload kernel is sometimes referred to as a SYCL kernel caller function. A distinct offload kernel is generated for each SYCL kernel entry point function defined as a non-inline function or ODR-used in the translation unit. These offload kernels are given names equivalent to a specialization of a function template named '__sycl_kernel_caller' with a void return type, no function parameters, and a single type template argument corresponding to the type used as the SYCL kernel name as passed as an argument to the `sycl_kernel_entry_point` attribute. These offload kernels are only emitted when compiling for a SYCL device target; when compiling for a SYCL host target, SYCL kernel entry point functions are emitted as normal functions. Eventually, only those functions that are referenced from an offload kernel (or declared as SYCL_EXTERNAL) will be emitted when compiling for a device target. That pruning will be implemented in a future change.
This PR adds preliminary support for builtins replacing Integration Header functionality.
Prior support for builtins depends on KernelInfo being available at the time of builtin call. This is not always the case. If a builtin is called prior to kernel invocation, KernelInfo is not populated and the builtin will be unable to retrieve the information it requires. In this case,a global variable is declared to hold the required information, which is populated later when kernel invocation is processed. This PR implements support for this case for builtin-sycl-kernel-name.
tahonermann
changed the base branch from
sycl-upstream-fe-pr4
to
sycl-upstream-fe-pr9
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This PR contains 3 commits: