Sycl jit toolchain versions - #23018
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Scripts + docs for embedding multiple SYCL versions in one libsycl-jit.so: - snapshot-version.sh: import a released toolchain (headers + libdevice sources + regenerated generated-headers + unified-runtime) into a frozen sycl-toolchains/sycl-v-<label>/ snapshot. - build-version-libdevice.sh: build a version's device libraries from its own sources with the new clang. - README.md documents the layout, the latest-is-live model, the import-once/ own-git-history workflow, and the promotion/drop policy. - .gitattributes marks the vendored snapshots linguist-vendored. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Pristine frozen snapshots of the oneAPI DPC++ v6.2.2 and v6.3.0 releases (headers, unified-runtime, regenerated version/feature_test/device_aspect headers, and libdevice sources), imported via snapshot-version.sh. VERSION records the origin tag + commit SHA for each. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…hots New-clang compatibility fix. clang removed 'buffer_location' from the sycl_type attribute's SYCLType enum (FPGA kernel_arg_buffer_location metadata removal, intel#22499), so the old headers' __SYCL_TYPE(buffer_location) is rejected during RTC device compilation. The annotation is a no-op under the new compiler, so dropping it is semantically safe. First tracked divergence of these snapshots from their upstream import. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Behind new CMake option SYCL_JIT_EMBED_LEGACY_TOOLCHAINS (OFF by default, so the default build is byte-identical): - CMakeLists.txt: stage the live tree under latest/ and each sycl-v-*/ snapshot under its own subtree (vendored headers + shared new-compiler resource/OpenCL headers + per-version device libraries built by build-version-libdevice.sh). generate.py then embeds every subtree from the one install dir. - DeviceCompilation.cpp (guarded by JIT_MULTIVERSION_TOOLCHAIN): make the toolchain prefix version-aware (thread-local active version; default latest, overridable via JIT_RTC_TOOLCHAIN_VERSION / setActiveToolchainVersion), so clang++, resource headers, sycl headers and libdevice all resolve within the selected version's subtree. Also add include/unified-runtime to the search path so both <ur_api.h> and <unified-runtime/ur_api.h> spellings resolve. A single libsycl-jit.so can then RTC-compile against multiple SYCL versions, selected at runtime. Validated on PVC: latest and v6.2.2/v6.3.0 each compile and run against their own headers + libdevice. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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@vmustya multi version SYCL JIT headers. How it works:
In this PR I pick 2 released versions as "copies" just to test things out. |
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