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With `lto = "fat"` or `lto = "thin"`, the build of a binary that uses a library with kernels stopped with an error: "failed to get bitcode from object file for LTO (Can't find section .llvmbc)". rustc keeps a list of the Rust objects in each rlib. This list contains the objects of all modules. With LTO, rustc reads bitcode from these objects and removes them from the link. The artifact objects have no bitcode. If a session writes an rlib, the backend now gives each artifact object to rustc as the DWARF object of its module. This object is in the rlib, but it is not in the list. LTO does not read this object, and the linker gets it from the rlib. The system linker does not get the DWARF objects. If the session also writes a binary or a dynamic library, the backend gives the artifact objects to this linker as link arguments. With `-Zlink-native-libraries=no`, rustc does not give link arguments to the linker. Then the artifact objects of this session are Rust objects, as before. The book said that `join_codegen()` and `link()` only call the LLVM backend. Now it tells what they add to the outputs. CI builds `cuda_module_in_lib` with fat LTO. The library is an rlib, and then an rlib and a cdylib. After each build, CI makes sure that the binary has the PTX bundles of the library and of the binary. It also makes sure that the cdylib has the PTX bundle of the library. Fixes NVIDIA#1495 Signed-off-by: Mikhail Borisov <mikhail.boriso2014@gmail.com> Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Use Cargo target names for standalone emit-ltoir artifacts. Bind the compiler and reader to the same intermediate directory when invoked from a Cargo workspace member. Signed-off-by: Trent Nelson <trent@trent.me>
Accept ordered external LTO files when materializing embedded cubins. Include their content in the codegen fingerprint and verify owned bytes before linking through the existing finalizer. Preserve inputs that overlap generated output paths and diagnose unresolved device symbols. Add a standalone CUDA FFI example and a native regression script. Signed-off-by: Trent Nelson <trent@trent.me>
Reuse existing example dependency pins and classify external LTO as an FFI fixture. Run its linking regression in native sweeps and verify relocatable debug output in the existing full-debug route. Signed-off-by: Trent Nelson <trent@trent.me>
Preserve exact geometry and fixed dynamic shared-memory requirements through artifact loading so preparation can select and validate the compiled allocation. Keep artifact writers and readers on one in-tree implementation while preserving legacy bundles without launch facts. Signed-off-by: Trent Nelson <trent@trent.me>
Combine the reviewed compiler prerequisites for native library calls. Keep the external LTO fixture on the shared in-tree artifact implementation. Signed-off-by: Trent Nelson <trent@trent.me>
Use the reviewed Cargo target and output-directory correction in the combined compiler prerequisite tree. Signed-off-by: Trent Nelson <trent@trent.me>
Resolve concrete registration functions and scalar argument types during device compilation, then invoke the native provider and link its owned LTO output through the ordinary artifact finalizer. Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Carry the convergence marker through private dependency metadata and emit it on each marked LLVM declaration before native optimization. Deduplicate repeated extern symbols while rejecting incompatible signatures and convergence requirements. Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me> # Conflicts: # cuda-oxide/crates/rustc-codegen-cuda/src/library.rs
Keep original MIR and static identities while emitting checked helper bodies for each root. Route typed calls and native plans through those bodies so shared helpers can use distinct block shapes. Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Treat each block as one cluster when a known earlier target is selected. Bind a device hint only after this fallback is used, so later feature selection cannot silently change its semantics. Keep raw intrinsic and cluster operation target requirements intact. Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Retain the rustc-free collective analysis and typed provider changes while joining the current upstream host and tooling updates. Signed-off-by: Trent Nelson <trent@trent.me>
Return summaries already receive nonreturn effects through the settled incoming states. Transfer return blocks to collect their results, and keep the complete traversal when validating source obligations. Signed-off-by: Trent Nelson <trent@trent.me>
Allocate native scratch and validate its reuse in rustc-free MIR passes. Carry authenticated descriptor facts through import, then lower the validated plan into shared views and launch requirements. Signed-off-by: Trent Nelson <trent@trent.me>
Keep the Rust bridge limited to callback identity and source facts. Validate reachable bodies in mir-transforms before provider execution, retain exported thunks, and lower the opaque environment argument late. Signed-off-by: Trent Nelson <trent@trent.me>
Carry genuine Warp metadata through the importer and validate participation and memory completion in mir-transforms. Lower group index queries after proof and preserve the physical-Warp contract. Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Preserve upstream backend selection and output ownership across the prepared-module pause while retaining native proof and late lowering. Signed-off-by: Trent Nelson <trent@trent.me>
Carry the storage ownership and planning changes onto the refreshed checked compiler pipeline. Preserve the existing borrowed-wrapper semantics and proof ordering. Signed-off-by: Trent Nelson <trent@trent.me>
Carry concrete callback identity and admission through the prepared compiler pipeline while preserving borrowed-wrapper storage semantics. Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Recognize genuine core integer methods at the import boundary and retain their scalar effects on the original direct calls. Other helper calls keep their conservative borrow handling. Signed-off-by: Trent Nelson <trent@trent.me>
Check signed and unsigned imports and preserve ordinary call effects when no direct target is selected. Clarify the source metadata comment. Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
Signed-off-by: Trent Nelson <trent@trent.me>
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Native collective calls can now use controls and memory regions that agree within each physical warp while sibling warps differ. Participation and memory-access analysis run in rustc-free prepared MIR after mem2reg. A genuine group-index query supplies uniformity facts; ordinary lane arithmetic does not. Block barriers still complete conflicting accesses.
This update integrates Rust 1.99.1 and retains the parent's callback and borrowed-wrapper rules. It owns physical-width-32 validation, native-call lowering and the provider-free group query. Logical widths and Warp scratch remain later layers; the paired Rust API is NVIDIA/cccl#12113.
Affected host tests and strict checks pass. All 64 original compiler cases pass, and both ordinary-Git profiles match the previously qualified executable sections, ABI, resources and launch facts. Complete artifacts differ; existing helper calls and stack traffic remain accounted for. The original 163-case GPU test, three sanitizer runs, expected ownership trap and health replay pass. Fresh HTTPS builds match all 17 mapped sections across both profiles; GPU tests used the ordinary-Git release binary.
Builds on #1575. Review the 15-file physical-warp change. GitHub's Files tab remains cumulative against main. Narrow existing-number stacks need maintainer-created upstream parent branches or prerequisite landing. This PR remains draft.