Use globals instead of metadata for std::autodiff #147390
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r? @nnethercote rustbot has assigned @nnethercote. Use |
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r? @jieyouxu since you already reviewed my last two test PRs I might as well directly assign you ^^ Thanks! (and please reroll if you're too busy!) |
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You can r=me once tidy is green |
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@bors r=jieyouxu rollup |
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Use globals instead of metadata for std::autodiff LLVM's Metadata is quite fragile. In debug builds we use incremental compilation, which caused the metadata to be dropped. With this change we use named globals instead of metadata to instruct Enzyme how to differentiate functions. Globals are proper llvm values and thus can't be dropped. Also added an incremental/dbg test which now passes, to unblock the EnzymeAD CI which wants to run Rust autodiff tests. r? compiler
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Rollup of 7 pull requests Successful merges: - #143900 ([rustdoc] Correctly handle `should_panic` doctest attribute and fix `--no-run` test flag on the 2024 edition) - #145608 (Prevent downstream `impl DerefMut for Pin<LocalType>`) - #146865 (kcfi: only reify trait methods when dyn-compatible) - #147390 (Use globals instead of metadata for std::autodiff) - #147398 (Fix; correct placement of type inference error for method calls) - #147431 (compiletest: Read the whole test file before parsing directives) - #147433 (Fix doc comment) r? `@ghost` `@rustbot` modify labels: rollup
Zalathar
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Use globals instead of metadata for std::autodiff LLVM's Metadata is quite fragile. In debug builds we use incremental compilation, which caused the metadata to be dropped. With this change we use named globals instead of metadata to instruct Enzyme how to differentiate functions. Globals are proper llvm values and thus can't be dropped. Also added an incremental/dbg test which now passes, to unblock the EnzymeAD CI which wants to run Rust autodiff tests. r? compiler
bors
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Oct 7, 2025
Rollup of 8 pull requests Successful merges: - #145608 (Prevent downstream `impl DerefMut for Pin<LocalType>`) - #146865 (kcfi: only reify trait methods when dyn-compatible) - #147205 (Add a new `wasm32-wasip3` target to Rust) - #147390 (Use globals instead of metadata for std::autodiff) - #147398 (Fix; correct placement of type inference error for method calls) - #147422 (collect-license-metadata: Print a diff of the expected output) - #147431 (compiletest: Read the whole test file before parsing directives) - #147433 (Fix doc comment) r? `@ghost` `@rustbot` modify labels: rollup
bors
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Oct 7, 2025
Rollup of 8 pull requests Successful merges: - #145608 (Prevent downstream `impl DerefMut for Pin<LocalType>`) - #146865 (kcfi: only reify trait methods when dyn-compatible) - #147205 (Add a new `wasm32-wasip3` target to Rust) - #147390 (Use globals instead of metadata for std::autodiff) - #147398 (Fix; correct placement of type inference error for method calls) - #147422 (collect-license-metadata: Print a diff of the expected output) - #147431 (compiletest: Read the whole test file before parsing directives) - #147433 (Fix doc comment) r? `@ghost` `@rustbot` modify labels: rollup
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LLVM's Metadata is quite fragile. In debug builds we use incremental compilation, which caused the metadata to be dropped. With this change we use named globals instead of metadata to instruct Enzyme how to differentiate functions.
Globals are proper llvm values and thus can't be dropped. Also added an incremental/dbg test which now passes, to unblock the EnzymeAD CI which wants to run Rust autodiff tests.
r? compiler