cg_gcc subtree sync #149348
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cg_gcc subtree sync #149348
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…update_cg_gcc_2025-11-04
Improve type safety by using an enum rather than strings.
…ature This way warnings are emitted even in a check build.
Previously it was rather inconsistent which crates got the rust logo and which didn't and setting html_root_url was forgotten in many cases.
Replace `allow` attributes with `expect` and remove unused attributes
…ements, r=WaffleLapkin Move warning reporting from flag_to_backend_features to cfg_target_feature This way warnings are emitted even in a check build.
…iaskrgr Rollup of 8 pull requests Successful merges: - rust-lang#147994 (Deduplicate deprecation warning when using unit or tuple structs) - rust-lang#148440 ([rustdoc search] Simplify itemTypes and filter "dependencies") - rust-lang#148501 (triagebot: Create Zulip topics for libs backports) - rust-lang#148517 (Remove no longer necessary lint allow) - rust-lang#148518 (Unify the configuration of the compiler docs) - rust-lang#148523 (miri subtree update) - rust-lang#148525 (Fix ICE from lit_to_mir_constant caused by type error) - rust-lang#148534 (Merge `Vec::push{,_mut}_within_capacity`) r? `@ghost` `@rustbot` modify labels: rollup
This implements a new unstable compiler flag `-Zannotate-moves` that makes
move and copy operations visible in profilers by creating synthetic debug
information. This is achieved with zero runtime cost by manipulating debug
info scopes to make moves/copies appear as calls to `compiler_move<T, SIZE>`
and `compiler_copy<T, SIZE>` marker functions in profiling tools.
This allows developers to identify expensive move/copy operations in their
code using standard profiling tools, without requiring specialized tooling
or runtime instrumentation.
The implementation works at codegen time. When processing MIR operands
(`Operand::Move` and `Operand::Copy`), the codegen creates an `OperandRef`
with an optional `move_annotation` field containing an `Instance` of the
appropriate profiling marker function. When storing the operand,
`store_with_annotation()` wraps the store operation in a synthetic debug
scope that makes it appear inlined from the marker.
Two marker functions (`compiler_move` and `compiler_copy`) are defined
in `library/core/src/profiling.rs`. These are never actually called -
they exist solely as debug info anchors.
Operations are only annotated if the type:
- Meets the size threshold (default: 65 bytes, configurable via
`-Zannotate-moves=SIZE`)
- Has a non-scalar backend representation (scalars use registers,
not memcpy)
This has a very small size impact on object file size. With the default
limit it's well under 0.1%, and even with a very small limit of 8 bytes
it's still ~1.5%. This could be enabled by default.
…_2025-11-04, r=GuillaumeGomez Sync rustc_codegen_gcc subtree cc `@antoyo` r? ghost
…1_13 Sync from rust 2025/11/13
Clarify -Cllvm-args forwarding to GCC in Readme
…1_24 Update to nightly-2025-11-24
Dlopen libgccjit.so in order to support multiple targets more easily
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Update gccjit dependency
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This will be useful for the unification work of the handling of the library between all Rust setups.
…root Move libgccjit.so in the sysroot
…update_cg_gcc_2025-11-26
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This PR changes how GCC is built. Consider updating src/bootstrap/download-ci-gcc-stamp. |
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@bors r+ p=1 rollup=never |
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cc @antoyo