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Improve MIR modification - #137203
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Instead of `expand_statements`. This makes the code shorter and consistent with other MIR transform passes. The tests require updating because there is a slight change in MIR output: - the old code replaced the original statement with twelve new statements. - the new code inserts converts the original statement to a `nop` and then insert twelve new statements in front of it. I.e. we now end up with an extra `nop`, which doesn't matter at all.
It's currently lacking comments. This commit adds some, which is useful because there are some methods with non-obvious behaviour. The commit also renames two things: - `patch_map` becomes `term_patch_map`, because it's only about terminators. - `is_patched` becomes `is_term_patched`, for the same reason. (I would guess that originally `MirPatch` only handled terminators, and then over time it expanded to allow other modifications, but these names weren't updated.)
The previous commit removed its single use. `MirPatch` is a more flexible alternative.
It has a single call site, and the code is clearer this way.
It has a single call site, and doesn't seem worth having as an API function.
rustbot
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Feb 18, 2025
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Some changes occurred to MIR optimizations cc @rust-lang/wg-mir-opt |
compiler-errors
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Feb 18, 2025
compiler-errors
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Feb 18, 2025
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r? compiler-errors @bors r+ rollup |
bors
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Feb 18, 2025
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Feb 18, 2025
…iaskrgr Rollup of 10 pull requests Successful merges: - rust-lang#135711 (Do not ICE on default_field_value const with lifetimes) - rust-lang#136599 (librustdoc: more usages of `Joined::joined`) - rust-lang#136876 (Locking documentation updates) - rust-lang#137000 (Deeply normalize item bounds in new solver) - rust-lang#137126 (fix docs for inherent str constructors) - rust-lang#137161 (Pattern Migration 2024: fix incorrect messages/suggestions when errors arise in macro expansions) - rust-lang#137191 (Update mdbook and move error_index_generator) - rust-lang#137203 (Improve MIR modification) - rust-lang#137206 (Make E0599 a structured error) - rust-lang#137218 (misc `layout_of` cleanup) r? `@ghost` `@rustbot` modify labels: rollup
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Feb 19, 2025
Rollup merge of rust-lang#137203 - nnethercote:improve-MIR-modification, r=compiler-errors Improve MIR modification A few commits that simplify code that manipulates MIR bodies. r? `@tmiasko`
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…iaskrgr Rollup of 10 pull requests Successful merges: - rust-lang#135711 (Do not ICE on default_field_value const with lifetimes) - rust-lang#136599 (librustdoc: more usages of `Joined::joined`) - rust-lang#136876 (Locking documentation updates) - rust-lang#137000 (Deeply normalize item bounds in new solver) - rust-lang#137126 (fix docs for inherent str constructors) - rust-lang#137161 (Pattern Migration 2024: fix incorrect messages/suggestions when errors arise in macro expansions) - rust-lang#137191 (Update mdbook and move error_index_generator) - rust-lang#137203 (Improve MIR modification) - rust-lang#137206 (Make E0599 a structured error) - rust-lang#137218 (misc `layout_of` cleanup) r? `@ghost` `@rustbot` modify labels: rollup
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…iaskrgr Rollup of 10 pull requests Successful merges: - rust-lang#135711 (Do not ICE on default_field_value const with lifetimes) - rust-lang#136599 (librustdoc: more usages of `Joined::joined`) - rust-lang#136876 (Locking documentation updates) - rust-lang#137000 (Deeply normalize item bounds in new solver) - rust-lang#137126 (fix docs for inherent str constructors) - rust-lang#137161 (Pattern Migration 2024: fix incorrect messages/suggestions when errors arise in macro expansions) - rust-lang#137191 (Update mdbook and move error_index_generator) - rust-lang#137203 (Improve MIR modification) - rust-lang#137206 (Make E0599 a structured error) - rust-lang#137218 (misc `layout_of` cleanup) r? `@ghost` `@rustbot` modify labels: rollup
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A few commits that simplify code that manipulates MIR bodies.
r? @tmiasko