Resolver: Parallelize the import resolution loop - #158845

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LorrensP-2158466 wants to merge 7 commits into

rust-lang:mainfrom

LorrensP-2158466:parallel-import-resolution

Commits on Jul 25, 2026

`CmRefCell` now only tracks borrows when not in speculative resolution. When in speculative resolution, only shared borrows are allowed.
LorrensP-2158466
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Commits on Jul 27, 2026

use `CmRefCell` for `module.unexpanded_invocations` and better/more (safety) comments for `ref_mut` structures
LorrensP-2158466
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use refcell instead of manually implementing the same logic
LorrensP-2158466
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