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Add [TRACKED_NO_CRATE_HASH] and [SUBSTRUCT] directives

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This is necessary for options that should invalidate the incremental
hash but *not* affect the crate hash (e.g. --remap-path-prefix).

This doesn't add `for_crate_hash` to the trait directly because it's not
relevant for *types*, only for *options*, which are fields on a larger
struct. Instead, it adds a new `SUBSTRUCT` directive for options, which
does take a `for_crate_hash` parameter.

- Use TRACKED_NO_CRATE_HASH for --remap-path-prefix
- Add test that `remap_path_prefix` is tracked
- Reduce duplication in the test suite to avoid future churn
This commit is contained in:
Joshua Nelson 2021-04-15 19:25:01 -04:00
parent fb7018b41e
commit 272015190d
6 changed files with 133 additions and 90 deletions
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compiler/rustc_session/src/config.rs
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@ -2374,6 +2374,7 @@ crate mod dep_tracking {
impl_dep_tracking_hash_for_sortable_vec_of!(String);
impl_dep_tracking_hash_for_sortable_vec_of!(PathBuf);
impl_dep_tracking_hash_for_sortable_vec_of!((PathBuf, PathBuf));
impl_dep_tracking_hash_for_sortable_vec_of!(CrateType);
impl_dep_tracking_hash_for_sortable_vec_of!((String, lint::Level));
impl_dep_tracking_hash_for_sortable_vec_of!((String, Option<String>, NativeLibKind));