Rollup of 4 pull requests #99054
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Rollup of 4 pull requests #99054
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This is useful for debugging drop-tracking; previously, you had to recompile
rustc from source and manually add a call to `write_graph_to_file`. This
makes the option more discoverable and configurable at runtime.
I also took the liberty of making the labels for the CFG nodes much easier to read:
previously, they looked like `id(2), local_id: 48`, now they look like
```
expr from_config (hir_id=HirId { owner: DefId(0:10 ~ default_struct_update[79f9]::foo), local_id: 2})
```
Because the `infcx` isn't needed. This removes one lifetime from `Search`.
Currently, `search_for_structural_match_violation` constructs an `infcx` from a `tcx` and then only uses the `tcx` within the `infcx`. This is wasteful because `infcx` is a big type. This commit changes it to use the `tcx` directly. When compiling `pest-2.1.3`, this changes the memcpy stats reported by DHAT for a `check full` build from this: ``` 433,008,916 bytes (100%, 99,787.93/Minstr) in 2,148,668 blocks (100%, 495.17/Minstr), avg size 201.52 bytes ``` to this: ``` 101,422,347 bytes (99.98%, 25,243.59/Minstr) in 1,318,407 blocks (99.96%, 328.15/Minstr), avg size 76.93 bytes ``` This translates to a 4.3% reduction in instruction counts.
Some of these are a little questionable because the output is so much longer, but I would really love to keep the bit that adds the pretty-printed expression to the generated CFG .dot file.
Before:
```
DEBUG rustc_typeck::check::generator_interior::drop_ranges::record_consumed_borrow consume PlaceWithHirId { hir_id: HirId { owner: DefId(0:7 ~ default_struct_update[79f9]::foo), local_id: 15 }, place: Place { base_ty: impl std::future::Future<Output = ()>, base: Rvalue, projections: [] } }; diag_expr_id=HirId { owner: DefId(0:7 ~ default_struct_update[79f9]::foo), local_id: 15 }, using parent expr HirId { owner: DefId(0:7 ~ default_struct_update[79f9]::foo), local_id: 49 }
```
After:
```
DEBUG rustc_typeck::check::generator_interior::drop_ranges::record_consumed_borrow consume PlaceWithHirId { hir_id: HirId { owner: DefId(0:7 ~ default_struct_update[79f9]::foo), local_id: 15 }, place: Place { base_ty: impl std::future::Future<Output = ()>, base: Rvalue, projections: [] } }; diag_expr_id=expr from_config(Config {
nickname: None,
..Default::default()
}) (hir_id=HirId { owner: DefId(0:7 ~ default_struct_update[79f9]::foo), local_id: 15 }), using parent expr
.await (hir_id=HirId { owner: DefId(0:7 ~ default_struct_update[79f9]::foo), local_id: 49 })
```
…holk
Add a `-Zdump-drop-tracking-cfg` debugging flag
This is useful for debugging drop-tracking; previously, you had to recompile
rustc from source and manually add a call to `write_graph_to_file`. This
makes the option more discoverable and configurable at runtime.
I also took the liberty of making the labels for the CFG nodes much easier to read:
previously, they looked like `id(2), local_id: 48`, now they look like
```
expr from_config (hir_id=HirId { owner: DefId(0:10 ~ default_struct_update[79f9]::foo), local_id: 2})
```
r? ``@eholk``
An optimization for `pest-2.1.3` An easy win I found while looking at a profile of `pest-2.1.3`. It's also a small code cleanup. r? `@pnkfelix`
…ssion-diagnostic-1, r=davidtwco Migrate some diagnostics from `rustc_const_eval` to `SessionDiagnostic` I'm still trying to get the hang of this, so it doesn't migrate _all_ of `rustc_const_eval`. Working on that later. r? `@davidtwco`
…nv, r=michaelwoerister Highlight conflicting param-env candidates This could probably be further improved by noting _why_ equivalent param-env candidates (modulo regions) leads to ambiguity. Fixes rust-lang#98786
rustbot
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@bors r+ rollup=never p=5 |
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☀️ Test successful - checks-actions |
This was referenced Jul 8, 2022
|
Finished benchmarking commit (45263fc): comparison url. Instruction count
Max RSS (memory usage)Results
CyclesResults
If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf. Next Steps: If you can justify the regressions found in this perf run, please indicate this with @rustbot label: +perf-regression Footnotes |
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Successful merges:
-Zdump-drop-tracking-cfgdebugging flag #98533 (Add a-Zdump-drop-tracking-cfgdebugging flag)pest-2.1.3#98654 (An optimization forpest-2.1.3)rustc_const_evaltoSessionDiagnostic#98657 (Migrate some diagnostics fromrustc_const_evaltoSessionDiagnostic)Failed merges:
r? @ghost
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