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Most notably, this commit changes the `pub use crate::*;` in that file
to `use crate::*;`. This requires a lot of `use` items in other crates
to be adjusted, because everything defined within `rustc_span::*` was
also available via `rustc_span::source_map::*`, which is bizarre.
The commit also removes `SourceMap::span_to_relative_line_string`, which
is unused.
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This query has a name that sounds general-purpose, but in fact it has
coverage-specific semantics, and (fortunately) is only used by coverage code.
Because it is only ever called once (from one designated CGU), it doesn't need
to be a query, and we can change it to a regular function instead.
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This became unused in #112053, when `-Zcgu-partitioning-strategy` was
removed.
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It's just a `filter_map(...).collect()`.
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It's very simple and has a single call site.
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It has not effect, because the default `visit_local` in `mir::Visitor`
is already empty.
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So that we later can improve the accuracy of diagnostics.
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And rename to check_operand_move_size(). Later we will introduce
check_fn_args_move_size().
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Don't store lazyness in `DefKind::TyAlias`
1. Don't store lazyness of a type alias in its `DefKind`, but instead via a query.
2. This allows us to treat type aliases as lazy if `#[feature(lazy_type_alias)]` *OR* if the alias contains a TAIT, rather than having checks for both in separate parts of the codebase.
r? `@oli-obk` cc `@fmease`
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rename mir::Constant -> mir::ConstOperand, mir::ConstKind -> mir::Const
Also, be more consistent with the `to/eval_bits` methods... we had some that take a type and some that take a size, and then sometimes the one that takes a type is called `bits_for_ty`.
Turns out that `ty::Const`/`mir::ConstKind` carry their type with them, so we don't need to even pass the type to those `eval_bits` functions at all.
However this is not properly consistent yet: in `ty` we have most of the methods on `ty::Const`, but in `mir` we have them on `mir::ConstKind`. And indeed those two types are the ones that correspond to each other. So `mir::ConstantKind` should actually be renamed to `mir::Const`. But what to do with `mir::Constant`? It carries around a span, that's really more like a constant operand that appears as a MIR operand... it's more suited for `syntax.rs` than `consts.rs`, but the bigger question is, which name should it get if we want to align the `mir` and `ty` types? `ConstOperand`? `ConstOp`? `Literal`? It's not a literal but it has a field called `literal` so it would at least be consistently wrong-ish...
``@oli-obk`` any ideas?
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this way we have mir::ConstValue and ty::ValTree as reasonably parallel
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consistently pass ty::Const through valtrees
Some drive-by things extracted from https://github.com/rust-lang/rust/pull/115748.
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treat host effect params as erased in codegen
This fixes the changes brought to codegen tests when effect params are added to libcore, by not attempting to monomorphize functions that get the host param by being `const fn`.
r? `@oli-obk`
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This fixes the changes brought to codegen tests when effect params are
added to libcore, by not attempting to monomorphize functions that get
the host param by being `const fn`.
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Allow `large_assignments` for Box/Arc/Rc initialization
Does the `stop linting in box/arc initialization` task of #83518.
r? `@oli-obk` who is E-mentor.
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Emit error instead of ICE when optimized MIR is missing
Closes #51388
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Does the `stop linting in box/arc initialization` task of 83518.
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Closes 51388.
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Avoid duplicate `large_assignments` lints
By checking for overlapping spans.
This PR does the "reduce noisiness" task in #83518.
r? `@oli-obk` who added E-mentor and E-help-wanted and wrote the initial code.
(The fix itself is in https://github.com/rust-lang/rust/pull/114774/commits/dc82736677a134a1b52def496db111681c053e82. The two commits before that are just small refactorings.)
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By checking for overlapping spans.
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Tweak CGU sorting in a couple of places.
In `base.rs`, tweak how the CGU size interleaving works. Since #113777, it's much more common to have multiple CGUs with identical sizes. With the existing code these same-sized items ended up in the opposite-to-desired order due to the stable sorting. The code now starts with a reverse sort (like is done in `partitioning.rs`) which gives the behaviour we want. This doesn't matter much for perf, but makes profiles in `samply` look more like what we expect.
In `partitioning.rs`, we can use `sort_by_key` instead of `sort_by_cached_key` because `CGU::size_estimate()` is cheap. (There is an identical CGU sort earlier in that function that already uses `sort_by_key`.)
r? `@pnkfelix`
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get_first
single_char_add_str
unnecessary_mut_passed
manual_map
manual_is_ascii_check
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comparison_to_empty
iter_nth_zero
for_kv_map
manual_next_back
redundant_pattern
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In `base.rs`, tweak how the CGU size interleaving works. Since #113777,
it's much more common to have multiple CGUs with identical sizes. With
the existing code these same-sized items ended up in the
opposite-to-desired order due to the stable sorting. The code now starts
with a reverse sort (like is done in `partitioning.rs`) which gives the
behaviour we want. This doesn't matter much for perf, but makes profiles
in `samply` look more like what we expect.
In `partitioning.rs`, we can use `sort_by_key` instead of
`sort_by_cached_key` because `CGU::size_estimate()` is cheap. (There is
an identical CGU sort earlier in that function that already uses
`sort_by_key`.)
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Instead of repeatedly merging the two smallest CGUs, we now use a
merging algorithm that aims to minimize the duplication of inlined
functions.
`exa-0.10.1` was one benchmark that saw particularly good results. The
old CGU stats:
```
INTERNALIZE
- unique items: 2774 (1216 root + 1558 inlined), unique size: 122065 (77219 root + 44846 inlined)
- placed items: 3834 (1216 root + 2618 inlined), placed size: 154552 (77219 root + 77333 inlined)
- placed/unique items ratio: 1.38, placed/unique size ratio: 1.27
- CGUs: 16, mean size: 9659.5, sizes: [11791, 11634, 11173, 10987, 10939, 10507, 9992, 9813, 9593, 9580, 9030, 8447, 7975, 7961, 7876, 7254]
```
The new CGU stats:
```
INTERNALIZE
- unique items: 2774 (1216 root + 1558 inlined), unique size: 122065 (77219 root + 44846 inlined)
- placed items: 3626 (1216 root + 2410 inlined), placed size: 147201 (77219 root + 69982 inlined)
- placed/unique items ratio: 1.31, placed/unique size ratio: 1.21
- CGUs: 16, mean size: 9200.1, sizes: [11634, 10939, 10227, 9555, 9178, 9167, 8879, 8804, 8604, 8603 (x3), 8602 (x2), 8601, 8600]
```
The difference is in the number of inlined items. There are 1558 unique
inlined items. With the old algorithm these were placed 2618 times,
resulting in 1060 duplicates. With the new algorithm these were placed
2410 times, resulting in 852 duplicates. Also, the mean CGU size dropped
from 9659.5 to 9200.1, and the CGU size distribution tightened, with the
biggest one a little smaller and the smallest ones a little bigger.
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It has two conditions. This commit splits it in two, one per condition.
The next commit will change the first loop.
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They're quite rare, and ignoring them simplifies things quite a bit, and
further reduces the number of calls to `MonoItem::size_estimate` to the
number of placed items (one per root item, and one or more per reachable
inlined item).
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This means we call `MonoItem::size_estimate` (which involves a query)
less often: just once per mono item, and then once more per inline item
placement. After that we can reuse the stored value as necessary. This
means `CodegenUnit::compute_size_estimate` is cheaper.
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It replaces `(Linkage, Visibility)`, making the code nicer. Plus the
next commit will add another field.
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Rollup of 7 pull requests
Successful merges:
- #112931 (Enable zlib in LLVM on aarch64-apple-darwin)
- #113158 (tests: unset `RUSTC_LOG_COLOR` in a test)
- #113173 (CI: include workflow name in concurrency group)
- #113335 (Reveal opaques in new solver)
- #113390 (CGU formation tweaks)
- #113399 (Structurally normalize again for byte string lit pat checking)
- #113412 (Add basic types to SMIR)
r? `@ghost`
`@rustbot` modify labels: rollup
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