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Rename rustc_middle::cstore::DepKind to CrateDepKind
It is ambiguous with DepGraph's own DepKind.
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r=Mark-Simulacrum
rustc: Ignore fs::canonicalize errors in metadata
This commit updates the metadata location logic to ignore errors when
calling `fs::canonicalize`. Canonicalization was added historically so
multiple `-L` paths to the same directory don't print errors about
multiple candidates (since rustc can deduplicate same-named paths), but
canonicalization doesn't work on all filesystems. Cargo, for example,
always uses this sort of fallback where it will opportunitistically try
to canonicalize but fall back to using the input path if it otherwise
doesn't work.
If rustc is run on a filesystem that doesn't support canonicalization
then the effect of this change will be that `-L` paths which logically
point to the same directory will cause errors, but that's a rare enough
occurrence it shouldn't cause much issue in practice. Otherwise rustc
doesn't work at all today on those sorts of filesystem where
canonicalization isn't supported!
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This commit updates the metadata location logic to ignore errors when
calling `fs::canonicalize`. Canonicalization was added historically so
multiple `-L` paths to the same directory don't print errors about
multiple candidates (since rustc can deduplicate same-named paths), but
canonicalization doesn't work on all filesystems. Cargo, for example,
always uses this sort of fallback where it will opportunitistically try
to canonicalize but fall back to using the input path if it otherwise
doesn't work.
If rustc is run on a filesystem that doesn't support canonicalization
then the effect of this change will be that `-L` paths which logically
point to the same directory will cause errors, but that's a rare enough
occurrence it shouldn't cause much issue in practice. Otherwise rustc
doesn't work at all today on those sorts of filesystem where
canonicalization isn't supported!
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Replace all uses of `log::log_enabled` with `Debug` printers
cc @RalfJung this touches a bunch of logging in the miri engine. There are some visual changes, mainly that in several cases we stop prepending lines with the module path and just have a newline.
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This is a very obscure corner case, and should never be hit in practice.
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This commit introduces a `FiniteBitSet` type which replaces the manual
bit manipulation which was being performed in polymorphization.
Signed-off-by: David Wood <david@davidtw.co>
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This commit records the results of `unused_generic_params` in crate
metadata, hopefully improving performance.
Signed-off-by: David Wood <david@davidtw.co>
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They are deprecated so doing extra work for error recovery doesn't make sense
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Support const args in type dependent paths (Take 2)
once more, except it is sound this time :smiling_face_with_three_hearts: previously #71154
-----
```rust
#![feature(const_generics)]
struct A;
impl A {
fn foo<const N: usize>(&self) -> usize { N }
}
struct B;
impl B {
fn foo<const N: usize>(&self) -> usize { 42 }
}
fn main() {
let a = A;
a.foo::<7>();
}
```
When calling `type_of` for generic const arguments, we now use the `TypeckTables` of the surrounding body to get the expected type.
This alone causes cycle errors though, as we now have `typeck_tables_of(main)` -> `...` ->
`type_of(main_ANON0 := 7)` -> `typeck_tables_of(main)` :zap: (see https://github.com/rust-lang/rust/issues/68400#issuecomment-611760290)
To prevent this we must not call `type_of(const_arg)` during `typeck_tables_of`. This is achieved by
calling `type_of(param_def_id)` instead.
We have to somehow remember the `DefId` of the param through all of typeck, which is done using the
struct `ty::WithOptConstParam<DefId>`, which replaces `DefId` where needed and contains an `Option<DefId>` to
be able to store the const parameter in case it exists.
Queries which are currently cached on disk are split into two variants: `query_name`(cached) and `query_name_(of|for)_const_arg`(not cached), with `query_name_of_const_arg` taking a pair `(did, param_did): (LocalDefId, DefId)`.
For some queries a method `query_name_of_opt_const_arg` is added to `TyCtxt` which takes a `ty::WithOptConstParam` and either calls `query_name` or `query_name_of_const_arg` depending on the value of `const_param_did`.
r? @eddyb @varkor
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This eliminates a bunch of `Symbol::intern()` and `Symbol::as_str()`
calls, which is good, because they require locking the interner.
Note that the unsafety in `from_cycle_error()` is identical to the
unsafety on other adjacent impls.
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In various ways, such as changing functions to take a `Symbol` instead
of a `&str`.
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Note that the output of `unpretty-debug.stdout` has changed. In that
test the hash values are normalized from a symbol numbers to small
numbers like "0#0" and "0#1". The increase in the number of static
symbols must have caused the original numbers to contain more digits,
resulting in different pretty-printing prior to normalization.
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Other terms are more inclusive and precise.
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Provide more information on duplicate lang item error.
This gives some notes on the location of the files where the lang items were loaded from. Some duplicate lang item errors can be a little confusing, and this might help in diagnosing what has happened.
Here's an example when hitting a bug with Cargo's build-std:
```
error: duplicate lang item in crate `core` (which `rustc_std_workspace_core` depends on): `try`.
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= note: the lang item is first defined in crate `core` (which `z10` depends on)
= note: first definition in `core` loaded from /Users/eric/Proj/rust/cargo/scratch/z10/target/target/debug/deps/libcore-a764da499c7385f4.rmeta
= note: second definition in `core` loaded from /Users/eric/Proj/rust/cargo/scratch/z10/target/target/debug/deps/libcore-5b082675aea34986.rmeta
```
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Normally, we encode a `Span` that references a foreign `SourceFile` by
encoding information about the foreign crate. When we decode this
`Span`, we lookup the foreign crate in order to decode the `SourceFile`.
However, this approach does not work for proc-macro crates. When we load
a proc-macro crate, we do not deserialzie any of its dependencies (since
a proc-macro crate can only export proc-macros). This means that we
cannot serialize a reference to an upstream crate, since the associated
metadata will not be available when we try to deserialize it.
This commit modifies foreign span handling so that we treat all foreign
`SourceFile`s as local `SourceFile`s when serializing a proc-macro.
All `SourceFile`s will be stored into the metadata of a proc-macro
crate, allowing us to cotinue to deserialize a proc-macro crate without
needing to load any of its dependencies.
Since the number of foreign `SourceFile`s that we load during a
compilation session may be very large, we only serialize a `SourceFile`
if we have also serialized a `Span` which requires it.
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Also, implement this query for the local crate, not just foreign crates.
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Move remaining `NodeId` APIs from `Definitions` to `Resolver`
Implements https://github.com/rust-lang/rust/pull/73291#issuecomment-643515557
TL;DR: it moves all fields that are only needed during name resolution passes into the `Resolver` and keep the rest in `Definitions`. This effectively enforces that all references to `NodeId`s are gone once HIR lowering is completed.
After this, the only remaining work for #50928 should be to adjust the dev guide.
r? @petrochenkov
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code coverage foundation for hash and num_counters
This PR is the next iteration after PR #73011 (which is still waiting on bors to merge).
@wesleywiser - PTAL
r? @tmandry
(FYI, I'm also working on injecting the coverage maps, in another branch, while waiting for these to merge.)
Thanks!
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r=nikomatsakis"
This reverts commit 372cb9b69c76a042d0b9d4b48ff6084f64c84a2c, reversing
changes made to 5c61a8dc34c3e2fc6d7f02cb288c350f0233f944.
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Properly encode AnonConst into crate metadata
Fixes #68104
Previous, we were encoding AnonConst as a regular Const, causing us to
treat them differently after being deserialized in another compilation
session.
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Replaced dummy values for hash and num_counters with computed values,
and refactored InstrumentCoverage pass to simplify injecting more
counters per function in upcoming versions.
Improved usage documentation and error messaging.
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first stage of implementing LLVM code coverage
This PR replaces #70680 (WIP toward LLVM Code Coverage for Rust) since I am re-implementing the Rust LLVM code coverage feature in a different part of the compiler (in MIR pass(es) vs AST).
This PR updates rustc with `-Zinstrument-coverage` option that injects the llvm intrinsic `instrprof.increment()` for code generation.
This initial version only injects counters at the top of each function, and does not yet implement the required coverage map.
Upcoming PRs will add the coverage map, and add more counters and/or counter expressions for each conditional code branch.
Rust compiler MCP https://github.com/rust-lang/compiler-team/issues/278
Relevant issue: #34701 - Implement support for LLVMs code coverage instrumentation
***[I put together some development notes here, under a separate branch.](https://github.com/richkadel/rust/blob/cfa0b21d34ee64e4ebee226101bd2ef0c6757865/src/test/codegen/coverage-experiments/README-THIS-IS-TEMPORARY.md)***
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Disallow loading crates with non-ascii identifier name.
This turns off external crate loading with non-ascii identifier names.
cc #55467.
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If config.toml `profiler = false`, the test/mir-opt/instrument_coverage
test is ignored. Otherwise, this patch ensures the profiler_runtime is
loaded when -Zinstrument-coverage is enabled. Confirmed that this works
for MacOS.
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Rollup of 10 pull requests
Successful merges:
- #72707 (Use min_specialization in the remaining rustc crates)
- #72740 (On recursive ADT, provide indirection structured suggestion)
- #72879 (Miri: avoid tracking current location three times)
- #72938 (Stabilize Option::zip)
- #73086 (Rename "cyclone" to "apple-a7" per changes in upstream LLVM)
- #73104 (Example about explicit mutex dropping)
- #73139 (Add methods to go from a nul-terminated Vec<u8> to a CString)
- #73296 (Remove vestigial CI job msvc-aux.)
- #73304 (Revert heterogeneous SocketAddr PartialEq impls)
- #73331 (extend network support for HermitCore)
Failed merges:
r? @ghost
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Use min_specialization in the remaining rustc crates
This adds a lot of `transmute` calls to replace the unsound uses of specialization.
It's ugly, but at least it's honest about what's going on.
cc #71420, @RalfJung
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Rollup of 10 pull requests
Successful merges:
- #71824 (Check for live drops in constants after drop elaboration)
- #72389 (Explain move errors that occur due to method calls involving `self`)
- #72556 (Fix trait alias inherent impl resolution)
- #72584 (Stabilize vec::Drain::as_slice)
- #72598 (Display information about captured variable in `FnMut` error)
- #73336 (Group `Pattern::strip_*` method together)
- #73341 (_match.rs: fix module doc comment)
- #73342 (Fix iterator copied() documentation example code)
- #73351 (Update E0446.md)
- #73353 (structural_match: non-structural-match ty closures)
Failed merges:
r? @ghost
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