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56 Commits

Author SHA1 Message Date
Matthew Jasper
d4d9e7f67f Remove unused part of return value from replace_bound_vars_with_placeholders 2020-10-06 11:19:30 +01:00
Matthew Jasper
f958e6c246 Separate bounds and predicates for associated/opaque types 2020-10-06 11:19:29 +01:00
Matthew Jasper
0eb87ed55f Rename projection_predicates to item_bounds 2020-10-06 11:18:45 +01:00
bors
ea7e131435 Auto merge of #77171 - VFLashM:better_sso_structures, r=oli-obk 
Better sso structures

This change greatly expands interface of MiniSet/MiniMap and renames them because they are no longer "Mini".
 2020-10-05 17:18:01 +00:00
Dylan MacKenzie
c4d8089f00 Revert "Add an unused field of type Option<DefId> to ParamEnv struct." 
This reverts commit ab83d372ed.
 2020-09-26 21:01:09 -07:00
Valerii Lashmanov
5c224a484d MiniSet/MiniMap moved and renamed into SsoHashSet/SsoHashMap 
It is a more descriptive name and with upcoming changes
there will be nothing "mini" about them.
 2020-09-26 14:30:05 -05:00
Ralf Jung
9e02642fb3
Rollup merge of #77211 - est31:remove_unused_allow, r=oli-obk 
Remove unused #[allow(...)] statements from compiler/
 2020-09-26 12:58:34 +02:00
Ralf Jung
ac8169dc10
Rollup merge of #77093 - lcnr:const-generics-infer-warning, r=varkor 
merge `need_type_info_err(_const)`

I hoped that this would automatically solve #76737 but it doesn't quite seem like it

fixes #77092

r? @varkor
 2020-09-26 12:58:17 +02:00
Bastian Kauschke
9a607c0a27 unused into 2020-09-26 10:31:34 +02:00
Bastian Kauschke
32195ac8f4 rename functions 2020-09-26 10:28:15 +02:00
est31
12187b7f86 Remove unused #[allow(...)] statements from compiler/ 2020-09-26 01:25:55 +02:00
marmeladema
9f50c49117 Implement Display for DisambiguatedDefPathData and DefPathData 2020-09-25 22:46:15 +01:00
marmeladema
f1878d19fa Move from {{closure}}#0 syntax to {closure#0} for (def) path components 2020-09-25 22:46:14 +01:00
Jonas Schievink
6f3da3d53f
Rollup merge of #77121 - duckymirror:html-root-url, r=jyn514 
Updated html_root_url for compiler crates

Closes #77103

r? @jyn514
 2020-09-25 02:29:45 +02:00
Bastian Kauschke
e5430e5306 the two hardest things in programming, names and... 2020-09-24 22:01:46 +02:00
Erik Hofmayer
138a2e5eaa /nightly/nightly-rustc 2020-09-23 21:51:56 +02:00
Erik Hofmayer
dd66ea2d3d Updated html_root_url for compiler crates 2020-09-23 21:14:43 +02:00
Bastian Kauschke
0e84b61053 use relevant span when unifying ConstVarValues 2020-09-23 11:00:44 +02:00
Bastian Kauschke
3dbfdb0182 use the correct span when dealing with inference variables 2020-09-23 10:44:11 +02:00
Bastian Kauschke
0abb1abf04 unused path 2020-09-23 10:06:32 +02:00
Bastian Kauschke
45d92b43e3 merge need_type_info_err(_const) 2020-09-23 09:24:58 +02:00
Andreas Jonson
6586c37bec Move MiniSet to data_structures 
remove the need for T to be copy from MiniSet as was done for MiniMap
 2020-09-23 08:09:16 +02:00
bors
6d3acf5129 Auto merge of #76928 - lcnr:opaque-types-cache, r=tmandry 
cache types during normalization

partially fixes #75992

reduces the following test from 14 to 3 seconds locally.

cc `@Mark-Simulacrum` would it make sense to add that test to `perf`?
```rust
#![recursion_limit="2048"]
#![type_length_limit="112457564"]

pub async fn h0(v: &String, x: &u64) { println!("{} {}", v, x) }
pub async fn h1(v: &String, x: &u64) { h0(v, x).await }
pub async fn h2(v: &String, x: &u64) { h1(v, x).await }
pub async fn h3(v: &String, x: &u64) { h2(v, x).await }
pub async fn h4(v: &String, x: &u64) { h3(v, x).await }
pub async fn h5(v: &String, x: &u64) { h4(v, x).await }
pub async fn h6(v: &String, x: &u64) { h5(v, x).await }
pub async fn h7(v: &String, x: &u64) { h6(v, x).await }
pub async fn h8(v: &String, x: &u64) { h7(v, x).await }
pub async fn h9(v: &String, x: &u64) { h8(v, x).await }

pub async fn h10(v: &String, x: &u64) { h9(v, x).await }
pub async fn h11(v: &String, x: &u64) { h10(v, x).await }
pub async fn h12(v: &String, x: &u64) { h11(v, x).await }
pub async fn h13(v: &String, x: &u64) { h12(v, x).await }
pub async fn h14(v: &String, x: &u64) { h13(v, x).await }
pub async fn h15(v: &String, x: &u64) { h14(v, x).await }
pub async fn h16(v: &String, x: &u64) { h15(v, x).await }
pub async fn h17(v: &String, x: &u64) { h16(v, x).await }
pub async fn h18(v: &String, x: &u64) { h17(v, x).await }
pub async fn h19(v: &String, x: &u64) { h18(v, x).await }

macro_rules! async_recursive {
    (29, $inner:expr) => { async { async_recursive!(28, $inner) }.await };
    (28, $inner:expr) => { async { async_recursive!(27, $inner) }.await };
    (27, $inner:expr) => { async { async_recursive!(26, $inner) }.await };
    (26, $inner:expr) => { async { async_recursive!(25, $inner) }.await };
    (25, $inner:expr) => { async { async_recursive!(24, $inner) }.await };
    (24, $inner:expr) => { async { async_recursive!(23, $inner) }.await };
    (23, $inner:expr) => { async { async_recursive!(22, $inner) }.await };
    (22, $inner:expr) => { async { async_recursive!(21, $inner) }.await };
    (21, $inner:expr) => { async { async_recursive!(20, $inner) }.await };
    (20, $inner:expr) => { async { async_recursive!(19, $inner) }.await };

    (19, $inner:expr) => { async { async_recursive!(18, $inner) }.await };
    (18, $inner:expr) => { async { async_recursive!(17, $inner) }.await };
    (17, $inner:expr) => { async { async_recursive!(16, $inner) }.await };
    (16, $inner:expr) => { async { async_recursive!(15, $inner) }.await };
    (15, $inner:expr) => { async { async_recursive!(14, $inner) }.await };
    (14, $inner:expr) => { async { async_recursive!(13, $inner) }.await };
    (13, $inner:expr) => { async { async_recursive!(12, $inner) }.await };
    (12, $inner:expr) => { async { async_recursive!(11, $inner) }.await };
    (11, $inner:expr) => { async { async_recursive!(10, $inner) }.await };
    (10, $inner:expr) => { async { async_recursive!(9, $inner) }.await };

    (9, $inner:expr) => { async { async_recursive!(8, $inner) }.await };
    (8, $inner:expr) => { async { async_recursive!(7, $inner) }.await };
    (7, $inner:expr) => { async { async_recursive!(6, $inner) }.await };
    (6, $inner:expr) => { async { async_recursive!(5, $inner) }.await };
    (5, $inner:expr) => { async { async_recursive!(4, $inner) }.await };
    (4, $inner:expr) => { async { async_recursive!(3, $inner) }.await };
    (3, $inner:expr) => { async { async_recursive!(2, $inner) }.await };
    (2, $inner:expr) => { async { async_recursive!(1, $inner) }.await };
    (1, $inner:expr) => { async { async_recursive!(0, $inner) }.await };
    (0, $inner:expr) => { async { h19(&String::from("owo"), &0).await; $inner }.await };
}

async fn f() {
    async_recursive!(14, println!("hello"));
}

fn main() {
    let _ = f();
}
```
r? `@eddyb` requires a perf run.
 2020-09-22 22:52:07 +00:00
ecstatic-morse
dcf4d1f2be
Rollup merge of #76888 - matthiaskrgr:clippy_single_match_2, r=Dylan-DPC 
use if let instead of single match arm expressions

use if let instead of single match arm expressions to compact code and reduce nesting (clippy::single_match)
 2020-09-21 20:40:55 -07:00
bors
45198456be Auto merge of #76913 - vandenheuvel:performance_debug, r=lcnr 
Fixing the performance regression of #76244

Issue https://github.com/rust-lang/rust/issues/74865 suggested that removing the `def_id` field from `ParamEnv` would improve performance. PR https://github.com/rust-lang/rust/pull/76244 implemented this change.

Generally, [results](https://perf.rust-lang.org/compare.html?start=80fc9b0ecb29050d45b17c64af004200afd3cfc2&end=5ef250dd2ad618ee339f165e9b711a1b4746887d) were as expected: an instruction count decrease of about a percent. The instruction count for the unicode crates increased by about 3%, which `@nnethercote` speculated to be caused by a quirk of inlining or codegen. As the results were generally positive, and for chalk integration, this was also a step in the right direction, the PR was r+'d regardless.

However, [wall-time performance results](https://perf.rust-lang.org/compare.html?start=a055c5a1bd95e029e9b31891db63b6dc8258b472&end=7402a394471a6738a40fea7d4f1891666e5a80c5&stat=task-clock) show a much larger performance degradation: 25%, as [mentioned](https://github.com/rust-lang/rust/pull/76244#issuecomment-694459840) by `@Mark-Simulacrum.`

This PR, for now, reverts #76244 and attempts to find out, which change caused the regression.
 2020-09-22 00:22:24 +00:00
Bastian Kauschke
073127a04f check for cycles when unifying const variables 2020-09-21 12:27:55 +02:00
Bram van den Heuvel
ab83d372ed Add an unused field of type Option<DefId> to ParamEnv struct. 2020-09-21 09:39:26 +02:00
bors
41507ed0d5 Auto merge of #76964 - RalfJung:rollup-ybn06fs, r=RalfJung 
Rollup of 15 pull requests

Successful merges:

 - #76722 (Test and fix Send and Sync traits of BTreeMap artefacts)
 - #76766 (Extract some intrinsics out of rustc_codegen_llvm)
 - #76800 (Don't generate bootstrap usage unless it's needed)
 - #76809 (simplfy condition in ItemLowerer::with_trait_impl_ref())
 - #76815 (Fix wording in mir doc)
 - #76818 (Don't compile regex at every function call.)
 - #76821 (Remove redundant nightly features)
 - #76823 (black_box: silence unused_mut warning when building with cfg(miri))
 - #76825 (use `array_windows` instead of `windows` in the compiler)
 - #76827 (fix array_windows docs)
 - #76828 (use strip_prefix over starts_with and manual slicing based on pattern length (clippy::manual_strip))
 - #76840 (Move to intra doc links in core/src/future)
 - #76845 (Use intra docs links in core::{ascii, option, str, pattern, hash::map})
 - #76853 (Use intra-doc links in library/core/src/task/wake.rs)
 - #76871 (support panic=abort in Miri)

Failed merges:

r? `@ghost`
 2020-09-20 11:02:36 +00:00
Ralf Jung
4322e1b92d
Rollup merge of #76821 - est31:remove_redundant_nightly_features, r=oli-obk,Mark-Simulacrum 
Remove redundant nightly features

Removes a bunch of redundant/outdated nightly features. The first commit removes a `core_intrinsics` use for which a stable wrapper has been provided since. The second commit replaces the `const_generics` feature with `min_const_generics` which might get stabilized this year. The third commit is the result of a trial/error run of removing every single feature and then adding it back if compile failed. A bunch of unused features are the result that the third commit removes.
 2020-09-20 12:08:22 +02:00
Matthias Krüger
c690c82ad4 use if let instead of single match arm expressions to compact code and reduce nesting (clippy::single_match) 2020-09-20 11:42:52 +02:00
Bastian Kauschke
1146c39da7 cache types during normalization 2020-09-19 17:27:13 +02:00
Oliver Scherer
888afd50d9 Unify the names of const eval queries and their return types 2020-09-19 10:36:36 +02:00
bors
fdc3405c20 Auto merge of #72412 - VFLashM:issue-72408-nested-closures-exponential, r=tmandry 
Issue 72408 nested closures exponential

This fixes #72408.

Nested closures were resulting in exponential compilation time.

This PR is enhancing asymptotic complexity, but also increasing the constant, so I would love to see perf run results.
 2020-09-18 14:08:39 +00:00
Tyler Mandry
3ccb1c37e6 Remove redundancy in cache key 2020-09-18 09:03:53 +00:00
Valerii Lashmanov
f583513dc2 Intorduced MiniMap - a tiny small storage optimized map implementation 
This makes everything about 1% faster in rustc-perf,
mostly negating performance hit of previous commit.
 2020-09-17 20:44:11 -05:00
Valerii Lashmanov
17d2e3b5d2 Better handling for exponential-sized types in misc places 
Mostly to fix ui/issues/issue-37311-type-length-limit/issue-37311.rs.

Most parts of the compiler can handle deeply nested types with a lot
of duplicates just fine, but some parts still attempt to naively
traverse type tree.

Before such problems were caught by type length limit check,
but now these places will have to be changed to handle
duplicated types gracefully.
 2020-09-17 20:44:11 -05:00
Valerii Lashmanov
2f3296192b Only visit types once when walking the type tree 
This fixes #72408.

Nested closures were resulting in exponential compilation time.

As a performance optimization this change introduces MiniSet,
which is a simple small storage optimized set.
 2020-09-17 20:44:11 -05:00
est31
ebdea01143 Remove redundant #![feature(...)] 's from compiler/ 2020-09-17 07:58:45 +02:00
Tyler Mandry
a6c4d30c7b
Rollup merge of #76756 - matthiaskrgr:cl123ppy, r=Dylan-DPC 
fix a couple of stylistic clippy warnings

namely:

clippy::redundant_pattern_matching
clippy::redundant_pattern
clippy::search_is_some
clippy::filter_next
clippy::into_iter_on_ref
clippy::clone_on_copy
clippy::needless_return
 2020-09-16 12:24:17 -07:00
Dylan DPC
3f9e7fc049
Rollup merge of #76699 - lcnr:const-infer-err, r=varkor 
improve const infer error

cc #72328

reduces it from
```
error[E0282]: type annotations needed
  --> src/main.rs:17:5
   |
17 |     Foo.bar().bar().bar().bar().baz();
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: unable to infer the value of a const parameter
```
to
```
error[E0282]: type annotations needed
  --> $DIR/method-chain.rs:21:33
   |
LL |     Foo.bar().bar().bar().bar().baz();
   |                                 ^^^
   |
   = note: cannot infer the value of the const parameter `N`
```

r? @varkor
 2020-09-16 12:34:21 +02:00
Matthias Krüger
73d4171ea6 fix a couple of stylistic clippy warnings 
namely:

clippy::redundant_pattern_matching
clippy::redundant_pattern
clippy::search_is_some
clippy::filter_next
clippy::into_iter_on_ref
clippy::clone_on_copy
clippy::needless_return
 2020-09-15 22:44:54 +02:00
bors
41dc3942eb Auto merge of #75608 - estebank:suggest-boxed-match-exprs, r=lcnr,varkor 
More structured suggestions for boxed trait objects instead of impl Trait on non-coerceable tail expressions

When encountering a `match` or `if` as a tail expression where the
different arms do not have the same type *and* the return type of that
`fn` is an `impl Trait`, check whether those arms can implement `Trait`
and if so, suggest using boxed trait objects.

Use structured suggestion for `impl T` to `Box<dyn T>`.

Fix https://github.com/rust-lang/rust/issues/69107
 2020-09-14 19:57:57 +00:00
Bastian Kauschke
035f879166 improve const infer err 2020-09-14 10:08:32 +02:00
Bastian Kauschke
dd57275c3e shrink const infer error 2020-09-14 09:45:22 +02:00
bors
7402a39447 Auto merge of #76244 - vandenheuvel:remove__paramenv__def_id, r=nikomatsakis 
Removing the `def_id` field from hot `ParamEnv` to make it smaller

This PR addresses https://github.com/rust-lang/rust/issues/74865.
 2020-09-13 16:28:22 +00:00
Esteban Küber
dc53cfea7e Add test cases and address review comments 2020-09-11 17:05:18 -07:00
Esteban Küber
5d2a935e6c Make suggestion more complete 2020-09-11 17:05:18 -07:00
Esteban Küber
ff297fafbf Make suggestion have a more targetted underline 2020-09-11 17:05:18 -07:00
Esteban Küber
fd9133b9c3 Suggest boxed trait objects in tail match and if expressions 
When encountering a `match` or `if` as a tail expression where the
different arms do not have the same type *and* the return type of that
`fn` is an `impl Trait`, check whether those arms can implement `Trait`
and if so, suggest using boxed trait objects.
 2020-09-11 17:05:18 -07:00
Matthias Krüger
9bb10cc907 use push(char) instead of push_str(&str) to add single chars to strings 
clippy::single-char-push-str
 2020-09-10 13:58:41 +02:00