Fixes compilation without -Ztrim-diagnostic-paths=no

Per their documentation, the `max_value()` and `min_value()` associated functions have been superseded by the `MAX` and `MIN` associated constants since Rust 1.43 and are considered "soft deprecated", with all uses currently being replaced in the rustc repo.

Prefer numeric associated constants in example

Fixes bootstrapping of rustc using cg_clif

Fixes rust-lang#1097

Update Cranelift

Rename trans to codegen

Fixes rust-lang#1102

They have no effect there, but were silently accepted.

…ces` lint

This lint was incorrectly suggesting casting a function to a pointer without
specifying generic type parameters or const generics. This would cause a
compiler error since the missing parameters couldn't be inferred. This commit
fixed the suggestion and added a few tests with generics.

(From the PR feedback.)

Co-authored-by: Esteban Küber <esteban@kuber.com.ar>

Build system refactor

Test bootstrapping of rustc using cg_clif

…g_clif-2020-11-01

Even more information to try and debug rust-lang#78665.

Add support for SHA256 source file hashing

Adds support for `-Z src-hash-algorithm sha256`, which became available in LLVM 11.

Using an older version of LLVM will cause an error `invalid checksum kind` if the hash algorithm is set to sha256.

r? `@eddyb`
cc rust-lang#70401 `@est31`

…=jyn514

Sync rustc_codegen_cranelift

This fixes bootstrapping of rustc using cg_clif again. It regressed a while before rust-lang#77975 got merged.

Fixes https://github.com/bjorn3/rustc_codegen_cranelift/issues/743

…-trait-impl, r=estebank

Improve errors about #[deprecated] attribute

This change:

1. Turns `#[deprecated]` on a trait impl block into an error, which fixes rust-lang#78625;
2. Changes these and other errors about `#[deprecated]` to use the span of the attribute instead of the item; and
3. Turns this error into a lint, to make sure it can be capped with `--cap-lints` and doesn't break any existing dependencies.

Can be reviewed per commit.

---
Example:
```rust
struct X;

#[deprecated = "a"]
impl Default for X {
    #[deprecated = "b"]
    fn default() -> Self {
        X
    }
}
```

Before:
```
error: This deprecation annotation is useless
 --> src/main.rs:6:5
  |
6 | /     fn default() -> Self {
7 | |         X
8 | |     }
  | |_____^
```

After:
```
error: this `#[deprecated]' annotation has no effect
 --> src/main.rs:3:1
  |
3 | #[deprecated = "a"]
  | ^^^^^^^^^^^^^^^^^^^ help: try removing the deprecation attribute
  |
  = note: `#[deny(useless_deprecated)]` on by default

error: this `#[deprecated]' annotation has no effect
 --> src/main.rs:5:5
  |
5 |     #[deprecated = "b"]
  |     ^^^^^^^^^^^^^^^^^^^ help: try removing the deprecation attribute
```

Corrected suggestion for generic parameters in `function_item_references` lint

This commit handles functions with generic type parameters like you pointed out as well as const generics. Also this is probably a minor thing, but the type alias you used in the example doesn't show up so the suggestion right now would be `size_of::<[u8; 16]> as fn() ->`. This is because the lint checker works with MIR instead of HIR. I don't think we can get the alias at that point, but let me know if I'm wrong and there's a way to fix this. Also I put you as the reviewer, but I'm not sure if you want to review it or if it makes more sense to ask one of the original reviewers of this lint.
closes rust-lang#78571

…acrum

Suggest library/std when running all stage 0 tests

r? ``@Mark-Simulacrum``
cc ``@ijackson``

For context, this came out of a discord conversation where ``@ijackson`` was running `test --stage 1` when they were only adding doc-tests to the standard library.

Show more error information in lldb_batchmode

Even more information to try and debug rust-lang#78665.

…, r=Mark-Simulacrum

Fix panic in bootstrap for non-workspace path dependencies.

If you add a `path` dependency to a `Cargo.toml` that is located outside of the workspace, then the `in_tree_crates` function can panic because it finds a path dependency that is not defined (since it uses `cargo metadata --no-deps`).  This fixes it by skipping over those entries, which are usually not things you select on the command-line.

Fixes rust-lang#78617