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Rollup of 7 pull requests #73790

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r? @ghost

Lucretiel and others added 28 commits May 28, 2020 15:02
Make it possible to customize the location of musl libdir using
musl-libdir in config.toml, e.g., to use lib64 instead of lib.
…s recently merged

This commit updates rustc's LLVM submodule to include new AVR-specific
fixes recently merged on the Rust LLVM 'rustc/10.0-2020-05-05' branch.

All of these cherry-picked commits exist in upstream LLVM and were
cherry-picked into Rust's LLVM fork in commit 6c040dd86ed.

  |- 6c040dd86ed Merge pull request rust-lang#66 from dylanmckay/avr-pick-upstream-llvm-fixes
    |- 12dfdd3aed7 [AVR] Rewrite the function calling convention.
    |- 118ac53f12b [AVR] Don't adjust for instruction size
    |- bc27c282e13 [AVR] Fix miscompilation of zext + add
    |- cfbe205a7e8 [AVR] Remove faulty stack pushing behavior
    |- 143e1469e96 [AVR] Fix stack size in functions with a frame pointer
    |- 6b2445d841e [LLVM][AVR] Support for R_AVR_6 fixup
    |- 93ee4da19cf [AVR]  Fix I/O instructions on XMEGA
    |- 962c2415ffb [AVR] Do not place functions in .progmem.data
    |- 65b8b170aef [AVR] Do not use divmod calls for bigger integers
    |- 93a3b595d1c [AVR] Generalize the previous interrupt bugfix to signal
    |- handlers too
    |- cc4286349b4 [AVR] Respect the 'interrupt' function attribute
    |- 954d0a92205 [AVR] Fix reads of uninitialized variables from constructor of AVRSubtarget
    |- 1c0ddae73c9 [AVR] Fix read of uninitialized variable AVRSubtarget:::ELFArch
    |- 0ed0823fe60 [AVR] Fix incorrect register state for LDRdPtr
    |- 96075fc433d [AVR] Don't adjust addresses by 2 for absolute values
    |- 6dfc55ba53b [AVR] Use correct register class for mul instructions

These changes include both correctness fixes and LLVM assertion error
fixes. Once all of these commits have been cherry-picked, all of the
LLVM plumbing for rust-lang/master to compile the AVR blink program will
be in place. Once this commit is merged, only PR rust-lang#73270 will
be blocking successful compilation and emission of the AVR LED blink program.
…unction

Signed-off-by: Nell Shamrell <nellshamrell@gmail.com>
This commit makes the JSON emitter use `-Z terminal-width` in the
"rendered" field of the JSON output.

Signed-off-by: David Wood <david@davidtw.co>
This new version includes a fix for building on aarch64 windows.
…atch, r=oli-obk

Stabilize `#![feature(const_if_match)]`

Quoting from the [stabilization report](rust-lang#49146 (comment)):

> `if` and `match` expressions as well as the short-circuiting logic operators `&&` and `||` will become legal in all [const contexts](https://doc.rust-lang.org/reference/const_eval.html#const-context). A const context is any of the following:
>
> - The initializer of a `const`, `static`, `static mut` or enum discriminant.
> - The body of a `const fn`.
> - The value of a const generic (nightly only).
> - The length of an array type (`[u8; 3]`) or an array repeat expression (`[0u8; 3]`).
>
> Furthermore, the short-circuiting logic operators will no longer be lowered to their bitwise equivalents (`&` and `|` respectively) in `const` and `static` initializers (see rust-lang#57175). As a result, `let` bindings can be used alongside short-circuiting logic in those initializers.

Resolves rust-lang#49146.

Ideally, we would resolve 🐳 rust-lang#66753 before this lands on stable, so it might be worth pushing this back a release. Also, this means we should get the process started for rust-lang#52000, otherwise people will have no recourse except recursion for iterative `const fn`.

r? @oli-obk
Added io forwarding methods to the stdio structs

Added methods to forward the `io::Read` and `io::Write` methods of the myriad wrapper structs in `stdio.rs` to their underlying readers / writers. This is especially important for the structs on the outside of a locking boundary, to ensure that the lock isn't being dropped and re-acquired in a loop.
bootstrap: Configurable musl libdir

Make it possible to customize the location of musl libdir using
musl-libdir in config.toml, e.g., to use lib64 instead of lib.
…e-with-picks, r=cuviper

[AVR] Update the rust-lang/llvm-project submodule to include AVR fixes recently merged

This PR updates rustc's LLVM submodule to include new AVR-specific
fixes recently merged on the Rust LLVM 'rustc/10.0-2020-05-05' branch.

All of these cherry-picked commits exist in upstream LLVM and were
cherry-picked into Rust's LLVM fork in commit 6c040dd86ed.

Relates to rust-lang/llvm-project#66

```
  |- 6c040dd86ed Merge pull request rust-lang#66 from dylanmckay/avr-pick-upstream-llvm-fixes
    |- 12dfdd3aed7 [AVR] Rewrite the function calling convention.
    |- 118ac53f12b [AVR] Don't adjust for instruction size
    |- bc27c282e13 [AVR] Fix miscompilation of zext + add
    |- cfbe205a7e8 [AVR] Remove faulty stack pushing behavior
    |- 143e1469e96 [AVR] Fix stack size in functions with a frame pointer
    |- 6b2445d841e [LLVM][AVR] Support for R_AVR_6 fixup
    |- 93ee4da19cf [AVR]  Fix I/O instructions on XMEGA
    |- 962c2415ffb [AVR] Do not place functions in .progmem.data
    |- 65b8b170aef [AVR] Do not use divmod calls for bigger integers
    |- 93a3b595d1c [AVR] Generalize the previous interrupt bugfix to signal
    |- handlers too
    |- cc4286349b4 [AVR] Respect the 'interrupt' function attribute
    |- 954d0a92205 [AVR] Fix reads of uninitialized variables from constructor of AVRSubtarget
    |- 1c0ddae73c9 [AVR] Fix read of uninitialized variable AVRSubtarget:::ELFArch
    |- 0ed0823fe60 [AVR] Fix incorrect register state for LDRdPtr
    |- 96075fc433d [AVR] Don't adjust addresses by 2 for absolute values
    |- 6dfc55ba53b [AVR] Use correct register class for mul instructions
```

These changes include both correctness fixes and LLVM assertion error
fixes. Once all of these commits have been cherry-picked, all of the
LLVM plumbing for rust-lang/master to compile the AVR blink program will
be in place. Once this commit is merged, only PR rust-lang#73270 will
be blocking successful compilation and emission of the AVR LED blink program.
Adds a clearer message for when the async keyword is missing from a f…

…unction

This is a somewhat simple fix for rust-lang#66731.

Under the current version of Rust, if a user has a rust file that looks like this:

```rust
fn boo (){}

async fn foo() {
    boo().await;
}

fn main() {

}
```

And they attempt to run it, they will receive an error message that looks like this:

```bash
error: incorrect use of `await`                                                                                                        --> test.rs:4:14                                                                                                                       |                                                                                                                                   4 |     boo.await();                                                                                                                    |              ^^ help: `await` is not a method call, remove the parentheses                                                                                                                                                                                              error[E0277]: the trait bound `fn() {boo}: std::future::Future` is not satisfied                                                        --> test.rs:4:5                                                                                                                        |                                                                                                                                  4  |     boo.await();                                                                                                                    |     ^^^^^^^^^ the trait `std::future::Future` is not implemented for `fn() {boo}`                                                                                                                                                                                      error: aborting due to 2 previous errors                                                                                                                                                                                                                                    For more information about this error, try `rustc --explain E0277`.
```

This is not very clear.

With the changes made in this PR, when a user compiles and runs that same rust code, they will receive an error message that looks like this:

```bash
error[E0277]: `()` is not a future.
 --> test.rs:4:5
  |
4 |     boo().await;
  |     ^^^^^^^^^^^ `()` is not a future
  |
  = help: the trait `std::future::Future` is not implemented for `()`
  = note: required by `std::future::Future::poll`
```

In the future, I think we should make this error message even clearer, perhaps through a solution like the one described in [this comment](rust-lang#66731 (comment)). However, as that potentially involves a major change proposal, I would rather get this change in now and make the error message a little clearer while an MCP is drafted and discussed.

Signed-off-by: Nell Shamrell <nellshamrell@gmail.com>
…er, r=estebank

errors: use `-Z terminal-width` in JSON emitter

This PR makes the JSON emitter use `-Z terminal-width` in the "rendered" field of the JSON output.

r? @estebank
Update psm version

This new version includes a fix for building on aarch64 windows.

cc rust-lang#72881
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@rustbot modify labels: +rollup
@bors r+ rollup=never p=5

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bors commented Jun 27, 2020

📌 Commit 2a941c5 has been approved by Manishearth

@rustbot rustbot added the rollup A PR which is a rollup label Jun 27, 2020
@bors bors added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label Jun 27, 2020
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bors commented Jun 27, 2020

⌛ Testing commit 2a941c5 with merge 8b0307b3fc81f89acca6246dce6c2682a081b6c8...

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bors commented Jun 27, 2020

💥 Test timed out

@bors bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Jun 27, 2020
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@bors retry

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jun 27, 2020
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bors commented Jun 27, 2020

⌛ Testing commit 2a941c5 with merge 1956dbe254cfb0c88c42636b71287403fb070c5e...

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arm-android decided to be slow

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bors commented Jun 27, 2020

💥 Test timed out

@bors bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Jun 27, 2020
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Something fishy is going on. Windows dist-i686-mingw and dist-x86_64-msvc-alt this time.

@dylanmckay any chance the LLVM update caused a slowdown?

@Manishearth Manishearth deleted the rollup-fqb17zz branch July 18, 2020 01:15
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