This adds a "min-system-llvm-version" directive, so that a test can
indicate that it will either work with rust-llvm or with some minimal
system LLVM. This makes it simpler to write a test that requires an
LLVM patch that landed upstream and was then backported to rust-llvm.
always add an unreachable branch on matches to give more info to llvm
As part of https://github.com/djzin/rustc-optimization I discovered that some simple enum optimizations (src/unary/three_valued_enum.rs and src/unary/four_valued_enum.rs in the repo) are not applied - and the reason for this is that we erase the info that the discriminant of an enum is one of the options by putting the last one in an "otherwise" branch. This patch adds an extra branch so that LLVM can know what the possibilities are for the discriminant, which fixes the three- and four- valued cases.
Note that for whatever reason, this doesn't fix the case of 2 variants (most notably `Option` and `Result` have 2 variants) - a pass re-ordering might fix this or we may wish to add "assume" annotations on discriminants to force it to optimize.
MIR-borrowck: don't ICE for cannot move from array error
Closes#45694
compile-fail test E0508 now gives
```text
error[E0508]: cannot move out of type `[NonCopy; 1]`, a non-copy array (Ast)
--> .\src\test\compile-fail\E0508.rs:18:18
|
18 | let _value = array[0]; //[ast]~ ERROR E0508
| ^^^^^^^^
| |
| cannot move out of here
| help: consider using a reference instead: `&array[0]`
error[E0508]: cannot move out of type `[NonCopy; 1]`, a non-copy array (Mir)
--> .\src\test\compile-fail\E0508.rs:18:18
|
18 | let _value = array[0]; //[ast]~ ERROR E0508
| ^^^^^^^^ cannot move out of here
error: aborting due to 2 previous errors
```
Use #!/usr/bin/env as shebang for Bash scripts
On some systems, the bash command could be available in another
directory than /bin. As such, to offer an env shebang is more
convenient.
This make sense even for docker scripts, as you can use Docker
on FreeBSD or SmartOS for example.
update match-expressions.rs with DepNode labels
As a part of #44924, I have updated the match-expressions.rs. The PR has tests verified for the following dependency nodes for let-expressions
- MirValidated
- MirOptimized
- TypeCheckTables
- TypeOfItem
- GenericsOfItem
- PredicatesOfItem
- FnSignature
cc @michaelwoerister
r? @nikomatsakis
Use getrandom syscall for all Linux and Android targets.
I suppose we can use it in all Linux and Android targets. In function `is_getrandom_available` is checked if the syscall is available (getrandom syscall was add in version 3.17 of Linux kernel), if the syscall is not available `fill_bytes` fallback to reading from `/dev/urandom`.
Update libc to include getrandom related constants.
rustc_mir: hardcode pass list internally and remove premature pluggability.
Fixes#41712 by moving the MIR pass lists from `rustc_driver` to `rustc_mir`.
The application of the passes is done with the `rustc_mir::transform::run_passes` macro, which is public, as are all the passes AFAIK, and can be used to apply MIR passes outside of `rustc_mir`.
With the ability to override query providers through the `rustc_driver` (orthogonal to, and not included in this PR), custom drivers will be able to substitute the entire pass list if they want to.
**EDIT**: the aforementioned ability is added by #45944.
r? @nikomatsakis
incr.comp.: Don't crash in DepGraph::try_mark_green() when encountering a removed input node.
Fixes a small regression that was introduced in #45867.
r? @nikomatsakis
check::method - unify receivers before normalizing method signatures
Normalizing method signatures can unify inference variables, which can
cause receiver unification to fail. Unify the receivers first to avoid
that.
Fixes#36701.
Fixes#45801.
Fixes#45855.
r? @eddyb
beta-nominating because #43880 made this ICE happen in more cases (the code in that issue ICEs post-#43880 only, but the unit test here ICEs on all versions).
On some systems, the bash command could be available in another
directory than /bin. As such, to offer an env shebang is more
convenient.
This make sense even for docker scripts, as you can use Docker
on FreeBSD or SmartOS for example.
deduplicate projection error (E0271) messages
The `ErrorId` variant takes a u16 so that `DiagnosticMessageId` can retain
its `Copy` status (the present author's first choice having been the "EXXX"
code as a string).
The duplicated "type mismatch resolving `{}`" literal is unfortunate, but
the `struct_span_err!` macro (which we want to mark that error code as
used) is fussy about taking a literal, and the one-time-diagnostics set
needs an owned string.
This is concerning #33941 and probably #45805!
r? @estebank
MIR-borrowck: fix diagnostics for closures
Emit notes for captured variables in the same manner as AST borrowck.
```
error[E0499]: cannot borrow `x` as mutable more than once at a time (Ast)
--> $DIR/borrowck-closures-two-mut.rs:24:24
|
23 | let c1 = to_fn_mut(|| x = 4);
| -- - previous borrow occurs due to use of `x` in closure
| |
| first mutable borrow occurs here
24 | let c2 = to_fn_mut(|| x = 5); //~ ERROR cannot borrow `x` as mutable more than once
| ^^ - borrow occurs due to use of `x` in closure
| |
| second mutable borrow occurs here
25 | }
| - first borrow ends here
error[E0499]: cannot borrow `x` as mutable more than once at a time (Mir)
--> $DIR/borrowck-closures-two-mut.rs:24:24
|
23 | let c1 = to_fn_mut(|| x = 4);
| -- - previous borrow occurs due to use of `x` in closure
| |
| first mutable borrow occurs here
24 | let c2 = to_fn_mut(|| x = 5); //~ ERROR cannot borrow `x` as mutable more than once
| ^^ - borrow occurs due to use of `x` in closure
| |
| second mutable borrow occurs here
25 | }
| - first borrow ends here
```
Fixes#45362.
compiletest: Fix a couple of test re-run issues
* Re-run rustdoc tests if rustdoc or htmldocck.py was updated.
* Put stamp files in the correct subdirectories to avoid clashes when
the file names match but the subdirectory doesn't.
Fix test case header parsing code in presence of multiple revisions.
The previous code would parse the TestProps, and then parse them again with a revision set, adding some elements (like aux_builds) a second time to the existing TestProps.
