* Removes `RustJITMemoryManager` from public API.
This was really sort of an implementation detail to begin with.
* `__morestack` is linked to C++ wrapper code and this pointer
is used when resolving the symbol for `ExecutionEngine` code.
* `__morestack_addr` is also resolved for `ExecutionEngine` code.
This function is sometimes referenced in LLVM-generated code,
but was not able to be resolved on Mac OS systems.
* Added Windows support to `ExecutionEngine` API.
* Added a test for basic `ExecutionEngine` functionality.
* Removes `RustJITMemoryManager` from public API.
This was really sort of an implementation detail to begin with.
* `__morestack` is linked to C++ wrapper code and this pointer
is used when resolving the symbol for `ExecutionEngine` code.
* `__morestack_addr` is also resolved for `ExecutionEngine` code.
This function is sometimes referenced in LLVM-generated code,
but was not able to be resolved on Mac OS systems.
* Added Windows support to `ExecutionEngine` API.
* Added a test for basic `ExecutionEngine` functionality.
With the latter is provided by the `From` conversion trait, the former is now completely redundant. Their code is identical. Let’s deprecate now and plan to remove in the next cycle. (It’s `#[unstable]`.)
r? @alexcrichton
CC @nagisa
This makes the maximum edit distance of typo suggestions a function of the typo'd name's length. FWIW, clang uses this same hueristic, and I've found their suggestions to be better than rustc's. Without something like this, you end up with suggestions that aren't related at all when there are short variable names.
See also https://github.com/rust-lang/rust/issues/20028#issuecomment-109767159
Part of #24407.
Currently the diagnostics for range patterns are a bit wrong:
```rust
fn main() {
match 5u32 {
0 ... 10 => (),
'a' ... 10 => (),
10 ... 'z' => (),
"what" ... 10 => (),
"what" ... "well" => (),
10 ... "what" => ()
}
}
```
```
range.rs:4:9: 4:19 error: mismatched types in range:
expected integral variable,
found char [E0211]
range.rs:4 'a' ... 10 => (),
^~~~~~~~~~
range.rs:4:9: 4:16 error: only char and numeric types are allowed in range [E0029]
range.rs:4 'a' ... 10 => (),
^~~~~~~
range.rs:4:9: 4:19 error: mismatched types:
expected `u32`,
found `char`
(expected u32,
found char) [E0308]
range.rs:4 'a' ... 10 => (),
^~~~~~~~~~
range.rs:5:9: 5:19 error: mismatched types in range:
expected char,
found integral variable [E0211]
range.rs:5 10 ... 'z' => (),
^~~~~~~~~~
range.rs:5:9: 5:15 error: only char and numeric types are allowed in range [E0029]
range.rs:5 10 ... 'z' => (),
^~~~~~
range.rs:6:9: 6:22 error: mismatched types in range:
expected integral variable,
found &-ptr [E0211]
range.rs:6 "what" ... 10 => (),
^~~~~~~~~~~~~
range.rs:6:9: 6:19 error: only char and numeric types are allowed in range [E0029]
range.rs:6 "what" ... 10 => (),
^~~~~~~~~~
range.rs:6:9: 6:22 error: mismatched types:
expected `u32`,
found `&'static str`
(expected u32,
found &-ptr) [E0308]
range.rs:6 "what" ... 10 => (),
^~~~~~~~~~~~~
range.rs:7:9: 7:19 error: only char and numeric types are allowed in range [E0029]
range.rs:7 "what" ... "well" => (),
^~~~~~~~~~
range.rs:7:9: 7:26 error: mismatched types:
expected `u32`,
found `&'static str`
(expected u32,
found &-ptr) [E0308]
range.rs:7 "what" ... "well" => (),
^~~~~~~~~~~~~~~~~
range.rs:8:9: 8:22 error: mismatched types in range:
expected &-ptr,
found integral variable [E0211]
range.rs:8 10 ... "what" => ()
^~~~~~~~~~~~~
range.rs:8:9: 8:15 error: only char and numeric types are allowed in range [E0029]
range.rs:8 10 ... "what" => ()
^~~~~~
error: aborting due to 12 previous errors
```
The problems here are:
1. The type of the end of the range is used to predict the type of the start (only mildly counter intuitive).
2. E0029 is erroneously generated for `char ... num` and `num ... char`.
2. `u32` is mentioned.
3. Errors which are essentially the same are reported multiple times.
I've attempted to fix this by checking the requirements in a different order. The output I've achieved for the above example is:
```
/home/michael/Temp/range.rs:4:17: 4:22 error: mismatched types in range:
expected char,
found integral variable [E0211]
/home/michael/Temp/range.rs:4 'a' ... 10 => (),
^~~~~
/home/michael/Temp/range.rs:5:16: 5:22 error: mismatched types in range:
expected integral variable,
found char [E0211]
/home/michael/Temp/range.rs:5 10 ... 'z' => (),
^~~~~~
/home/michael/Temp/range.rs:6:9: 6:19 error: only char and numeric types are allowed in range [E0029]
/home/michael/Temp/range.rs:6 "what" ... 10 => (),
^~~~~~~~~~
/home/michael/Temp/range.rs:6:9: 6:19 help: run `rustc --explain E0029` to see a detailed explanation
/home/michael/Temp/range.rs:6:9: 6:19 note: Start type: &'static str
End type: _
/home/michael/Temp/range.rs:6 "what" ... 10 => (),
^~~~~~~~~~
/home/michael/Temp/range.rs:7:9: 7:26 error: only char and numeric types are allowed in range [E0029]
/home/michael/Temp/range.rs:7 "what" ... "well" => (),
^~~~~~~~~~~~~~~~~
/home/michael/Temp/range.rs:7:9: 7:26 help: run `rustc --explain E0029` to see a detailed explanation
/home/michael/Temp/range.rs:7:9: 7:26 note: Start type: &'static str
End type: &'static str
/home/michael/Temp/range.rs:7 "what" ... "well" => (),
^~~~~~~~~~~~~~~~~
/home/michael/Temp/range.rs:8:16: 8:25 error: only char and numeric types are allowed in range [E0029]
/home/michael/Temp/range.rs:8 10 ... "what" => ()
^~~~~~~~~
/home/michael/Temp/range.rs:8:16: 8:25 help: run `rustc --explain E0029` to see a detailed explanation
/home/michael/Temp/range.rs:8:16: 8:25 note: Start type: _
End type: &'static str
/home/michael/Temp/range.rs:8 10 ... "what" => ()
^~~~~~~~~
error: aborting due to 5 previous errors
```
I think this is already tonnes better, but the `Start type/End type` stuff could be neater. I don't think there's really any need to start a `note:` block but I wanted to get some feedback on this. I'd also appreciate advice on how to print the integer types as something other than `_`.
Hack the move_val_init intrinsic to trans directly into the destination address.
This is to remove an intermediate (and unnecessary) alloca on the stack that one otherwise suffers when using this intrinsic.
This is part of the `box` protocol work; in particular, this is meant to address the `ptr::write` codegen issues alluded to at this comment:
https://github.com/rust-lang/rust/pull/22086#issuecomment-96168675
cc #22181
This was always a weird feature, and isn't being used in the compiler.
Static assertions should be done better than this.
This implements RFC #1096.
Fixes#13951Fixes#23008Fixes#6676
This is behind a feature gate, but that's still a
[breaking-change]
GDB and LLDB pretty printers have some common functionality
and also access some common information, such as the layout of
standard library types. So far, this information has been
duplicated in the two pretty printing python modules. This
commit introduces a common module used by both debuggers.
The E0397 explanation, as I've written it, isn't really an explanation, but I'm not sure what to put here. I will happily take suggestions.
Partially addresses https://github.com/rust-lang/rust/issues/25851
collections: Make BinaryHeap panic safe in sift_up / sift_down
Use a struct called Hole that keeps track of an invalid location
in the vector and fills the hole on drop.
I include a run-pass test that the current BinaryHeap fails, and the new
one passes.
NOTE: The BinaryHeap will still be inconsistent after a comparison fails. It will
not have the heap property. What we fix is just that elements will be valid
values.
This is actually a performance win -- the new code does not bother to write in `zeroed()`
values in the holes, it just leaves them as they were.
Net result is something like a 5% decrease in runtime for `BinaryHeap::from_vec`. This
can be further improved by using unchecked indexing (I confirmed it makes a difference,
not a surprise with the non-sequential access going on), but let's leave that for another PR.
Safety first 😉Fixes#25842
Use a struct called Hole that keeps track of an invalid location
in the vector and fills the hole on drop.
I include a run-pass test that the current BinaryHeap fails, and the new
one passes.
Fixes#25842
Windows tests can often deadlock if a child thread continues after the main
thread and then panics, and a `println!` executed in a child thread after the
main thread has exited is at risk of panicking.
Windows tests can often deadlock if a child thread continues after the main
thread and then panics, and a `println!` executed in a child thread after the
main thread has exited is at risk of panicking.
The current codegen tests only compare IR line counts between similar
rust and C programs, the latter getting compiled with clang. That looked
like a good idea back then, but actually things like lifetime intrinsics
mean that less IR isn't always better, so the metric isn't really
helpful.
Instead, we can start doing tests that check specific aspects of the
generated IR, like attributes or metadata. To do that, we can use LLVM's
FileCheck tool which has a number of useful features for such tests.
To start off, I created some tests for a few things that were recently
added and/or broken.
The current codegen tests only compare IR line counts between similar
rust and C programs, the latter getting compiled with clang. That looked
like a good idea back then, but actually things like lifetime intrinsics
mean that less IR isn't always better, so the metric isn't really
helpful.
Instead, we can start doing tests that check specific aspects of the
generated IR, like attributes or metadata. To do that, we can use LLVM's
FileCheck tool which has a number of useful features for such tests.
To start off, I created some tests for a few things that were recently
added and/or broken.
