These commits remove a bunch of empty or otherwise unnecessary blocks, reducing the size of the pre-optimization IR and improving its readability. `librustc.ll` created with `--passes ""` shrinks by about 120k lines which equals about 5% of the total size.
Rust will allow to supply default methods for all four methods, but we
don't have any nice error reporting for the case where at least one
method must be implemented, but it's arbitrary which.
So in this case, we require `lt`, but allow implementing the others if needed.
Currently, we always create a dedicated "return" basic block, but when
there's only a single predecessor for that block, it can be merged with
that predecessor. We can achieve that merge by only creating the return
block on demand, avoiding its creation when its not required.
Reduces the pre-optimization size of librustc.ll created with --passes ""
by about 90k lines which equals about 4%.
It will be simpler to implement only one method for Ord, while we also
allow implementing all four Ord methods for semantics or performance
reasons.
We only supply three default methods (and not four), because don't have
any nice error reporting for the case where at least one method must be
implemented, but it's arbitrary which.
Unify the mutable iterators too. Switch the ListInsertion trait to use
method .insert_next() and .peek_next() for list mutation. .insert_next()
inserts an element into the list that will not appear in iteration, of
course; so the length of the iteration can not change during iteration.
Did not properly allow runs from the `other` list to be merged in. The
test case was using a wrong expected value.
Edited docs for merge so they explain more clearly what it does.
Also make sure insert_ordered is marked pub.
When it's a lifetime, a single quotation mark shouldn't have a matching
single quotation mark inserted after it, as delimitMate does by default.
Note that this is not without problems; a char literal coming after an
odd number of lifetime markers will have its quotation marks behave a
little strangely. That, however, is not my fault, but delimitMate's:
https://github.com/Raimondi/delimitMate/issues/135
Currently, immediate values are copied into an alloca only to have an
addressable storage so that it can be used with memcpy. Obviously we
can skip the memcpy in this case.
Moves multibyte code to it's own function to make char_range_at
easier to inline, and faster for single and multibyte chars.
Benchmarked reading example.json 100 times, 1.18s before, 1.08s
after.
Also, optimize str::is_utf8 for the single and multibyte case
Before:
is_utf8_ascii: 272.355162 ms
is_utf8_multibyte: 167.337334 ms
After:
is_utf8_ascii: 218.088049 ms
is_utf8_multibyte: 134.836722 ms
This changes it from
```
left: true does not equal right: false
```
to
```
assertion failed: `(left == right) && (right == left)` (left: `true`, right: `false`)
```
When it's a lifetime, a single quotation mark shouldn't have a matching
single quotation mark inserted after it, as delimitMate does by default.
Note that this is not without problems; a char literal coming after an
odd number of lifetime markers will have its quotation marks behave a
little strangely. That, however, is not my fault, but delimitMate's:
https://github.com/Raimondi/delimitMate/issues/135
cc #6004 and #3273
This is a rewrite of TLS to get towards not requiring `@` when using task local storage. Most of the rewrite is straightforward, although there are two caveats:
1. Changing `local_set` to not require `@` is blocked on #7673
2. The code in `local_pop` is some of the most unsafe code I've written. A second set of eyes should definitely scrutinize it...
The public-facing interface currently hasn't changed, although it will have to change because `local_data::get` cannot return `Option<T>`, nor can it return `Option<&T>` (the lifetime isn't known). This will have to be changed to be given a closure which yield `&T` (or as an Option). I didn't do this part of the api rewrite in this pull request as I figured that it could wait until when `@` is fully removed.
This also doesn't deal with the issue of using something other than functions as keys, but I'm looking into using static slices (as mentioned in the issues).
This patch is a step towards #6298. It extracts the graph abstraction from region inference into a library, and then ports the region inference to use it. It also adds a control-flow graph abstraction that will eventually be used by dataflow. The CFG code is not yet used, but I figured better to add it so as to make later rebasing etc easier.
