implement Ord for OutlivesPredicate and other types
It became necessary while implementing https://github.com/rust-lang/rust/pull/50070 to have `Ord` implemented for `OutlivesPredicate`.
This PR implements `Ord` for `OutlivesPredicate` as well as other types needed for the implementation.
rustdoc: hide macro export statements from docs
As mentioned in https://github.com/rust-lang/rust/issues/50647, rustdoc now prints both the import statement and the macro itself when re-exporting macros. This is a stopgap solution to clean up the std docs and get something small backported into beta.
What this does: When rustdoc finds an export statement for a macro, instead of printing the export and bailing, now it will instead hide the export and bail. Until we can solve https://github.com/rust-lang/rust/issues/34843 or have a better way to find the attributes on an export statement when inlining macros, this will at least match the current behavior and clean up the re-export statements from the docs.
Shrink `LiveNode`.
`Liveness::users` is a vector that is occasionally enormous. For
example, doing a "clean incremental" check build of `inflate`, there is
one instance that represents 5,499 live nodes and 1087 vars, which
requires 5,977,413 entries. At 24 bytes per entry, that is 143MB.
This patch changes LiveNode from a usize to a u32. On 64-bit machines
that halves the size of these entries, significantly reducing peak
memory usage and memory traffic, and speeding up "clean incremental"
builds of `inflate` by about 10%.
Fix span for type-only arguments
Currently it points to the comma or parenthesis before the type, which is broken
cc @mark-i-m this is what broke #48309
r? @estebank
Add -Z no-parallel-llvm flag
Codegen issues commonly only manifest under specific circumstances,
e.g. if multiple codegen units are used and ThinLTO is enabled.
However, these configuration are threaded, making the use of LLVM
debugging facilities hard, as output is interleaved.
This patch adds a -Z no-parallel-llvm flag, which allows disabling
parallelization of codegen and linking, while otherwise preserving
behavior with regard to codegen units and LTO.
Make sure that queries have predictable symbol names.
Some recent refactorings led to query names not showing up in the corresponding symbol names. [perf-focus](https://github.com/nikomatsakis/perf-focus) and manual profiling have been broken by this. This PR makes sure that query providers always get their own symbol and that that symbol has a predictable name.
Since this adds `#[inline(never)]` to a function that wraps the provider call, let's check if this does not regress performance before merging.
r? @nikomatsakis
rust-gdb: work around the re-used -d argument in cgdb
Use --directory= to pass $GDB_PYTHON_MODULE_DIRECTORY instead of -d, because [cgdb](https://github.com/cgdb/cgdb) reuses '-d' to select a debugger, whereas the long option works with both gdb and cgdb.
