This makes the Tier 2 interpreter a little faster.
I calculated by about 3%,
though I hesitate to claim an exact number.

This starts by doubling the trace size limit (to 512),
making it more likely that loops fit in a trace.

The rest of the approach is to only load
`oparg` and `operand` in cases that use them.
The code generator know when these are used.

For `oparg`, it will conditionally emit
```
oparg = CURRENT_OPARG();
```
at the top of the case block.
(The `oparg` variable may be referenced multiple times
by the instructions code block, so it must be in a variable.)

For `operand`, it will use `CURRENT_OPERAND()` directly
instead of referencing the `operand` variable,
which no longer exists.
(There is only one place where this will be used.)

Also avoid compiler warnings about unused 'reserved' variable.

This uses the new mechanism whereby certain uops
are replaced by others during translation,
using the `_PyUop_Replacements` table.
We further special-case the `_FOR_ITER_TIER_TWO` uop
to update the deoptimization target to point
just past the corresponding `END_FOR` opcode.

Two tiny code cleanups are also part of this PR.

)

Rename Py_NOGIL to Py_GIL_DISABLED

…ments (#29513)

)

…3324)

Omit the `@interface_scope` from an IPv6 address when used as Host header by `http.client`.

---------

Co-authored-by: Gregory P. Smith <greg@krypto.org> [Google LLC]

…_` docstrings (#112268)

…e. (gh-112116)

…n unhandled exception (#111574)

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>

Missing "requires('gui')" causes Tk() to fail when no gui.
This caused CI Hypothesis test to fail, but I did not understand
the its error message. Then buildbots failed.

IdbTest failed on draft Bdb replacement because so different.
Simplified version works on old and new.

Add docstrings to the debugger module. Fix two bugs: initialize Idb.botframe (should be in Bdb); In Idb.in_rpc_code, check whether prev_frame is None before trying to use it. Make other code changes.

Expand test_debugger coverage from 19% to 66%.
---------
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

…112187)

…h-112251)

…gh-112193)

…h-112232)


Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

…112242)

Add `PurePathTest` as a superclass of `PathTest`, and therefore also
`PathSubclassTest`. This adds coverage of pure functionality in user
subclasses of `pathlib.Path`.

Remove `PosixPathAsPureTest` and `WindowsPathAsPureTest`, as they
now duplicate `PosixPathTest` and `WindowsPathTest`.

This makes the MROs of test unit classes match the MROs of pathlib
classes.

…`group()` (#112239)

Move test methods from `WindowsPathAsPureTest` to `WindowsPathTest` unit.
The former test unit is intended to exercise only pure path functionality.

It is and always was 0.

…h-112189)

- Ensure that `assert(type_version != 0);` always comes *before* using `type_version`

Also:
- In cases_generator, rename `-v` to from `--verbose` to `--viable`

Co-authored-by: Brett Cannon <brett@python.org>

…n()` conditional on compiler optimizations (GH-112223)

Co-authored-by: Victor Stinner <vstinner@python.org>

Fix minor typo in importlib doc

…12171)

- Show uop name in Error/DEOPT messages
- Add target to some messages
- Expose uop_name() as _PyUopName()

- Double max trace size to 256
- Add a dependency on executor_cases.c.h for ceval.o
- Mark `_SPECIALIZE_UNPACK_SEQUENCE` as `TIER_ONE_ONLY`
- Add debug output back showing the optimized trace
- Bunch of cleanups to Tools/cases_generator/

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

- Add fast path to `_split_stack()`
- Skip unnecessarily resolution of the current directory when a relative
  path is given to `resolve()`
- Remove stat and target caches, which slow down most `resolve()` calls in
  practice.
- Slightly refactor code for clarity.