Commit Graph

29 Commits

Author SHA1 Message Date
Ken Jin 22b0de2755
gh-117139: Convert the evaluation stack to stack refs (#118450)
This PR sets up tagged pointers for CPython.

The general idea is to create a separate struct _PyStackRef for everything on the evaluation stack to store the bits. This forces the C compiler to warn us if we try to cast things or pull things out of the struct directly.

Only for free threading: We tag the low bit if something is deferred - that means we skip incref and decref operations on it. This behavior may change in the future if Mark's plans to defer all objects in the interpreter loop pans out.

This implies a strict stack reference discipline is required. ALL incref and decref operations on stackrefs must use the stackref variants. It is unsafe to untag something then do normal incref/decref ops on it.

The new incref and decref variants are called dup and close. They mimic a "handle" API operating on these stackrefs.

Please read Include/internal/pycore_stackref.h for more information!

---------

Co-authored-by: Mark Shannon <9448417+markshannon@users.noreply.github.com>
2024-06-27 03:10:43 +08:00
Mark Shannon 8f5a01707f
GH-120982: Add stack check assertions to generated interpreter code (GH-120992) 2024-06-25 16:42:29 +01:00
Irit Katriel c1e9647107
gh-119689: generate stack effect metadata for pseudo instructions (#119691) 2024-05-29 09:47:56 +00:00
Mark Shannon f5c6b9977a
GH-118910: Less boilerplate in the tier 2 optimizer (#118913) 2024-05-10 17:43:23 +01:00
Ken Jin 617aca9e74
gh-115419: Change default sym to not_null (GH-116562) 2024-03-13 20:57:48 +08:00
Brett Simmers 339c8e1c13
gh-115999: Disable the specializing adaptive interpreter in free-threaded builds (#116013)
For now, disable all specialization when the GIL might be disabled.
2024-02-29 21:53:32 -05:00
Guido van Rossum 86e5e063ab
gh-115816: Generate calls to sym_new_const() etc. without _Py_uop prefix (#116077)
This was left behind by GH-115987. Basically a lot of diffs like this:
```
-            res = _Py_uop_sym_new_unknown(ctx);
+            res = sym_new_unknown(ctx);
```
2024-02-29 00:05:53 +00:00
Mark Shannon 6ecfcfe894
GH-115816: Assorted naming and formatting changes to improve maintainability. (GH-115987)
* Rename _Py_UOpsAbstractInterpContext to _Py_UOpsContext and _Py_UOpsSymType to _Py_UopsSymbol.

* #define shortened form of _Py_uop_... names for improved readability.
2024-02-27 13:25:02 +00:00
Mark Shannon 10fbcd6c5d
GH-115816: Make tier2 optimizer symbols testable, and add a few tests. (GH-115953) 2024-02-27 10:51:26 +00:00
Guido van Rossum c0fdfba7ff
Rename tier 2 redundancy eliminator to optimizer (#115888)
The original name is just too much of a mouthful.
2024-02-26 08:42:53 -08:00
Mark Shannon 7b21403ccd
GH-112354: Initial implementation of warm up on exits and trace-stitching (GH-114142) 2024-02-20 09:39:55 +00:00
Ken Jin 7cce857622
gh-114058: Foundations of the Tier2 redundancy eliminator (GH-115085)
---------

Co-authored-by: Mark Shannon <9448417+markshannon@users.noreply.github.com>
Co-authored-by: Jules <57632293+JuliaPoo@users.noreply.github.com>
Co-authored-by: Guido van Rossum <gvanrossum@users.noreply.github.com>
2024-02-13 21:24:48 +08:00
Ken Jin ac92527c08
gh-113710: Add types to the interpreter DSL (#113711)
Co-authored-by: Jules <57632293+JuliaPoo@users.noreply.github.com>
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
2024-01-13 01:30:27 +08:00
Mark Shannon 723f4d6698
GH-111485: Delete the old generator code. (GH-113321) 2023-12-21 12:46:28 +00:00
Mark Shannon 70d378cdaa
GH-111485: Break up instructions with unused cache entries into component micro-ops (GH-113169) 2023-12-18 13:16:45 +00:00
Mark Shannon 771903596b
GH-111485: Test the new cases generator (GH-113252) 2023-12-18 11:14:40 +00:00
Irit Katriel 07ebd46f9e
gh-112519: Make it possible to specify instruction flags for pseudo instructions in bytecodes.c (#112520) 2023-11-30 11:03:30 +00:00
Mark Shannon 1619f4350e
GH-111485: Sort cases in the case generator output (GH-112315) 2023-11-22 15:19:50 +00:00
Mark Shannon 931f4438c9
GH-111485: Allow arbitrary annotations on instructions and micro-ops. (GH-111697) 2023-11-07 09:42:39 +00:00
Guido van Rossum 7e135a48d6
gh-111520: Integrate the Tier 2 interpreter in the Tier 1 interpreter (#111428)
- There is no longer a separate Python/executor.c file.
- Conventions in Python/bytecodes.c are slightly different -- don't use `goto error`,
  you must use `GOTO_ERROR(error)` (same for others like `unused_local_error`).
- The `TIER_ONE` and `TIER_TWO` symbols are only valid in the generated (.c.h) files.
- In Lib/test/support/__init__.py, `Py_C_RECURSION_LIMIT` is imported from `_testcapi`.
- On Windows, in debug mode, stack allocation grows from 8MiB to 12MiB.
- **Beware!** This changes the env vars to enable uops and their debugging
  to `PYTHON_UOPS` and `PYTHON_LLTRACE`.
2023-11-01 13:13:02 -07:00
Mark Shannon d27acd4461
GH-111485: Increment `next_instr` consistently at the start of the instruction. (GH-111486) 2023-10-31 10:09:54 +00:00
Carl Meyer 3c0f65ebce
gh-109287: fix overrides in cases generator (#110419) 2023-10-05 15:05:29 -07:00
Guido van Rossum d67edcf0b3
gh-109979: Auto-generate the target for DEOPT_IF() (#110193)
In Python/bytecodes.c, you now write
```
    DEOPT_IF(condition);
```
The code generator expands this to
```
    DEOPT_IF(condition, opcode);
```
where `opcode` is the name of the unspecialized instruction.
This works inside macro expansions too.

**CAVEAT:** The entire `DEOPT_IF(condition)` statement must be on a single line.
If it isn't, the substitution will fail; an error will be printed by the code generator
and the C compiler will report some errors.
2023-10-03 10:13:50 -07:00
Victor Stinner 9363769161
gh-109295: Skip test_generated_cases if different mount drives (#109308)
On Windows, skip the test if the current working directory and the
Python source code directory have different mount drives. It happens
if the temporary directory is on a different mount drive than the
Python source code.
2023-09-12 04:30:07 +02:00
Serhiy Storchaka f9f085c326
gh-103186: Make test_generated_cases less noisy by default (GH-109100)
Print additional details only when tests are run with -vv.
2023-09-07 20:53:38 +03:00
Guido van Rossum b87263be9b
gh-106581: Support multiple uops pushing new values (#108895)
Also avoid the need for the awkward .clone() call in the argument
to mgr.adjust_inverse() and mgr.adjust().
2023-09-05 13:58:39 -07:00
Guido van Rossum 400835ea16
gh-106812: Refactor cases_generator to allow uops with array stack effects (#107564)
Introducing a new file, stacking.py, that takes over several responsibilities related to symbolic evaluation of push/pop operations, with more generality.
2023-08-04 09:35:56 -07:00
Guido van Rossum 032f480909
Thoroughly refactor the cases generator (#107151)
This mostly extracts a whole bunch of stuff out of generate_cases.py into separate files, but there are a few other things going on here.

- analysis.py: `Analyzer` etc.
- instructions.py: `Instruction` etc.
- flags.py: `InstructionFlags`, `variable_used`, `variable_used_unspecialized`
- formatting.py: `Formatter` etc.
- Rename parser.py to parsing.py, to avoid conflict with stdlib parser.py
- Blackify most things
- Fix most mypy errors
- Remove output filenames from Generator state, add them to `write_instructions()` etc.
- Fix unit tests
2023-07-24 09:38:23 -07:00
Nikita Sobolev c41320701b
gh-105540: Convert `pytest` tests of `cases_generator` to regular tests (#106713) 2023-07-16 16:05:24 -07:00