Commit Graph

152 Commits

Author SHA1 Message Date
Mark Shannon ac10947ba7
GH-112354: `_GUARD_IS_TRUE_POP` side-exits to target the next instruction, not themselves. (GH-114078) 2024-01-15 11:41:06 +00:00
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
Guido van Rossum 713e42822f
GH-111485: Fix DEFAULT_OUTPUT in opcode_metadata_generator.py (#113324) 2023-12-20 10:05:48 -08:00
Mark Shannon de8a4e52a5
GH-111485: Generate `TARGET` table for computed goto dispatch. (GH-113319) 2023-12-20 15:09:12 +00:00
Mark Shannon e96f26083b
GH-111485: Generate instruction and uop metadata (GH-113287) 2023-12-20 14:27:25 +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
Mark Shannon e24eccbc1c
GH-111485: Sort metadata tables for easier checking of future diffs (GH-113101) 2023-12-14 16:41:52 +00:00
Mark Shannon 9263173280
Fix whitespace in generated code 2023-12-13 12:31:41 +00:00
Mark Shannon 0c55f27060
GH-111485: Factor out tier 2 code generation from the rest of the interpreter code generator (GH-112968) 2023-12-12 12:12:17 +00:00
Mark Shannon c27e9d5d17
GH-111485: Factor out generation of uop IDs from cases generator. (GH-112877) 2023-12-11 14:14:36 +00:00
Mark Shannon aefdebdef1
GH-111485: Factor out opcode ID generator from the main cases generator. (GH-112831) 2023-12-08 11:48:30 +00:00
Mark Shannon b449415b2f
GH-111485: Separate out parsing, analysis and code-gen phases of tier 1 code generator (GH-112299) 2023-12-07 12:49:40 +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
Guido van Rossum 8deb8bc2e5
gh-112287: Speed up Tier 2 (uop) interpreter a little (#112286)
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.)
2023-11-20 11:25:32 -08:00
Guido van Rossum eb3c94ea66
gh-110319: Assert type_version != 0 before using it (#112226)
- Ensure that `assert(type_version != 0);` always comes *before* using `type_version`

Also:
- In cases_generator, rename `-v` to from `--verbose` to `--viable`
2023-11-17 20:58:13 -08:00
Guido van Rossum da314f7c8d
A few more cases_generator cleanups (#112220) 2023-11-17 22:36:37 +00:00
Guido van Rossum be0bd54c6b
gh-106529: Cleanups split off gh-112134 (#112214)
- 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/
2023-11-17 11:49:42 -08:00
Mark Shannon 4bbb367ba6
GH-111848: Set the IP when de-optimizing (GH-112065)
* Replace jumps with deopts in tier 2

* Fewer special cases of uop names

* Add target field to uop IR

* Remove more redundant SET_IP and _CHECK_VALIDITY micro-ops

* Extend whitelist of non-escaping API functions.
2023-11-15 15:48:58 +00:00
Brandt Bucher 31ad7e061e
GH-111520: Add back the operand local (GH-111813) 2023-11-13 17:27:19 -08:00
Mark Shannon 25c4956488
GH-109369: Exit tier 2 if executor is invalid (GH-111657) 2023-11-09 11:19:51 +00:00
Mark Shannon 06efb60264
GH-111848: Tidy up tier 2 handling of FOR_ITER specialization by using DEOPT_IF instead of jumps. (GH-111849) 2023-11-08 13:31:55 +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 b14e882428
GH-111485: Use micro-ops to split specialization code from base action (GH-111561) 2023-11-01 10:53:27 +00:00
Mark Shannon 2904d99839
GH-111485: Remove some special cases from the code generator and bytecodes.c (GH-111540) 2023-10-31 13:21:07 +00:00
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
Irit Katriel 67a91f78e4
gh-109094: replace frame->prev_instr by frame->instr_ptr (#109095) 2023-10-26 13:43:10 +00:00
Mark Shannon 19b7ead5eb
GH-109214: Convert _SAVE_CURRENT_IP to _SET_IP in tier 2 trace creation. (GH-110755) 2023-10-12 10:34:32 +01:00
Carl Meyer 3c0f65ebce
gh-109287: fix overrides in cases generator (#110419) 2023-10-05 15:05:29 -07:00
Guido van Rossum 7c149a76b2
gh-104909: Split more LOAD_ATTR specializations (GH-110317)
* Split LOAD_ATTR_MODULE

* Split LOAD_ATTR_WITH_HINT

* Split _GUARD_TYPE_VERSION out of the latter

* Split LOAD_ATTR_CLASS

* Split LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES

* Fix indent of DEOPT_IF in macros

* Split LOAD_ATTR_METHOD_LAZY_DICT

* Split LOAD_ATTR_NONDESCRIPTOR_NO_DICT

* Fix omission of _CHECK_ATTR_METHOD_LAZY_DICT
2023-10-04 16:08:02 +01:00
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
Guido van Rossum 5bb6f0fcba
gh-104909: Split some more insts into ops (#109943)
These are the most popular specializations of `LOAD_ATTR` and `STORE_ATTR`
that weren't already viable uops:

* Split LOAD_ATTR_METHOD_WITH_VALUES
* Split LOAD_ATTR_METHOD_NO_DICT
* Split LOAD_ATTR_SLOT
* Split STORE_ATTR_SLOT
* Split STORE_ATTR_INSTANCE_VALUE

Also:

* Add `-v` flag to code generator which prints a list of non-viable uops
  (easter-egg: it can print execution counts -- see source)
* Double _Py_UOP_MAX_TRACE_LENGTH to 128



I had dropped one of the DEOPT_IF() calls! :-(
2023-09-27 15:27:44 -07:00
Heinz-Alexander Fuetterer ef6d475db3
Fix typos in docs and comments (#109619) 2023-09-20 16:58:23 +00:00
Guido van Rossum a7a079798d
gh-109287: Desugar inst(X) to op(X); macro(X) = X (#109294)
This makes the internal representation in the code generator simpler: there's a list of ops, and a list of macros, and there's no special-casing needed for ops that aren't macros. (There's now special-casing for ops that are also macros, but that's simpler.)
2023-09-15 08:39:05 -07:00
Guido van Rossum b86ce91bfe
gh-106581: Honor 'always_exits' in write_components() (#109338)
I must have overlooked this when refactoring the code generator.
The Tier 1 interpreter contained a few silly things like
```
            goto resume_frame;
            STACK_SHRINK(1);
```
(and other variations, some where the unconditional `goto` was hidden in a macro).
2023-09-12 17:58:40 +00:00
Irit Katriel 8b55adfa8f
gh-109256: allocate opcode IDs for internal opcodes in their own range (#109269) 2023-09-12 10:36:17 +00:00
Guido van Rossum fbaf77eb9b
gh-109214: Rename SAVE_IP to _SET_IP, and similar (#109285)
* Rename SAVE_IP to _SET_IP
* Rename EXIT_TRACE to _EXIT_TRACE
* Rename SAVE_CURRENT_IP to _SAVE_CURRENT_IP
* Rename INSERT to _INSERT (This is for Ken Jin's abstract interpreter)
* Rename IS_NONE to _IS_NONE
* Rename JUMP_TO_TOP to _JUMP_TO_TOP
2023-09-11 15:39:19 -07:00
Guido van Rossum bcce5e2718
gh-109039: Branch prediction for Tier 2 interpreter (#109038)
This adds a 16-bit inline cache entry to the conditional branch instructions POP_JUMP_IF_{FALSE,TRUE,NONE,NOT_NONE} and their instrumented variants, which is used to keep track of the branch direction.

Each time we encounter these instructions we shift the cache entry left by one and set the bottom bit to whether we jumped.

Then when it's time to translate such a branch to Tier 2 uops, we use the bit count from the cache entry to decided whether to continue translating the "didn't jump" branch or the "jumped" branch.

The counter is initialized to a pattern of alternating ones and zeros to avoid bias.

The .pyc file magic number is updated. There's a new test, some fixes for existing tests, and a few miscellaneous cleanups.
2023-09-11 18:20:24 +00:00
Mark Shannon 0858328ca2
GH-108614: Add `RESUME_CHECK` instruction (GH-108630) 2023-09-07 14:39:03 +01:00
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
Mark Shannon 059bd4d299
GH-108614: Remove non-debug uses of `#if TIER_ONE` and `#if TIER_TWO` from `_POP_FRAME` op. (GH-108685) 2023-08-31 11:34:52 +01:00
Guido van Rossum 4f22152713
gh-107557: Remove unnecessary SAVE_IP instructions (#108583)
Also remove NOP instructions.

The "stubs" are not optimized in this fashion (their SAVE_IP should always be preserved since it's where to jump next, and they don't contain NOPs by their nature).
2023-08-29 16:51:51 +00:00
Irit Katriel 5f41376e93
gh-107901: add the HAS_EVAL_BREAK instruction flag (#108375) 2023-08-25 18:33:59 +00:00
Alex Waygood 5a25daa512
gh-104504: Cases generator: enable mypy's `possibly-undefined` error code (#108454) 2023-08-25 18:08:29 +01:00
Guido van Rossum ddf66b54ed
gh-106581: Split CALL_BOUND_METHOD_EXACT_ARGS into uops (#108462)
Instead of using `GO_TO_INSTRUCTION(CALL_PY_EXACT_ARGS)` we just add the macro elements of the latter to the macro for the former. This requires lengthening the uops array in struct opcode_macro_expansion. (It also required changes to stacking.py that were merged already.)
2023-08-24 17:36:00 -07:00
Guido van Rossum 88941d665f
gh-106581: Fix two bugs in the code generator's copy optimization (#108380)
I was comparing the last preceding poke with the *last* peek,
rather than the *first* peek.

Unfortunately this bug obscured another bug:
When the last preceding poke is UNUSED, the first peek disappears,
leaving the variable unassigned. This is how I fixed it:

- Rename CopyEffect to CopyItem.
- Change CopyItem to contain StackItems instead of StackEffects.
- Update those StackItems when adjusting the manager higher or lower.
- Assert that those StackItems' offsets are equivalent.
- Other clever things.

---------

Co-authored-by: Irit Katriel <1055913+iritkatriel@users.noreply.github.com>
2023-08-24 19:10:51 +00:00
Irit Katriel 72119d16a5
gh-105481: remove regen-opcode. Generated _PyOpcode_Caches in regen-cases. (#108367) 2023-08-23 18:39:00 +01:00