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* bpo-46329: Streamline calling sequence a bit. (GH-31465)Mark Shannon2022-02-211-21/+34
| | | | | | | | | | | | | | * Move handling of bound-methods to PRECALL. * Remove call_shape.postcall_shrink * Remove call_shape.callable * Remove call_shape.callable. Change CALL oparg to match PRECALL oparg. * Move KW_NAMES before PRECALL. * Update opcode docs in dis.rst
* bpo-46329: Split calls into precall and call instructions. (GH-30855)Mark Shannon2022-01-281-30/+40
| | | | | | | | | | | | | | * Add PRECALL_FUNCTION opcode. * Move 'call shape' varaibles into struct. * Replace CALL_NO_KW and CALL_KW with KW_NAMES and CALL instructions. * Specialize for builtin methods taking using the METH_FASTCALL | METH_KEYWORDS protocol. * Allow kwnames for specialized calls to builtin types. * Specialize calls to tuple(arg) and str(arg).
* bpo-46528: Simplify the VM's stack manipulations (GH-30902)Brandt Bucher2022-01-261-45/+9
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* bpo-46422: use `dis.Positions` in `dis.Instruction` (GH-30716)Nikita Sobolev2022-01-241-0/+22
| | | Co-authored-by: Batuhan Taskaya <isidentical@gmail.com>
* bpo-43683: Streamline YIELD_VALUE and SEND (GH-30723)Mark Shannon2022-01-241-0/+16
| | | | | | | | * Split YIELD_VALUE into ASYNC_GEN_WRAP; YIELD_VALUE for async generators. * Split SEND into SEND; YIELD_VALUE. * Document new opcodes.
* bpo-46460: remove duplicated `versionchanged` from `dis.rst` (GH-30752)Nikita Sobolev2022-01-221-2/+0
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* bpo-46409: Make generators in bytecode (GH-30633)Mark Shannon2022-01-201-0/+15
| | | | | | | | | | | | * Add RETURN_GENERATOR and JUMP_NO_INTERRUPT opcodes. * Trim frame and generator by word each. * Minor refactor of frame.c * Update test.test_sys to account for smaller frames. * Treat generator functions as normal functions when evaluating and specializing.
* bpo-45923: Handle call events in bytecode (GH-30364)Mark Shannon2022-01-061-0/+14
| | | | * Add a RESUME instruction to handle "call" events.
* bpo-46031: add POP_JUMP_IF_NOT_NONE and POP_JUMP_IF_NONE (GH-30019)penguin_wwy2022-01-061-0/+14
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* bpo-46009: Remove GEN_START (GH-30367)Brandt Bucher2022-01-041-8/+0
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* bpo-46202: Remove opcode POP_EXCEPT_AND_RERAISE (GH-30302)Irit Katriel2022-01-041-10/+0
| | | | | | * bpo-46202: remove opcode POP_EXCEPT_AND_RERAISE * do not assume that an exception group is truthy
* bpo-46219, 46221: simplify except* implementation following exc_info ↵Irit Katriel2022-01-021-2/+2
| | | | changes. Move helpers to exceptions.c. Do not assume that exception groups are truthy. (GH-30289)
* bpo-45711: Remove type and traceback from exc_info (GH-30122)Irit Katriel2021-12-171-13/+21
| | | | | | | | * Do not PUSH/POP traceback or type to the stack as part of exc_info * Remove exc_traceback and exc_type from _PyErr_StackItem * Add to what's new, because this change breaks things like Cython
* bpo-44525: Split calls into PRECALL and CALL (GH-30011)Mark Shannon2021-12-141-32/+15
| | | | | | | | | | * Add 3 new opcodes for calls: PRECALL_METHOD, CALL_NO_KW, CALL_KW. * Update specialization to handle new CALL opcodes. * Specialize call to method descriptors. * Remove old CALL opcodes: CALL_FUNCTION, CALL_METHOD, CALL_METHOD_KW, CALL_FUNCTION_KW.
* bpo-45292: [PEP-654] add except* (GH-29581)Irit Katriel2021-12-141-0/+26
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* bpo-46009: Do not exhaust generator when send() method raises (GH-29986)Mark Shannon2021-12-081-3/+2
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* bpo-40222: update doc entry with respect to the change in WITH_EXCEPT_START ↵Irit Katriel2021-12-081-1/+3
| | | | (GH-29975)
* bpo-44525: Copy free variables in bytecode to allow calls to inner functions ↵Mark Shannon2021-11-231-0/+9
| | | | | | | | | | | to be specialized (GH-29595) * Make internal APIs that take PyFrameConstructor take a PyFunctionObject instead. * Add reference to function to frame, borrow references to builtins and globals. * Add COPY_FREE_VARS instruction to allow specialization of calls to inner functions.
* bpo-45711: Re-bump the magic number and update doc (GH-29528)Brandt Bucher2021-11-121-1/+4
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* bpo-45636: Merge all numeric operators (GH-29482)Brandt Bucher2021-11-111-134/+7
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* bpo-44511: Improve the bytecode for class and mapping patterns (GH-26922)Brandt Bucher2021-10-271-14/+20
| | | | | | | * Refactor mapping patterns and speed up class patterns. * Simplify MATCH_KEYS and MATCH_CLASS. * Add COPY opcode.
* [doc] Fix typos found using codespell (GH-28744)Christian Clauss2021-10-051-1/+1
| | | Co-authored-by: Łukasz Langa <lukasz@langa.pl>
* bpo-45168: change dis output to omit missing values rather than replacing ↵Irit Katriel2021-09-141-2/+3
| | | | them by their index (GH-28313)
* Add missing arg to DICT_MERGE opcode (GH-26859)andrei kulakov2021-06-271-1/+1
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* bpo-43977: Properly update the tp_flags of existing subclasses when their ↵Brandt Bucher2021-06-251-5/+8
| | | | parents are registered (GH-26864)
* bpo-43693: Un-revert commit f3fa63e. (#26609)Eric Snow2021-06-081-0/+8
| | | | | | | | | This was reverted in GH-26596 (commit 6d518bb) due to some bad memory accesses. * Add the MAKE_CELL opcode. (gh-26396) The memory accesses have been fixed. https://bugs.python.org/issue43693
* Revert "bpo-43693: Add the MAKE_CELL opcode and interleave fast locals ↵Pablo Galindo2021-06-081-8/+0
| | | | | offsets. (gh-26396)" (GH-26597) This reverts commit 631f9938b1604d4f893417ec339b9e0fa9196fb1.
* bpo-43693: Add the MAKE_CELL opcode and interleave fast locals offsets. ↵Eric Snow2021-06-071-0/+8
| | | | | | | (gh-26396) This moves logic out of the frame initialization code and into the compiler and eval loop. Doing so simplifies the runtime code and allows us to optimize it better. https://bugs.python.org/issue43693
* bpo-43693: Un-revert commits 2c1e258 and b2bf2bc. (gh-26577)Eric Snow2021-06-071-7/+23
| | | | | | | | | | These were reverted in gh-26530 (commit 17c4edc) due to refleaks. * 2c1e258 - Compute deref offsets in compiler (gh-25152) * b2bf2bc - Add new internal code objects fields: co_fastlocalnames and co_fastlocalkinds. (gh-26388) This change fixes the refleaks. https://bugs.python.org/issue43693
* bpo-43693: Revert commits 2c1e2583fdc4db6b43d163239ea42b0e8394171f and ↵Pablo Galindo2021-06-041-23/+7
| | | | | | | | | | | | | b2bf2bc1ece673d387341e06c8d3c2bc6e259747 (GH-26530) * Revert "bpo-43693: Compute deref offsets in compiler (gh-25152)" This reverts commit b2bf2bc1ece673d387341e06c8d3c2bc6e259747. * Revert "bpo-43693: Add new internal code objects fields: co_fastlocalnames and co_fastlocalkinds. (gh-26388)" This reverts commit 2c1e2583fdc4db6b43d163239ea42b0e8394171f. These two commits are breaking the refleak buildbots.
* bpo-43693: Compute deref offsets in compiler (gh-25152)Mark Shannon2021-06-041-6/+23
| | | | | | Merges locals and cells into a single array. Saves a pointer in the interpreter and means that we don't need the LOAD_CLOSURE opcode any more https://bugs.python.org/issue43693
* bpo-43693: Add new internal code objects fields: co_fastlocalnames and ↵Eric Snow2021-06-031-3/+2
| | | | | | | | | | | | | | | | | co_fastlocalkinds. (gh-26388) A number of places in the code base (notably ceval.c and frameobject.c) rely on mapping variable names to indices in the frame "locals plus" array (AKA fast locals), and thus opargs. Currently the compiler indirectly encodes that information on the code object as the tuples co_varnames, co_cellvars, and co_freevars. At runtime the dependent code must calculate the proper mapping from those, which isn't ideal and impacts performance-sensitive sections. This is something we can easily address in the compiler instead. This change addresses the situation by replacing internal use of co_varnames, etc. with a single combined tuple of names in locals-plus order, along with a minimal array mapping each to its kind (local vs. cell vs. free). These two new PyCodeObject fields, co_fastlocalnames and co_fastllocalkinds, are not exposed to Python code for now, but co_varnames, etc. are still available with the same values as before (though computed lazily). Aside from the (mild) performance impact, there are a number of other benefits: * there's now a clear, direct relationship between locals-plus and variables * code that relies on the locals-plus-to-name mapping is simpler * marshaled code objects are smaller and serialize/de-serialize faster Also note that we can take this approach further by expanding the possible values in co_fastlocalkinds to include specific argument types (e.g. positional-only, kwargs). Doing so would allow further speed-ups in _PyEval_MakeFrameVector(), which is where args get unpacked into the locals-plus array. It would also allow us to shrink marshaled code objects even further. https://bugs.python.org/issue43693
* bpo-26110: Document `CALL_METHOD_KW` (GH-26159)Ken Jin2021-05-191-0/+12
| | | Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
* bpo-40222: "Zero cost" exception handling (GH-25729)Mark Shannon2021-05-071-31/+27
| | | | | | | | "Zero cost" exception handling. * Uses a lookup table to determine how to handle exceptions. * Removes SETUP_FINALLY and POP_TOP block instructions, eliminating (most of) the runtime overhead of try statements. * Reduces the size of the frame object by about 60%.
* bpo-43754: Eliminate bindings for partial pattern matches (GH-25229)Brandt Bucher2021-05-021-0/+9
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* bpo-43683: Handle generator entry in bytecode (GH-25138)Mark Shannon2021-04-061-0/+8
| | | | | | * Handle check for sending None to starting generator and coroutine into bytecode. * Document new bytecode and make it fail gracefully if mis-compiled.
* bpo-42128: Structural Pattern Matching (PEP 634) (GH-22917)Brandt Bucher2021-02-261-0/+56
| | | | | Co-authored-by: Guido van Rossum <guido@python.org> Co-authored-by: Talin <viridia@gmail.com> Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
* Fix typo in dis module doc (GH-24509)Irit Katriel2021-02-201-1/+1
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* bpo-33387: update documentation for exception handling opcode changes (GH-24334)Irit Katriel2021-01-261-1/+1
| | | | | * bpo-33387: remove obsolete comment * bpo-33387: update SETUP_WITH opcode documentation
* bpo-42246: Make sure that `f_lasti`, and thus `f_lineno`, is set correctly ↵Mark Shannon2020-12-171-1/+2
| | | | | | | | | after raising or reraising an exception (GH-23803) * Ensure that f_lasti is set correctly after an exception is raised to conform to PEP 626. * Update importlib * Add NEWS.
* Fix dis markup (GH-23524)Andre Delfino2020-11-281-6/+6
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* bpo-42202: Store func annotations as a tuple (GH-23316)Yurii Karabas2020-11-251-1/+3
| | | | | | | | | | | | | Reduce memory footprint and improve performance of loading modules having many func annotations. >>> sys.getsizeof({"a":"int","b":"int","return":"int"}) 232 >>> sys.getsizeof(("a","int","b","int","return","int")) 88 The tuple is converted into dict on the fly when `func.__annotations__` is accessed first. Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Inada Naoki <songofacandy@gmail.com>
* Fix `List_Append` description, list is extracted at TOS1[-i] (GH-21465)Xiang Zhang2020-07-281-1/+1
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* Improved documentation for `BUILD_CONST_KEY_MAP` (GH-19454)laike9m2020-04-131-3/+3
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* bpo-40122: Updated documentation for dis.findlabels() (GH-19274)laike9m2020-04-031-1/+1
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* Updated documentation for FOR_ITER (GH-19113)laike9m2020-03-241-1/+1
| | | Added a comma to make the sentence less confusing.
* bpo-39677: dis: rename the operand of MAKE_FUNCTION from `argc` to `flags` ↵Taine Zhao2020-03-141-1/+1
| | | | for 3.6+ (GC-18550)
* bpo-39320: Handle unpacking of **values in compiler (GH-18141)Mark Shannon2020-01-271-14/+7
| | | | | | | | | | | | | * Add DICT_UPDATE and DICT_MERGE bytecodes. Use them for ** unpacking. * Remove BUILD_MAP_UNPACK and BUILD_MAP_UNPACK_WITH_CALL, as they are now unused. * Update magic number for ** unpacking opcodes. * Update dis.rst to incorporate new bytecodes. * Add blurb entry.
* bpo-39320: Handle unpacking of *values in compiler (GH-17984)Mark Shannon2020-01-231-28/+9
| | | | | | | | * Add three new bytecodes: LIST_TO_TUPLE, LIST_EXTEND, SET_UPDATE. Use them to implement star unpacking expressions. * Remove four bytecodes BUILD_LIST_UNPACK, BUILD_TUPLE_UNPACK, BUILD_SET_UNPACK and BUILD_TUPLE_UNPACK_WITH_CALL opcodes as they are now unused. * Update magic number and dis.rst for new bytecodes.
* improve the documentation of the LOAD_METHOD and CALL_METHOD (GH-18079)Carl Friedrich Bolz-Tereick2020-01-211-8/+10
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