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* bpo-39320: Handle unpacking of **values in compiler (GH-18141)Mark Shannon2020-01-271-4/+4
| | | | | | | | | | | | | * 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 Shannon2020-01-231-7/+7
| | | | | | | | * 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.
* bpo-39156: Break up COMPARE_OP into four logically distinct opcodes. (GH-17754)Mark Shannon2020-01-141-3/+3
| | | | | | | | Break up COMPARE_OP into four logically distinct opcodes: * COMPARE_OP for rich comparisons * IS_OP for 'is' and 'is not' tests * CONTAINS_OP for 'in' and 'is not' tests * JUMP_IF_NOT_EXC_MATCH for checking exceptions in 'try-except' statements.
* Produce cleaner bytecode for 'with' and 'async with' by generating separate ↵Mark Shannon2019-11-211-8/+8
| | | | | | code for normal and exceptional paths. (#6641) Remove BEGIN_FINALLY, END_FINALLY, CALL_FINALLY and POP_FINALLY bytecodes. Implement finally blocks by code duplication. Reimplement frame.lineno setter using line numbers rather than bytecode offsets.
* bpo-34880: Add the LOAD_ASSERTION_ERROR opcode. (GH-15073)Zackery Spytz2019-08-251-1/+1
| | | | Fix assert statement misbehavior if AssertionError is shadowed.
* bpo-33041: Rework compiling an "async for" loop. (#6142)Serhiy Storchaka2018-03-231-1/+1
| | | | | | | | * Added new opcode END_ASYNC_FOR. * Setting global StopAsyncIteration no longer breaks "async for" loops. * Jumping into an "async for" loop is now disabled. * Jumping out of an "async for" loop no longer corrupts the stack. * Simplify the compiler.
* bpo-17611. Move unwinding of stack for "pseudo exceptions" from interpreter ↵Serhiy Storchaka2018-02-221-8/+8
| | | | | | | | | to compiler. (GH-5006) Co-authored-by: Mark Shannon <mark@hotpy.org> Co-authored-by: Antoine Pitrou <antoine@python.org>
* bpo-32550. Remove the STORE_ANNOTATION bytecode. (GH-5181)Mark Shannon2018-01-301-1/+1
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* Issue #26110: Add LOAD_METHOD/CALL_METHOD opcodes.Yury Selivanov2016-12-141-2/+2
| | | | | | | Special thanks to INADA Naoki for pushing the patch through the last mile, Serhiy Storchaka for reviewing the code, and to Victor Stinner for suggesting the idea (originally implemented in the PyPy project).
* Issue #28257: Improved error message when pass a non-iterable asSerhiy Storchaka2016-10-021-1/+1
| | | | a var-positional argument. Added opcode BUILD_TUPLE_UNPACK_WITH_CALL.
* Rework CALL_FUNCTION* opcodesVictor Stinner2016-09-091-2/+2
| | | | | | | | | | | | | | | | | | | Issue #27213: Rework CALL_FUNCTION* opcodes to produce shorter and more efficient bytecode: * CALL_FUNCTION now only accepts position arguments * CALL_FUNCTION_KW accepts position arguments and keyword arguments, but keys of keyword arguments are packed into a constant tuple. * CALL_FUNCTION_EX is the most generic, it expects a tuple and a dict for positional and keyword arguments. CALL_FUNCTION_VAR and CALL_FUNCTION_VAR_KW opcodes have been removed. 2 tests of test_traceback are currently broken: skip test, the issue #28050 was created to track the issue. Patch by Demur Rumed, design by Serhiy Storchaka, reviewed by Serhiy Storchaka and Victor Stinner.
* Issue #27985: Implement PEP 526 -- Syntax for Variable Annotations.Yury Selivanov2016-09-091-2/+2
| | | | Patch by Ivan Levkivskyi.
* Issue #27078: Added BUILD_STRING opcode. Optimized f-strings evaluation.Serhiy Storchaka2016-09-061-1/+1
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* Issue #27095: Simplified MAKE_FUNCTION and removed MAKE_CLOSURE opcodes.Serhiy Storchaka2016-06-121-1/+1
| | | | Patch by Demur Rumed.
* Issue #27140: Added BUILD_CONST_KEY_MAP opcode.Serhiy Storchaka2016-06-111-1/+1
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* Issue 25483: Add an opcode to make f-string formatting more robust.Eric V. Smith2015-11-031-1/+1
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* Issue #24400: Introduce a distinct type for 'async def' coroutines.Yury Selivanov2015-06-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary of changes: 1. Coroutines now have a distinct, separate from generators type at the C level: PyGen_Type, and a new typedef PyCoroObject. PyCoroObject shares the initial segment of struct layout with PyGenObject, making it possible to reuse existing generators machinery. The new type is exposed as 'types.CoroutineType'. As a consequence of having a new type, CO_GENERATOR flag is no longer applied to coroutines. 2. Having a separate type for coroutines made it possible to add an __await__ method to the type. Although it is not used by the interpreter (see details on that below), it makes coroutines naturally (without using __instancecheck__) conform to collections.abc.Coroutine and collections.abc.Awaitable ABCs. [The __instancecheck__ is still used for generator-based coroutines, as we don't want to add __await__ for generators.] 3. Add new opcode: GET_YIELD_FROM_ITER. The opcode is needed to allow passing native coroutines to the YIELD_FROM opcode. Before this change, 'yield from o' expression was compiled to: (o) GET_ITER LOAD_CONST YIELD_FROM Now, we use GET_YIELD_FROM_ITER instead of GET_ITER. The reason for adding a new opcode is that GET_ITER is used in some contexts (such as 'for .. in' loops) where passing a coroutine object is invalid. 4. Add two new introspection functions to the inspec module: getcoroutinestate(c) and getcoroutinelocals(c). 5. inspect.iscoroutine(o) is updated to test if 'o' is a native coroutine object. Before this commit it used abc.Coroutine, and it was requested to update inspect.isgenerator(o) to use abc.Generator; it was decided, however, that inspect functions should really be tailored for checking for native types. 6. sys.set_coroutine_wrapper(w) API is updated to work with only native coroutines. Since types.coroutine decorator supports any type of callables now, it would be confusing that it does not work for all types of coroutines. 7. Exceptions logic in generators C implementation was updated to raise clearer messages for coroutines: Before: TypeError("generator raised StopIteration") After: TypeError("coroutine raised StopIteration")
* remove STORE_MAP, since it's unusedBenjamin Peterson2015-05-281-1/+1
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* PEP 0492 -- Coroutines with async and await syntax. Issue #24017.Yury Selivanov2015-05-121-7/+7
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* PEP 448: additional unpacking generalizations (closes #2292)Benjamin Peterson2015-05-061-5/+5
| | | | Patch by Neil Girdhar.
* PEP 465: a dedicated infix operator for matrix multiplication (closes #21176)Benjamin Peterson2014-04-101-2/+2
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* rather than passing locals to the class body, just execute the class body in ↵Benjamin Peterson2013-05-161-1/+1
| | | | the proper environment
* check local class namespace before reaching for cells (closes #17853)Benjamin Peterson2013-04-301-1/+1
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* Implement PEP 380 - 'yield from' (closes #11682)Nick Coghlan2012-01-131-1/+1
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* #4617: Previously it was illegal to delete a name from the localAmaury Forgeot d'Arc2010-09-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | namespace if it occurs as a free variable in a nested block. This limitation of the compiler has been lifted, and a new opcode introduced (DELETE_DEREF). This sample was valid in 2.6, but fails to compile in 3.x without this change:: >>> def f(): ... def print_error(): ... print(e) ... try: ... something ... except Exception as e: ... print_error() ... # implicit "del e" here This sample has always been invalid in Python, and now works:: >>> def outer(x): ... def inner(): ... return x ... inner() ... del x There is no need to bump the PYC magic number: the new opcode is used for code that did not compile before.
* Issue #9225: Remove the ROT_FOUR and DUP_TOPX opcode, the latter replacedAntoine Pitrou2010-09-041-2/+2
| | | | | by the new (and simpler) DUP_TOP_TWO. Performance isn't changed, but our bytecode is a bit simplified. Patch by Demur Rumed.
* Recorded merge of revisions 81029 via svnmerge fromAntoine Pitrou2010-05-091-256/+256
| | | | | | | | | | svn+ssh://pythondev@svn.python.org/python/trunk ........ r81029 | antoine.pitrou | 2010-05-09 16:46:46 +0200 (dim., 09 mai 2010) | 3 lines Untabify C files. Will watch buildbots. ........
* Merged revisions 72912,72920,72940 via svnmerge fromBenjamin Peterson2009-06-281-1/+1
| | | | | | | | | | | | | | | | | | | | | svn+ssh://pythondev@svn.python.org/python/trunk ........ r72912 | benjamin.peterson | 2009-05-25 08:13:44 -0500 (Mon, 25 May 2009) | 5 lines add a SETUP_WITH opcode It speeds up the with statement and correctly looks up the special methods involved. ........ r72920 | benjamin.peterson | 2009-05-25 15:12:57 -0500 (Mon, 25 May 2009) | 1 line take into account the fact that SETUP_WITH pushes a finally block ........ r72940 | benjamin.peterson | 2009-05-26 07:49:59 -0500 (Tue, 26 May 2009) | 1 line teach the peepholer about SETUP_WITH ........
* http://bugs.python.org/issue4715Jeffrey Yasskin2009-02-251-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch by Antoine Pitrou optimizes the bytecode for conditional branches by merging the following "POP_TOP" instruction into the conditional jump. For example, the list comprehension "[x for x in l if not x]" produced the following bytecode: 1 0 BUILD_LIST 0 3 LOAD_FAST 0 (.0) >> 6 FOR_ITER 23 (to 32) 9 STORE_FAST 1 (x) 12 LOAD_FAST 1 (x) 15 JUMP_IF_TRUE 10 (to 28) 18 POP_TOP 19 LOAD_FAST 1 (x) 22 LIST_APPEND 2 25 JUMP_ABSOLUTE 6 >> 28 POP_TOP 29 JUMP_ABSOLUTE 6 >> 32 RETURN_VALUE but after the patch it produces the following bytecode: 1 0 BUILD_LIST 0 3 LOAD_FAST 0 (.0) >> 6 FOR_ITER 18 (to 27) 9 STORE_FAST 1 (x) 12 LOAD_FAST 1 (x) 15 POP_JUMP_IF_TRUE 6 18 LOAD_FAST 1 (x) 21 LIST_APPEND 2 24 JUMP_ABSOLUTE 6 >> 27 RETURN_VALUE Notice that not only the code is shorter, but the conditional jump (POP_JUMP_IF_TRUE) jumps right to the start of the loop instead of going through the JUMP_ABSOLUTE at the end. "continue" statements are helped similarly. Furthermore, the old jump opcodes (JUMP_IF_FALSE, JUMP_IF_TRUE) have been replaced by two new opcodes: - JUMP_IF_TRUE_OR_POP, which jumps if true and pops otherwise - JUMP_IF_FALSE_OR_POP, which jumps if false and pops otherwise
* Issue #4753: By enabling a configure option named '--with-computed-gotos'Antoine Pitrou2009-01-251-0/+258
on compilers that support it (notably: gcc, SunPro, icc), the bytecode evaluation loop is compiled with a new dispatch mechanism which gives speedups of up to 20%, depending on the system, on various benchmarks.
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