| Commit message (Collapse) | Author | Age | Files | Lines |
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top-down. Now matches the PEP.
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[ 1005248 ] new.code() not cleanly checking its arguments
using the result of new.code() can still destroy the sun, but merely
calling the function shouldn't any more.
I also rewrote the existing tests of new.code() to use vastly less
un-bogus arguments, and added tests for the previous insane behaviours.
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Will backport.
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.pyc size) after all.
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Hard to believe it ever helped anything, and it hurts finding reference
leaks.
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"@ seems the syntax that everybody can hate equally"
Implementation by Mark Russell, from SF #979728.
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The preceding case statement was missing a terminating "break" stmt,
so fell into the new code by mistake. This caused uncaught out-of-bounds
accesses to the "names" tuple, leading to a variety of insane behaviors.
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Reduces the cost of "not" to almost zero.
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(Code contributed by Jiwon Seo.)
The documentation portion of the patch is being re-worked and will be
checked-in soon. Likewise, PEP 289 will be updated to reflect Guido's
rationale for the design decisions on binding behavior (as described in
in his patch comments and in discussions on python-dev).
The test file, test_genexps.py, is written in doctest format and is
meant to exercise all aspects of the the patch. Further additions are
welcome from everyone. Please stress test this new feature as much as
possible before the alpha release.
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def f(a):
if a:
print 5
else:
pass
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Gives 30% speedup on "a,b=1,2" and 25% on "a,b,c=1,2,3".
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Add a new opcode, LIST_APPEND, and apply it to the code generation for
list comprehensions. Reduces the per-loop overhead by about a third.
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and left shifts. (Thanks to Kalle Svensson for SF patch 849227.)
This addresses most of the remaining semantic changes promised by
PEP 237, except for repr() of a long, which still shows the trailing
'L'. The PEP appears to promise warnings for operations that
changed semantics compared to Python 2.3, but this is not
implemented; we've suffered through enough warnings related to
hex/oct literals and I think it's best to be silent now.
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rename LOCAL_GLOBAL to PARAM_GLOBAL.
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* Py_BuildValue("(OOO)",a,b,c) --> PyTuple_Pack(3,a,b,c)
* Py_BuildValue("()",a) --> PyTuple_New(0)
* Py_BuildValue("O", a) --> Py_INCREF(a)
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Refactor code so that one helper routine sets error location and
increments st_errors.
Bug fix candidate.
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Will backport to 2.3.1
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Make sure the inner function is not compiled when there is a syntax
error in the default arguments.
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Fixes for three related bugs, including errors that caused a script to
be ignored without printing an error message. The key problem was a bad
interaction between syntax warnings and syntax errors. If an
exception was already set when a warning was issued, the warning could
clobber the exception.
The PyErr_Occurred() check in issue_warning() isn't entirely
satisfying (the caller should know whether there was already an
error), but a better solution isn't immediately obvious.
Bug fix candidate.
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It depended on the previously removed basic block checker to
prevent a jump into the middle of the transformed block.
Clears SF 757818: tuple assignment -- SystemError: unknown opcode
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Update error message. Hopefully this is clearer to some people.
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Remove comment about how code used to work.
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to do.
XXX Please be careful when checking in patches to avoid checking in
junk that explains what the patched code used to do.
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The compiler was reseting the list comprehension tmpname counter for each function, but the symtable was using the same counter for the entire module. Repair by move tmpname into the symtable entry.
Bugfix candidate.
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about a decade ago. Put the code still allowing for it in cmp_type()
out of its lonely misery.
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riscospath.extsep, and use os.extsep throughout.
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[ 708901 ] Lineno calculation sometimes broken
A one line patch to compile.c and a rather-more-than-one-line patch
to test_dis. Hey ho.
Possibly a backport candidate -- tho' lnotab is less used in 2.2...
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The additional code complexity and new NOP opcode were not worth it.
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* Can now test for basic blocks.
* Optimize inverted comparisions.
* Optimize unary_not followed by a conditional jump.
* Added a new opcode, NOP, to keep code size constant.
* Applied NOP to previous transformations where appropriate.
Note, the NOP would not be necessary if other functions were
added to re-target jump addresses and update the co_lnotab mapping.
That would yield slightly faster and cleaner bytecode at the
expense of optimizer simplicity and of keeping it decoupled
from the line-numbering structure.
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to cover the case for: "x,y,z=1,2,3". Gives a 30% speed-up.
Also, added FOR_ITER to the list of opcodes that can jump.
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Adds a single function to improve generated bytecode. Has a single line
attachment point, so it is completely de-coupled from both the compiler
and ceval.c.
Makes three simple transforms that do not require a basic block analysis
or re-ordering of code. Gives improved timings on pystone, pybench,
and any code using either "while 1" or "x,y=y,x".
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in normal cases, and also in error cases.
Bugfix candidate.
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"Unsigned" (i.e., positive-looking, but really negative) hex/oct
constants with a leading minus sign are once again properly negated.
The micro-optimization for negated numeric constants did the wrong
thing for such hex/oct constants. The patch avoids the optimization
for all hex/oct constants.
This needs to be backported to Python 2.2!
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Incorporated nnorwitz's comment re. Py__USING_UNICODE.
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-DCALL_PROFILE: Count the number of function calls executed.
When this symbol is defined, the ceval mainloop and helper functions
count the number of function calls made. It keeps detailed statistics
about what kind of object was called and whether the call hit any of
the special fast paths in the code.
Optimization:
When we take the fast_function() path, which seems to be taken for
most function calls, and there is minimal frame setup to do, avoid
call PyEval_EvalCodeEx(). The eval code ex function does a lot of
work to handle keywords args and star args, free variables,
generators, etc. The inlined version simply allocates the frame and
copies the arguments values into the frame.
The optimization gets a little help from compile.c which adds a
CO_NOFREE flag to code objects that don't have free variables or cell
variables. This change allows fast_function() to get into the fast
path with fewer tests.
I measure a couple of percent speedup in pystone with this change, but
there's surely more that can be done.
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A variety of changes from Michael Hudson to get the compiler working
with 2.3. The primary change is the handling of SET_LINENO:
# The set_lineno() function and the explicit emit() calls for
# SET_LINENO below are only used to generate the line number table.
# As of Python 2.3, the interpreter does not have a SET_LINENO
# instruction. pyassem treats SET_LINENO opcodes as a special case.
A few other small changes:
- Remove unused code from pycodegen and pyassem.
- Fix error handling in parsermodule. When PyParser_SimplerParseString()
fails, it sets an exception with detailed info. The parsermodule
was clobbering that exception and replacing it was a generic
"could not parse string" exception. Keep the original exception.
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549213 by Jeremy (checking in for him since he's away and busy).
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