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352 Commits

Author SHA1 Message Date
Brett Cannon
409d8f2ebd Allow classes to be defined with empty parentheses. This means that 
``class C(): pass`` is no longer a syntax error.
 2005-03-05 06:47:57 +00:00
Brett Cannon
5dc8ced4a8 Silence a gcc warning about putting in parentheses around && expressions mixed 
with || expressions.  Also clarifies intend of 'if' conditional.
 2005-03-03 07:01:48 +00:00
Raymond Hettinger
e63a078635 Preserve sign of -0.0 when result is run through marshal. 2005-02-23 13:37:55 +00:00
Raymond Hettinger
07359a7fed Document how the pattern recognizer keeps all of its references in bounds. 
Add a test in case the underlying assumptions ever change (i.e. the
compiler starts generating code blocks that are not punctuated by
RETURN_VALUE).
 2005-02-21 20:03:14 +00:00
Raymond Hettinger
80121491e0 Teach the peepholer to fold unary operations on constants. 
Afterwards, -0.5 loads in a single step and no longer requires a runtime
UNARY_NEGATIVE operation.
 2005-02-20 12:41:32 +00:00
Raymond Hettinger
b615bf0681 Remove the set conversion which didn't work with: [] in (0,) 2005-02-10 01:42:32 +00:00
Raymond Hettinger
5e547969f8 Have set conversion replace existing constant if not used elsewhere. 2005-02-09 21:24:51 +00:00
Raymond Hettinger
7fcb7869ba Adopt Skip's idea to optimize lists of constants in the context 
of a "in" or "not in" test.
 2005-02-07 19:32:38 +00:00
Raymond Hettinger
a164574937 Transform "x in (1,2,3)" to "x in frozenset([1,2,3])". 
Inspired by Skip's idea to recognize the throw-away nature of sequences
in this context and to transform their type to one with better performance.
 2005-02-06 22:05:42 +00:00
Raymond Hettinger
9feb267caf Do not fold a constant if a large sequence will result. 
Saves space in the presence of code like: (None,)*10000
 2005-01-26 12:50:05 +00:00
Armin Rigo
664b43b3f4 Re-running python with/without the -Qnew flag uses incorrectly optimized 
bytecodes from the previously saved .pyc files.  Fixed by disabling the static
optimization of BINARY_DIVIDE between two constants.
 2005-01-07 18:10:51 +00:00
Raymond Hettinger
c34f8673a1 Teach the peephole optimizer to fold simple constant expressions. 2005-01-02 06:17:33 +00:00
Jeremy Hylton
16b047904c SF patch 1025636: Check for NULL returns in compile.c:com_import_stmt 
There is no test for this change, because there is no way to provoke memory errors on demand.  Test suite passes, though.
 2004-11-07 14:04:00 +00:00
Raymond Hettinger
5dec096e6a Maintain peepholer's cumlc invariant by updating the running total 
everytime a LOAD_CONSTANT is encountered, created, or overwritten.

Added two tests to cover cases affected by the patch.
 2004-11-02 04:20:10 +00:00
Raymond Hettinger
099ecfbec9 Simplify and future proof NOP counting in the peepholer. 
No longer assumes that the input is NOP free.
 2004-11-01 15:19:11 +00:00
Armin Rigo
d7bcf4deb1 Fixed a comment and added another one. 2004-10-30 21:08:59 +00:00
Raymond Hettinger
effb3931ea Adopt some peepholer suggestions from Armin Rigo: 
* Use simpler, faster two pass algorithm for markblocks().
* Free the blocks variable if not NULL and exiting without change.
* Verify that the rest of the compiler has not set an exception.
* Make the test for tuple of constants less restrictive.
* Embellish the comment for chained conditional jumps.
 2004-10-30 08:55:08 +00:00
Raymond Hettinger
23109ef11e SF bug #1053819: Segfault in tuple_of_constants 
Peepholer could be fooled into misidentifying a tuple_of_constants.
Added code to count consecutive occurrences of LOAD_CONST.
Use the count to weed out the misidentified cases.
Added a unittest.
 2004-10-26 08:59:14 +00:00
Raymond Hettinger
9047c8f73d SF bug #1048870: call arg of lambda not updating 2004-10-24 00:10:06 +00:00
Raymond Hettinger
fec0c466ad Improve error message for augmented assignments to genexps or listcomps. 
Rather than introduce new logic, took the approach of making the message
itself more general.
 2004-09-29 23:54:08 +00:00
Raymond Hettinger
8ffc1410e2 Fix two erroneous error messages. 2004-09-29 21:47:10 +00:00
Raymond Hettinger
06cc973d06 Replaced a test with an assertion. 
(Suggested by Michael Hudson.)
 2004-09-28 17:22:12 +00:00
Raymond Hettinger
2c31a058eb SF patch #1031667: Fold tuples of constants into a single constant 
Example:
>>> import dis
>>> dis.dis(compile('1,2,3', '', 'eval'))
  0           0 LOAD_CONST               3 ((1, 2, 3))
              3 RETURN_VALUE
 2004-09-22 18:44:21 +00:00
Anthony Baxter
1a4ddaecc7 SF patch #1007189, multi-line imports, for instance: 
"from blah import (foo, bar
baz, bongo)"
 2004-08-31 10:07:13 +00:00
Raymond Hettinger
1792bfbf90 Bypass peepholing of code with lineno tables having intervals >= 255. 
Allows the lineno fixup code to remain simple and not have to deal with
multibyte codings.

* Add an assertion to that effect.
* Remove the XXX comment on the subject.
 2004-08-25 17:19:38 +00:00