59 Commits

Author	SHA1	Message	Date
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
Raymond Hettinger	922b3e2098	Remove test for BINARY_DIVIDE.	2005-01-07 18:34:56 +00:00
Raymond Hettinger	c34f8673a1	Teach the peephole optimizer to fold simple constant expressions.	2005-01-02 06:17:33 +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	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	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
Tim Peters	66cb018c96	Whitespace normalization.	2004-08-26 05:23:19 +00:00
Raymond Hettinger	fd2d1f7870	SF Patch #1013667: Cleanup Peepholer Output ... * Make a pass to eliminate NOPs. Produce code that is more readable, more compact, and a tiny bit faster. Makes the peepholer more flexible in the scope of allowable transformations. * With Guido's okay, bumped up the magic number so that this patch gets widely exercised before the alpha goes out.	2004-08-23 23:37:48 +00:00