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Issue #2183: Simplify and optimize bytecode for list comprehensions.

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This commit is contained in:
Antoine Pitrou 2008-12-17 00:38:28 +00:00
parent 43caaa09ea
commit d0c3515bc5
9 changed files with 34 additions and 63 deletions
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32
Lib/test/test_dis.py
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@ -54,29 +54,25 @@ def bug1333982(x=[]):
dis_bug1333982 = """\
%-4d 0 LOAD_CONST 1 (0)
3 JUMP_IF_TRUE 41 (to 47)
3 JUMP_IF_TRUE 33 (to 39)
6 POP_TOP
7 LOAD_GLOBAL 0 (AssertionError)
10 BUILD_LIST 0
13 DUP_TOP
14 STORE_FAST 1 (_[1])
17 LOAD_FAST 0 (x)
20 GET_ITER
>> 21 FOR_ITER 13 (to 37)
24 STORE_FAST 2 (s)
27 LOAD_FAST 1 (_[1])
30 LOAD_FAST 2 (s)
33 LIST_APPEND
34 JUMP_ABSOLUTE 21
>> 37 DELETE_FAST 1 (_[1])
13 LOAD_FAST 0 (x)
16 GET_ITER
>> 17 FOR_ITER 12 (to 32)
20 STORE_FAST 1 (s)
23 LOAD_FAST 1 (s)
26 LIST_APPEND 2
29 JUMP_ABSOLUTE 17
%-4d 40 LOAD_CONST 2 (1)
43 BINARY_ADD
44 RAISE_VARARGS 2
>> 47 POP_TOP
%-4d >> 32 LOAD_CONST 2 (1)
35 BINARY_ADD
36 RAISE_VARARGS 2
>> 39 POP_TOP
%-4d 48 LOAD_CONST 0 (None)
51 RETURN_VALUE
%-4d 40 LOAD_CONST 0 (None)
43 RETURN_VALUE
"""%(bug1333982.func_code.co_firstlineno + 1,
bug1333982.func_code.co_firstlineno + 2,
bug1333982.func_code.co_firstlineno + 3)