Mercurial > cpython-lru_cache-weakref
diff Lib/opcode.py @ 51920:ef8fe9088696 legacy-trunk
Backport r69961 to trunk, replacing JUMP_IF_{TRUE,FALSE} with
POP_JUMP_IF_{TRUE,FALSE} and JUMP_IF_{TRUE,FALSE}_OR_POP. This avoids executing
a POP_TOP on each conditional and sometimes allows the peephole optimizer to
skip a JUMP_ABSOLUTE entirely. It speeds up list comprehensions significantly.
| author | Jeffrey Yasskin <jyasskin@gmail.com> |
|---|---|
| date | Sat, 28 Feb 2009 19:03:21 +0000 |
| parents | 94e79d78dff0 |
| children | 145376df3ad7 |
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--- a/Lib/opcode.py Sat Feb 28 15:50:40 2009 +0000 +++ b/Lib/opcode.py Sat Feb 28 19:03:21 2009 +0000 @@ -146,9 +146,11 @@ name_op('IMPORT_FROM', 108) # Index in name list jrel_op('JUMP_FORWARD', 110) # Number of bytes to skip -jrel_op('JUMP_IF_FALSE', 111) # "" -jrel_op('JUMP_IF_TRUE', 112) # "" -jabs_op('JUMP_ABSOLUTE', 113) # Target byte offset from beginning of code +jabs_op('JUMP_IF_FALSE_OR_POP', 111) # Target byte offset from beginning of code +jabs_op('JUMP_IF_TRUE_OR_POP', 112) # "" +jabs_op('JUMP_ABSOLUTE', 113) # "" +jabs_op('POP_JUMP_IF_FALSE', 114) # "" +jabs_op('POP_JUMP_IF_TRUE', 115) # "" name_op('LOAD_GLOBAL', 116) # Index in name list