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Produce cleaner bytecode for 'with' and 'async with' by generating separate code for normal and exceptional paths. (#6641)

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Remove BEGIN_FINALLY, END_FINALLY, CALL_FINALLY and POP_FINALLY bytecodes. Implement finally blocks by code duplication.
Reimplement frame.lineno setter using line numbers rather than bytecode offsets.
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Mark Shannon 2019-11-21 09:11:43 +00:00 • committed by GitHub
parent 5dcc06f6e0
commit fee552669f
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15 changed files with 4789 additions and 4754 deletions
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11
Lib/opcode.py
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@ -84,10 +84,12 @@ def_op('BINARY_TRUE_DIVIDE', 27)
def_op('INPLACE_FLOOR_DIVIDE', 28)
def_op('INPLACE_TRUE_DIVIDE', 29)
def_op('RERAISE', 48)
def_op('WITH_EXCEPT_START', 49)
def_op('GET_AITER', 50)
def_op('GET_ANEXT', 51)
def_op('BEFORE_ASYNC_WITH', 52)
def_op('BEGIN_FINALLY', 53)
def_op('END_ASYNC_FOR', 54)
def_op('INPLACE_ADD', 55)
def_op('INPLACE_SUBTRACT', 56)
@ -115,14 +117,13 @@ def_op('INPLACE_RSHIFT', 76)
def_op('INPLACE_AND', 77)
def_op('INPLACE_XOR', 78)
def_op('INPLACE_OR', 79)
def_op('WITH_CLEANUP_START', 81)
def_op('WITH_CLEANUP_FINISH', 82)
def_op('RETURN_VALUE', 83)
def_op('IMPORT_STAR', 84)
def_op('SETUP_ANNOTATIONS', 85)
def_op('YIELD_VALUE', 86)
def_op('POP_BLOCK', 87)
def_op('END_FINALLY', 88)
def_op('POP_EXCEPT', 89)
HAVE_ARGUMENT = 90 # Opcodes from here have an argument:
@ -210,7 +211,5 @@ def_op('BUILD_TUPLE_UNPACK_WITH_CALL', 158)
name_op('LOAD_METHOD', 160)
def_op('CALL_METHOD', 161)
jrel_op('CALL_FINALLY', 162)
def_op('POP_FINALLY', 163)
del def_op, name_op, jrel_op, jabs_op