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bpo-27129: Use instruction offsets, not byte offsets, in bytecode and internally. (GH-25069) 

* Use instruction offset, rather than bytecode offset. Streamlines interpreter dispatch a bit, and removes most EXTENDED_ARGs for jumps.

* Change some uses of PyCode_Addr2Line to PyFrame_GetLineNumber
This commit is contained in:
Mark Shannon 2021-04-01 16:00:31 +01:00 committed by GitHub
parent 2ac0515027
commit fcb55c0037
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
14 changed files with 4568 additions and 4569 deletions
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9
Lib/dis.py
View File

@ -338,8 +338,11 @@ def _get_instructions_bytes(code, varnames=None, names=None, constants=None,
argval, argrepr = _get_const_info(arg, constants) argval, argrepr = _get_const_info(arg, constants)
elif op in hasname: elif op in hasname:
argval, argrepr = _get_name_info(arg, names) argval, argrepr = _get_name_info(arg, names)
elif op in hasjabs:
argval = arg*2
argrepr = "to " + repr(argval)
elif op in hasjrel: elif op in hasjrel:
argval = offset + 2 + arg argval = offset + 2 + arg*2
argrepr = "to " + repr(argval) argrepr = "to " + repr(argval)
elif op in haslocal: elif op in haslocal:
argval, argrepr = _get_name_info(arg, varnames) argval, argrepr = _get_name_info(arg, varnames)
@ -437,9 +440,9 @@ def findlabels(code):
for offset, op, arg in _unpack_opargs(code): for offset, op, arg in _unpack_opargs(code):
if arg is not None: if arg is not None:
if op in hasjrel: if op in hasjrel:
label = offset + 2 + arg label = offset + 2 + arg*2
elif op in hasjabs: elif op in hasjabs:
label = arg label = arg*2
else: else:
continue continue
if label not in labels: if label not in labels:

1
Lib/importlib/_bootstrap_external.py
View File

@ -314,6 +314,7 @@ _code_type = type(_write_atomic.__code__)
# Python 3.10a2 3432 (Function annotation for MAKE_FUNCTION is changed from dict to tuple bpo-42202) # Python 3.10a2 3432 (Function annotation for MAKE_FUNCTION is changed from dict to tuple bpo-42202)
# Python 3.10a2 3433 (RERAISE restores f_lasti if oparg != 0) # Python 3.10a2 3433 (RERAISE restores f_lasti if oparg != 0)
# Python 3.10a6 3434 (PEP 634: Structural Pattern Matching) # Python 3.10a6 3434 (PEP 634: Structural Pattern Matching)
# Python 3.10a7 3435 Use instruction offsets (as opposed to byte offsets).
# #
# MAGIC must change whenever the bytecode emitted by the compiler may no # MAGIC must change whenever the bytecode emitted by the compiler may no

60
Lib/test/test_dis.py
View File

@ -127,10 +127,10 @@ dis_bug708901 = """\
%3d 6 CALL_FUNCTION 2 %3d 6 CALL_FUNCTION 2
8 GET_ITER 8 GET_ITER
>> 10 FOR_ITER 4 (to 16) >> 10 FOR_ITER 2 (to 16)
12 STORE_FAST 0 (res) 12 STORE_FAST 0 (res)
%3d 14 JUMP_ABSOLUTE 10 %3d 14 JUMP_ABSOLUTE 5 (to 10)
%3d >> 16 LOAD_CONST 0 (None) %3d >> 16 LOAD_CONST 0 (None)
18 RETURN_VALUE 18 RETURN_VALUE
@ -276,11 +276,11 @@ dis_compound_stmt_str = """\
10 INPLACE_ADD 10 INPLACE_ADD
12 STORE_NAME 0 (x) 12 STORE_NAME 0 (x)
2 14 JUMP_ABSOLUTE 6 2 14 JUMP_ABSOLUTE 3 (to 6)
""" """
dis_traceback = """\ dis_traceback = """\
%3d 0 SETUP_FINALLY 14 (to 16) %3d 0 SETUP_FINALLY 7 (to 16)
%3d 2 LOAD_CONST 1 (1) %3d 2 LOAD_CONST 1 (1)
4 LOAD_CONST 2 (0) 4 LOAD_CONST 2 (0)
@ -293,11 +293,11 @@ dis_traceback = """\
%3d >> 16 DUP_TOP %3d >> 16 DUP_TOP
18 LOAD_GLOBAL 0 (Exception) 18 LOAD_GLOBAL 0 (Exception)
20 JUMP_IF_NOT_EXC_MATCH 58 20 JUMP_IF_NOT_EXC_MATCH 29 (to 58)
22 POP_TOP 22 POP_TOP
24 STORE_FAST 0 (e) 24 STORE_FAST 0 (e)
26 POP_TOP 26 POP_TOP
28 SETUP_FINALLY 20 (to 50) 28 SETUP_FINALLY 10 (to 50)
%3d 30 LOAD_FAST 0 (e) %3d 30 LOAD_FAST 0 (e)
32 LOAD_ATTR 1 (__traceback__) 32 LOAD_ATTR 1 (__traceback__)
@ -358,7 +358,7 @@ def _tryfinallyconst(b):
b() b()
dis_tryfinally = """\ dis_tryfinally = """\
%3d 0 SETUP_FINALLY 12 (to 14) %3d 0 SETUP_FINALLY 6 (to 14)
%3d 2 LOAD_FAST 0 (a) %3d 2 LOAD_FAST 0 (a)
4 POP_BLOCK 4 POP_BLOCK
@ -377,7 +377,7 @@ dis_tryfinally = """\
) )
dis_tryfinallyconst = """\ dis_tryfinallyconst = """\
%3d 0 SETUP_FINALLY 12 (to 14) %3d 0 SETUP_FINALLY 6 (to 14)
%3d 2 POP_BLOCK %3d 2 POP_BLOCK
@ -450,13 +450,13 @@ dis_nested_2 = """%s
Disassembly of <code object <listcomp> at 0x..., file "%s", line %d>: Disassembly of <code object <listcomp> at 0x..., file "%s", line %d>:
%3d 0 BUILD_LIST 0 %3d 0 BUILD_LIST 0
2 LOAD_FAST 0 (.0) 2 LOAD_FAST 0 (.0)
>> 4 FOR_ITER 12 (to 18) >> 4 FOR_ITER 6 (to 18)
6 STORE_FAST 1 (z) 6 STORE_FAST 1 (z)
8 LOAD_DEREF 0 (x) 8 LOAD_DEREF 0 (x)
10 LOAD_FAST 1 (z) 10 LOAD_FAST 1 (z)
12 BINARY_ADD 12 BINARY_ADD
14 LIST_APPEND 2 14 LIST_APPEND 2
16 JUMP_ABSOLUTE 4 16 JUMP_ABSOLUTE 2 (to 4)
>> 18 RETURN_VALUE >> 18 RETURN_VALUE
""" % (dis_nested_1, """ % (dis_nested_1,
__file__, __file__,
@ -1009,7 +1009,7 @@ expected_opinfo_jumpy = [
Instruction(opname='LOAD_CONST', opcode=100, arg=1, argval=10, argrepr='10', offset=2, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=1, argval=10, argrepr='10', offset=2, starts_line=None, is_jump_target=False),
Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=4, starts_line=None, is_jump_target=False), Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=4, starts_line=None, is_jump_target=False),
Instruction(opname='GET_ITER', opcode=68, arg=None, argval=None, argrepr='', offset=6, starts_line=None, is_jump_target=False), Instruction(opname='GET_ITER', opcode=68, arg=None, argval=None, argrepr='', offset=6, starts_line=None, is_jump_target=False),
Instruction(opname='FOR_ITER', opcode=93, arg=34, argval=44, argrepr='to 44', offset=8, starts_line=None, is_jump_target=True), Instruction(opname='FOR_ITER', opcode=93, arg=17, argval=44, argrepr='to 44', offset=8, starts_line=None, is_jump_target=True),
Instruction(opname='STORE_FAST', opcode=125, arg=0, argval='i', argrepr='i', offset=10, starts_line=None, is_jump_target=False), Instruction(opname='STORE_FAST', opcode=125, arg=0, argval='i', argrepr='i', offset=10, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=12, starts_line=4, is_jump_target=False), Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=12, starts_line=4, is_jump_target=False),
Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=14, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=14, starts_line=None, is_jump_target=False),
@ -1018,21 +1018,21 @@ expected_opinfo_jumpy = [
Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=20, starts_line=5, is_jump_target=False), Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=20, starts_line=5, is_jump_target=False),
Instruction(opname='LOAD_CONST', opcode=100, arg=2, argval=4, argrepr='4', offset=22, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=2, argval=4, argrepr='4', offset=22, starts_line=None, is_jump_target=False),
Instruction(opname='COMPARE_OP', opcode=107, arg=0, argval='<', argrepr='<', offset=24, starts_line=None, is_jump_target=False), Instruction(opname='COMPARE_OP', opcode=107, arg=0, argval='<', argrepr='<', offset=24, starts_line=None, is_jump_target=False),
Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=30, argval=30, argrepr='', offset=26, starts_line=None, is_jump_target=False), Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=15, argval=30, argrepr='to 30', offset=26, starts_line=None, is_jump_target=False),
Instruction(opname='JUMP_ABSOLUTE', opcode=113, arg=8, argval=8, argrepr='', offset=28, starts_line=6, is_jump_target=False), Instruction(opname='JUMP_ABSOLUTE', opcode=113, arg=4, argval=8, argrepr='to 8', offset=28, starts_line=6, is_jump_target=False),
Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=30, starts_line=7, is_jump_target=True), Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=30, starts_line=7, is_jump_target=True),
Instruction(opname='LOAD_CONST', opcode=100, arg=3, argval=6, argrepr='6', offset=32, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=3, argval=6, argrepr='6', offset=32, starts_line=None, is_jump_target=False),
Instruction(opname='COMPARE_OP', opcode=107, arg=4, argval='>', argrepr='>', offset=34, starts_line=None, is_jump_target=False), Instruction(opname='COMPARE_OP', opcode=107, arg=4, argval='>', argrepr='>', offset=34, starts_line=None, is_jump_target=False),
Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=42, argval=42, argrepr='', offset=36, starts_line=None, is_jump_target=False), Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=21, argval=42, argrepr='to 42', offset=36, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=38, starts_line=8, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=38, starts_line=8, is_jump_target=False),
Instruction(opname='JUMP_ABSOLUTE', opcode=113, arg=52, argval=52, argrepr='', offset=40, starts_line=None, is_jump_target=False), Instruction(opname='JUMP_ABSOLUTE', opcode=113, arg=26, argval=52, argrepr='to 52', offset=40, starts_line=None, is_jump_target=False),
Instruction(opname='JUMP_ABSOLUTE', opcode=113, arg=8, argval=8, argrepr='', offset=42, starts_line=7, is_jump_target=True), Instruction(opname='JUMP_ABSOLUTE', opcode=113, arg=4, argval=8, argrepr='to 8', offset=42, starts_line=7, is_jump_target=True),
Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=44, starts_line=10, is_jump_target=True), Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=44, starts_line=10, is_jump_target=True),
Instruction(opname='LOAD_CONST', opcode=100, arg=4, argval='I can haz else clause?', argrepr="'I can haz else clause?'", offset=46, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=4, argval='I can haz else clause?', argrepr="'I can haz else clause?'", offset=46, starts_line=None, is_jump_target=False),
Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=48, starts_line=None, is_jump_target=False), Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=48, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=50, starts_line=None, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=50, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=52, starts_line=11, is_jump_target=True), Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=52, starts_line=11, is_jump_target=True),
Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=96, argval=96, argrepr='', offset=54, starts_line=None, is_jump_target=False), Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=48, argval=96, argrepr='to 96', offset=54, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=56, starts_line=12, is_jump_target=True), Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=56, starts_line=12, is_jump_target=True),
Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=58, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=58, starts_line=None, is_jump_target=False),
Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=60, starts_line=None, is_jump_target=False), Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=60, starts_line=None, is_jump_target=False),
@ -1044,30 +1044,30 @@ expected_opinfo_jumpy = [
Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=72, starts_line=14, is_jump_target=False), Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=72, starts_line=14, is_jump_target=False),
Instruction(opname='LOAD_CONST', opcode=100, arg=3, argval=6, argrepr='6', offset=74, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=3, argval=6, argrepr='6', offset=74, starts_line=None, is_jump_target=False),
Instruction(opname='COMPARE_OP', opcode=107, arg=4, argval='>', argrepr='>', offset=76, starts_line=None, is_jump_target=False), Instruction(opname='COMPARE_OP', opcode=107, arg=4, argval='>', argrepr='>', offset=76, starts_line=None, is_jump_target=False),
Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=82, argval=82, argrepr='', offset=78, starts_line=None, is_jump_target=False), Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=41, argval=82, argrepr='to 82', offset=78, starts_line=None, is_jump_target=False),
Instruction(opname='JUMP_ABSOLUTE', opcode=113, arg=52, argval=52, argrepr='', offset=80, starts_line=15, is_jump_target=False), Instruction(opname='JUMP_ABSOLUTE', opcode=113, arg=26, argval=52, argrepr='to 52', offset=80, starts_line=15, is_jump_target=False),
Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=82, starts_line=16, is_jump_target=True), Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=82, starts_line=16, is_jump_target=True),
Instruction(opname='LOAD_CONST', opcode=100, arg=2, argval=4, argrepr='4', offset=84, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=2, argval=4, argrepr='4', offset=84, starts_line=None, is_jump_target=False),
Instruction(opname='COMPARE_OP', opcode=107, arg=0, argval='<', argrepr='<', offset=86, starts_line=None, is_jump_target=False), Instruction(opname='COMPARE_OP', opcode=107, arg=0, argval='<', argrepr='<', offset=86, starts_line=None, is_jump_target=False),
Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=92, argval=92, argrepr='', offset=88, starts_line=None, is_jump_target=False), Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=46, argval=92, argrepr='to 92', offset=88, starts_line=None, is_jump_target=False),
Instruction(opname='JUMP_ABSOLUTE', opcode=113, arg=104, argval=104, argrepr='', offset=90, starts_line=17, is_jump_target=False), Instruction(opname='JUMP_ABSOLUTE', opcode=113, arg=52, argval=104, argrepr='to 104', offset=90, starts_line=17, is_jump_target=False),
Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=92, starts_line=11, is_jump_target=True), Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=92, starts_line=11, is_jump_target=True),
Instruction(opname='POP_JUMP_IF_TRUE', opcode=115, arg=56, argval=56, argrepr='', offset=94, starts_line=None, is_jump_target=False), Instruction(opname='POP_JUMP_IF_TRUE', opcode=115, arg=28, argval=56, argrepr='to 56', offset=94, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=96, starts_line=19, is_jump_target=True), Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=96, starts_line=19, is_jump_target=True),
Instruction(opname='LOAD_CONST', opcode=100, arg=6, argval='Who let lolcatz into this test suite?', argrepr="'Who let lolcatz into this test suite?'", offset=98, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=6, argval='Who let lolcatz into this test suite?', argrepr="'Who let lolcatz into this test suite?'", offset=98, starts_line=None, is_jump_target=False),
Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=100, starts_line=None, is_jump_target=False), Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=100, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=102, starts_line=None, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=102, starts_line=None, is_jump_target=False),
Instruction(opname='SETUP_FINALLY', opcode=122, arg=96, argval=202, argrepr='to 202', offset=104, starts_line=20, is_jump_target=True), Instruction(opname='SETUP_FINALLY', opcode=122, arg=48, argval=202, argrepr='to 202', offset=104, starts_line=20, is_jump_target=True),
Instruction(opname='SETUP_FINALLY', opcode=122, arg=12, argval=120, argrepr='to 120', offset=106, starts_line=None, is_jump_target=False), Instruction(opname='SETUP_FINALLY', opcode=122, arg=6, argval=120, argrepr='to 120', offset=106, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_CONST', opcode=100, arg=5, argval=1, argrepr='1', offset=108, starts_line=21, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=5, argval=1, argrepr='1', offset=108, starts_line=21, is_jump_target=False),
Instruction(opname='LOAD_CONST', opcode=100, arg=7, argval=0, argrepr='0', offset=110, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=7, argval=0, argrepr='0', offset=110, starts_line=None, is_jump_target=False),
Instruction(opname='BINARY_TRUE_DIVIDE', opcode=27, arg=None, argval=None, argrepr='', offset=112, starts_line=None, is_jump_target=False), Instruction(opname='BINARY_TRUE_DIVIDE', opcode=27, arg=None, argval=None, argrepr='', offset=112, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=114, starts_line=None, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=114, starts_line=None, is_jump_target=False),
Instruction(opname='POP_BLOCK', opcode=87, arg=None, argval=None, argrepr='', offset=116, starts_line=None, is_jump_target=False), Instruction(opname='POP_BLOCK', opcode=87, arg=None, argval=None, argrepr='', offset=116, starts_line=None, is_jump_target=False),
Instruction(opname='JUMP_FORWARD', opcode=110, arg=24, argval=144, argrepr='to 144', offset=118, starts_line=None, is_jump_target=False), Instruction(opname='JUMP_FORWARD', opcode=110, arg=12, argval=144, argrepr='to 144', offset=118, starts_line=None, is_jump_target=False),
Instruction(opname='DUP_TOP', opcode=4, arg=None, argval=None, argrepr='', offset=120, starts_line=22, is_jump_target=True), Instruction(opname='DUP_TOP', opcode=4, arg=None, argval=None, argrepr='', offset=120, starts_line=22, is_jump_target=True),
Instruction(opname='LOAD_GLOBAL', opcode=116, arg=2, argval='ZeroDivisionError', argrepr='ZeroDivisionError', offset=122, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_GLOBAL', opcode=116, arg=2, argval='ZeroDivisionError', argrepr='ZeroDivisionError', offset=122, starts_line=None, is_jump_target=False),
Instruction(opname='JUMP_IF_NOT_EXC_MATCH', opcode=121, arg=212, argval=212, argrepr='', offset=124, starts_line=None, is_jump_target=False), Instruction(opname='JUMP_IF_NOT_EXC_MATCH', opcode=121, arg=106, argval=212, argrepr='to 212', offset=124, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=126, starts_line=None, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=126, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=128, starts_line=None, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=128, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=130, starts_line=None, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=130, starts_line=None, is_jump_target=False),
@ -1076,9 +1076,9 @@ expected_opinfo_jumpy = [
Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=136, starts_line=None, is_jump_target=False), Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=136, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=138, starts_line=None, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=138, starts_line=None, is_jump_target=False),
Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=140, starts_line=None, is_jump_target=False), Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=140, starts_line=None, is_jump_target=False),
Instruction(opname='JUMP_FORWARD', opcode=110, arg=44, argval=188, argrepr='to 188', offset=142, starts_line=None, is_jump_target=False), Instruction(opname='JUMP_FORWARD', opcode=110, arg=22, argval=188, argrepr='to 188', offset=142, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=144, starts_line=25, is_jump_target=True), Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=144, starts_line=25, is_jump_target=True),
Instruction(opname='SETUP_WITH', opcode=143, arg=24, argval=172, argrepr='to 172', offset=146, starts_line=None, is_jump_target=False), Instruction(opname='SETUP_WITH', opcode=143, arg=12, argval=172, argrepr='to 172', offset=146, starts_line=None, is_jump_target=False),
Instruction(opname='STORE_FAST', opcode=125, arg=1, argval='dodgy', argrepr='dodgy', offset=148, starts_line=None, is_jump_target=False), Instruction(opname='STORE_FAST', opcode=125, arg=1, argval='dodgy', argrepr='dodgy', offset=148, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=150, starts_line=26, is_jump_target=False), Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=150, starts_line=26, is_jump_target=False),
Instruction(opname='LOAD_CONST', opcode=100, arg=9, argval='Never reach this', argrepr="'Never reach this'", offset=152, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=9, argval='Never reach this', argrepr="'Never reach this'", offset=152, starts_line=None, is_jump_target=False),
@ -1090,9 +1090,9 @@ expected_opinfo_jumpy = [
Instruction(opname='DUP_TOP', opcode=4, arg=None, argval=None, argrepr='', offset=164, starts_line=None, is_jump_target=False), Instruction(opname='DUP_TOP', opcode=4, arg=None, argval=None, argrepr='', offset=164, starts_line=None, is_jump_target=False),
Instruction(opname='CALL_FUNCTION', opcode=131, arg=3, argval=3, argrepr='', offset=166, starts_line=None, is_jump_target=False), Instruction(opname='CALL_FUNCTION', opcode=131, arg=3, argval=3, argrepr='', offset=166, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=168, starts_line=None, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=168, starts_line=None, is_jump_target=False),
Instruction(opname='JUMP_FORWARD', opcode=110, arg=16, argval=188, argrepr='to 188', offset=170, starts_line=None, is_jump_target=False), Instruction(opname='JUMP_FORWARD', opcode=110, arg=8, argval=188, argrepr='to 188', offset=170, starts_line=None, is_jump_target=False),
Instruction(opname='WITH_EXCEPT_START', opcode=49, arg=None, argval=None, argrepr='', offset=172, starts_line=None, is_jump_target=True), Instruction(opname='WITH_EXCEPT_START', opcode=49, arg=None, argval=None, argrepr='', offset=172, starts_line=None, is_jump_target=True),
Instruction(opname='POP_JUMP_IF_TRUE', opcode=115, arg=178, argval=178, argrepr='', offset=174, starts_line=None, is_jump_target=False), Instruction(opname='POP_JUMP_IF_TRUE', opcode=115, arg=89, argval=178, argrepr='to 178', offset=174, starts_line=None, is_jump_target=False),
Instruction(opname='RERAISE', opcode=119, arg=1, argval=1, argrepr='', offset=176, starts_line=None, is_jump_target=False), Instruction(opname='RERAISE', opcode=119, arg=1, argval=1, argrepr='', offset=176, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=178, starts_line=None, is_jump_target=True), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=178, starts_line=None, is_jump_target=True),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=180, starts_line=None, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=180, starts_line=None, is_jump_target=False),

3
Misc/NEWS.d/next/Core and Builtins/2021-03-29-16-20-29.bpo-27129.BF03A5.rst Normal file
View File

@ -0,0 +1,3 @@
The bytecode interpreter uses instruction, rather byte, offsets internally.
This reduces the number of EXTENDED_ARG instructions needed and streamlines
instruction dispatch a bit.

2
Objects/codeobject.c
View File

@ -1246,7 +1246,7 @@ PyTypeObject PyCode_Type = {
int int
PyCode_Addr2Line(PyCodeObject *co, int addrq) PyCode_Addr2Line(PyCodeObject *co, int addrq)
{ {
if (addrq == -1) { if (addrq < 0) {
return co->co_firstlineno; return co->co_firstlineno;
} }
assert(addrq >= 0 && addrq < PyBytes_GET_SIZE(co->co_code)); assert(addrq >= 0 && addrq < PyBytes_GET_SIZE(co->co_code));

29
Objects/frameobject.c
View File

@ -15,7 +15,6 @@ static PyMemberDef frame_memberlist[] = {
{"f_code", T_OBJECT, OFF(f_code), READONLY}, {"f_code", T_OBJECT, OFF(f_code), READONLY},
{"f_builtins", T_OBJECT, OFF(f_builtins), READONLY}, {"f_builtins", T_OBJECT, OFF(f_builtins), READONLY},
{"f_globals", T_OBJECT, OFF(f_globals), READONLY}, {"f_globals", T_OBJECT, OFF(f_globals), READONLY},
{"f_lasti", T_INT, OFF(f_lasti), READONLY},
{"f_trace_lines", T_BOOL, OFF(f_trace_lines), 0}, {"f_trace_lines", T_BOOL, OFF(f_trace_lines), 0},
{"f_trace_opcodes", T_BOOL, OFF(f_trace_opcodes), 0}, {"f_trace_opcodes", T_BOOL, OFF(f_trace_opcodes), 0},
{NULL} /* Sentinel */ {NULL} /* Sentinel */
@ -46,7 +45,7 @@ PyFrame_GetLineNumber(PyFrameObject *f)
return f->f_lineno; return f->f_lineno;
} }
else { else {
return PyCode_Addr2Line(f->f_code, f->f_lasti); return PyCode_Addr2Line(f->f_code, f->f_lasti*2);
} }
} }
@ -56,6 +55,15 @@ frame_getlineno(PyFrameObject *f, void *closure)
return PyLong_FromLong(PyFrame_GetLineNumber(f)); return PyLong_FromLong(PyFrame_GetLineNumber(f));
} }
static PyObject *
frame_getlasti(PyFrameObject *f, void *closure)
{
if (f->f_lasti < 0) {
return PyLong_FromLong(-1);
}
return PyLong_FromLong(f->f_lasti*2);
}
/* Given the index of the effective opcode, /* Given the index of the effective opcode,
scan back to construct the oparg with EXTENDED_ARG */ scan back to construct the oparg with EXTENDED_ARG */
@ -135,7 +143,7 @@ markblocks(PyCodeObject *code_obj, int len)
case POP_JUMP_IF_FALSE: case POP_JUMP_IF_FALSE:
case POP_JUMP_IF_TRUE: case POP_JUMP_IF_TRUE:
case JUMP_IF_NOT_EXC_MATCH: case JUMP_IF_NOT_EXC_MATCH:
j = get_arg(code, i) / sizeof(_Py_CODEUNIT); j = get_arg(code, i);
assert(j < len); assert(j < len);
if (blocks[j] == -1 && j < i) { if (blocks[j] == -1 && j < i) {
todo = 1; todo = 1;
@ -145,7 +153,7 @@ markblocks(PyCodeObject *code_obj, int len)
blocks[i+1] = block_stack; blocks[i+1] = block_stack;
break; break;
case JUMP_ABSOLUTE: case JUMP_ABSOLUTE:
j = get_arg(code, i) / sizeof(_Py_CODEUNIT); j = get_arg(code, i);
assert(j < len); assert(j < len);
if (blocks[j] == -1 && j < i) { if (blocks[j] == -1 && j < i) {
todo = 1; todo = 1;
@ -154,7 +162,7 @@ markblocks(PyCodeObject *code_obj, int len)
blocks[j] = block_stack; blocks[j] = block_stack;
break; break;
case SETUP_FINALLY: case SETUP_FINALLY:
j = get_arg(code, i) / sizeof(_Py_CODEUNIT) + i + 1; j = get_arg(code, i) + i + 1;
assert(j < len); assert(j < len);
except_stack = push_block(block_stack, Except); except_stack = push_block(block_stack, Except);
assert(blocks[j] == -1 || blocks[j] == except_stack); assert(blocks[j] == -1 || blocks[j] == except_stack);
@ -164,7 +172,7 @@ markblocks(PyCodeObject *code_obj, int len)
break; break;
case SETUP_WITH: case SETUP_WITH:
case SETUP_ASYNC_WITH: case SETUP_ASYNC_WITH:
j = get_arg(code, i) / sizeof(_Py_CODEUNIT) + i + 1; j = get_arg(code, i) + i + 1;
assert(j < len); assert(j < len);
except_stack = push_block(block_stack, Except); except_stack = push_block(block_stack, Except);
assert(blocks[j] == -1 || blocks[j] == except_stack); assert(blocks[j] == -1 || blocks[j] == except_stack);
@ -173,7 +181,7 @@ markblocks(PyCodeObject *code_obj, int len)
blocks[i+1] = block_stack; blocks[i+1] = block_stack;
break; break;
case JUMP_FORWARD: case JUMP_FORWARD:
j = get_arg(code, i) / sizeof(_Py_CODEUNIT) + i + 1; j = get_arg(code, i) + i + 1;
assert(j < len); assert(j < len);
assert(blocks[j] == -1 || blocks[j] == block_stack); assert(blocks[j] == -1 || blocks[j] == block_stack);
blocks[j] = block_stack; blocks[j] = block_stack;
@ -186,7 +194,7 @@ markblocks(PyCodeObject *code_obj, int len)
case FOR_ITER: case FOR_ITER:
blocks[i+1] = block_stack; blocks[i+1] = block_stack;
block_stack = pop_block(block_stack); block_stack = pop_block(block_stack);
j = get_arg(code, i) / sizeof(_Py_CODEUNIT) + i + 1; j = get_arg(code, i) + i + 1;
assert(j < len); assert(j < len);
assert(blocks[j] == -1 || blocks[j] == block_stack); assert(blocks[j] == -1 || blocks[j] == block_stack);
blocks[j] = block_stack; blocks[j] = block_stack;
@ -422,7 +430,7 @@ frame_setlineno(PyFrameObject *f, PyObject* p_new_lineno, void *Py_UNUSED(ignore
int64_t target_block_stack = -1; int64_t target_block_stack = -1;
int64_t best_block_stack = -1; int64_t best_block_stack = -1;
int best_addr = -1; int best_addr = -1;
int64_t start_block_stack = blocks[f->f_lasti/sizeof(_Py_CODEUNIT)]; int64_t start_block_stack = blocks[f->f_lasti];
const char *msg = "cannot find bytecode for specified line"; const char *msg = "cannot find bytecode for specified line";
for (int i = 0; i < len; i++) { for (int i = 0; i < len; i++) {
if (lines[i] == new_lineno) { if (lines[i] == new_lineno) {
@ -431,7 +439,7 @@ frame_setlineno(PyFrameObject *f, PyObject* p_new_lineno, void *Py_UNUSED(ignore
msg = NULL; msg = NULL;
if (target_block_stack > best_block_stack) { if (target_block_stack > best_block_stack) {
best_block_stack = target_block_stack; best_block_stack = target_block_stack;
best_addr = i*sizeof(_Py_CODEUNIT); best_addr = i;
} }
} }
else if (msg) { else if (msg) {
@ -511,6 +519,7 @@ static PyGetSetDef frame_getsetlist[] = {
{"f_lineno", (getter)frame_getlineno, {"f_lineno", (getter)frame_getlineno,
(setter)frame_setlineno, NULL}, (setter)frame_setlineno, NULL},
{"f_trace", (getter)frame_gettrace, (setter)frame_settrace, NULL}, {"f_trace", (getter)frame_gettrace, (setter)frame_settrace, NULL},
{"f_lasti", (getter)frame_getlasti, NULL, NULL},
{0} {0}
}; };

4
Objects/genobject.c
View File

@ -357,7 +357,7 @@ _PyGen_yf(PyGenObject *gen)
return NULL; return NULL;
} }
if (code[f->f_lasti + sizeof(_Py_CODEUNIT)] != YIELD_FROM) if (code[(f->f_lasti+1)*sizeof(_Py_CODEUNIT)] != YIELD_FROM)
return NULL; return NULL;
assert(f->f_stackdepth > 0); assert(f->f_stackdepth > 0);
yf = f->f_valuestack[f->f_stackdepth-1]; yf = f->f_valuestack[f->f_stackdepth-1];
@ -481,7 +481,7 @@ _gen_throw(PyGenObject *gen, int close_on_genexit,
Py_DECREF(ret); Py_DECREF(ret);
/* Termination repetition of YIELD_FROM */ /* Termination repetition of YIELD_FROM */
assert(gen->gi_frame->f_lasti >= 0); assert(gen->gi_frame->f_lasti >= 0);
gen->gi_frame->f_lasti += sizeof(_Py_CODEUNIT); gen->gi_frame->f_lasti += 1;
if (_PyGen_FetchStopIterationValue(&val) == 0) { if (_PyGen_FetchStopIterationValue(&val) == 0) {
ret = gen_send(gen, val); ret = gen_send(gen, val);
Py_DECREF(val); Py_DECREF(val);

29
Python/ceval.c
View File

@ -1338,16 +1338,15 @@ eval_frame_handle_pending(PyThreadState *tstate)
/* Code access macros */ /* Code access macros */
/* The integer overflow is checked by an assertion below. */ /* The integer overflow is checked by an assertion below. */
#define INSTR_OFFSET() \ #define INSTR_OFFSET() ((int)(next_instr - first_instr))
(sizeof(_Py_CODEUNIT) * (int)(next_instr - first_instr))
#define NEXTOPARG() do { \ #define NEXTOPARG() do { \
_Py_CODEUNIT word = *next_instr; \ _Py_CODEUNIT word = *next_instr; \
opcode = _Py_OPCODE(word); \ opcode = _Py_OPCODE(word); \
oparg = _Py_OPARG(word); \ oparg = _Py_OPARG(word); \
next_instr++; \ next_instr++; \
} while (0) } while (0)
#define JUMPTO(x) (next_instr = first_instr + (x) / sizeof(_Py_CODEUNIT)) #define JUMPTO(x) (next_instr = first_instr + (x))
#define JUMPBY(x) (next_instr += (x) / sizeof(_Py_CODEUNIT)) #define JUMPBY(x) (next_instr += (x))
/* OpCode prediction macros /* OpCode prediction macros
Some opcodes tend to come in pairs thus making it possible to Some opcodes tend to come in pairs thus making it possible to
@ -1699,11 +1698,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
to the beginning of the combined pair.) to the beginning of the combined pair.)
*/ */
assert(f->f_lasti >= -1); assert(f->f_lasti >= -1);
next_instr = first_instr; next_instr = first_instr + f->f_lasti + 1;
if (f->f_lasti >= 0) {
assert(f->f_lasti % sizeof(_Py_CODEUNIT) == 0);
next_instr += f->f_lasti / sizeof(_Py_CODEUNIT) + 1;
}
stack_pointer = f->f_valuestack + f->f_stackdepth; stack_pointer = f->f_valuestack + f->f_stackdepth;
/* Set f->f_stackdepth to -1. /* Set f->f_stackdepth to -1.
* Update when returning or calling trace function. * Update when returning or calling trace function.
@ -2627,8 +2622,8 @@ main_loop:
assert (gen_status == PYGEN_NEXT); assert (gen_status == PYGEN_NEXT);
/* receiver remains on stack, retval is value to be yielded */ /* receiver remains on stack, retval is value to be yielded */
/* and repeat... */ /* and repeat... */
assert(f->f_lasti >= (int)sizeof(_Py_CODEUNIT)); assert(f->f_lasti > 0);
f->f_lasti -= sizeof(_Py_CODEUNIT); f->f_lasti -= 1;
f->f_state = FRAME_SUSPENDED; f->f_state = FRAME_SUSPENDED;
f->f_stackdepth = (int)(stack_pointer - f->f_valuestack); f->f_stackdepth = (int)(stack_pointer - f->f_valuestack);
goto exiting; goto exiting;
@ -5511,7 +5506,7 @@ call_trace(Py_tracefunc func, PyObject *obj,
} }
else { else {
initialize_trace_info(trace_info, frame); initialize_trace_info(trace_info, frame);
frame->f_lineno = _PyCode_CheckLineNumber(frame->f_lasti, &trace_info->bounds); frame->f_lineno = _PyCode_CheckLineNumber(frame->f_lasti*2, &trace_info->bounds);
} }
result = func(obj, frame, what, arg); result = func(obj, frame, what, arg);
frame->f_lineno = 0; frame->f_lineno = 0;
@ -5552,11 +5547,11 @@ maybe_call_line_trace(Py_tracefunc func, PyObject *obj,
*/ */
initialize_trace_info(trace_info, frame); initialize_trace_info(trace_info, frame);
int lastline = trace_info->bounds.ar_line; int lastline = trace_info->bounds.ar_line;
int line = _PyCode_CheckLineNumber(frame->f_lasti, &trace_info->bounds); int line = _PyCode_CheckLineNumber(frame->f_lasti*2, &trace_info->bounds);
if (line != -1 && frame->f_trace_lines) { if (line != -1 && frame->f_trace_lines) {
/* Trace backward edges or first instruction of a new line */ /* Trace backward edges or first instruction of a new line */
if (frame->f_lasti < trace_info->instr_prev || if (frame->f_lasti < trace_info->instr_prev ||
(line != lastline && frame->f_lasti == trace_info->bounds.ar_start)) (line != lastline && frame->f_lasti*2 == trace_info->bounds.ar_start))
{ {
result = call_trace(func, obj, tstate, frame, trace_info, PyTrace_LINE, Py_None); result = call_trace(func, obj, tstate, frame, trace_info, PyTrace_LINE, Py_None);
} }
@ -6475,7 +6470,7 @@ dtrace_function_entry(PyFrameObject *f)
PyCodeObject *code = f->f_code; PyCodeObject *code = f->f_code;
filename = PyUnicode_AsUTF8(code->co_filename); filename = PyUnicode_AsUTF8(code->co_filename);
funcname = PyUnicode_AsUTF8(code->co_name); funcname = PyUnicode_AsUTF8(code->co_name);
lineno = PyCode_Addr2Line(code, f->f_lasti); lineno = PyFrame_GetLineNumber(f);
PyDTrace_FUNCTION_ENTRY(filename, funcname, lineno); PyDTrace_FUNCTION_ENTRY(filename, funcname, lineno);
} }
@ -6490,7 +6485,7 @@ dtrace_function_return(PyFrameObject *f)
PyCodeObject *code = f->f_code; PyCodeObject *code = f->f_code;
filename = PyUnicode_AsUTF8(code->co_filename); filename = PyUnicode_AsUTF8(code->co_filename);
funcname = PyUnicode_AsUTF8(code->co_name); funcname = PyUnicode_AsUTF8(code->co_name);
lineno = PyCode_Addr2Line(code, f->f_lasti); lineno = PyFrame_GetLineNumber(f);
PyDTrace_FUNCTION_RETURN(filename, funcname, lineno); PyDTrace_FUNCTION_RETURN(filename, funcname, lineno);
} }
@ -6506,7 +6501,7 @@ maybe_dtrace_line(PyFrameObject *frame,
instruction window, reset the window. instruction window, reset the window.
*/ */
initialize_trace_info(trace_info, frame); initialize_trace_info(trace_info, frame);
int line = _PyCode_CheckLineNumber(frame->f_lasti, &trace_info->bounds); int line = _PyCode_CheckLineNumber(frame->f_lasti*2, &trace_info->bounds);
/* If the last instruction falls at the start of a line or if /* If the last instruction falls at the start of a line or if
it represents a jump backwards, update the frame's line it represents a jump backwards, update the frame's line
number and call the trace function. */ number and call the trace function. */

1
Python/compile.c
View File

@ -6398,7 +6398,6 @@ assemble_jump_offsets(struct assembler *a, struct compiler *c)
if (is_relative_jump(instr)) { if (is_relative_jump(instr)) {
instr->i_oparg -= bsize; instr->i_oparg -= bsize;
} }
instr->i_oparg *= sizeof(_Py_CODEUNIT);
if (instrsize(instr->i_oparg) != isize) { if (instrsize(instr->i_oparg) != isize) {
extended_arg_recompile = 1; extended_arg_recompile = 1;
} }

2175
Python/importlib.h generated
View File

File diff suppressed because it is too large Load Diff

5285
Python/importlib_external.h generated
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File diff suppressed because it is too large Load Diff

1532
Python/importlib_zipimport.h
View File

File diff suppressed because it is too large Load Diff

5
Python/traceback.c
View File

@ -233,7 +233,7 @@ _PyTraceBack_FromFrame(PyObject *tb_next, PyFrameObject *frame)
assert(tb_next == NULL || PyTraceBack_Check(tb_next)); assert(tb_next == NULL || PyTraceBack_Check(tb_next));
assert(frame != NULL); assert(frame != NULL);
return tb_create_raw((PyTracebackObject *)tb_next, frame, frame->f_lasti, return tb_create_raw((PyTracebackObject *)tb_next, frame, frame->f_lasti*2,
PyFrame_GetLineNumber(frame)); PyFrame_GetLineNumber(frame));
} }
@ -763,8 +763,7 @@ dump_frame(int fd, PyFrameObject *frame)
PUTS(fd, "???"); PUTS(fd, "???");
} }
/* PyFrame_GetLineNumber() was introduced in Python 2.7.0 and 3.2.0 */ int lineno = PyFrame_GetLineNumber(frame);
int lineno = PyCode_Addr2Line(code, frame->f_lasti);
PUTS(fd, ", line "); PUTS(fd, ", line ");
if (lineno >= 0) { if (lineno >= 0) {
_Py_DumpDecimal(fd, (size_t)lineno); _Py_DumpDecimal(fd, (size_t)lineno);

2
Tools/gdb/libpython.py
View File

@ -947,7 +947,7 @@ class PyFrameObjectPtr(PyObjectPtr):
return self.f_lineno return self.f_lineno
try: try:
return self.co.addr2line(self.f_lasti) return self.co.addr2line(self.f_lasti*2)
except Exception: except Exception:
# bpo-34989: addr2line() is a complex function, it can fail in many # bpo-34989: addr2line() is a complex function, it can fail in many
# ways. For example, it fails with a TypeError on "FakeRepr" if # ways. For example, it fails with a TypeError on "FakeRepr" if