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bpo-42246: Don't eliminate jumps to jumps, if it will break PEP 626. (GH-23896)

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Mark Shannon 2020-12-23 11:43:10 +00:00 committed by GitHub
parent d90ff37681
commit 28b75c80dc
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GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 4355 additions and 4253 deletions
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169
Lib/test/test_dis.py
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@ -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=32, argval=42, argrepr='to 42', offset=8, starts_line=None, is_jump_target=True), Instruction(opname='FOR_ITER', opcode=93, arg=34, 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),
@ -1023,94 +1023,95 @@ expected_opinfo_jumpy = [
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=8, argval=8, argrepr='', offset=36, 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_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=50, argval=50, argrepr='', offset=40, starts_line=None, 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='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=42, starts_line=10, is_jump_target=True), Instruction(opname='JUMP_ABSOLUTE', opcode=113, arg=8, argval=8, argrepr='', offset=42, starts_line=None, 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=44, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=44, starts_line=10, is_jump_target=True),
Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', 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='POP_TOP', opcode=1, arg=None, argval=None, 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='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=50, starts_line=11, is_jump_target=True), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=50, starts_line=None, is_jump_target=False),
Instruction(opname='POP_JUMP_IF_FALSE', opcode=114, arg=94, argval=94, argrepr='', offset=52, 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_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=54, starts_line=12, 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='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=56, 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='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', 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='POP_TOP', opcode=1, arg=None, argval=None, 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),
Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=62, starts_line=13, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=62, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_CONST', opcode=100, arg=5, argval=1, argrepr='1', offset=64, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=64, starts_line=13, is_jump_target=False),
Instruction(opname='INPLACE_SUBTRACT', opcode=56, arg=None, argval=None, argrepr='', offset=66, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=5, argval=1, argrepr='1', offset=66, starts_line=None, is_jump_target=False),
Instruction(opname='STORE_FAST', opcode=125, arg=0, argval='i', argrepr='i', offset=68, starts_line=None, is_jump_target=False), Instruction(opname='INPLACE_SUBTRACT', opcode=56, arg=None, argval=None, argrepr='', offset=68, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=70, starts_line=14, is_jump_target=False), Instruction(opname='STORE_FAST', opcode=125, arg=0, argval='i', argrepr='i', offset=70, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_CONST', opcode=100, arg=3, argval=6, argrepr='6', offset=72, starts_line=None, 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='COMPARE_OP', opcode=107, arg=4, argval='>', argrepr='>', 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='POP_JUMP_IF_FALSE', opcode=114, arg=80, argval=80, 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='JUMP_ABSOLUTE', opcode=113, arg=50, argval=50, argrepr='', offset=78, starts_line=15, 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='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=80, starts_line=16, is_jump_target=True), Instruction(opname='JUMP_ABSOLUTE', opcode=113, arg=52, argval=52, argrepr='', offset=80, starts_line=15, is_jump_target=False),
Instruction(opname='LOAD_CONST', opcode=100, arg=2, argval=4, argrepr='4', offset=82, starts_line=None, 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='COMPARE_OP', opcode=107, arg=0, argval='<', argrepr='<', 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='POP_JUMP_IF_FALSE', opcode=114, arg=90, argval=90, 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='JUMP_ABSOLUTE', opcode=113, arg=102, argval=102, argrepr='', offset=88, starts_line=17, 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='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=90, starts_line=11, is_jump_target=True), Instruction(opname='JUMP_ABSOLUTE', opcode=113, arg=104, argval=104, argrepr='', offset=90, starts_line=17, is_jump_target=False),
Instruction(opname='POP_JUMP_IF_TRUE', opcode=115, arg=54, argval=54, argrepr='', offset=92, starts_line=None, 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_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=94, starts_line=19, 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='LOAD_CONST', opcode=100, arg=6, argval='Who let lolcatz into this test suite?', argrepr="'Who let lolcatz into this test suite?'", offset=96, 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='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', 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='POP_TOP', opcode=1, arg=None, argval=None, 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='SETUP_FINALLY', opcode=122, arg=96, argval=200, argrepr='to 200', offset=102, starts_line=20, is_jump_target=True), 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=12, argval=118, argrepr='to 118', offset=104, 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='LOAD_CONST', opcode=100, arg=5, argval=1, argrepr='1', offset=106, starts_line=21, is_jump_target=False), Instruction(opname='SETUP_FINALLY', opcode=122, arg=12, argval=120, argrepr='to 120', offset=106, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_CONST', opcode=100, arg=7, argval=0, argrepr='0', offset=108, 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='BINARY_TRUE_DIVIDE', opcode=27, arg=None, argval=None, argrepr='', 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='POP_TOP', opcode=1, 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_BLOCK', opcode=87, 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='JUMP_FORWARD', opcode=110, arg=24, argval=142, argrepr='to 142', 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='DUP_TOP', opcode=4, arg=None, argval=None, argrepr='', offset=118, starts_line=22, is_jump_target=True), Instruction(opname='JUMP_FORWARD', opcode=110, arg=24, argval=144, argrepr='to 144', offset=118, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_GLOBAL', opcode=116, arg=2, argval='ZeroDivisionError', argrepr='ZeroDivisionError', offset=120, 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='JUMP_IF_NOT_EXC_MATCH', opcode=121, arg=210, argval=210, argrepr='', 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='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=124, 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='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='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=130, starts_line=23, 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='LOAD_CONST', opcode=100, arg=8, argval='Here we go, here we go, here we go...', argrepr="'Here we go, here we go, here we go...'", offset=132, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=132, starts_line=23, is_jump_target=False),
Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=134, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=8, argval='Here we go, here we go, here we go...', argrepr="'Here we go, here we go, here we go...'", offset=134, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, 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_EXCEPT', opcode=89, 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='JUMP_FORWARD', opcode=110, arg=44, argval=186, argrepr='to 186', 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='LOAD_FAST', opcode=124, arg=0, argval='i', argrepr='i', offset=142, starts_line=25, is_jump_target=True), Instruction(opname='JUMP_FORWARD', opcode=110, arg=44, argval=188, argrepr='to 188', offset=142, starts_line=None, is_jump_target=False),
Instruction(opname='SETUP_WITH', opcode=143, arg=24, argval=170, argrepr='to 170', offset=144, 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='STORE_FAST', opcode=125, arg=1, argval='dodgy', argrepr='dodgy', offset=146, starts_line=None, is_jump_target=False), Instruction(opname='SETUP_WITH', opcode=143, arg=24, argval=172, argrepr='to 172', offset=146, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=148, starts_line=26, 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_CONST', opcode=100, arg=9, argval='Never reach this', argrepr="'Never reach this'", offset=150, 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='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', 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),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=154, starts_line=None, is_jump_target=False), Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=154, starts_line=None, is_jump_target=False),
Instruction(opname='POP_BLOCK', opcode=87, arg=None, argval=None, argrepr='', offset=156, starts_line=None, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=156, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_CONST', opcode=100, arg=0, argval=None, argrepr='None', offset=158, starts_line=None, is_jump_target=False), Instruction(opname='POP_BLOCK', opcode=87, arg=None, argval=None, argrepr='', offset=158, starts_line=None, is_jump_target=False),
Instruction(opname='DUP_TOP', opcode=4, arg=None, argval=None, argrepr='', offset=160, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=0, argval=None, argrepr='None', offset=160, starts_line=None, is_jump_target=False),
Instruction(opname='DUP_TOP', opcode=4, arg=None, argval=None, argrepr='', offset=162, starts_line=None, is_jump_target=False), Instruction(opname='DUP_TOP', opcode=4, arg=None, argval=None, argrepr='', offset=162, starts_line=None, is_jump_target=False),
Instruction(opname='CALL_FUNCTION', opcode=131, arg=3, argval=3, 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='POP_TOP', opcode=1, arg=None, argval=None, 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='JUMP_FORWARD', opcode=110, arg=16, argval=186, argrepr='to 186', 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='WITH_EXCEPT_START', opcode=49, arg=None, argval=None, argrepr='', offset=170, starts_line=None, is_jump_target=True), Instruction(opname='JUMP_FORWARD', opcode=110, arg=16, argval=188, argrepr='to 188', offset=170, starts_line=None, is_jump_target=False),
Instruction(opname='POP_JUMP_IF_TRUE', opcode=115, arg=176, argval=176, argrepr='', offset=172, 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='RERAISE', opcode=119, arg=1, argval=1, argrepr='', offset=174, starts_line=None, is_jump_target=False), 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_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=176, starts_line=None, is_jump_target=True), 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=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=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),
Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=182, starts_line=None, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=182, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=184, starts_line=None, is_jump_target=False), Instruction(opname='POP_EXCEPT', opcode=89, arg=None, argval=None, argrepr='', offset=184, starts_line=None, is_jump_target=False),
Instruction(opname='POP_BLOCK', opcode=87, arg=None, argval=None, argrepr='', offset=186, starts_line=None, is_jump_target=True), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=186, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=188, starts_line=28, is_jump_target=False), Instruction(opname='POP_BLOCK', opcode=87, arg=None, argval=None, argrepr='', offset=188, starts_line=None, is_jump_target=True),
Instruction(opname='LOAD_CONST', opcode=100, arg=10, argval="OK, now we're done", argrepr='"OK, now we\'re done"', offset=190, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=190, starts_line=28, is_jump_target=False),
Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=192, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=10, argval="OK, now we're done", argrepr='"OK, now we\'re done"', offset=192, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=194, starts_line=None, is_jump_target=False), Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=194, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_CONST', opcode=100, arg=0, argval=None, argrepr='None', offset=196, starts_line=None, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=196, starts_line=None, is_jump_target=False),
Instruction(opname='RETURN_VALUE', opcode=83, arg=None, argval=None, argrepr='', offset=198, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=0, argval=None, argrepr='None', offset=198, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=200, starts_line=None, is_jump_target=True), Instruction(opname='RETURN_VALUE', opcode=83, arg=None, argval=None, argrepr='', offset=200, starts_line=None, is_jump_target=False),
Instruction(opname='LOAD_CONST', opcode=100, arg=10, argval="OK, now we're done", argrepr='"OK, now we\'re done"', offset=202, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_GLOBAL', opcode=116, arg=1, argval='print', argrepr='print', offset=202, starts_line=None, is_jump_target=True),
Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=204, starts_line=None, is_jump_target=False), Instruction(opname='LOAD_CONST', opcode=100, arg=10, argval="OK, now we're done", argrepr='"OK, now we\'re done"', offset=204, starts_line=None, is_jump_target=False),
Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=206, starts_line=None, is_jump_target=False), Instruction(opname='CALL_FUNCTION', opcode=131, arg=1, argval=1, argrepr='', offset=206, starts_line=None, is_jump_target=False),
Instruction(opname='RERAISE', opcode=119, arg=0, argval=0, argrepr='', offset=208, starts_line=None, is_jump_target=False), Instruction(opname='POP_TOP', opcode=1, arg=None, argval=None, argrepr='', offset=208, starts_line=None, is_jump_target=False),
Instruction(opname='RERAISE', opcode=119, arg=0, argval=0, argrepr='', offset=210, starts_line=22, is_jump_target=True), Instruction(opname='RERAISE', opcode=119, arg=0, argval=0, argrepr='', offset=210, starts_line=None, is_jump_target=False),
Instruction(opname='RERAISE', opcode=119, arg=0, argval=0, argrepr='', offset=212, starts_line=22, is_jump_target=True),
] ]
# One last piece of inspect fodder to check the default line number handling # One last piece of inspect fodder to check the default line number handling

64
Lib/test/test_sys_settrace.py
View File

@ -810,6 +810,70 @@ class TraceTestCase(unittest.TestCase):
(6, 'line'), (6, 'line'),
(6, 'return')]) (6, 'return')])
def test_break_to_continue1(self):
def func():
TRUE = 1
x = [1]
while x:
x.pop()
while TRUE:
break
continue
self.run_and_compare(func,
[(0, 'call'),
(1, 'line'),
(2, 'line'),
(3, 'line'),
(4, 'line'),
(5, 'line'),
(6, 'line'),
(7, 'line'),
(3, 'line'),
(3, 'return')])
def test_break_to_continue2(self):
def func():
TRUE = 1
x = [1]
while x:
x.pop()
while TRUE:
break
else:
continue
self.run_and_compare(func,
[(0, 'call'),
(1, 'line'),
(2, 'line'),
(3, 'line'),
(4, 'line'),
(5, 'line'),
(6, 'line'),
(3, 'line'),
(3, 'return')])
def test_break_to_break(self):
def func():
TRUE = 1
while TRUE:
while TRUE:
break
break
self.run_and_compare(func,
[(0, 'call'),
(1, 'line'),
(2, 'line'),
(3, 'line'),
(4, 'line'),
(5, 'line'),
(5, 'return')])
class SkipLineEventsTraceTestCase(TraceTestCase): class SkipLineEventsTraceTestCase(TraceTestCase):
"""Repeat the trace tests, but with per-line events skipped""" """Repeat the trace tests, but with per-line events skipped"""

1
Misc/NEWS.d/next/Core and Builtins/2020-12-22-20-30-11.bpo-42246.7BrPLg.rst Normal file
View File

@ -0,0 +1 @@
Jumps to jumps are not eliminated when it would break PEP 626.

135
Python/compile.c
View File

@ -1432,26 +1432,30 @@ compiler_addop_i(struct compiler *c, int opcode, Py_ssize_t oparg)
return 1; return 1;
} }
static int add_jump_to_block(basicblock *b, int opcode, int lineno, basicblock *target)
{
assert(HAS_ARG(opcode));
assert(b != NULL);
assert(target != NULL);
int off = compiler_next_instr(b);
struct instr *i = &b->b_instr[off];
if (off < 0) {
return 0;
}
i->i_opcode = opcode;
i->i_target = target;
i->i_lineno = lineno;
return 1;
}
static int static int
compiler_addop_j(struct compiler *c, int opcode, basicblock *b) compiler_addop_j(struct compiler *c, int opcode, basicblock *b)
{ {
struct instr *i;
int off;
if (c->c_do_not_emit_bytecode) { if (c->c_do_not_emit_bytecode) {
return 1; return 1;
} }
return add_jump_to_block(c->u->u_curblock, opcode, c->u->u_lineno, b);
assert(HAS_ARG(opcode));
assert(b != NULL);
off = compiler_next_instr(c->u->u_curblock);
if (off < 0)
return 0;
i = &c->u->u_curblock->b_instr[off];
i->i_opcode = opcode;
i->i_target = b;
i->i_lineno = c->u->u_lineno;
return 1;
} }
/* NEXT_BLOCK() creates an implicit jump from the current block /* NEXT_BLOCK() creates an implicit jump from the current block
@ -6067,6 +6071,27 @@ fold_tuple_on_constants(struct instr *inst,
return 0; return 0;
} }
static int
eliminate_jump_to_jump(basicblock *bb, int opcode) {
assert (bb->b_iused > 0);
struct instr *inst = &bb->b_instr[bb->b_iused-1];
assert (is_jump(inst));
assert (inst->i_target->b_iused > 0);
struct instr *target = &inst->i_target->b_instr[0];
if (inst->i_target == target->i_target) {
/* Nothing to do */
return 0;
}
int lineno = target->i_lineno;
if (add_jump_to_block(bb, opcode, lineno, target->i_target) == 0) {
return -1;
}
assert (bb->b_iused >= 2);
bb->b_instr[bb->b_iused-2].i_opcode = NOP;
return 0;
}
/* Maximum size of basic block that should be copied in optimizer */ /* Maximum size of basic block that should be copied in optimizer */
#define MAX_COPY_SIZE 4 #define MAX_COPY_SIZE 4
@ -6183,22 +6208,27 @@ optimize_basic_block(basicblock *bb, PyObject *consts)
case JUMP_IF_FALSE_OR_POP: case JUMP_IF_FALSE_OR_POP:
switch(target->i_opcode) { switch(target->i_opcode) {
case POP_JUMP_IF_FALSE: case POP_JUMP_IF_FALSE:
*inst = *target; if (inst->i_lineno == target->i_lineno) {
--i; *inst = *target;
i--;
}
break; break;
case JUMP_ABSOLUTE: case JUMP_ABSOLUTE:
case JUMP_FORWARD: case JUMP_FORWARD:
case JUMP_IF_FALSE_OR_POP: case JUMP_IF_FALSE_OR_POP:
if (inst->i_target != target->i_target) { if (inst->i_lineno == target->i_lineno &&
inst->i_target != target->i_target) {
inst->i_target = target->i_target; inst->i_target = target->i_target;
--i; i--;
} }
break; break;
case JUMP_IF_TRUE_OR_POP: case JUMP_IF_TRUE_OR_POP:
assert (inst->i_target->b_iused == 1); assert (inst->i_target->b_iused == 1);
inst->i_opcode = POP_JUMP_IF_FALSE; if (inst->i_lineno == target->i_lineno) {
inst->i_target = inst->i_target->b_next; inst->i_opcode = POP_JUMP_IF_FALSE;
--i; inst->i_target = inst->i_target->b_next;
--i;
}
break; break;
} }
break; break;
@ -6206,22 +6236,27 @@ optimize_basic_block(basicblock *bb, PyObject *consts)
case JUMP_IF_TRUE_OR_POP: case JUMP_IF_TRUE_OR_POP:
switch(target->i_opcode) { switch(target->i_opcode) {
case POP_JUMP_IF_TRUE: case POP_JUMP_IF_TRUE:
*inst = *target; if (inst->i_lineno == target->i_lineno) {
--i; *inst = *target;
i--;
}
break; break;
case JUMP_ABSOLUTE: case JUMP_ABSOLUTE:
case JUMP_FORWARD: case JUMP_FORWARD:
case JUMP_IF_TRUE_OR_POP: case JUMP_IF_TRUE_OR_POP:
if (inst->i_target != target->i_target) { if (inst->i_lineno == target->i_lineno &&
inst->i_target != target->i_target) {
inst->i_target = target->i_target; inst->i_target = target->i_target;
--i; i--;
} }
break; break;
case JUMP_IF_FALSE_OR_POP: case JUMP_IF_FALSE_OR_POP:
assert (inst->i_target->b_iused == 1); assert (inst->i_target->b_iused == 1);
inst->i_opcode = POP_JUMP_IF_TRUE; if (inst->i_lineno == target->i_lineno) {
inst->i_target = inst->i_target->b_next; inst->i_opcode = POP_JUMP_IF_TRUE;
--i; inst->i_target = inst->i_target->b_next;
--i;
}
break; break;
} }
break; break;
@ -6230,9 +6265,9 @@ optimize_basic_block(basicblock *bb, PyObject *consts)
switch(target->i_opcode) { switch(target->i_opcode) {
case JUMP_ABSOLUTE: case JUMP_ABSOLUTE:
case JUMP_FORWARD: case JUMP_FORWARD:
if (inst->i_target != target->i_target) { if (inst->i_lineno == target->i_lineno) {
inst->i_target = target->i_target; inst->i_target = target->i_target;
--i; i--;
} }
break; break;
} }
@ -6242,9 +6277,9 @@ optimize_basic_block(basicblock *bb, PyObject *consts)
switch(target->i_opcode) { switch(target->i_opcode) {
case JUMP_ABSOLUTE: case JUMP_ABSOLUTE:
case JUMP_FORWARD: case JUMP_FORWARD:
if (inst->i_target != target->i_target) { if (inst->i_lineno == target->i_lineno) {
inst->i_target = target->i_target; inst->i_target = target->i_target;
--i; i--;
} }
break; break;
} }
@ -6255,32 +6290,30 @@ optimize_basic_block(basicblock *bb, PyObject *consts)
assert (i == bb->b_iused-1); assert (i == bb->b_iused-1);
switch(target->i_opcode) { switch(target->i_opcode) {
case JUMP_FORWARD: case JUMP_FORWARD:
if (inst->i_target != target->i_target) { if (eliminate_jump_to_jump(bb, inst->i_opcode)) {
inst->i_target = target->i_target; goto error;
// --i;
} }
break; break;
case JUMP_ABSOLUTE: case JUMP_ABSOLUTE:
if (inst->i_target != target->i_target) { if (eliminate_jump_to_jump(bb, JUMP_ABSOLUTE)) {
inst->i_target = target->i_target; goto error;
inst->i_opcode = target->i_opcode;
--i;
} }
break; break;
} default:
if (inst->i_target->b_exit && inst->i_target->b_iused <= MAX_COPY_SIZE) { if (inst->i_target->b_exit && inst->i_target->b_iused <= MAX_COPY_SIZE) {
basicblock *to_copy = inst->i_target; basicblock *to_copy = inst->i_target;
inst->i_opcode = NOP; inst->i_opcode = NOP;
for (i = 0; i < to_copy->b_iused; i++) { for (i = 0; i < to_copy->b_iused; i++) {
int index = compiler_next_instr(bb); int index = compiler_next_instr(bb);
if (index < 0) { if (index < 0) {
return -1; return -1;
}
bb->b_instr[index] = to_copy->b_instr[i];
}
bb->b_exit = 1;
} }
bb->b_instr[index] = to_copy->b_instr[i];
}
bb->b_exit = 1;
} }
break;
} }
} }
return 0; return 0;

1531
Python/importlib.h generated
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4908
Python/importlib_external.h generated
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1800
Python/importlib_zipimport.h
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