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Improve 3.x while1 reduction elimination

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rocky
2019-05-01 11:10:16 -04:00
parent 4cc53f2307
commit ce7015f382
1 changed files with 6 additions and 5 deletions
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11
uncompyle6/parsers/parse3.py
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@@ -1214,7 +1214,7 @@ class Python3Parser(PythonParser):
pass
elif lhs == 'while1stmt':
# If there is a fall through to the COME_FROM_LOOP. then this is
# If there is a fall through to the COME_FROM_LOOP, then this is
# not a while 1. So the instruction before should either be a
# JUMP_BACK or the instruction before should not be the target of a
# jump. (Well that last clause i not quite right; that target could be
@@ -1225,10 +1225,11 @@ class Python3Parser(PythonParser):
cfl = last
assert tokens[cfl] == 'COME_FROM_LOOP'
if tokens[cfl-1] != 'JUMP_BACK':
cfl_offset = tokens[cfl-1].offset
insn = next(i for i in self.insts if cfl_offset == i.offset)
if insn and insn.is_jump_target:
for i in range(cfl-1, first, -1):
if tokens[i] != 'POP_BLOCK':
break
if tokens[i].kind not in ('JUMP_BACK', 'RETURN_VALUE'):
if not tokens[i].kind.startswith('COME_FROM'):
return True
# Check that the SETUP_LOOP jumps to the offset after the