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from rpython.translator.backendopt import graphanalyze
from rpython.rtyper.lltypesystem.lloperation import LL_OPERATIONS
# NB. tests are in rpython/memory/gctransform/test/test_framework.py
class CollectAnalyzer(graphanalyze.BoolGraphAnalyzer):
def analyze_direct_call(self, graph, seen=None):
try:
func = graph.func
except AttributeError:
pass
else:
if getattr(func, '_gctransformer_hint_cannot_collect_', False):
return False
if getattr(func, '_gctransformer_hint_close_stack_', False):
return True
return graphanalyze.BoolGraphAnalyzer.analyze_direct_call(self, graph,
seen)
def analyze_external_call(self, funcobj, seen=None):
if funcobj.random_effects_on_gcobjs:
return True
return graphanalyze.BoolGraphAnalyzer.analyze_external_call(
self, funcobj, seen)
def analyze_simple_operation(self, op, graphinfo):
if op.opname in ('malloc', 'malloc_varsize'):
flags = op.args[1].value
return flags['flavor'] == 'gc'
else:
return (op.opname in LL_OPERATIONS and
LL_OPERATIONS[op.opname].canmallocgc)
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