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import py
from rpython.rtyper.lltypesystem.lloperation import LL_OPERATIONS
from rpython.tool.ansi_print import ansi_log
from rpython.translator.backendopt import graphanalyze
log = py.log.Producer("canraise")
py.log.setconsumer("canraise", ansi_log)
class RaiseAnalyzer(graphanalyze.BoolGraphAnalyzer):
def analyze_simple_operation(self, op, graphinfo):
try:
return bool(LL_OPERATIONS[op.opname].canraise)
except KeyError:
log.WARNING("Unknown operation: %s" % op.opname)
return True
def analyze_external_call(self, op, seen=None):
fnobj = op.args[0].value._obj
return getattr(fnobj, 'canraise', True)
def analyze_exceptblock(self, block, seen=None):
return True
# backward compatible interface
def can_raise(self, op, seen=None):
return self.analyze(op, seen)
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