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from rpython.jit.metainterp.optimizeopt.optimizer import Optimization
from rpython.jit.metainterp.optimizeopt.util import make_dispatcher_method
from rpython.jit.metainterp.resoperation import ResOperation, rop
from rpython.jit.metainterp.history import TargetToken, JitCellToken
class OptSimplify(Optimization):
def __init__(self, unroll):
self.last_label_descr = None
self.unroll = unroll
def emit_operation(self, op):
if op.is_guard():
if self.optimizer.pendingfields is None:
self.optimizer.pendingfields = []
Optimization.emit_operation(self, op)
def optimize_CALL_PURE(self, op):
args = op.getarglist()
self.emit_operation(ResOperation(rop.CALL, args, op.result,
op.getdescr()))
def optimize_CALL_LOOPINVARIANT(self, op):
op = op.copy_and_change(rop.CALL)
self.emit_operation(op)
def optimize_VIRTUAL_REF_FINISH(self, op):
pass
def optimize_VIRTUAL_REF(self, op):
op = ResOperation(rop.SAME_AS, [op.getarg(0)], op.result)
self.emit_operation(op)
def optimize_QUASIIMMUT_FIELD(self, op):
# xxx ideally we could also kill the following GUARD_NOT_INVALIDATED
# but it's a bit hard to implement robustly if heap.py is also run
pass
def optimize_RECORD_KNOWN_CLASS(self, op):
pass
def optimize_LABEL(self, op):
if not self.unroll:
descr = op.getdescr()
if isinstance(descr, JitCellToken):
return self.optimize_JUMP(op.copy_and_change(rop.JUMP))
self.last_label_descr = op.getdescr()
self.emit_operation(op)
def optimize_JUMP(self, op):
if not self.unroll:
descr = op.getdescr()
assert isinstance(descr, JitCellToken)
if not descr.target_tokens:
assert self.last_label_descr is not None
target_token = self.last_label_descr
assert isinstance(target_token, TargetToken)
assert target_token.targeting_jitcell_token is descr
op.setdescr(self.last_label_descr)
else:
assert len(descr.target_tokens) == 1
op.setdescr(descr.target_tokens[0])
self.emit_operation(op)
def optimize_GUARD_FUTURE_CONDITION(self, op):
pass
dispatch_opt = make_dispatcher_method(OptSimplify, 'optimize_',
default=OptSimplify.emit_operation)
OptSimplify.propagate_forward = dispatch_opt
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