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import pytest, sys
from rpython.jit.codewriter.effectinfo import (effectinfo_from_writeanalyze,
EffectInfo, VirtualizableAnalyzer, compute_bitstrings)
from rpython.rlib import jit
from rpython.rtyper.lltypesystem import lltype
from rpython.rtyper.rclass import OBJECT
from rpython.translator.translator import TranslationContext, graphof
from rpython.tool.algo.bitstring import bitcheck
class FakeCPU(object):
def fielddescrof(self, T, fieldname):
return ('fielddescr', T, fieldname)
def arraydescrof(self, A):
return ('arraydescr', A)
def test_no_oopspec_duplicate():
# check that all the various EffectInfo.OS_* have unique values
oopspecs = set()
for name, value in EffectInfo.__dict__.iteritems():
if name.startswith('OS_'):
assert value not in oopspecs
oopspecs.add(value)
def test_include_read_field():
S = lltype.GcStruct("S", ("a", lltype.Signed))
effects = frozenset([("readstruct", lltype.Ptr(S), "a")])
effectinfo = effectinfo_from_writeanalyze(effects, FakeCPU())
assert list(effectinfo._readonly_descrs_fields) == [('fielddescr', S, "a")]
assert not effectinfo._write_descrs_fields
assert not effectinfo._write_descrs_arrays
assert effectinfo.single_write_descr_array is None
def test_include_write_field():
S = lltype.GcStruct("S", ("a", lltype.Signed))
effects = frozenset([("struct", lltype.Ptr(S), "a")])
effectinfo = effectinfo_from_writeanalyze(effects, FakeCPU())
assert list(effectinfo._write_descrs_fields) == [('fielddescr', S, "a")]
assert not effectinfo._readonly_descrs_fields
assert not effectinfo._write_descrs_arrays
def test_include_read_array():
A = lltype.GcArray(lltype.Signed)
effects = frozenset([("readarray", lltype.Ptr(A))])
effectinfo = effectinfo_from_writeanalyze(effects, FakeCPU())
assert not effectinfo._readonly_descrs_fields
assert list(effectinfo._readonly_descrs_arrays) == [('arraydescr', A)]
assert not effectinfo._write_descrs_fields
assert not effectinfo._write_descrs_arrays
def test_include_write_array():
A = lltype.GcArray(lltype.Signed)
effects = frozenset([("array", lltype.Ptr(A))])
effectinfo = effectinfo_from_writeanalyze(effects, FakeCPU())
assert not effectinfo._readonly_descrs_fields
assert not effectinfo._write_descrs_fields
assert list(effectinfo._write_descrs_arrays) == [('arraydescr', A)]
assert effectinfo.single_write_descr_array == ('arraydescr', A)
def test_dont_include_read_and_write_field():
S = lltype.GcStruct("S", ("a", lltype.Signed))
effects = frozenset([("readstruct", lltype.Ptr(S), "a"),
("struct", lltype.Ptr(S), "a")])
effectinfo = effectinfo_from_writeanalyze(effects, FakeCPU())
assert not effectinfo._readonly_descrs_fields
assert list(effectinfo._write_descrs_fields) == [('fielddescr', S, "a")]
assert not effectinfo._write_descrs_arrays
def test_dont_include_read_and_write_array():
A = lltype.GcArray(lltype.Signed)
effects = frozenset([("readarray", lltype.Ptr(A)),
("array", lltype.Ptr(A))])
effectinfo = effectinfo_from_writeanalyze(effects, FakeCPU())
assert not effectinfo._readonly_descrs_fields
assert not effectinfo._readonly_descrs_arrays
assert not effectinfo._write_descrs_fields
assert list(effectinfo._write_descrs_arrays) == [('arraydescr', A)]
def test_filter_out_typeptr():
effects = frozenset([("struct", lltype.Ptr(OBJECT), "typeptr")])
effectinfo = effectinfo_from_writeanalyze(effects, None)
assert not effectinfo._readonly_descrs_fields
assert not effectinfo._write_descrs_fields
assert not effectinfo._write_descrs_arrays
def test_filter_out_array_of_void():
effects = frozenset([("array", lltype.Ptr(lltype.GcArray(lltype.Void)))])
effectinfo = effectinfo_from_writeanalyze(effects, None)
assert not effectinfo._readonly_descrs_fields
assert not effectinfo._write_descrs_fields
assert not effectinfo._write_descrs_arrays
def test_filter_out_struct_with_void():
effects = frozenset([("struct", lltype.Ptr(lltype.GcStruct("x", ("a", lltype.Void))), "a")])
effectinfo = effectinfo_from_writeanalyze(effects, None)
assert not effectinfo._readonly_descrs_fields
assert not effectinfo._write_descrs_fields
assert not effectinfo._write_descrs_arrays
class TestVirtualizableAnalyzer(object):
def analyze(self, func, sig):
t = TranslationContext()
t.buildannotator().build_types(func, sig)
t.buildrtyper().specialize()
fgraph = graphof(t, func)
return VirtualizableAnalyzer(t).analyze(fgraph.startblock.operations[0])
def test_constructor(self):
class A(object):
x = 1
class B(A):
x = 2
@jit.elidable
def g(cls):
return cls()
def f(x):
if x:
cls = A
else:
cls = B
return g(cls).x
def entry(x):
return f(x)
res = self.analyze(entry, [int])
assert not res
def test_compute_bitstrings():
class FDescr:
pass
class ADescr:
pass
class CDescr:
def __init__(self, ei):
self._ei = ei
def get_extra_info(self):
return self._ei
f1descr = FDescr()
f2descr = FDescr()
f3descr = FDescr()
a1descr = ADescr()
a2descr = ADescr()
ei1 = EffectInfo(None, None, None, None, None, None,
EffectInfo.EF_RANDOM_EFFECTS)
ei2 = EffectInfo([f1descr], [], [], [], [], [])
ei3 = EffectInfo([f1descr], [a1descr, a2descr], [], [f2descr], [], [])
compute_bitstrings([CDescr(ei1), CDescr(ei2), CDescr(ei3),
f1descr, f2descr, f3descr, a1descr, a2descr])
assert f1descr.ei_index in (0, 1)
assert f2descr.ei_index == 1 - f1descr.ei_index
assert f3descr.ei_index == sys.maxint
assert a1descr.ei_index == 0
assert a2descr.ei_index == 0
assert ei1.bitstring_readonly_descrs_fields is None
assert ei1.bitstring_readonly_descrs_arrays is None
assert ei1.bitstring_write_descrs_fields is None
def expand(bitstr):
return [n for n in range(10) if bitcheck(bitstr, n)]
assert expand(ei2.bitstring_readonly_descrs_fields) == [f1descr.ei_index]
assert expand(ei2.bitstring_write_descrs_fields) == []
assert expand(ei2.bitstring_readonly_descrs_arrays) == []
assert expand(ei2.bitstring_write_descrs_arrays) == []
assert expand(ei3.bitstring_readonly_descrs_fields) == [f1descr.ei_index]
assert expand(ei3.bitstring_write_descrs_fields) == [f2descr.ei_index]
assert expand(ei3.bitstring_readonly_descrs_arrays) == [0] #a1descr,a2descr
assert expand(ei3.bitstring_write_descrs_arrays) == []
for ei in [ei2, ei3]:
for fdescr in [f1descr, f2descr]:
assert ei.check_readonly_descr_field(fdescr) == (
fdescr in ei._readonly_descrs_fields)
assert ei.check_write_descr_field(fdescr) == (
fdescr in ei._write_descrs_fields)
for adescr in [a1descr, a2descr]:
assert ei.check_readonly_descr_array(adescr) == (
adescr in ei._readonly_descrs_arrays)
assert ei.check_write_descr_array(adescr) == (
adescr in ei._write_descrs_arrays)
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