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from rpython.rlib import jit
from rpython.jit.metainterp.test.support import LLJitMixin
@jit.dont_look_inside
def escape(x):
return x
class ImmutableFieldsTests:
def test_fields(self):
class X(object):
_immutable_fields_ = ["x"]
def __init__(self, x):
self.x = x
def f(x):
y = escape(X(x))
return y.x + 5
res = self.interp_operations(f, [23])
assert res == 28
self.check_operations_history(getfield_gc_i=1, int_add=1)
def test_fields_subclass(self):
class X(object):
_immutable_fields_ = ["x"]
def __init__(self, x):
self.x = x
class Y(X):
_immutable_fields_ = ["y"]
def __init__(self, x, y):
X.__init__(self, x)
self.y = y
def f(x, y):
X(x) # force the field 'x' to be on class 'X'
z = escape(Y(x, y))
return z.x + z.y + 5
res = self.interp_operations(f, [23, 11])
assert res == 39
self.check_operations_history(getfield_gc_i=2, int_add=2)
def f(x, y):
# this time, the field 'x' only shows up on subclass 'Y'
z = escape(Y(x, y))
return z.x + z.y + 5
res = self.interp_operations(f, [23, 11])
assert res == 39
self.check_operations_history(getfield_gc_i=2, int_add=2)
def test_array(self):
class X(object):
_immutable_fields_ = ["y[*]"]
def __init__(self, x):
self.y = x
def f(index):
l = [1, 2, 3, 4]
l[2] = 30
a = escape(X(l))
return a.y[index]
res = self.interp_operations(f, [2], listops=True)
assert res == 30
self.check_operations_history(getfield_gc_r=1, getarrayitem_gc_i=0, getarrayitem_gc_pure_i=1)
def test_array_index_error(self):
class X(object):
_immutable_fields_ = ["y[*]"]
def __init__(self, x):
self.y = x
def get(self, index):
try:
return self.y[index]
except IndexError:
return -41
def f(index):
l = [1, 2, 3, 4]
l[2] = 30
a = escape(X(l))
return a.get(index)
res = self.interp_operations(f, [2], listops=True)
assert res == 30
self.check_operations_history(getfield_gc_r=1, getarrayitem_gc_i=0, getarrayitem_gc_pure_i=1)
def test_array_in_immutable(self):
class X(object):
_immutable_ = True
_immutable_fields_ = ["lst[*]"]
def __init__(self, lst, y):
self.lst = lst
self.y = y
def f(x, index):
y = escape(X([x], x+1))
return y.lst[index] + y.y + 5
res = self.interp_operations(f, [23, 0], listops=True)
assert res == 23 + 24 + 5
self.check_operations_history(getfield_gc_r=1, getfield_gc_i=1,
getarrayitem_gc_i=0, getarrayitem_gc_pure_i=1,
int_add=3)
def test_raw_field_and_array(self):
from rpython.rtyper.lltypesystem import lltype
X = lltype.Struct('X',
('a', lltype.Signed),
('b', lltype.Array(lltype.Signed,
hints={'nolength': True, 'immutable': True})),
hints={'immutable': True})
x = lltype.malloc(X, 4, flavor='raw', immortal=True)
x.a = 6
x.b[2] = 7
xlist = [x, lltype.nullptr(X)]
def g(num):
if num < 0:
num = 0
return num
g._dont_inline_ = True
def f(num):
num = g(num)
x = xlist[num]
return x.a * x.b[2]
#
res = self.interp_operations(f, [0], disable_optimizations=True)
assert res == 42
self.check_operations_history(getfield_raw_i=1,
getarrayitem_raw_i=1,
int_mul=1)
#
# second try, in which we get num=0 constant-folded through f()
res = self.interp_operations(f, [-1], disable_optimizations=True)
assert res == 42
self.check_operations_history(getfield_raw_i=0,
getarrayitem_raw_i=0,
int_mul=0)
def test_read_on_promoted(self):
# this test used to fail because the n = f.n was staying alive
# in a box (not a const, as it was read before promote), and
# thus the second f.n was returning the same box, although it
# could now return a const.
class Foo(object):
_immutable_fields_ = ['n']
def __init__(self, n):
self.n = n
f1 = Foo(42); f2 = Foo(43)
@jit.dont_look_inside
def some(m):
return [f1, f2][m]
@jit.dont_look_inside
def do_stuff_with(n):
print n
def main(m):
f = some(m)
n = f.n
f = jit.hint(f, promote=True)
res = f.n * 6
do_stuff_with(n)
return res
res = self.interp_operations(main, [1])
assert res == 43 * 6
self.check_operations_history(int_mul=0) # constant-folded
def test_read_on_promoted_array(self):
class Foo(object):
_immutable_fields_ = ['lst[*]']
def __init__(self, lst):
self.lst = lst
f1 = Foo([42]); f2 = Foo([43])
@jit.dont_look_inside
def some(m):
return [f1, f2][m]
@jit.dont_look_inside
def do_stuff_with(n):
print n
def main(m):
f = some(m)
n = f.lst[0]
f = jit.hint(f, promote=True)
res = f.lst[0] * 6
do_stuff_with(n)
return res
res = self.interp_operations(main, [1])
assert res == 43 * 6
self.check_operations_history(int_mul=0) # constant-folded
class TestLLtypeImmutableFieldsTests(ImmutableFieldsTests, LLJitMixin):
pass
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