def test_automatic_augmented_assignments():
# We test that statements that could be rewritten as augmented assignments
# are correctly rewritten (using sympy to test for symbolic equality)
variables = {
'x': ArrayVariable('x', owner=None, size=10, device=device),
'y': ArrayVariable('y', owner=None, size=10, device=device),
'z': ArrayVariable('y', owner=None, size=10, device=device),
'b': ArrayVariable('b', owner=None, size=10, dtype=bool,
device=device),
'clip': DEFAULT_FUNCTIONS['clip'],
'inf': DEFAULT_CONSTANTS['inf']
}
statements = [
# examples that should be rewritten
# Note that using our approach, we will never get -= or /= but always
# the equivalent += or *= statements
('x = x + 1.0', 'x += 1.0'),
('x = 2.0 * x', 'x *= 2.0'),
('x = x - 3.0', 'x += -3.0'),
('x = x/2.0', 'x *= 0.5'),
('x = y + (x + 1.0)', 'x += y + 1.0'),
('x = x + x', 'x *= 2.0'),
('x = x + y + z', 'x += y + z'),
('x = x + y + z', 'x += y + z'),
# examples that should not be rewritten
('x = 1.0/x', 'x = 1.0/x'),
('x = 1.0', 'x = 1.0'),
('x = 2.0*(x + 1.0)', 'x = 2.0*(x + 1.0)'),
('x = clip(x + y, 0.0, inf)', 'x = clip(x + y, 0.0, inf)'),
('b = b or False', 'b = b or False')
]
for orig, rewritten in statements:
scalar, vector = make_statements(orig, variables, np.float32)
try: # we augment the assertion error with the original statement
assert len(
scalar
) == 0, 'Did not expect any scalar statements but got ' + str(
scalar)
assert len(
vector
) == 1, 'Did expect a single statement but got ' + str(vector)
statement = vector[0]
expected_var, expected_op, expected_expr, _ = parse_statement(
rewritten)
assert expected_var == statement.var, 'expected write to variable %s, not to %s' % (
expected_var, statement.var)
assert expected_op == statement.op, 'expected operation %s, not %s' % (
expected_op, statement.op)
# Compare the two expressions using sympy to allow for different order etc.
sympy_expected = str_to_sympy(expected_expr)
sympy_actual = str_to_sympy(statement.expr)
assert sympy_expected == sympy_actual, (
'RHS expressions "%s" and "%s" are not identical' %
(sympy_to_str(sympy_expected), sympy_to_str(sympy_actual)))
except AssertionError as ex:
raise AssertionError(
'Transformation for statement "%s" gave an unexpected result: %s'
% (orig, str(ex)))
def test_automatic_augmented_assignments():
# We test that statements that could be rewritten as augmented assignments
# are correctly rewritten (using sympy to test for symbolic equality)
variables = {
'x': ArrayVariable('x', owner=None, size=10,
device=device),
'y': ArrayVariable('y', owner=None, size=10,
device=device),
'z': ArrayVariable('y', owner=None, size=10,
device=device),
'b': ArrayVariable('b', owner=None, size=10,
dtype=np.bool, device=device),
'clip': DEFAULT_FUNCTIONS['clip'],
'inf': DEFAULT_CONSTANTS['inf']
}
statements = [
# examples that should be rewritten
# Note that using our approach, we will never get -= or /= but always
# the equivalent += or *= statements
('x = x + 1', 'x += 1'),
('x = 2 * x', 'x *= 2'),
('x = x - 3', 'x += -3'),
('x = x/2', 'x *= 0.5'),
('x = y + (x + 1)', 'x += y + 1'),
('x = x + x', 'x *= 2'),
('x = x + y + z', 'x += y + z'),
('x = x + y + z', 'x += y + z'),
# examples that should not be rewritten
('x = 1/x', 'x = 1/x'),
('x = 1', 'x = 1'),
('x = 2*(x + 1)', 'x = 2*(x + 1)'),
('x = clip(x + y, 0, inf)', 'x = clip(x + y, 0, inf)'),
('b = b or False', 'b = b or False')
]
for orig, rewritten in statements:
scalar, vector = make_statements(orig, variables, np.float32)
try: # we augment the assertion error with the original statement
assert len(scalar) == 0, 'Did not expect any scalar statements but got ' + str(scalar)
assert len(vector) == 1, 'Did expect a single statement but got ' + str(vector)
statement = vector[0]
expected_var, expected_op, expected_expr, _ = parse_statement(rewritten)
assert expected_var == statement.var, 'expected write to variable %s, not to %s' % (expected_var, statement.var)
assert expected_op == statement.op, 'expected operation %s, not %s' % (expected_op, statement.op)
# Compare the two expressions using sympy to allow for different order etc.
sympy_expected = str_to_sympy(expected_expr)
sympy_actual = str_to_sympy(statement.expr)
assert sympy_expected == sympy_actual, ('RHS expressions "%s" and "%s" are not identical' % (sympy_to_str(sympy_expected),
sympy_to_str(sympy_actual)))
except AssertionError as ex:
raise AssertionError('Transformation for statement "%s" gave an unexpected result: %s' % (orig, str(ex)))
