def test_propagate_copies_false(self):
arguments = [self.foo,
S('command', 'move', '$1', '$2'),
S('command', 'move', '$10', '$20'),
S('command', 'addu', '$1', '$5', 1),
S('command', 'addu', '$3', '$1', '$4'),
self.bar]
block = B(arguments)
find_basic_blocks([block])
generate_flow_graph([block])
reaching_definitions.create_in_out([block])
copy_propagation.create_in_out([block])
self.assertFalse(propagate_copies(block))
self.assertEqual(block.statements, arguments)
def test_propagate_copies_other_arg(self):
block = B([self.foo,
S('command', 'move', '$1', '$2'),
self.foo,
S('command', 'addu', '$3', '$4', '$1'),
self.bar])
find_basic_blocks([block])
generate_flow_graph([block])
reaching_definitions.create_in_out([block])
copy_propagation.create_in_out([block])
self.assertTrue(propagate_copies(block))
self.assertEqual(block.statements, [self.foo,
S('command', 'move', '$1', '$2'),
self.foo,
S('command', 'addu', '$3', '$4', '$2'),
self.bar])
