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from pypy.interpreter.astcompiler.misc import mangle
from pypy.interpreter.astcompiler.assemble import Instruction, ops, Block
from pypy.interpreter.location import _encode_lnotab_pair
from pypy.interpreter.astcompiler.codegen import compute_reordering, rot_n
def test_mangle():
assert mangle("foo", "Bar") == "foo"
assert mangle("__foo__", "Bar") == "__foo__"
assert mangle("foo.baz", "Bar") == "foo.baz"
assert mangle("__", "Bar") == "__"
assert mangle("___", "Bar") == "___"
assert mangle("____", "Bar") == "____"
assert mangle("__foo", "Bar") == "_Bar__foo"
assert mangle("__foo", "_Bar") == "_Bar__foo"
assert mangle("__foo", "__Bar") == "_Bar__foo"
assert mangle("__foo", "___") == "__foo"
assert mangle("___foo", "__Bar") == "_Bar___foo"
def test_instruction_size():
assert Instruction(ops.POP_TOP).size() == 2
assert Instruction(ops.LOAD_FAST, 23).size() == 2
assert Instruction(ops.LOAD_FAST, 0xfff0).size() == 4
assert Instruction(ops.LOAD_FAST, 0x10000).size() == 6
assert Instruction(ops.LOAD_FAST, 0x1000000).size() == 8
def test_instruction_encode():
c = []
Instruction(ops.POP_TOP).encode(c)
assert c == [chr(ops.POP_TOP), '\x00']
c = []
Instruction(ops.LOAD_FAST, 1).encode(c)
assert c == [chr(ops.LOAD_FAST), '\x01']
c = []
Instruction(ops.LOAD_FAST, 0x201).encode(c)
assert c == [chr(ops.EXTENDED_ARG), '\x02', chr(ops.LOAD_FAST), '\x01']
c = []
Instruction(ops.LOAD_FAST, 0x30201).encode(c)
assert c == [chr(ops.EXTENDED_ARG), '\x03', chr(ops.EXTENDED_ARG), '\x02', chr(ops.LOAD_FAST), '\x01']
c = []
Instruction(ops.LOAD_FAST, 0x5030201).encode(c)
assert c == [chr(ops.EXTENDED_ARG), '\x05', chr(ops.EXTENDED_ARG), '\x03', chr(ops.EXTENDED_ARG), '\x02', chr(ops.LOAD_FAST), '\x01']
def test_encode_lnotab_pair():
l = []
_encode_lnotab_pair(0, 1, l)
assert l == ["\x00", "\x01"]
l = []
_encode_lnotab_pair(4, 1, l)
assert l == ["\x04", "\x01"]
l = []
_encode_lnotab_pair(4, -1, l)
assert l == ["\x04", "\xff"]
l = []
_encode_lnotab_pair(4, 127, l)
assert l == ["\x04", "\x7f"]
l = []
_encode_lnotab_pair(4, 128, l)
assert l == list("\x04\x7f\x00\x01")
l = []
_encode_lnotab_pair(4, -1000, l)
assert l == list("\x04\x80\x00\x80\x00\x80\x00\x80\x00\x80\x00\x80\x00\x80\x00\x98")
def test_compute_reordering():
import itertools
# exhaustive test up to size 8
for size in range(2, 9):
target = range(size)
for perm in itertools.permutations(range(size)):
if perm[0] == len(perm) - 1:
continue
l = list(perm)
rots = compute_reordering(l)
l = list(perm)
for rot in rots:
rot_n(l, rot)
assert l == list(reversed(target))
def jumpinstr(block, opcode, target):
jump = Instruction(opcode)
jump.jump = target
block.instructions.append(jump)
return jump
def test_jump_thread_remove_jump_to_empty():
b = Block()
b2 = Block()
b3 = Block()
b4 = Block()
b2.next_block = b3
b3.next_block = b4
jump = jumpinstr(b, ops.JUMP_FORWARD, b2)
b4.instructions.append(Instruction(ops.NOP))
b.jump_thread()
assert jump.jump is b4
def test_jump_thread_jump_to_jump_forward():
for opcode in (ops.JUMP_FORWARD, ops.JUMP_ABSOLUTE):
b = Block()
b2 = Block()
b3 = Block()
jump1 = jumpinstr(b, opcode, b2)
jump2 = jumpinstr(b2, ops.JUMP_FORWARD, b3)
b3.instructions.append(Instruction(ops.NOP))
b.jump_thread()
assert jump1.jump is b3
def test_dont_jump_thread_on_lineno_differences():
for opcode in (ops.JUMP_FORWARD, ops.JUMP_ABSOLUTE):
b = Block()
b2 = Block()
b3 = Block()
jump1 = jumpinstr(b, opcode, b2)
jump1.position_info = (1, -1, -1, -1)
jump2 = jumpinstr(b2, ops.RETURN_VALUE, b3)
jump2.position_info = (2, -1, -1, -1)
b3.instructions.append(Instruction(ops.NOP))
b.jump_thread()
assert jump1.jump is b2 # can't thread to not lose line numbers
def test_uncond_jump_despite_lineno_differences():
for opcode in (ops.JUMP_FORWARD, ops.JUMP_ABSOLUTE):
b = Block()
b2 = Block()
b3 = Block()
jump1 = jumpinstr(b, opcode, b2)
jump1.position_info = (1, -1, -1, -1)
jump2 = jumpinstr(b2, ops.JUMP_FORWARD, b3)
jump2.position_info = (2, -1, -1, -1)
instr3 = Instruction(ops.NOP)
instr3.position_info = (2, -1, -1, -1)
b3.instructions.append(instr3)
b.jump_thread()
assert jump1.jump is b3 # can't thread to not lose line numbers
def test_jump_thread_jump_to_jump_absolute():
for opcode in (ops.JUMP_FORWARD, ops.JUMP_ABSOLUTE):
b = Block()
b2 = Block()
b3 = Block()
jump1 = jumpinstr(b, opcode, b2)
jump2 = jumpinstr(b2, ops.JUMP_ABSOLUTE, b3)
b3.instructions.append(Instruction(ops.NOP))
b.jump_thread()
assert jump1.jump is b3
assert jump1.opcode == ops.JUMP_ABSOLUTE
def test_jump_thread_jump_to_return():
for opcode in (ops.JUMP_FORWARD, ops.JUMP_ABSOLUTE):
b = Block()
b2 = Block()
jump1 = jumpinstr(b, opcode, b2)
jump2 = Instruction(ops.RETURN_VALUE)
b2.instructions.append(jump2)
b.jump_thread()
assert jump1.jump is None
assert jump1.opcode == ops.RETURN_VALUE
def test_jump_thread_conditional_jump():
for opcode1 in (ops.POP_JUMP_IF_FALSE, ops.POP_JUMP_IF_TRUE,
ops.JUMP_IF_FALSE_OR_POP, ops.JUMP_IF_TRUE_OR_POP):
for opcode2 in (ops.JUMP_FORWARD, ops.JUMP_ABSOLUTE):
b = Block()
b2 = Block()
b3 = Block()
jump1 = jumpinstr(b, opcode1, b2)
jump2 = jumpinstr(b2, opcode2, b3)
b3.instructions.append(Instruction(ops.NOP))
b.jump_thread()
assert jump1.jump is b3
assert jump1.opcode == opcode1
def test_jump_thread_jump_to_jump_to_jump():
for opcode1 in (ops.POP_JUMP_IF_FALSE, ops.POP_JUMP_IF_TRUE,
ops.JUMP_IF_FALSE_OR_POP, ops.JUMP_IF_TRUE_OR_POP,
ops.JUMP_FORWARD, ops.JUMP_ABSOLUTE):
b = Block()
b2 = Block()
b3 = Block()
b4 = Block()
jump1 = jumpinstr(b, opcode1, b2)
jump2 = jumpinstr(b2, ops.JUMP_FORWARD, b3)
jump3 = jumpinstr(b3, ops.JUMP_FORWARD, b4)
b4.instructions.append(Instruction(ops.NOP))
b.jump_thread()
assert jump1.jump is b4
def test_jump_thread_fallthrough():
b = Block()
b.next_block = b2 = Block()
b2.next_block = b3 = Block()
b.instructions.append(Instruction(ops.NOP))
b3.instructions.append(Instruction(ops.NOP))
b.jump_thread()
assert b.next_block is b3
def test_block_exits_function():
for opcode in (ops.RETURN_VALUE, ops.RAISE_VARARGS, ops.RERAISE):
b = Block()
b.emit_instr(Instruction(opcode))
assert b.exits_function
assert b.cant_add_instructions
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