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"""Tests for multiple JitDrivers."""
import py
from rpython.rlib.jit import JitDriver, unroll_safe, set_param
from rpython.jit.metainterp.test.support import LLJitMixin
from rpython.jit.metainterp.warmspot import get_stats
def getloc1():
return "in jitdriver1"
def getloc2(g):
return "in jitdriver2, with g=%d" % g
class MultipleJitDriversTests(object):
def test_simple(self):
myjitdriver1 = JitDriver(greens=[], reds=['n', 'm'],
get_printable_location = getloc1)
myjitdriver2 = JitDriver(greens=['g'], reds=['r'],
get_printable_location = getloc2)
#
def loop1(n, m):
while n > 0:
myjitdriver1.can_enter_jit(n=n, m=m)
myjitdriver1.jit_merge_point(n=n, m=m)
n -= m
return n
#
def loop2(g, r):
while r > 0:
myjitdriver2.can_enter_jit(g=g, r=r)
myjitdriver2.jit_merge_point(g=g, r=r)
r += loop1(r, g) + (-1)
return r
#
res = self.meta_interp(loop2, [4, 40], repeat=7, inline=True)
assert res == loop2(4, 40)
# we expect only one int_sub, corresponding to the single
# compiled instance of loop1()
self.check_resops(int_sub=2)
# the following numbers are not really expectations of the test
# itself, but just the numbers that we got after looking carefully
# at the generated machine code
self.check_trace_count(5)
self.check_jitcell_token_count(2) # 2 x loop including enter bridge
self.check_target_token_count(4) # 2 x loop, 2 x enter bridge
self.check_enter_count(5)
def test_inline(self):
# this is not an example of reasonable code: loop1() is unrolled
# 'n/m' times, where n and m are given as red arguments.
myjitdriver1 = JitDriver(greens=[], reds=['n', 'm'],
get_printable_location = getloc1)
myjitdriver2 = JitDriver(greens=['g'], reds=['r'],
get_printable_location = getloc2)
#
def loop1(n, m):
while n > 0:
if n > 1000:
myjitdriver1.can_enter_jit(n=n, m=m)
myjitdriver1.jit_merge_point(n=n, m=m)
n -= m
return n
#
def loop2(g, r):
set_param(None, 'function_threshold', 0)
while r > 0:
myjitdriver2.can_enter_jit(g=g, r=r)
myjitdriver2.jit_merge_point(g=g, r=r)
r += loop1(r, g) - 1
return r
#
res = self.meta_interp(loop2, [4, 40], repeat=7, inline=True)
assert res == loop2(4, 40)
# we expect no loop at all for 'loop1': it should always be inlined
# we do however get several version of 'loop2', all of which contains
# at least one int_add, while there are no int_add's in 'loop1'
self.check_jitcell_token_count(1)
for loop in get_stats().loops:
assert loop.summary()['int_add'] >= 1
def test_inactive_jitdriver(self):
myjitdriver1 = JitDriver(greens=[], reds=['n', 'm'],
get_printable_location = getloc1)
myjitdriver2 = JitDriver(greens=['g'], reds=['r'],
get_printable_location = getloc2)
#
myjitdriver1.active = False # <===
#
def loop1(n, m):
while n > 0:
myjitdriver1.can_enter_jit(n=n, m=m)
myjitdriver1.jit_merge_point(n=n, m=m)
n -= m
return n
#
def loop2(g, r):
while r > 0:
myjitdriver2.can_enter_jit(g=g, r=r)
myjitdriver2.jit_merge_point(g=g, r=r)
r += loop1(r, g) + (-1)
return r
#
res = self.meta_interp(loop2, [4, 40], repeat=7, inline=True)
assert res == loop2(4, 40)
# we expect no int_sub, but a residual call
self.check_resops(call=2, int_sub=0)
def test_multiple_jits_trace_too_long(self):
myjitdriver1 = JitDriver(greens=["n"], reds=["i", "box"])
myjitdriver2 = JitDriver(greens=["n"], reds=["i"])
class IntBox(object):
def __init__(self, val):
self.val = val
def loop1(n):
i = 0
box = IntBox(10)
while i < n:
myjitdriver1.can_enter_jit(n=n, i=i, box=box)
myjitdriver1.jit_merge_point(n=n, i=i, box=box)
i += 1
loop2(box)
return i
def loop2(n):
i = 0
f(10)
while i < n.val:
myjitdriver2.can_enter_jit(n=n, i=i)
myjitdriver2.jit_merge_point(n=n, i=i)
i += 1
@unroll_safe
def f(n):
i = 0
while i < n:
i += 1
res = self.meta_interp(loop1, [10], inline=True, trace_limit=6)
assert res == 10
stats = get_stats()
assert stats.aborted_keys == [None, None]
def test_inline_across_languages(self):
py.test.skip("why does this not work")
driver_weird = JitDriver(
greens = ["pc", "bc"],
reds = ["acc", "x", "y", "z"])
def interp1(bc, x, y, z):
pc = 0
acc = 0
while True:
driver_weird.jit_merge_point(bc=bc, pc=pc, acc=acc, x=x, y=y, z=z)
op = ord(bc[pc])
pc += 1
if op == 0:
acc += x
if op == 1:
acc += y
if op == 2:
acc *= z
if op == 3:
pc = 0
if pc >= len(bc):
break
return acc
driver = JitDriver(
greens = ["substract"],
reds = ["x"],
)
def interp2(x):
substract = interp1('\x00', 0, 0, 0)
while True:
driver.jit_merge_point(substract=substract, x=x)
substract += 1
if x < 0:
break
if substract == 10:
# computes x + 1 * (-1)
x = interp1('\x01\x02\x00', x, 1, -1)
substract = 0
interp2(100)
self.meta_interp(interp2, [100], listcomp=True, backendopt=True,
listops=True, inline=True)
self.check_resops(call_assembler=0)
class TestLLtype(MultipleJitDriversTests, LLJitMixin):
pass
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