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gh-106529: Split FOR_ITER_RANGE into uops (#106638)

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For an example of what this does for Tier 1 and Tier 2, see
https://github.com/python/cpython/issues/106529#issuecomment-1631649920
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Guido van Rossum 2023-07-12 10:23:59 -07:00 • committed by GitHub
parent 7f55f58b6c
commit dd1884dc5d
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6 changed files with 146 additions and 28 deletions
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25
Lib/test/test_capi/test_misc.py
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@ -2443,7 +2443,6 @@ class TestUops(unittest.TestCase):
i += 1
opt = _testinternalcapi.get_uop_optimizer()
with temporary_optimizer(opt):
testfunc(1000)
@ -2580,13 +2579,33 @@ class TestUops(unittest.TestCase):
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
# for i, (opname, oparg) in enumerate(ex):
# print(f"{i:4d}: {opname:<20s} {oparg:4d}")
uops = {opname for opname, _ in ex}
# Since there is no JUMP_FORWARD instruction,
# look for indirect evidence: the += operator
self.assertIn("_BINARY_OP_ADD_INT", uops)
def test_for_iter_range(self):
def testfunc(n):
total = 0
for i in range(n):
total += i
return total
# import dis; dis.dis(testfunc)
opt = _testinternalcapi.get_uop_optimizer()
with temporary_optimizer(opt):
total = testfunc(10)
self.assertEqual(total, 45)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
# for i, (opname, oparg) in enumerate(ex):
# print(f"{i:4d}: {opname:<20s} {oparg:3d}")
uops = {opname for opname, _ in ex}
self.assertIn("_ITER_EXHAUSTED_RANGE", uops)
# Verification that the jump goes past END_FOR
# is done by manual inspection of the output
if __name__ == "__main__":
unittest.main()