116 lines
2.8 KiB
Python
116 lines
2.8 KiB
Python
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"""
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Tests issues or edge cases for producing invalid NRT refct
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"""
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import gc
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import numpy as np
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import unittest
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from numba import njit
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from numba.core.runtime import rtsys
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from numba.tests.support import TestCase, EnableNRTStatsMixin
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class TestNrtRefCt(EnableNRTStatsMixin, TestCase):
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def setUp(self):
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# Clean up any NRT-backed objects hanging in a dead reference cycle
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gc.collect()
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super(TestNrtRefCt, self).setUp()
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def test_no_return(self):
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"""
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Test issue #1291
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"""
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@njit
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def foo(n):
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for i in range(n):
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temp = np.zeros(2)
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return 0
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n = 10
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init_stats = rtsys.get_allocation_stats()
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foo(n)
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cur_stats = rtsys.get_allocation_stats()
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self.assertEqual(cur_stats.alloc - init_stats.alloc, n)
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self.assertEqual(cur_stats.free - init_stats.free, n)
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def test_escaping_var_init_in_loop(self):
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"""
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Test issue #1297
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"""
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@njit
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def g(n):
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x = np.zeros((n, 2))
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for i in range(n):
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y = x[i]
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for i in range(n):
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y = x[i]
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return 0
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init_stats = rtsys.get_allocation_stats()
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g(10)
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cur_stats = rtsys.get_allocation_stats()
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self.assertEqual(cur_stats.alloc - init_stats.alloc, 1)
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self.assertEqual(cur_stats.free - init_stats.free, 1)
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def test_invalid_computation_of_lifetime(self):
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"""
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Test issue #1573
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"""
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@njit
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def if_with_allocation_and_initialization(arr1, test1):
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tmp_arr = np.zeros_like(arr1)
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for i in range(tmp_arr.shape[0]):
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pass
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if test1:
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np.zeros_like(arr1)
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return tmp_arr
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arr = np.random.random((5, 5)) # the values are not consumed
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init_stats = rtsys.get_allocation_stats()
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if_with_allocation_and_initialization(arr, False)
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cur_stats = rtsys.get_allocation_stats()
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self.assertEqual(cur_stats.alloc - init_stats.alloc,
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cur_stats.free - init_stats.free)
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def test_del_at_beginning_of_loop(self):
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"""
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Test issue #1734
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"""
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@njit
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def f(arr):
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res = 0
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for i in (0, 1):
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# `del t` is issued here before defining t. It must be
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# correctly handled by the lowering phase.
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t = arr[i]
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if t[i] > 1:
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res += t[i]
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return res
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arr = np.ones((2, 2))
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init_stats = rtsys.get_allocation_stats()
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f(arr)
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cur_stats = rtsys.get_allocation_stats()
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self.assertEqual(cur_stats.alloc - init_stats.alloc,
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cur_stats.free - init_stats.free)
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if __name__ == '__main__':
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unittest.main()
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