[pypy-commit] pypy default: Backed out changeset: f20ac16753b6 - new hash function fails tests

[mattip]

Author: mattip <matti.picus at gmail.com>
Branch: 
Changeset: r72420:8344e652a12e
Date: 2014-07-11 22:42 +1000
http://bitbucket.org/pypy/pypy/changeset/8344e652a12e/

Log:	Backed out changeset: f20ac16753b6 - new hash function fails tests

diff --git a/pypy/module/micronumpy/descriptor.py b/pypy/module/micronumpy/descriptor.py
--- a/pypy/module/micronumpy/descriptor.py
+++ b/pypy/module/micronumpy/descriptor.py
@@ -6,7 +6,7 @@
 from pypy.interpreter.typedef import (TypeDef, GetSetProperty,
                                       interp_attrproperty, interp_attrproperty_w)
 from rpython.rlib import jit
-from rpython.rlib.objectmodel import specialize, compute_hash
+from rpython.rlib.objectmodel import specialize
 from rpython.rlib.rarithmetic import r_longlong, r_ulonglong
 from pypy.module.micronumpy import types, boxes, base, support, constants as NPY
 from pypy.module.micronumpy.appbridge import get_appbridge_cache
@@ -254,38 +254,8 @@
     def descr_ne(self, space, w_other):
         return space.wrap(not self.eq(space, w_other))
 
-    def _compute_hash(self, space, x):
-        from rpython.rlib.rarithmetic import intmask
-        if self.fields is None and self.subdtype is None:
-            endian = self.byteorder
-            if endian == NPY.NATIVE:
-                endian = NPY.NATBYTE
-            flags = 0
-            y = 0x345678
-            y = intmask((1000003 * y) ^ ord(self.kind[0]))
-            y = intmask((1000003 * y) ^ ord(endian[0]))
-            y = intmask((1000003 * y) ^ flags)
-            y = intmask((1000003 * y) ^ self.elsize)
-            if self.is_flexible():
-                y = intmask((1000003 * y) ^ self.alignment)
-            return intmask((1000003 * x) ^ y)
-        if self.fields is not None:
-            for name, (offset, subdtype) in self.fields.iteritems():
-                assert isinstance(subdtype, W_Dtype)
-                y = intmask(1000003 * (0x345678 ^ compute_hash(name)))
-                y = intmask(1000003 * (y ^ compute_hash(offset)))
-                y = intmask(1000003 * (y ^ subdtype._compute_hash(space,
-                                                                 0x345678)))
-                x = intmask(x ^ y)
-        if self.subdtype is not None:
-            for s in self.shape:
-                x = intmask((1000003 * x) ^ compute_hash(s))
-            x = self.base._compute_hash(space, x)
-        return x
-
     def descr_hash(self, space):
-        return space.wrap(self._compute_hash(space, 0x345678))
-
+        return space.hash(self.descr_reduce(space))
 
     def descr_str(self, space):
         if self.fields:
diff --git a/pypy/module/micronumpy/test/test_dtypes.py b/pypy/module/micronumpy/test/test_dtypes.py
--- a/pypy/module/micronumpy/test/test_dtypes.py
+++ b/pypy/module/micronumpy/test/test_dtypes.py
@@ -368,30 +368,15 @@
         d5 = numpy.dtype([('f0', 'i4'), ('f1', d2)])
         d6 = numpy.dtype([('f0', 'i4'), ('f1', d3)])
         import sys
-        assert hash(d1) == hash(d2)
-        assert hash(d1) != hash(d3)
-        assert hash(d4) == hash(d5)
-        assert hash(d4) != hash(d6)
+        if '__pypy__' not in sys.builtin_module_names:
+            assert hash(d1) == hash(d2)
+            assert hash(d1) != hash(d3)
+            assert hash(d4) == hash(d5)
+            assert hash(d4) != hash(d6)
+        else:
+            for d in [d1, d2, d3, d4, d5, d6]:
+                raises(TypeError, hash, d)
 
-    def test_record_hash(self):
-        from numpy import dtype
-        # make sure the fields hash return different value
-        # for different order of field in a structure
-
-        # swap names
-        t1 = dtype([('x', '<f4'), ('y', '<i4')])
-        t2 = dtype([('y', '<f4'), ('x', '<i4')])
-        assert hash(t1) != hash(t2)
-
-        # swap types
-        t3 = dtype([('x', '<f4'), ('y', '<i4')])
-        t4 = dtype([('x', '<i4'), ('y', '<f4')])
-        assert hash(t3) != hash(t4)
-
-        # swap offsets
-        t5 = dtype([('x', '<f4'), ('y', '<i4')])
-        t6 = dtype([('y', '<i4'), ('x', '<f4')])
-        assert hash(t5) != hash(t6)
     def test_pickle(self):
         import numpy as np
         from numpypy import array, dtype