Author: Armin Rigo <ar...@tunes.org>
Branch:
Changeset: r85903:ac03886bcddb
Date: 2016-07-29 14:52 +0200
http://bitbucket.org/pypy/pypy/changeset/ac03886bcddb/
Log: Hash: turn -1 into -2 without using a condition, to avoid creating a
bridge in the JIT
diff --git a/pypy/objspace/descroperation.py b/pypy/objspace/descroperation.py
--- a/pypy/objspace/descroperation.py
+++ b/pypy/objspace/descroperation.py
@@ -424,29 +424,20 @@
raise oefmt(space.w_TypeError,
"'%T' objects are unhashable", w_obj)
w_result = space.get_and_call_function(w_hash, w_obj)
- w_resulttype = space.type(w_result)
# issue 2346 : returns now -2 for hashing -1 like cpython
- if space.is_w(w_resulttype, space.w_int):
- if space.int_w(w_result) == -1:
- return space.wrap(-2)
- return w_result
- elif space.isinstance_w(w_result, space.w_int):
- # be careful about subclasses of 'int'...
- int_result = space.int_w(w_result)
- if int_result == -1:
- int_result == -2
- return space.wrap(int_result)
+ if space.isinstance_w(w_result, space.w_int):
+ h = space.int_w(w_result)
elif space.isinstance_w(w_result, space.w_long):
- # be careful about subclasses of 'long'...
bigint = space.bigint_w(w_result)
h = bigint.hash()
- if h == -1:
- h = -2
- return space.wrap(h)
else:
raise oefmt(space.w_TypeError,
"__hash__() should return an int or long")
+ # turn -1 into -2 without using a condition, which would
+ # create a potential bridge in the JIT
+ h -= (h == -1)
+ return space.wrap(h)
def cmp(space, w_v, w_w):
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