Issue #11244: Remove outdated peepholer check that was preventing the peepholer from folding -0 and -0.0. Thanks Eugene Toder for the patch.
diff --git a/Lib/test/test_peepholer.py b/Lib/test/test_peepholer.py
index f73565e..78de909 100644
--- a/Lib/test/test_peepholer.py
+++ b/Lib/test/test_peepholer.py
@@ -3,6 +3,7 @@
import sys
from io import StringIO
import unittest
+from math import copysign
def disassemble(func):
f = StringIO()
@@ -207,6 +208,9 @@
def test_folding_of_unaryops_on_constants(self):
for line, elem in (
('-0.5', '(-0.5)'), # unary negative
+ ('-0.0', '(-0.0)'), # -0.0
+ ('-(1.0-1.0)','(-0.0)'), # -0.0 after folding
+ ('-0', '(0)'), # -0
('~-2', '(1)'), # unary invert
('+1', '(1)'), # unary positive
):
@@ -214,6 +218,13 @@
self.assertIn(elem, asm, asm)
self.assertNotIn('UNARY_', asm)
+ # Check that -0.0 works after marshaling
+ def negzero():
+ return -(1.0-1.0)
+
+ self.assertNotIn('UNARY_', disassemble(negzero))
+ self.assertTrue(copysign(1.0, negzero()) < 0)
+
# Verify that unfoldables are skipped
for line, elem in (
('-"abc"', "('abc')"), # unary negative