Update of /cvsroot/python/python/dist/src/Lib/test In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv3491 Modified Files: test_peepholer.py Log Message: Teach the peepholer to fold unary operations on constants. Afterwards, -0.5 loads in a single step and no longer requires a runtime UNARY_NEGATIVE operation. Index: test_peepholer.py =================================================================== RCS file: /cvsroot/python/python/dist/src/Lib/test/test_peepholer.py,v retrieving revision 1.11 retrieving revision 1.12 diff -u -d -r1.11 -r1.12 --- test_peepholer.py 10 Feb 2005 20:40:29 -0000 1.11 +++ test_peepholer.py 20 Feb 2005 12:46:54 -0000 1.12 @@ -133,6 +133,25 @@ asm = dis_single('a="x"*1000') self.assert_('(1000)' in asm) + def test_folding_of_unaryops_on_constants(self): + for line, elem in ( + ('`1`', "('1')"), # unary convert + ('-0.5', '(-0.5)'), # unary negative + ('~-2', '(1)'), # unary invert + ): + asm = dis_single(line) + self.assert_(elem in asm, asm) + self.assert_('UNARY_' not in asm) + + # Verify that unfoldables are skipped + for line, elem in ( + ('-"abc"', "('abc')"), # unary negative + ('~"abc"', "('abc')"), # unary invert + ): + asm = dis_single(line) + self.assert_(elem in asm, asm) + self.assert_('UNARY_' in asm) + def test_elim_extra_return(self): # RETURN LOAD_CONST None RETURN --> RETURN def f(x):