[pypy-commit] pypy default: synthesize reverse operations for float multiplcatoin.

[alex_gaynor]

Author: Alex Gaynor <alex.gaynor at gmail.com>
Branch: 
Changeset: r45693:3468fc4c3e4a
Date: 2011-07-16 19:35 -0700
http://bitbucket.org/pypy/pypy/changeset/3468fc4c3e4a/

Log:	synthesize reverse operations for float multiplcatoin.

diff --git a/pypy/jit/metainterp/optimizeopt/rewrite.py b/pypy/jit/metainterp/optimizeopt/rewrite.py
--- a/pypy/jit/metainterp/optimizeopt/rewrite.py
+++ b/pypy/jit/metainterp/optimizeopt/rewrite.py
@@ -199,6 +199,7 @@
                     ))
                     return
         self.emit_operation(op)
+        self.pure(rop.FLOAT_MUL, [arg2, arg1], op.result)
 
     def optimize_FLOAT_NEG(self, op):
         v1 = op.getarg(0)
diff --git a/pypy/jit/metainterp/optimizeopt/test/test_optimizebasic.py b/pypy/jit/metainterp/optimizeopt/test/test_optimizebasic.py
--- a/pypy/jit/metainterp/optimizeopt/test/test_optimizebasic.py
+++ b/pypy/jit/metainterp/optimizeopt/test/test_optimizebasic.py
@@ -4572,6 +4572,20 @@
         """
         self.optimize_strunicode_loop(ops, expected)
 
+    def test_float_mul_reversed(self):
+        ops = """
+        [f0, f1]
+        f2 = float_mul(f0, f1)
+        f3 = float_mul(f1, f0)
+        jump(f2, f3)
+        """
+        expected = """
+        [f0, f1]
+        f2 = float_mul(f0, f1)
+        jump(f2, f2)
+        """
+        self.optimize_loop(ops, expected)
+
 
 class TestLLtype(BaseTestOptimizeBasic, LLtypeMixin):
     pass