Author: Alex Gaynor <[email protected]>
Branch:
Changeset: r45290:68019c81cf8d
Date: 2011-07-02 17:16 -0700
http://bitbucket.org/pypy/pypy/changeset/68019c81cf8d/
Log: propogate bounds from an int_is_zero(); guard_true(); onto
int_is_true(); guard_false(); this pattern shows up in Python-level
calls, checking on various profiling things. For calls this saves a
resop + guard in the case where it isn't hoisted into the preamble.
diff --git a/pypy/jit/metainterp/optimizeopt/intbounds.py
b/pypy/jit/metainterp/optimizeopt/intbounds.py
--- a/pypy/jit/metainterp/optimizeopt/intbounds.py
+++ b/pypy/jit/metainterp/optimizeopt/intbounds.py
@@ -382,6 +382,18 @@
v1.intbound.make_gt(IntBound(0, 0))
self.propagate_bounds_backward(op.getarg(0))
+ def propagate_bounds_INT_IS_ZERO(self, op):
+ r = self.getvalue(op.result)
+ if r.is_constant():
+ if r.box.same_constant(CONST_1):
+ v1 = self.getvalue(op.getarg(0))
+ # Clever hack, we can't use self.make_constant_int yet because
+ # the args aren't in the values dictionary yet so it runs into
+ # an assert, this is a clever way of expressing the same thing.
+ v1.intbound.make_ge(IntBound(0, 0))
+ v1.intbound.make_lt(IntBound(1, 1))
+ self.propagate_bounds_backward(op.getarg(0))
+
def propagate_bounds_INT_ADD(self, op):
v1 = self.getvalue(op.getarg(0))
v2 = self.getvalue(op.getarg(1))
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
@@ -439,6 +439,23 @@
"""
self.optimize_loop(ops, expected)
+ def test_int_is_zero_int_is_true(self):
+ ops = """
+ [i0]
+ i1 = int_is_zero(i0)
+ guard_true(i1) []
+ i2 = int_is_true(i0)
+ guard_false(i2) []
+ jump(i0)
+ """
+ expected = """
+ [i0]
+ i1 = int_is_zero(i0)
+ guard_true(i1) []
+ jump(0)
+ """
+ self.optimize_loop(ops, expected)
+
def test_ooisnull_oononnull_2(self):
ops = """
[p0]
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