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  r67818 | antoine.pitrou | 2008-12-17 01:38:28 +0100 (mer., 17 déc. 2008) | 3 lines

  Issue #2183: Simplify and optimize bytecode for list comprehensions.
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This commit is contained in:
Antoine Pitrou 2008-12-18 11:06:25 +00:00
parent 621601a698
commit f289ae6f01
8 changed files with 70 additions and 55 deletions
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21
Python/ceval.c
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@ -1306,9 +1306,8 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
case LIST_APPEND:
w = POP();
v = POP();
v = stack_pointer[-oparg];
err = PyList_Append(v, w);
Py_DECREF(v);
Py_DECREF(w);
if (err == 0) {
PREDICT(JUMP_ABSOLUTE);
@ -1318,9 +1317,8 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
case SET_ADD:
w = POP();
v = POP();
v = stack_pointer[-oparg];
err = PySet_Add(v, w);
Py_DECREF(v);
Py_DECREF(w);
if (err == 0) {
PREDICT(JUMP_ABSOLUTE);
@ -1935,6 +1933,21 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
if (err == 0) continue;
break;
case MAP_ADD:
w = TOP(); /* key */
u = SECOND(); /* value */
STACKADJ(-2);
v = stack_pointer[-oparg]; /* dict */
assert (PyDict_CheckExact(v));
err = PyDict_SetItem(v, w, u); /* v[w] = u */
Py_DECREF(u);
Py_DECREF(w);
if (err == 0) {
PREDICT(JUMP_ABSOLUTE);
continue;
}
break;
case LOAD_ATTR:
w = GETITEM(names, oparg);
v = TOP();