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Maintain peepholer's cumlc invariant by updating the running total

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everytime a LOAD_CONSTANT is encountered, created, or overwritten.

Added two tests to cover cases affected by the patch.
This commit is contained in:
Raymond Hettinger 2004-11-02 04:20:10 +00:00
parent 7d112df94f
commit 5dec096e6a
2 changed files with 9 additions and 3 deletions
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4
Python/compile.c
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@ -586,6 +586,7 @@ optimize_code(PyObject *code, PyObject* consts, PyObject *names, PyObject *linen
if (PyList_GET_ITEM(consts, j) == Py_None) {
codestr[i] = LOAD_CONST;
SETARG(codestr, i, j);
cumlc = lastlc + 1;
break;
}
}
@ -601,6 +602,7 @@ optimize_code(PyObject *code, PyObject* consts, PyObject *names, PyObject *linen
!PyObject_IsTrue(PyList_GET_ITEM(consts, j)))
continue;
memset(codestr+i, NOP, 7);
cumlc = 0;
break;
/* Try to fold tuples of constants.
@ -615,6 +617,8 @@ optimize_code(PyObject *code, PyObject* consts, PyObject *names, PyObject *linen
codestr[h] == LOAD_CONST &&
ISBASICBLOCK(blocks, h, 3*(j+1)) &&
tuple_of_constants(&codestr[h], j, consts)) {
assert(codestr[i] == LOAD_CONST);
cumlc = 1;
break;
}
/* Intentional fallthrough */