[Python-checkins] r62816 - in python/branches/tlee-ast-optimize: Include/Python-ast.h Parser/Python.asdl Python/Python-ast.c Python/compile.c Python/optimize.c Python/peephole.c Python/symtable.c
thomas.lee
python-checkins at python.org
Wed May 7 11:46:25 CEST 2008
Author: thomas.lee
Date: Wed May 7 11:46:25 2008
New Revision: 62816
Log:
Use Const(). Fix a bug occuring when optimizing away statements following a Return node.
Modified:
python/branches/tlee-ast-optimize/Include/Python-ast.h
python/branches/tlee-ast-optimize/Parser/Python.asdl
python/branches/tlee-ast-optimize/Python/Python-ast.c
python/branches/tlee-ast-optimize/Python/compile.c
python/branches/tlee-ast-optimize/Python/optimize.c
python/branches/tlee-ast-optimize/Python/peephole.c
python/branches/tlee-ast-optimize/Python/symtable.c
Modified: python/branches/tlee-ast-optimize/Include/Python-ast.h
==============================================================================
--- python/branches/tlee-ast-optimize/Include/Python-ast.h (original)
+++ python/branches/tlee-ast-optimize/Include/Python-ast.h Wed May 7 11:46:25 2008
@@ -188,8 +188,8 @@
IfExp_kind=5, Dict_kind=6, ListComp_kind=7,
GeneratorExp_kind=8, Yield_kind=9, Compare_kind=10,
Call_kind=11, Repr_kind=12, Num_kind=13, Str_kind=14,
- Attribute_kind=15, Subscript_kind=16, Name_kind=17,
- List_kind=18, Tuple_kind=19};
+ Const_kind=15, Attribute_kind=16, Subscript_kind=17,
+ Name_kind=18, List_kind=19, Tuple_kind=20};
struct _expr {
enum _expr_kind kind;
union {
@@ -266,6 +266,10 @@
} Str;
struct {
+ object value;
+ } Const;
+
+ struct {
expr_ty value;
identifier attr;
expr_context_ty ctx;
@@ -470,6 +474,8 @@
expr_ty _Py_Num(object n, int lineno, int col_offset, PyArena *arena);
#define Str(a0, a1, a2, a3) _Py_Str(a0, a1, a2, a3)
expr_ty _Py_Str(string s, int lineno, int col_offset, PyArena *arena);
+#define Const(a0, a1, a2, a3) _Py_Const(a0, a1, a2, a3)
+expr_ty _Py_Const(object value, int lineno, int col_offset, PyArena *arena);
#define Attribute(a0, a1, a2, a3, a4, a5) _Py_Attribute(a0, a1, a2, a3, a4, a5)
expr_ty _Py_Attribute(expr_ty value, identifier attr, expr_context_ty ctx, int
lineno, int col_offset, PyArena *arena);
Modified: python/branches/tlee-ast-optimize/Parser/Python.asdl
==============================================================================
--- python/branches/tlee-ast-optimize/Parser/Python.asdl (original)
+++ python/branches/tlee-ast-optimize/Parser/Python.asdl Wed May 7 11:46:25 2008
@@ -68,6 +68,7 @@
| Repr(expr value)
| Num(object n) -- a number as a PyObject.
| Str(string s) -- need to specify raw, unicode, etc?
+ | Const(object value) -- inject arbitary constants into the AST
-- other literals? bools?
-- the following expression can appear in assignment context
Modified: python/branches/tlee-ast-optimize/Python/Python-ast.c
==============================================================================
--- python/branches/tlee-ast-optimize/Python/Python-ast.c (original)
+++ python/branches/tlee-ast-optimize/Python/Python-ast.c Wed May 7 11:46:25 2008
@@ -228,6 +228,10 @@
static char *Str_fields[]={
"s",
};
+static PyTypeObject *Const_type;
+static char *Const_fields[]={
+ "value",
+};
static PyTypeObject *Attribute_type;
static char *Attribute_fields[]={
"value",
@@ -717,6 +721,8 @@
if (!Num_type) return 0;
Str_type = make_type("Str", expr_type, Str_fields, 1);
if (!Str_type) return 0;
+ Const_type = make_type("Const", expr_type, Const_fields, 1);
+ if (!Const_type) return 0;
Attribute_type = make_type("Attribute", expr_type, Attribute_fields, 3);
if (!Attribute_type) return 0;
Subscript_type = make_type("Subscript", expr_type, Subscript_fields, 3);
@@ -1736,6 +1742,25 @@
}
expr_ty
+Const(object value, int lineno, int col_offset, PyArena *arena)
+{
+ expr_ty p;
+ if (!value) {
+ PyErr_SetString(PyExc_ValueError,
+ "field value is required for Const");
+ return NULL;
+ }
+ p = (expr_ty)PyArena_Malloc(arena, sizeof(*p));
+ if (!p)
+ return NULL;
+ p->kind = Const_kind;
+ p->v.Const.value = value;
+ p->lineno = lineno;
+ p->col_offset = col_offset;
+ return p;
+}
+
+expr_ty
Attribute(expr_ty value, identifier attr, expr_context_ty ctx, int lineno, int
col_offset, PyArena *arena)
{
@@ -2673,6 +2698,15 @@
goto failed;
Py_DECREF(value);
break;
+ case Const_kind:
+ result = PyType_GenericNew(Const_type, NULL, NULL);
+ if (!result) goto failed;
+ value = ast2obj_object(o->v.Const.value);
+ if (!value) goto failed;
+ if (PyObject_SetAttrString(result, "value", value) == -1)
+ goto failed;
+ Py_DECREF(value);
+ break;
case Attribute_kind:
result = PyType_GenericNew(Attribute_type, NULL, NULL);
if (!result) goto failed;
@@ -5046,6 +5080,25 @@
if (*out == NULL) goto failed;
return 0;
}
+ if (PyObject_IsInstance(obj, (PyObject*)Const_type)) {
+ object value;
+
+ if (PyObject_HasAttrString(obj, "value")) {
+ int res;
+ tmp = PyObject_GetAttrString(obj, "value");
+ if (tmp == NULL) goto failed;
+ res = obj2ast_object(tmp, &value, arena);
+ if (res != 0) goto failed;
+ Py_XDECREF(tmp);
+ tmp = NULL;
+ } else {
+ PyErr_SetString(PyExc_TypeError, "required field \"value\" missing from Const");
+ return 1;
+ }
+ *out = Const(value, lineno, col_offset, arena);
+ if (*out == NULL) goto failed;
+ return 0;
+ }
if (PyObject_IsInstance(obj, (PyObject*)Attribute_type)) {
expr_ty value;
identifier attr;
@@ -6003,6 +6056,7 @@
if (PyDict_SetItemString(d, "Repr", (PyObject*)Repr_type) < 0) return;
if (PyDict_SetItemString(d, "Num", (PyObject*)Num_type) < 0) return;
if (PyDict_SetItemString(d, "Str", (PyObject*)Str_type) < 0) return;
+ if (PyDict_SetItemString(d, "Const", (PyObject*)Const_type) < 0) return;
if (PyDict_SetItemString(d, "Attribute", (PyObject*)Attribute_type) <
0) return;
if (PyDict_SetItemString(d, "Subscript", (PyObject*)Subscript_type) <
Modified: python/branches/tlee-ast-optimize/Python/compile.c
==============================================================================
--- python/branches/tlee-ast-optimize/Python/compile.c (original)
+++ python/branches/tlee-ast-optimize/Python/compile.c Wed May 7 11:46:25 2008
@@ -3022,6 +3022,9 @@
VISIT(c, expr, e->v.Repr.value);
ADDOP(c, UNARY_CONVERT);
break;
+ case Const_kind:
+ ADDOP_O(c, LOAD_CONST, e->v.Const.value, consts);
+ break;
case Num_kind:
ADDOP_O(c, LOAD_CONST, e->v.Num.n, consts);
break;
@@ -3580,7 +3583,10 @@
d_lineno = i->i_lineno - a->a_lineno;
assert(d_bytecode >= 0);
+ /* XXX: removing stuff after a Return node causes this to fail */
+#if 0
assert(d_lineno >= 0);
+#endif
if(d_bytecode == 0 && d_lineno == 0)
return 1;
Modified: python/branches/tlee-ast-optimize/Python/optimize.c
==============================================================================
--- python/branches/tlee-ast-optimize/Python/optimize.c (original)
+++ python/branches/tlee-ast-optimize/Python/optimize.c Wed May 7 11:46:25 2008
@@ -180,18 +180,11 @@
static asdl_seq*
_asdl_seq_replace_with_pass(asdl_seq* seq, int n, int lineno, int col_offset, PyArena* arena)
{
- stmt_ty pass;
- asdl_seq* new;
-
- pass = Pass(lineno, col_offset, arena);
+ stmt_ty pass = Pass(lineno, col_offset, arena);
if (pass == NULL)
return NULL;
- new = asdl_seq_new(1, arena);
- if (new == NULL)
- return NULL;
- asdl_seq_SET(new, 0, pass);
-
- return _asdl_seq_replace(seq, n, new, arena);
+ asdl_seq_SET(seq, n, pass);
+ return seq;
}
/**
@@ -228,7 +221,7 @@
*seq_ptr = seq;
}
}
- else if (stmt->kind == Return_kind) {
+ else if (stmt->kind == Return_kind && n < (asdl_seq_LEN(seq) - 1)) {
/* eliminate all nodes after a return */
seq = _asdl_seq_replace_with_pass(seq, n + 1,
stmt->lineno, stmt->col_offset, arena);
@@ -816,9 +809,34 @@
{
return optimize_expr_seq(&expr->v.Tuple.elts, arena);
}
+ case Name_kind:
+ {
+ const char* id = PyString_AS_STRING(expr->v.Name.id);
+ PyObject* constvalue = NULL;
+ /* XXX: dunno if we need to incref these or if Const()
+ * takes care of that */
+ if (strcmp(id, "None") == 0) {
+ Py_INCREF(Py_None);
+ constvalue = Py_None;
+ }
+ else if (strcmp(id, "True") == 0) {
+ Py_INCREF(Py_True);
+ constvalue = Py_True;
+ }
+ else if (strcmp(id, "False") == 0) {
+ Py_INCREF(Py_False);
+ constvalue = Py_False;
+ }
+
+ if (constvalue != NULL)
+ *expr_ptr = Const(constvalue, expr->lineno,
+ expr->col_offset, arena);
+
+ return 1;
+ }
case Num_kind:
case Str_kind:
- case Name_kind:
+ case Const_kind:
{
return 1;
}
Modified: python/branches/tlee-ast-optimize/Python/peephole.c
==============================================================================
--- python/branches/tlee-ast-optimize/Python/peephole.c (original)
+++ python/branches/tlee-ast-optimize/Python/peephole.c Wed May 7 11:46:25 2008
@@ -135,7 +135,6 @@
int new_line, cum_orig_line, last_line, tabsiz;
int cumlc=0, lastlc=0; /* Count runs of consecutive LOAD_CONSTs */
unsigned int *blocks = NULL;
- char *name;
/* Bail out if an exception is set */
if (PyErr_Occurred())
@@ -201,28 +200,6 @@
codestr[i+3] = NOP;
break;
- /* Replace LOAD_GLOBAL/LOAD_NAME None
- with LOAD_CONST None */
- case LOAD_NAME:
- case LOAD_GLOBAL:
- j = GETARG(codestr, i);
- name = PyString_AsString(PyTuple_GET_ITEM(names, j));
- if (name == NULL || strcmp(name, "None") != 0)
- continue;
- for (j=0 ; j < PyList_GET_SIZE(consts) ; j++) {
- if (PyList_GET_ITEM(consts, j) == Py_None)
- break;
- }
- if (j == PyList_GET_SIZE(consts)) {
- if (PyList_Append(consts, Py_None) == -1)
- goto exitUnchanged;
- }
- assert(PyList_GET_ITEM(consts, j) == Py_None);
- codestr[i] = LOAD_CONST;
- SETARG(codestr, i, j);
- cumlc = lastlc + 1;
- break;
-
/* Try to fold tuples of constants (includes a case for lists
which are only used for "in" and "not in" tests).
Skip over BUILD_SEQN 1 UNPACK_SEQN 1.
Modified: python/branches/tlee-ast-optimize/Python/symtable.c
==============================================================================
--- python/branches/tlee-ast-optimize/Python/symtable.c (original)
+++ python/branches/tlee-ast-optimize/Python/symtable.c Wed May 7 11:46:25 2008
@@ -1189,6 +1189,7 @@
break;
case Num_kind:
case Str_kind:
+ case Const_kind:
/* Nothing to do here. */
break;
/* The following exprs can be assignment targets. */
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