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/*
Copyright 2011, 2013 David Malcolm <dmalcolm@redhat.com>
Copyright 2011, 2013 Red Hat, Inc.
This is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see
<http://www.gnu.org/licenses/>.
*/
#include <Python.h>
#include "gcc-python.h"
#include "gcc-python-wrappers.h"
#include "gcc-c-api/gcc-cfg.h"
#include "gcc-c-api/gcc-gimple.h"
#include "gcc-c-api/gcc-private-compat.h" /* for now */
#if 1
/* Ideally we wouldn't have these includes here: */
#include "basic-block.h"
#include "rtl.h"
#endif
/*
"struct edge_def" is declared in basic-block.h, c.f:
struct GTY(()) edge_def {
... snip ...
}
and there are these typedefs to pointers defined in coretypes.h:
typedef struct edge_def *edge;
typedef const struct edge_def *const_edge;
*/
union cfg_edge_or_ptr {
gcc_cfg_edge edge;
void *ptr;
};
PyObject *
real_make_edge(void * ptr)
{
union cfg_edge_or_ptr u;
u.ptr = ptr;
struct PyGccEdge *obj;
if (!u.edge.inner) {
Py_RETURN_NONE;
}
obj = PyGccWrapper_New(struct PyGccEdge, &PyGccEdge_TypeObj);
if (!obj) {
goto error;
}
obj->e = u.edge;
return (PyObject*)obj;
error:
return NULL;
}
static PyObject *edge_wrapper_cache = NULL;
PyObject *
PyGccEdge_New(gcc_cfg_edge e)
{
union cfg_edge_or_ptr u;
u.edge = e;
return PyGcc_LazilyCreateWrapper(&edge_wrapper_cache,
u.ptr,
real_make_edge);
}
void
PyGcc_WrtpMarkForPyGccEdge(PyGccEdge *wrapper)
{
/* Mark the underlying object (recursing into its fields): */
gcc_cfg_edge_mark_in_use(wrapper->e);
}
IMPL_APPENDER(add_edge_to_list,
gcc_cfg_edge,
PyGccEdge_New)
PyObject *
PyGccBasicBlock_repr(struct PyGccBasicBlock * self)
{
return PyGccString_FromFormat("%s(index=%i)",
Py_TYPE(self)->tp_name,
gcc_cfg_block_get_index(self->bb));
}
PyObject *
PyGccBasicBlock_get_preds(PyGccBasicBlock *self, void *closure)
{
IMPL_LIST_MAKER(gcc_cfg_block_for_each_pred_edge,
self->bb,
add_edge_to_list)
}
PyObject *
PyGccBasicBlock_get_succs(PyGccBasicBlock *self, void *closure)
{
IMPL_LIST_MAKER(gcc_cfg_block_for_each_succ_edge,
self->bb,
add_edge_to_list)
}
IMPL_APPENDER(append_gimple_to_list,
gcc_gimple,
PyGccGimple_New)
PyObject *
PyGccBasicBlock_get_gimple(PyGccBasicBlock *self, void *closure)
{
assert(self);
assert(self->bb.inner);
IMPL_LIST_MAKER(gcc_cfg_block_for_each_gimple,
self->bb,
append_gimple_to_list)
}
static PyObject*
PyGccGimple_New_phi(gcc_gimple_phi phi)
{
return PyGccGimple_New(gcc_gimple_phi_as_gcc_gimple(phi));
}
IMPL_APPENDER(append_gimple_phi_to_list,
gcc_gimple_phi,
PyGccGimple_New_phi)
PyObject *
PyGccBasicBlock_get_phi_nodes(PyGccBasicBlock *self, void *closure)
{
assert(self);
assert(self->bb.inner);
IMPL_LIST_MAKER(gcc_cfg_block_for_each_gimple_phi,
self->bb,
append_gimple_phi_to_list)
}
IMPL_APPENDER(append_rtl_to_list,
gcc_rtl_insn,
PyGccRtl_New)
PyObject *
PyGccBasicBlock_get_rtl(PyGccBasicBlock *self, void *closure)
{
assert(self);
assert(self->bb.inner);
IMPL_LIST_MAKER(gcc_cfg_block_for_each_rtl_insn,
self->bb,
append_rtl_to_list)
}
/*
Force a 1-1 mapping between pointer values and wrapper objects
*/
PyObject *
PyGcc_LazilyCreateWrapper(PyObject **cache,
void *ptr,
PyObject *(*ctor)(void *ptr))
{
PyObject *key = NULL;
PyObject *oldobj = NULL;
PyObject *newobj = NULL;
/* printf("PyGcc_LazilyCreateWrapper(&%p, %p, %p)\n", *cache, ptr, ctor); */
assert(cache);
/* ptr is allowed to be NULL */
assert(ctor);
/* The cache is lazily created: */
if (!*cache) {
*cache = PyDict_New();
if (!*cache) {
return NULL;
}
}
key = PyLong_FromVoidPtr(ptr);
if (!key) {
return NULL;
}
oldobj = PyDict_GetItem(*cache, key);
if (oldobj) {
/* The cache already contains an object wrapping "ptr": reuse t */
/* printf("reusing %p for %p\n", oldobj, ptr); */
Py_INCREF(oldobj); /* it was a borrowed ref */
Py_DECREF(key);
return oldobj;
}
/*
Not in the cache: we don't yet have a wrapper object for this pointer
*/
assert(NULL != key); /* we own a ref */
assert(NULL == oldobj);
assert(NULL == newobj);
/* Construct a wrapper : */
newobj = (*ctor)(ptr);
if (!newobj) {
Py_DECREF(key);
return NULL;
}
/* printf("created %p for %p\n", newobj, ptr); */
if (PyDict_SetItem(*cache, key, newobj)) {
Py_DECREF(newobj);
Py_DECREF(key);
return NULL;
}
Py_DECREF(key);
return newobj;
}
int
PyGcc_insert_new_wrapper_into_cache(PyObject **cache,
void *ptr,
PyObject *obj)
{
PyObject *key;
assert(cache);
assert(ptr);
assert(obj);
/* The cache is lazily created: */
if (!*cache) {
*cache = PyDict_New();
if (!*cache) {
return -1;
}
}
key = PyLong_FromVoidPtr(ptr);
if (!key) {
return -1;
}
if (PyDict_SetItem(*cache, key, obj)) {
Py_DECREF(key);
return -1;
}
Py_DECREF(key);
return 0;
}
union cfg_block_or_ptr {
gcc_cfg_block block;
void *ptr;
};
static PyObject *
real_make_basic_block_wrapper(void *ptr)
{
union cfg_block_or_ptr u;
struct PyGccBasicBlock *obj;
u.ptr = ptr;
if (!u.block.inner) {
Py_RETURN_NONE;
}
obj = PyGccWrapper_New(struct PyGccBasicBlock, &PyGccBasicBlock_TypeObj);
if (!obj) {
goto error;
}
#if 0
printf("bb: %p\n", bb);
printf("bb->flags: 0x%x\n", bb->flags);
printf("bb->flags & BB_RTL: %i\n", bb->flags & BB_RTL);
if (bb->flags & BB_RTL) {
printf("bb->il.rtl: %p\n", bb->il.rtl);
} else {
printf("bb->il.gimple: %p\n", bb->il.gimple);
if (bb->il.gimple) {
/*
See http://gcc.gnu.org/onlinedocs/gccint/GIMPLE.html
and also gimple-pretty-print.c
coretypes.h has:
struct gimple_seq_d;
typedef struct gimple_seq_d *gimple_seq;
and gimple.h has:
"A double-linked sequence of gimple statements."
struct GTY ((chain_next ("%h.next_free"))) gimple_seq_d {
... snip ...
}
and:
struct gimple_seq_node_d;
typedef struct gimple_seq_node_d *gimple_seq_node;
and:
struct GTY((chain_next ("%h.next"), chain_prev ("%h.prev"))) gimple_seq_node_d {
gimple stmt;
struct gimple_seq_node_d *prev;
struct gimple_seq_node_d *next;
};
and coretypes.h has:
union gimple_statement_d;
typedef union gimple_statement_d *gimple;
and gimple.h has the "union gimple_statement_d", and another
set of codes for this
*/
printf("bb->il.gimple->seq: %p\n", bb->il.gimple->seq);
printf("bb->il.gimple->phi_nodes: %p\n", bb->il.gimple->phi_nodes);
{
gimple_stmt_iterator i;
for (i = gsi_start (bb->il.gimple->seq); !gsi_end_p (i); gsi_next (&i)) {
gimple stmt = gsi_stmt(i);
printf(" gimple: %p code: %s (%i) %s:%i num_ops=%i\n",
stmt,
gimple_code_name[gimple_code(stmt)],
gimple_code(stmt),
gimple_filename(stmt),
gimple_lineno(stmt),
gimple_num_ops(stmt));
//print_generic_stmt (stderr, stmt, 0);
}
}
}
}
#endif
obj->bb = u.block;
return (PyObject*)obj;
error:
return NULL;
}
void
PyGcc_WrtpMarkForPyGccBasicBlock(PyGccBasicBlock *wrapper)
{
/* Mark the underlying object (recursing into its fields): */
gcc_cfg_block_mark_in_use(wrapper->bb);
}
static PyObject *basic_block_wrapper_cache = NULL;
PyObject *
PyGccBasicBlock_New(gcc_cfg_block bb)
{
return PyGcc_LazilyCreateWrapper(&basic_block_wrapper_cache,
bb.inner,
real_make_basic_block_wrapper);
}
static bool
add_block_to_list(gcc_cfg_block bb, void *user_data)
{
PyObject *result = (PyObject*)user_data;
PyObject *obj_var;
obj_var = PyGccBasicBlock_New(bb);
if (!obj_var) {
return true;
}
/* It appears that with optimization there can be occasional NULLs,
which get turned into None. Skip them:
*/
if (obj_var != Py_None) {
if (-1 == PyList_Append(result, obj_var)) {
Py_DECREF(obj_var);
return true;
}
/* Success: */
}
Py_DECREF(obj_var);
return false;
}
PyObject *
PyGccCfg_get_basic_blocks(PyGccCfg *self, void *closure)
{
IMPL_LIST_MAKER(gcc_cfg_for_each_block,
self->cfg,
add_block_to_list)
}
extern PyTypeObject PyGccLabelDecl_TypeObj;
PyObject *
PyGccCfg_get_block_for_label(PyObject *s, PyObject *args)
{
struct PyGccCfg *self = (struct PyGccCfg *)s;
struct PyGccTree *label_decl;
int uid;
basic_block bb;
if (!PyArg_ParseTuple(args,
"O!:get_block_for_label",
&PyGccLabelDecl_TypeObj, &label_decl)) {
return NULL;
}
/* See also gcc/tree-cfg.c: label_to_block_fn */
uid = LABEL_DECL_UID(label_decl->t.inner);
if (uid < 0 ||
(
(
#if (GCC_VERSION >= 4008)
vec_safe_length(self->cfg.inner->x_label_to_block_map)
#else
VEC_length (basic_block, self->cfg.inner->x_label_to_block_map)
#endif
)
<=
(unsigned int) uid)
) {
return PyErr_Format(PyExc_ValueError,
"uid %i not found", uid);
}
bb = GCC_COMPAT_VEC_INDEX(basic_block,
self->cfg.inner->x_label_to_block_map,
uid);
return PyGccBasicBlock_New(gcc_private_make_cfg_block(bb));
}
union gcc_cfg_as_ptr {
gcc_cfg cfg;
void *ptr;
};
PyObject *
real_make_cfg_wrapper(void *ptr)
{
struct PyGccCfg *obj;
union gcc_cfg_as_ptr u;
u.ptr = ptr;
if (!u.cfg.inner) {
Py_RETURN_NONE;
}
obj = PyGccWrapper_New(struct PyGccCfg, &PyGccCfg_TypeObj);
if (!obj) {
goto error;
}
obj->cfg = u.cfg;
return (PyObject*)obj;
error:
return NULL;
}
static PyObject *cfg_wrapper_cache = NULL;
PyObject *
PyGccCfg_New(gcc_cfg cfg)
{
union gcc_cfg_as_ptr u;
u.cfg = cfg;
return PyGcc_LazilyCreateWrapper(&cfg_wrapper_cache,
u.ptr,
real_make_cfg_wrapper);
}
void
PyGcc_WrtpMarkForPyGccCfg(PyGccCfg *wrapper)
{
/* Mark the underlying object (recursing into its fields): */
gcc_cfg_mark_in_use(wrapper->cfg);
}
/*
PEP-7
Local variables:
c-basic-offset: 4
indent-tabs-mode: nil
End:
*/
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