Hello All,
I am interested in getting the source location (at least the start
source file, linenumber, and possibly column number and end source
file, linenumber, ...) of
a GIMPLE/SSA tree (I want the corresponding source location, I very
much realize that the source location might not exist)
a basic block
a cgraph node
So far, for the GIMPLE/SSA tree, I'm doing something like
################################################################
/***
* return true if a (GIMPLE/SSA) tree TR has a position
* and in that case fill the PFILENAME and PLINENO
***/
bool comprobe_get_position(tree tr, char**pfilename, int* plineno)
{
if (EXPR_P (tr))
{
const char **pfile = expr_filename (tr);
if (pfile)
{
*pfilename = *pfile;
*plineno = EXPR_LINENO (tr);
return;
}
}
else if (GIMPLE_STMT_P (tr))
{
const char **pfile = expr_filename (tr);
if (pfile)
{
*pffilename = *pfile;
*plineno = EXPR_LINENO (tr);
}
}
else if (GIMPLE_TUPLE_P (tr) && GIMPLE_TUPLE_HAS_LOCUS_P (tr))
{
#warning dont know how to get location of a tuple
gcc_unreachable ();
}
if (TREE_CODE (tr) == STATEMENT_LIST)
{
tree_stmt_iterator iter;
tree tr_stmt;
for (iter = tsi_start (tr_body); !tsi_end_p (iter);
tsi_next (&iter))
{
tr_stmt = tsi_stmt (iter);
if (comprobe_get_position(tr_stmt, pfilename, plineno))
return TRUE;
}
}
return FALSE;
}
################################################################
For a basic block, I don't know how to handle it
for a cgraph (cgr), since I'm interested in getting the location of the body of
functions, I would do something like
tree tr_body = DECL_SAVED_TREE(cgr->decl);
return comprobe_get_position(trbody, pfilename, plineno)
I welcome any comments or advices.... Notice that I don't know how to
get location of tuple trees.
I do know that this position information is not always available, but
I also know that the debugging information which is output with the -g
option is usually quite smart on this, so the information is somehow
"usually" available.
(I'm working on the compiler probe idea, and on static analysis, so I
am interested in being able to show various infered properties about
gimple trees, and later to produce possible warnings about them).
I wish a very happy New Year 2007 to evryone!
Regards
--
Basile STARYNKEVITCH http://starynkevitch.net/Basile/
email: basile<at>starynkevitch<dot>net mobile: +33 6 8501 2359
8, rue de la Faïencerie, 92340 Bourg La Reine, France
*** opinions {are only mines, sont seulement les miennes} ***
