Hello,
A user sent me a request to give names to the digraph in a graph dump.
This name can be used as a key for the dump, for a tool that can
generate graph metrics to see GCC transforms code as it passes through
the pipeline. Another user requested the same thing for a hacked xdot
that can plot multiple digraphs.
The dumpfile base name seemed like a good name for the digraph. This
patch prints it as the digraph label.
Bootstrapped&tested on powerpc64-unknown-linux-gnu. Tested the graph
dump by dumping the .pre dump for my cc1-i files and plotting them
(*).
OK for trunk?
Ciao!
Steven
(*) note to self: manually tail-merge mark_stmt_necessary calls in
mark_stmt_if_obviously_necessary, or make mark_stmt_necessary
non-inline -- the graphs nicely show terrible code duplication :-)
* graph.c (start_graph_dump): Print dumpfile base name as digraph label.
(clean_graph_dump_file): Pass base to start_graph_dump.
Index: graph.c
===================================================================
--- graph.c (revision 196059)
+++ graph.c (working copy)
@@ -308,11 +308,16 @@ print_graph_cfg (const char *base, struct function
/* Start the dump of a graph. */
static void
-start_graph_dump (FILE *fp)
+start_graph_dump (FILE *fp, const char *base)
{
- fputs ("digraph \"\" {\n"
- "overlap=false;\n",
- fp);
+ pretty_printer *pp = init_graph_slim_pretty_print (fp);
+ pp_string (pp, "digraph \"");
+ pp_write_text_to_stream (pp);
+ pp_string (pp, base);
+ pp_write_text_as_dot_label_to_stream (pp, /*for_record=*/false);
+ pp_string (pp, "\" {\n");
+ pp_string (pp, "overlap=false;\n");
+ pp_flush (pp);
}
/* End the dump of a graph. */
@@ -327,7 +332,7 @@ void
clean_graph_dump_file (const char *base)
{
FILE *fp = open_graph_file (base, "w");
- start_graph_dump (fp);
+ start_graph_dump (fp, base);
fclose (fp);
}
