Improve SLP dump and graph
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Commit Message
The following notes which lanes are considered live and adds an overload
to produce a graphviz graph for multiple entries into an SLP graph.
Bootstrapped on x86_64-unknown-linux-gnu, testing in progress.
* tree-vect-slp.cc (vect_print_slp_tree): Mark live lanes.
(dot_slp_tree): New overload for multiple entries.
---
gcc/tree-vect-slp.cc | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
@@ -2759,7 +2759,9 @@ vect_print_slp_tree (dump_flags_t dump_kind, dump_location_t loc,
}
if (SLP_TREE_SCALAR_STMTS (node).exists ())
FOR_EACH_VEC_ELT (SLP_TREE_SCALAR_STMTS (node), i, stmt_info)
- dump_printf_loc (metadata, user_loc, "\tstmt %u %G", i, stmt_info->stmt);
+ dump_printf_loc (metadata, user_loc, "\t%sstmt %u %G",
+ STMT_VINFO_LIVE_P (stmt_info) ? "[l] " : "",
+ i, stmt_info->stmt);
else
{
dump_printf_loc (metadata, user_loc, "\t{ ");
@@ -2840,6 +2842,23 @@ dot_slp_tree (const char *fname, slp_tree node)
fclose (f);
}
+DEBUG_FUNCTION void
+dot_slp_tree (const char *fname, const vec<slp_instance> &slp_instances)
+{
+ FILE *f = fopen (fname, "w");
+ fprintf (f, "digraph {\n");
+ fflush (f);
+ {
+ debug_dump_context ctx (f);
+ hash_set<slp_tree> visited;
+ for (auto inst : slp_instances)
+ dot_slp_tree (f, SLP_INSTANCE_TREE (inst), visited);
+ }
+ fflush (f);
+ fprintf (f, "}\n");
+ fclose (f);
+}
+
/* Dump a slp tree NODE using flags specified in DUMP_KIND. */
static void