These are aids to help in debugging ranger based passes.
I find the ability to dump the current ranger knowledge for the
function being debugged invaluable during development. Similarly for
subsets of the CFG.
Tested with a bootstrap and regtest, as well as countless sessions in
gdb :).
OK?
gcc/ChangeLog:
* gimple-range.cc (debug_seed_ranger): New.
(dump_ranger): New.
(debug_ranger): New.
---
gcc/gimple-range.cc | 71 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 71 insertions(+)
diff --git a/gcc/gimple-range.cc b/gcc/gimple-range.cc
index b534b8e0a2c..2a0da417708 100644
--- a/gcc/gimple-range.cc
+++ b/gcc/gimple-range.cc
@@ -1661,4 +1661,75 @@ disable_ranger (struct function *fun)
fun->x_range_query = &global_ranges;
}
+// =========================================
+// Debugging helpers.
+// =========================================
+
+// Query all statements in the IL to precalculate computable ranges in RANGER.
+
+static DEBUG_FUNCTION void
+debug_seed_ranger (gimple_ranger &ranger)
+{
+ // Recalculate SCEV to make sure the dump lists everything.
+ if (scev_initialized_p ())
+ {
+ scev_finalize ();
+ scev_initialize ();
+ }
+
+ basic_block bb;
+ int_range_max r;
+ FOR_EACH_BB_FN (bb, cfun)
+ {
+ gimple *last = last_stmt (bb);
+ if (last && gimple_get_lhs (last))
+ ranger.range_of_stmt (r, last);
+ }
+}
+
+// Dump all that ranger knows for the current function.
+
+DEBUG_FUNCTION void
+dump_ranger (FILE *out)
+{
+ gimple_ranger ranger;
+ debug_seed_ranger (ranger);
+ ranger.dump (out);
+}
+
+DEBUG_FUNCTION void
+debug_ranger ()
+{
+ dump_ranger (stderr);
+}
+
+// Dump all that ranger knows on a path of BBs.
+
+DEBUG_FUNCTION void
+dump_ranger (FILE *dump_file, const vec<basic_block> &path)
+{
+ if (path.length () == 0)
+ {
+ fprintf (dump_file, "empty\n");
+ return;
+ }
+
+ gimple_ranger ranger;
+ debug_seed_ranger (ranger);
+
+ unsigned i = path.length ();
+ do
+ {
+ i--;
+ ranger.dump_bb (dump_file, path[i]);
+ }
+ while (i > 0);
+}
+
+DEBUG_FUNCTION void
+debug_ranger (const vec<basic_block> &path)
+{
+ dump_ranger (stderr, path);
+}
+
#include "gimple-range-tests.cc"
--
2.31.1
