https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64166
--- Comment #2 from dmalcolm at gcc dot gnu.org ---
(In reply to Richard Biener from comment #1)
> Huh, I think you rather want a "stable" introspection (plugin) API. Like the
> treeish one that was proposed at some point but never was finished up. The
> JIT should provide the modification API only.
Perhaps eventually, but that would involve a *lot* of changes:
(A) writing this new API
(B) having it be usable from the JIT API
(C) probably other things I haven't thought of yet.
I hope to tackle (A) and (B) in the gcc 6 timeframe.
In the meantime, I have a mostly-working way of getting at the dumps via a new
gcc_jit_context_enable_dump entrypoint, which looks like this:
static char *trig_sincos_dump;
static char *trig_statistics_dump;
static void
create_test_of_builtin_trig (gcc_jit_context *ctxt)
{
/* snip */
gcc_jit_context_enable_dump (ctxt,
"tree-sincos",
&trig_sincos_dump);
gcc_jit_context_enable_dump (ctxt,
"statistics",
&trig_statistics_dump);
/* snip */
}
static void
verify_test_of_builtin_trig (gcc_jit_context *ctxt, gcc_jit_result *result)
{
/* snip */
/* PR jit/64020:
The "sincos" pass merges sin/cos calls into the cexpi builtin.
Verify that a dump of the "sincos" pass was provided, and that it
shows a call to the cexpi builtin on a SSA name of "theta". */
CHECK_NON_NULL (trig_sincos_dump);
CHECK_STRING_CONTAINS (trig_sincos_dump, " = __builtin_cexpi (theta_");
free (trig_sincos_dump);
/* Similarly, verify that the statistics dump was provided, and that
it shows the sincos optimization. */
CHECK_NON_NULL (trig_statistics_dump);
CHECK_STRING_CONTAINS (
trig_statistics_dump,
"sincos \"sincos statements inserted\" \"test_of_builtin_trig\" 1");
free (trig_statistics_dump);
}
I'm also experimenting with an API of capturing/verifying statistics:
gcc_jit_context_set_bool_option (ctxt,
GCC_JIT_BOOL_OPTION_GATHER_STATISTICS,
1);
where the verify hook has:
/* We expect exactly one sincos statement to be inserted. */
int sincos_count =
gcc_jit_result_get_int_statistic (result,
"sincos statements inserted");
if (sincos_count == 1)
pass ("%s: %i sincos statements inserted", test, sincos_count);
else
fail ("%s: %i sincos statements inserted", test, sincos_count);
(again, I have this mostly working already, but it might be nice to provide a
richer querying API e.g. for narrowing things down e.g. to a particular
function).
