> 2025-03-25 Jakub Jelinek <ja...@redhat.com>
> Andi Kleen <a...@gcc.gnu.org>
>
> PR gcov-profile/118442
> * profile.cc (branch_prob): Ignore EDGE_FAKE edges from musttail calls
> to EXIT.
>
> * c-c++-common/pr118442.c: New test.
>
> --- gcc/profile.cc.jj 2025-01-02 11:23:16.458517673 +0100
> +++ gcc/profile.cc 2025-03-25 09:57:21.860398601 +0100
> @@ -1340,6 +1340,20 @@ branch_prob (bool thunk)
> EDGE_INFO (e)->ignore = 1;
> ignored_edges++;
> }
> + /* Ignore fake edges after musttail calls. */
> + if ((e->flags & EDGE_FAKE)
> + && e->dest == EXIT_BLOCK_PTR_FOR_FN (cfun))
> + {
> + gimple_stmt_iterator gsi = gsi_last_bb (e->src);
At least the musttail pass allows some statements after the call, like labels
and debug information. Not sure if it matters.
The rest looks good to me.
-Andi
> + gimple *stmt = gsi_stmt (gsi);
> + if (stmt
> + && is_gimple_call (stmt)
> + && gimple_call_must_tail_p (as_a <const gcall *> (stmt)))
> + {
> + EDGE_INFO (e)->ignore = 1;
> + ignored_edges++;
> + }
> + }
> }
