https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64265
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
static void
instrument_func_entry (void)
{
basic_block succ_bb;
gimple_stmt_iterator gsi;
tree ret_addr, builtin_decl;
gimple g;
succ_bb = single_succ (ENTRY_BLOCK_PTR_FOR_FN (cfun));
gsi = gsi_after_labels (succ_bb);
indeed.
It should do
succ_bb = split_edge (single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun)));
gsi = gsi_after_labels (succ_bb);
instead for example. Or use gsi_insert_on_edge_immediate () and insert
on the edge (that avoids splitting the edge if not necessary).
