https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68117
--- Comment #30 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, so we already do
void
remove_edge (edge e)
{
if (current_loops != NULL)
rescan_loop_exit (e, false, true);
/* This is probably not needed, but it doesn't hurt. */
/* FIXME: This should be called via a remove_edge hook. */
if (current_ir_type () == IR_GIMPLE)
redirect_edge_var_map_clear (e);
but we fail to clear the edge map data during RTL expansion. So the simpler
patch
Index: gcc/cfgexpand.c
===================================================================
--- gcc/cfgexpand.c (revision 230404)
+++ gcc/cfgexpand.c (working copy)
@@ -6275,6 +6278,9 @@ pass_expand::execute (function *fun)
expand_phi_nodes (&SA);
+ /* Release any stale SSA redirection data. */
+ redirect_edge_var_map_destroy ();
+
/* Register rtl specific functions for cfg. */
rtl_register_cfg_hooks ();
might be enough.
