https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98289
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
--- gcc/shrink-wrap.c.jj 2020-07-28 15:39:09.983756571 +0200
+++ gcc/shrink-wrap.c 2020-12-15 19:15:00.213861334 +0100
@@ -494,7 +494,7 @@ can_get_prologue (basic_block pro, HARD_
edge e;
edge_iterator ei;
FOR_EACH_EDGE (e, ei, pro->preds)
- if (e->flags & (EDGE_COMPLEX | EDGE_CROSSING)
+ if (e->flags & EDGE_COMPLEX
&& !dominated_by_p (CDI_DOMINATORS, e->src, pro))
return false;
fixes it for me. Not sure I understand why EDGE_CROSSING has been listed
there,
if pro is in the cold partition and has EDGE_CROSSING edge leading to it, then
why can't the prologue be added to the cold partition and the jump redirected
to it?
