[Bug tree-optimization/85627] [6/7/8/9 Regression] ICE in update_phi_components in tree-complex.c

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85627

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Part of the fix:

Index: gcc/tree-complex.c
===================================================================
--- gcc/tree-complex.c  (revision 259879)
+++ gcc/tree-complex.c  (working copy)
@@ -1692,6 +1692,8 @@ tree_lower_complex (void)
   for (i = 0; i < n_bbs; i++)
     {
       bb = BASIC_BLOCK_FOR_FN (cfun, rpo[i]);
+      if (!bb)
+       continue;
       update_phi_components (bb);
       for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
        expand_complex_operations_1 (&gsi);