[Bug middle-end/68117] [6 Regression] error: invalid PHI argument <<< Unknown tree: <invalid tree code> >>>

[gary at intrepid dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68117

--- Comment #34 from Gary Funck <gary at intrepid dot com> ---
(In reply to Richard Biener from comment #33)
> Can you try the patch attached to comment #29?

That seemed to fix the issue in 32/libgfortran, though I haven't tried a build
from scratch yet.

Regarding the patch, in cfgexpand.c, I had to change the call to
redirect_edge_var_map_empty() (was: redirect_edge_var_map_destroy).
Note there is no ggc_collect() call there, it appears in other places
in the patch.