[Bug tree-optimization/70700] ICE using -fdump-tree-all-graph option

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70700

--- Comment #8 from vries at gcc dot gnu.org ---
Created attachment 38386
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38386&action=edit
proposed patch

Patch with testcase included. I'll put this through testing.