[Bug c/119183] [12/13/14/15 Regression] Compilation takes a long time on semi big inner expression

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119183

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
It would ask for a flag on the tree nodes so we don't repeatedly recurse down
the tree.  TREE_NO_SIDE_EFFECTS?

But yes, limiting the search depth is the simplest solution.