[Bug c/38470] value range propagation (VRP) would improve -Wsign-compare

[amacleod at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38470

--- Comment #20 from Andrew Macleod <amacleod at redhat dot com> ---
No plans at this point to have VRP info in the front end since it requires SSA.