[Bug rtl-optimization/59393] [6/7/8 regression] mips16/7/8 code size

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59393

--- Comment #12 from Jeffrey A. Law <law at redhat dot com> ---
One more tidbit here.  I noted that we got "reasonably" close to having enough
state in the combiner to attack this in c#7.  The problem is there's a REG
object that we really need to be a CONST_INT.

It turns out that we're failing to substitute the value from a REG_EQUAL note
as combine builds up that hunk of RTL.  So if we were to substitute in the
REG_EQUAL, then we'd have a fighting chance to address this in the combiner.