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

--- Comment #13 from Aldy Hernandez <aldyh at redhat dot com> ---
Do we care though?  Does this bug pose a big enough problem on non
MIPS16 that we would like addressed?  Just curious....

On Sun, Feb 4, 2018 at 10:50 AM, law at redhat dot com
<gcc-bugzi...@gcc.gnu.org> wrote:
> 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.
>
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