[PATCH] Diagnose pr54694

[H.J. Lu]

On Wed, Jan 15, 2014 at 8:23 AM, Richard Henderson <rth@redhat.com> wrote:
> IMO the test case is invalid, but as always an ICE is unacceptable.
>
> I can imagine there are some legitimate uses for absconding with
> the hard frame pointer, under -fomit-frame-pointer plus knowledge
> that the code is simple enough.
>
> Previously when we got into this situation, we'd silently smash the
> hard frame pointer.  The user would find out the problem only through
> testing.  But the dwarf2cfi pass has consistency checks that trigger.
>
> This patch preserves the "simple enough" case while generating an
> error early enough that the dwarf2cfi pass doesn't run.
>
> Tested on i386 and ppc64.
>

We should add a testcase to verify this.


-- 
H.J.