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Re: Internal abort call optimization?
Richard Guenther wrote:
> On Tue, Jun 17, 2008 at 11:33 AM, Andi Kleen <andi@firstfloor.org> wrote:
>> David Kastrup <dak@gnu.org> writes:
>>> However, the problem is obviously not restricted to Emacs. If the
>>> "noreturn" attribute for the internal abort were removed, at least only
>>> abort calls with compatible stack frame and the same (tentative)
>>> followup code would get folded. That would avoid the worst
>>> head-scratchers when trying to figure out what went wrong.
>> Without noreturn gcc wouldn't know there is no return needed after
>> the abort(). Disabling cross jumping would be probably better.
>> I know of a couple of more cases where such an attribute would
>> be useful.
>
> You can also build with -fno-builtin-abort.
But it would still cross jump the call then wouldn't it?
-Andi