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Date: Tue, 04 Nov 2014 17:56:00 -0000
From: Andrew MacLeod <amacleod@redhat.com>
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To: Richard Henderson <rth@redhat.com>, gcc-patches <gcc-patches@gcc.gnu.org>
CC: Jeff Law <law@redhat.com>, Richard Biener <richard.guenther@gmail.com>
Subject: Re: [patch] Provide a can_compare_and_swap_p target hook.
References: <5458FE9C.2090409@redhat.com> <54590C19.40208@redhat.com>
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On 11/04/2014 12:25 PM, Richard Henderson wrote:
> On 11/04/2014 05:28 PM, Andrew MacLeod wrote:
>> + bool
>> + default_can_compare_and_swap_p (machine_mode mode, bool allow_libcall)
>> + {
>> +   return can_compare_and_swap_p (mode, allow_libcall);
>> + }
> This is silly.  I think the problem you point out can be better fixed by moving
> the can_compare_and_swap_p prototype elsewhere.
>
yeah, except it uses some of the optab table stuff that is static to 
optabs.c...   so the basic functionality remains there.   we could stick 
a wrapper somewhere else... but thats effectively what this does.
we are asking a question about target behaviour...

Im open to other suggestions..

Andrew