[PATCH] Add return value attribute to C interface

[Reid Kleckner]

The larger picture is that LLVM IR supports arbitrary string attributes,
and a bitmask is no longer an appropriate representation for attributes.
 Bill Wendling never extended the C API to support this.  Furthermore, we
have more than 32 known, single-bit, enum attributes, so even if we ignore
string attributes, a 32-bit bitmask is insufficient.


On Mon, Jun 30, 2014 at 8:18 PM, deadal nix <deadalnix at gmail.com> wrote:

> OK,
>
> Can you explain me the larger picture here ? I can probably come up with
> something. Being able to specify attributes on return value is important to
> me, and I can't use the C++ API.
>
>
> 2014-06-30 11:36 GMT-07:00 Reid Kleckner <rnk at google.com>:
>
> I'm not excited to add new APIs that use LLVMAttribute.  See this comment
>> from the end of the enum in Core.h:
>>     /* FIXME: These attributes are currently not included in the C API as
>>        a temporary measure until the API/ABI impact to the C API is
>> understood
>>        and the path forward agreed upon.
>>     LLVMAddressSafety = 1ULL << 32,
>>     LLVMStackProtectStrongAttribute = 1ULL<<33,
>>     LLVMCold = 1ULL << 34,
>>     LLVMOptimizeNone = 1ULL << 35,
>>     LLVMInAllocaAttribute = 1ULL << 36,
>>     LLVMNonNullAttribute = 1ULL << 37,
>>     LLVMJumpTableAttribute = 1ULL << 38,
>>     */
>>
>> We haven't addressed this for over a year.
>>
>> If you're interested in fleshing out the C API attribute support, do you
>> mind proposing something that solves this problem?
>>
>>
>>
>> On Mon, Jun 30, 2014 at 11:24 AM, deadal nix <deadalnix at gmail.com> wrote:
>>
>>> Pong \o/
>>>
>>>
>>> 2014-06-26 22:00 GMT-07:00 deadal nix <deadalnix at gmail.com>:
>>>
>>> ping ?
>>>>
>>>>
>>>> 2014-06-24 16:02 GMT-07:00 deadal nix <deadalnix at gmail.com>:
>>>>
>>>> ping !
>>>>>
>>>>>
>>>>> 2014-06-20 18:39 GMT-07:00 deadal nix <deadalnix at gmail.com>:
>>>>>
>>>>> ping ping ?
>>>>>>
>>>>>>
>>>>>> 2014-06-17 19:11 GMT-07:00 deadal nix <deadalnix at gmail.com>:
>>>>>>
>>>>>> ping ?
>>>>>>>
>>>>>>>
>>>>>>> 2014-06-14 23:47 GMT-07:00 deadal nix <deadalnix at gmail.com>:
>>>>>>>
>>>>>>> As per title. Right now, the API do not provide any way to set
>>>>>>>> attributes for return values of function.
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
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>>
>
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