[llvm-commits] [cfe-commits] Extend Attributes to 64 bits (wrapped in a class), add one more attribute for address safety checking

[Kostya Serebryany]

On Thu, Jan 19, 2012 at 10:14 AM, Kaelyn Uhrain <rikka at google.com> wrote:

> On Thu, Jan 19, 2012 at 9:56 AM, Kostya Serebryany <kcc at google.com> wrote:
>
>>
>>
>> On Thu, Jan 19, 2012 at 1:18 AM, Anton Korobeynikov <
>> anton at korobeynikov.info> wrote:
>>
>>> Hi Kostya,
>>>
>>>
>>> > The patches are attached, the llvm patch is also published
>>> > here: http://codereview.appspot.com/5544058/
>>> What is the performance impact of this?
>>>
>>
>> Good point (I assume you mean compile-time performance, not the
>> performance of compiled programs).
>> I've verified that the compile-time did not change by building 403.gcc
>> and 483.xalancbmk with the original and modified clang with -O1.
>>
>
> Out of curiosity did you check the compile-time performance for 64-bit
> clang/llvm,
>

64-bit.
On 32-bit there may be some change indeed, but we still need more
attributes, right? :)


> 32-bit clang/llvm, or both?  I would imagine that extending attributes to
> 64-bit would have negligible impact for a 64-bit compiler binary but
> potentially greater impact for a 32-bit one as they would no longer fit in
> a single register.
>
> Cheers,
> Kaelyn
>
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