[llvm-commits] [llvm-gcc-4.2] r93409 - /llvm-gcc-4.2/trunk/gcc/llvm-convert.cpp

[Duncan Sands]

Hi Jim,

>>> +#if defined(TARGET_ARM) && defined(CONFIG_DARWIN_H)
>>
>> Should this really be conditioned on the OS (darwin)?  After all, how
>> barriers work should be a processor issue, not an OS one...
>>
> 
> Unfortunately, it's a bit of both, and there's not a really good way of 
> expressing everything right now. For example, on ARMv7, which 
> instructions should be used, and which sharability regions should be 
> specified, can vary depending on thing like whether the system is 
> multi-core or not, whether synchronization with peripherals is required, 
> etc.. For the time being, the OS+Target pair is being used to express 
> that. I'm not really fond of that aspect, but don't have a strong answer 
> for a replacement.

thanks for the explanation.

Ciao,

Duncan.