[llvm-commits] [llvm] r76733 - in /llvm/trunk: lib/Target/ELFTargetAsmInfo.cpp test/CodeGen/Mips/2008-07-22-Cstpool.ll

[Chris Lattner]

On Jul 22, 2009, at 10:35 AM, Eric Christopher wrote:

>
> On Jul 22, 2009, at 9:38 AM, Chris Lattner wrote:
>
>> Does anyone know what the deal is with this flag?  Is it supported on
>> some targets, but not others?  Is it supported for some kinds of
>> globals but not others?  BFD has this comment:
>>
>>  {* This section contains "short" data, and should be placed
>>     "near" the GP.  *}
>> #define SEC_SMALL_DATA 0x400000
>>
>> Which isn't super helpful.  It's unclear to me exactly what this is
>> useful for, since the assembler is being told the size of the  
>> elements
>> in the section.
>
> It's really fairly target dependent. Mips, for example, uses it on the
> embedded side for various different types of symbols. Not-under mips-
> linux though. From a quick look it appears that some of the ppc bits
> use small data, I'm uncertain about OS support etc though. i386
> doesn't use it at all :)

Ok, Kevin informs me that the small flag was a "disaster" at mips, so  
I've zapped it. :)

-Chris