[patch] Don't make assumptions about the name of private global variables

[Duncan P. N. Exon Smith]

+mgottesman: any idea how to test this?

> On 2014-Nov-10, at 14:08, Rafael Espíndola <rafael.espindola at gmail.com> wrote:
> 
> Private variables are can be renamed, so it is not reliable to make
> decisions on the name.
> 
> The name is also dropped by the assembler before getting to the
> linker, so using the name causes a disconnect between how llvm makes a
> decision (var name) and how the linker makes a decision (section it is
> in).
> 
> The attached patch changes one case where we were looking at the
> variable name to use the section instead.
> 
> I don't know what this arc pass is doing, so I am not sure how to test it.
> 
> Cheers,
> Rafael
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