[patch] Simplify arange output

[David Blaikie]

Might be easier to review in Phab.

I get some/most of it - but not sure about some other bits. Like why did
the "if (!Section) {" section move from before to after the sort ("// Sort
the symbols by offset within the section.")?

On Wed, Jan 28, 2015 at 7:51 AM, Rafael Espíndola <
rafael.espindola at gmail.com> wrote:

> I was looking at emitDebugARanges and noticed it was the only user of
>  SectionMap.
>
> The attached patch changes it to compute SectionMap and saves a call to
> sort.
>
> Cheers,
> Rafael
>
>
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