Use temporary files in lto

[Rafael Espíndola via llvm-commits]

Thanks!

On 28 April 2016 at 19:35, Rui Ueyama <ruiu at google.com> wrote:
> I can run this on Windows for you.
>
> On Thu, Apr 28, 2016 at 4:23 PM, Rafael Espíndola
> <llvm-commits at lists.llvm.org> wrote:
>>
>> This is the idea we chatted today to try to avoid mallocs os windows.
>> I was surprised to find this a small speedup up on linux (with /tmp in
>> tmpfs), so I wonder if we are doing something funny in SmallVector.
>>
>> Linking llvm-as I got
>>
>> master: 29.774786873 seconds
>> patch 29.752283093 seconds
>>
>> Could one of you benchmark this on windows? If it is a performance win
>> there too I will clean the patch up and send for proper review.
>>
>> Cheers,
>> Rafael
>>
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>