[LLVMdev] Removing AvailableExternal values in GlobalDCE (was Re: RFC: ThinLTO Impementation Plan)

[Eric Christopher]

On Mon, Jun 8, 2015 at 1:33 PM Reid Kleckner <rnk at google.com> wrote:

> On Mon, Jun 8, 2015 at 1:08 PM, Eric Christopher <echristo at gmail.com>
> wrote:
>>
>> I'd rather not have it be an llvm option at all. Just construct a
>> different set of passes...
>>
>> This would also solve the problem of needing multiple sets of options to
>> be passed to the builder. It'd be a bit of a change (i.e. having clang do
>> the pass setup), but I think it'd be worth it to have clang be able to
>> explicitly say which passes it wants.
>>
>> It's also a major change and would probably need to be discussed more
>> widely so for now I guess this is sorta ok.
>>
>
> I think for now the bool on PassManagerBuilder is a good way to make
> progress. Eventually, we may want to customize the LTO compilation phase
> optimization more fully (use lower inlining threshold, defer vectorization
> to link time), but we can cross that bridge when we get there.
>

Precisely. In case it wasn't clear I was saying this.

-eric
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