[LLVMdev] Recent Commits by Tim Northover

[Renato Golin]

On 4 December 2013 07:42, Tim Northover <t.p.northover at gmail.com> wrote:
> We *could*
> enable it at -Os on M-class CPUs separately, but not without benchmark
> evidence (and I suspect it would have a bad effect even there).

Hi Tim, Gary,

I think this is an interesting proposition...

I don't like checks on CPU name/arch/class to guide low-level
optimization decisions, and adding yet-another space level would
complicate matters. But adding special flags to control fine-grained
behaviour would be possible, and even letting it on by default on
Clang if the arch is M-class.

Not without benchmark evidence, of course.

cheers,
--renato