[PATCH] Add optimization remarks to the loop unroller and vectorizer.

Diego Novillo dnovillo at google.com
Wed Apr 23 10:06:27 PDT 2014

On Tue, Apr 22, 2014 at 9:24 PM, Hal Finkel <hfinkel at anl.gov> wrote:

> Thinking about it, it is probably pretty rare that no other pass splits
the preheader. Nevertheless, I'd prefer to be smart about it if practical.
Is there
> some way we can choose the "last" debug location?

Sure. I've changed it to anchor on the terminating instruction of the
preheader or header (whichever gets a debug loc). I suspect that we will
not always get a clean spot. This depends a lot on how much optimizations
manage to preserve !dbg metadata. But we can tackle those oddities as we
find them.

> I like this better.

OK. Fixed.

Thanks. Diego.
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