[PATCH] A bit-tracking DCE Pass

[James Molloy]

Hi Hal,

No secret: "Type Demotion" - reducing legal types to illegal subword types
if the vectorizer can vectorize a loop. This should help us remove the
inserted zexts/truncs when e.g. i8 is illegal but v8i8 is not.

James

On Sun Feb 15 2015 at 5:20:49 PM hfinkel at anl.gov <hfinkel at anl.gov> wrote:

> In http://reviews.llvm.org/D7531#123922, @jmolloy wrote:
>
> > Hi Hal,
> >
> > I'm looking at using very similar information in a pass I'm writing
> (live bits information). Would it be easy enough to move the AliveBits
> stuff into a utility class so it can be called from elsewhere?
>
>
> Yes, I think we could separate the analysis part from the part that
> removes the completely-dead parts. If you can tell me, what are you working
> on?
>
> > Cheers,
>
> >
>
> > James
>
>
>
> http://reviews.llvm.org/D7531
>
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