XCore target: disable vectorization

[Arnold Schwaighofer]

On Sep 9, 2013, at 11:15 AM, Robert Lytton <robert at xmos.com> wrote:

> Hi Arnold,
> 
> Thank you.
> I did ponder about stopping later, but it seemed sensible/reasonable to stop it earlier but not creating the passes.
> I'll make a suitable patch for review...
> 
> 
> I am curious to know why the TargetTransformInfo is only available via getAnalysis<> (which is only callable during passes?)
> and the SelectionDAG::getTargetTransformInfo()

It is because it needs the Target (TargetLowering) to do its job (in a meaningful way) but we need this information during “opt” passes. The TargetMachine injects this information in "TM->addAnalysisPasses()”. And we have NoTTI when no Target is available (opt).