Arnold Schwaighofer 7ee53cac80 SLPVectorizer: An in-tree vectorized entry cannot also be a scalar external use
We were creating external uses for scalar values in MustGather entries that also
had a ScalarToTreeEntry (they also are present in a vectorized tuple). This
meant we would keep a value 'alive' as a scalar and vectorized causing havoc.
This is not necessary because when we create a MustGather vector we explicitly
create external uses entries for the insertelement instructions of the
MustGather vector elements.

Fixes PR18129.

radar://15582184

llvm-svn: 196508
2013-12-05 15:14:40 +00:00
2013-12-05 13:11:33 +00:00
2013-11-28 23:35:08 +00:00
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