Hal Finkel 204bf5352a By default, use Early-CSE instead of GVN for vectorization cleanup. ...

As has been suggested by Duncan and others, Early-CSE and GVN should
do similar redundancy elimination, but Early-CSE is much less expensive.
Most of my autovectorization benchmarks show a performance regresion, but
all of these are < 0.1%, and so I think that it is still worth using
the less expensive pass.

llvm-svn: 154673

2012-04-13 17:15:33 +00:00

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