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Simon Pilgrim 335a565d46 [DAGCombiner] Combine shuffles of BUILD_VECTOR and SCALAR_TO_VECTOR
This patch attempts to fold the shuffling of 'scalar source' inputs - BUILD_VECTOR and SCALAR_TO_VECTOR nodes - if the shuffle node is the only user. This folds away a lot of unnecessary shuffle nodes, and allows quite a bit of constant folding that was being missed.

Differential Revision: http://reviews.llvm.org/D8516

llvm-svn: 234004
2015-04-03 10:02:21 +00:00
2014-04-07 03:57:04 +00:00
2014-03-02 13:08:46 +00:00
2015-03-27 16:53:06 +00:00
2015-03-12 01:25:29 +00:00

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