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Craig Topper d4310f3853 [DAGCombiner] Add a DAG combine to turn a splat build_vector where the splat elemnt is a bitcast from a vector type into a concat_vector
For example, a build_vector of i64 bitcasted from v2i32 can be turned into a concat_vectors of the v2i32 vectors with a bitcast to a vXi64 type

Differential Revision: https://reviews.llvm.org/D42090

llvm-svn: 322811
2018-01-18 04:17:06 +00:00
2017-12-28 04:10:09 +00:00
2014-03-02 13:08:46 +00:00
2016-01-26 21:29:08 +00:00
2017-09-18 14:33:39 +00:00
2017-01-12 18:02:42 +00:00
2017-08-18 02:39:28 +00:00

Low Level Virtual Machine (LLVM)
================================

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