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Author SHA1 Message Date
Benjamin Kramer 76268ac682 X86: Turn mul of <4 x i32> into pmuludq when no SSE4.1 is available. 
pmuludq is slow, but it turns out that all the unpacking and packing of the
scalarized mul is even slower. 10% speedup on loop-vectorized paq8p.

llvm-svn: 170985
 2012-12-22 16:07:56 +00:00