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Author SHA1 Message Date
Simon Pilgrim 2a9cde026c [X86][AVX] Reduce v4f64/v4i64 shuffle costs (PR37882) 
These were being over cautious for costs for one/two op general shuffles - VSHUFPD doesn't have to replicate the same shuffle in both lanes like VSHUFPS does. 

llvm-svn: 335216
 2018-06-21 11:37:13 +00:00
Simon Pilgrim d08fbf6486 [SLPVectorizer][X86] Add horizontal add/sub tests 
Shows PR37882 perf regression

llvm-svn: 335215
 2018-06-21 11:16:10 +00:00