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3 Commits

Author SHA1 Message Date
Simon Pilgrim 618d3aedaf [DAGCombiner] Add general constant vector support to (srl (shl x, c), c) -> (and x, cst2) 
We already supported scalar constant / splatted constant vector - now accepts any (non opaque) constant scalar / vector

llvm-svn: 284717
 2016-10-20 11:10:21 +00:00
Simon Pilgrim b2ca2505cc [DAGCombine] Generalize distributeTruncateThroughAnd to work with any non-opaque constant or constant vector 
llvm-svn: 284574
 2016-10-19 08:57:37 +00:00
Simon Pilgrim 476560aac4 [X86][SSE] Added vector lshr/shl combine tests 
This doesn't cover all combines in DAGCombiner::visitSRL/visitSHL yet, but identifies several cases where we fail to combine vectors (or non-splatted) vectors

llvm-svn: 284518
 2016-10-18 19:28:12 +00:00