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Author SHA1 Message Date
Simon Pilgrim dd6ca639d5 [DAGCombine] Add (sext_in_reg (zext x)) -> (sext x) combine 
Handle the case where a sign extension has ended up being split into separate stages (typically to get around vector legal ops) and a zext + sext_in_reg gets inserted.

Differential Revision: https://reviews.llvm.org/D27461

llvm-svn: 288842
 2016-12-06 19:09:37 +00:00
Simon Pilgrim 0caaadfc2d [X86][SSE] Added vector sext_in_reg combine tests 
llvm-svn: 288819
 2016-12-06 15:57:26 +00:00