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4 Commits

Author SHA1 Message Date
Simon Pilgrim b398da1d5c [X86][SSE] shift/rotate tests - remove unnecessary mcpu arguments and regenerate/cleanup 
llvm-svn: 251232
 2015-10-25 12:07:45 +00:00
Simon Pilgrim 7430804fe1 [DAGCombiner] Generalize masking of constant rotates. 
We don't need a mask of a rotation result to be a constant splat - any constant scalar/vector can be usefully folded.

Followup to D13851.

llvm-svn: 251197
 2015-10-24 18:44:52 +00:00
Simon Pilgrim d5ef318b5b [X86][XOP] Add support for lowering vector rotations 
This patch adds support for lowering to the XOP VPROT / VPROTI vector bit rotation instructions.

This has required changes to the DAGCombiner rotation pattern matching to support vector types - so far I've only changed it to support splat vectors, but generalising this further is feasible in the future.

Differential Revision: http://reviews.llvm.org/D13851

llvm-svn: 251188
 2015-10-24 13:17:26 +00:00
Simon Pilgrim 4708060e94 [X86][SSE] Add vector bit rotation tests. 
llvm-svn: 250656
 2015-10-18 12:54:37 +00:00