Commit Graph

2 Commits

Author SHA1 Message Date
Simon Pilgrim ca1da1bf07 [X86][SSE] Improved blend+zero target shuffle combining to use combined shuffle mask directly
We currently only combine to blend+zero if the target value type has 8 elements or less, but this was missing a lot of cases where the combined mask had been widened.

This change makes it so we use the combined mask to determine the blend value type, allowing us to catch more widened cases.

llvm-svn: 272003
2016-06-07 12:20:14 +00:00
Simon Pilgrim aab59b7a28 [X86][SSE] Some basic tests for variable shuffles
We don't really support non-constant shuffle masks, but these tests are for cases where BUILD_VECTOR is made up from vector extracts (as well as undef/zero scalars).

llvm-svn: 265045
2016-03-31 20:26:30 +00:00