llvm-project

Commit Graph

Author	SHA1	Message	Date
Michael Liao	55658d4222	Optimize vector select from all 0s or all 1s As packed comparisons in AVX/SSE produce all 0s or all 1s in each SIMD lane, vector select could be simplified to AND/OR or removed if one or both values being selected is all 0s or all 1s. llvm-svn: 179267	2013-04-11 05:15:54 +00:00

Author

SHA1

Message

Date

Michael Liao

55658d4222

Optimize vector select from all 0s or all 1s

As packed comparisons in AVX/SSE produce all 0s or all 1s in each SIMD lane,
vector select could be simplified to AND/OR or removed if one or both values
being selected is all 0s or all 1s.

llvm-svn: 179267

2013-04-11 05:15:54 +00:00

1 Commits