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Author SHA1 Message Date
Paul Redmond 5fdf836ba4 Add support for llvm.vectorizer metadata 
- llvm.loop.parallel metadata has been renamed to llvm.loop to be more generic
  by making the root of additional loop metadata.
  - Loop::isAnnotatedParallel now looks for llvm.loop and associated
    llvm.mem.parallel_loop_access
  - document llvm.loop and update llvm.mem.parallel_loop_access
- add support for llvm.vectorizer.width and llvm.vectorizer.unroll
  - document llvm.vectorizer.* metadata
  - add utility class LoopVectorizerHints for getting/setting loop metadata
  - use llvm.vectorizer.width=1 to indicate already vectorized instead of
    already_vectorized
- update existing tests that used llvm.loop.parallel and
  llvm.vectorizer.already_vectorized

Reviewed by: Nadav Rotem

llvm-svn: 182802
 2013-05-28 20:00:34 +00:00
Manman Ren 1a5ff287fd TBAA: remove !tbaa from testing cases if not used. 
This will make it easier to turn on struct-path aware TBAA since the metadata
format will change.

llvm-svn: 180796
 2013-04-30 17:52:57 +00:00
Pekka Jaaskelainen d3c90e132a Call the potentially costly isAnnotatedParallel() only once. 
Made the uniform write test's checks a bit stricter.

llvm-svn: 180119
 2013-04-23 16:44:43 +00:00
Pekka Jaaskelainen 6f2f66b63f Refuse to (even try to) vectorize loops which have uniform writes, 
even if erroneously annotated with the parallel loop metadata.

Fixes Bug 15794: 
"Loop Vectorizer: Crashes with the use of llvm.loop.parallel metadata"

llvm-svn: 180081
 2013-04-23 08:08:51 +00:00